# List of aircraft registration prefixes

(Direct link to the ICAO document. Lists in different languages)
This is a list of aircraft registration prefixes used by civil aircraft:

## Post-1928 allocations
### Current allocations

The 1928 prefixes have been amended and added to over the years, with the current markings being:
| Country or region | Registration prefix | Presentation and notes |
| Afghanistan | YA | YA-AAA to YA-ZZZ |
| Albania | ZA | ZA-AAA to ZA-ZZZ |
| Algeria | 7T | 7T-VAA to 7T-VZZ Civilian 7T-WAA to 7T-WZZ Military |
| Andorra | C3 | C3-AAA to C3-ZZZ |
| Angola | D2 | D2-AAA to D2-ZZZ |
| Anguilla | VP-A | VP-AAA to VP-AZZ |
| Antigua and Barbuda | V2 | V2-AAA to V2-ZZZ |
| Argentina | LV | LV-AAA to LV-ZZZ (Civilian type certified aircraft) LV-X001 to LV-X999 (experimental) LV-S001 to LV-S999 (LSA) LV-U001 to LV-U999 (Ultralight) |
| Argentina | LQ | LQ-AAA to LQ-ZZZ (Government/police owned aircraft) |
| Armenia | EK | EK-10000 to EK-99999 |
| Aruba | P4 | P4-AAA to P4-ZZZ |
| Australia | VH | VH-AAA to VH-ZZZ VH-22A to VH-ZZ9 |
| Austria | OE | OE-AAA to OE-KZZ OE-BAA to OE-BZZ (official use) OE-LAA to OE-LZZ (airlines operating scheduled flights) OE-VAA to OE-VZZ (test registrations) OE-WAA to OE-WZZ (amphibian and sea planes) OE-XAA to OE-XZZ (helicopters) OE-0001 to OE-5999 (gliders) OE-9000 to OE-9999 (motor gliders) |
| Azerbaijan | 4K | 4K-AZ1 to 4K-AZ999 4K-10000 to 4K-99999 |
| Bahamas | C6 | C6-AAA to C6-ZZZ |
| Bahrain | A9C | A9C-AA to A9C-ZZ A9C-AAA to A9C-ZZZ A9C-AAAA to A9C-ZZZZ |
| Bangladesh | S2 | S2-AAA to S2-ZZZ |
| Barbados | 8P | 8P-AAA to 8P-ZZZ |
| Belarus | EW | EW-10000 to EW-99999 (ex-Soviet Union registrations) EW-100AA to EW-999ZZ (aircraft in general, except those listed below) EW-200PA to EW-299PA (reserved for Boeing 737 aircraft) EW-100PJ to EW-299PJ (reserved for CRJ aircraft) EW-001DA, EW-001PA, EW-001PB, EW-85815 (reserved for official use) EW-0001L to EW-9999L (reserved for balloons) |
| Belgium | OO | OO-AAA to OO-PZZ OO-RAA to OO-SZZ OO-BAA to OO-BZZ (preferred for balloons) OO-YAA to OO-ZAA (preferred for gliders) OO-01 to OO-499 (home-built aircraft) OO-501 to OO-999 & OO-A01 to OO-Z99 (microlights) |
| Belize | V3 | V3-AAA to V3-ZZZ |
| Benin | TY | TY-AAA to TY-ZZZ |
| Bermuda | VP-B, VQ-B | VP-BAA to VP-BZZ, VQ-BAA to VQ-BZZ |
| Bhutan | A5 | A5-AAA to A5-ZZZ |
| Bolivia | CP | CP-1000 to CP-9999 |
| Bosnia and Herzegovina | E7 | E7-AAA to E7-ZZZ |
| Botswana | A2 | A2-AAA to A2-ZZZ |
| Brazil | PP, PT, PR, PU, PS | PP-AAA to PP-ZZZ (Prior to the 1970s, reserved for public and parapublic aircraft) PT-AAA to PT-ZZZ (PT-ZAA to PT-ZZZ reserved to experimental non-LSA aircraft) PR-AAA to PR-ZZZ (PR-ZAA to PR-ZZZ reserved to experimental non-LSA aircraft) PU-AAA to PU-ZZZ (Microlights and experimental LSA aircraft) PS-AAA to PS-ZZZ (Available around 2018 onwards) Until the 1990s, helicopters were preferentially registered with an H after the prefix (example: PT-HNY) |
| British Virgin Islands | VP-L | VP-LAA to VP-LZZ |
| Brunei | V8 | V8-AAA to V8-ZZZ V8-AA1 to V8-ZZ9 V8-001 to V8-999 |
| Bulgaria | LZ | LZ-AAA to LZ-ZZZ |
| Burkina Faso | XT | XT-AAA to XT-ZZZ |
| Burundi | 9U | 9U-AAA to 9U-ZZZ |
| Cambodia | XU | XU-AAA to XU-ZZZ |
| Cameroon | TJ | TJ-AAA to TJ-ZZZ |
| Canada | C | C-FAAA to C-FZZZ CF-AAA to CF-ZZZ (Pre 1957 vintage aircraft may be registered CF- instead of C-F) C-GAAA to C-GZZZ C-IAAA to C-IZZZ (ultralight aeroplanes only) |
| Cape Verde | D4 | D4-AAA to D4-ZZZ |
| Cayman Islands | VP-C, VQ-C | VP-CAA to VP-CZZ, VQ-CAA to VQ-CZZ |
| Central African Republic | TL | TL-AAA to TL-ZZZ |
| Chad | TT | TT-AAA to TT-ZZZ |
| Chile | CC | CC-AAA to CC-ZZZ from July 1, 2009 onwards. Gliders had numbers in between registrations (e.g., CC-K14W) and some balloons too (e.g., CC-P1). Ultralights are registered with the markings ULM-number. |
| China | B | B-0000 to B-9999 B-000A to B-99ZZ (General) |
| Colombia | HJ | HJ-1000A to HJ-9999Z (Microlights) |
| Colombia | HK | HK-1000A to HK-9999Z |
| Comoros | D6 | D6-AAA to D6-ZZZ |
| Congo, Republic of | TN | TN-AAA to TN-ZZZ |
| Congo, Democratic Republic of | 9S | 9S-AAA to 9S-ZZZ |
| Congo, Democratic Republic of | 9T | 9T-AAA to 9T-ZZZ (Military) |
| Cook Islands | E5 | E5-AAA to E5-ZZZ |
| Costa Rica | TI | TI-AAA to TI-ZZZ TI-000 to TI-999 (Ultralight aircraft) |
| Croatia | 9A | 9A-AAA to 9A-ZZZ 9A-GAA to 9A-GZZ (Gliders) 9A-HAA to 9A-HZZ (Helicopters) 9A-OAA to 9A-OZZ (Balloons) 9A-UAA to 9A-UZZ (Ultralights) |
| Cuba | CU | CU-A1000 to CU-A1999 (Agricultural Aircraft) CU-C1000 to CU-C1999 (Airlines, cargo operations) CU-H1000 to CU-H1999 (Helicopters) CU-N1000 to CU-N1999 (Private Aircraft) CU-T1000 to CU-T1999 (Airlines, passenger flights) CU-U1000 to CU-U1999 (Ultralights) |
| Cyprus | 5B | |
| Czech Republic | OK | OK-AAA to OK-ZZZ OK-AAA 00 to OK-ZZZ 99 (Microlights) OK-0000 to OK-9999 (Gliders & balloons) OK-A000 to OK-A999 (Ultralight gliders) OK-X000A to OK-X999Z (Unmanned aircraft) |
| Denmark | OY | OY-AAA to OY-ZZZ OY-HAA to OY-HZZ (Helicopters) Any registration containing X (Gliders including Touring Motor Glider) OY-BAA to OY-BZZ (preferred for hot-air balloons) OY-81 to OY-8999 Ultralight trikes (weight shift control) OY-91 to OY-9999 Ultralight 3-axis OY-1001 to OY-1999 Ultralight Gyro |
| Djibouti | J2 | J2-AAA to J2-ZZZ |
| Dominica | J7 | J7-AAA to J7-ZZZ |
| Dominican Republic | HI | HI100AA to HI999ZZ HI100 to HI1999 |
| East Timor | 4W | 4W-AAA to 4W-ZZZ |
| Ecuador | HC | HC-AAA to HC-ZZZ |
| Egypt | SU | SU-AAA to SU-XXZ SU-ZAA to SU-ZZZ SU-001 to SU-999 (Gliders and balloons) |
| El Salvador | YS | YS-AAA to YS-ZZZ |
| Equatorial Guinea | 3C | 3C-AAA to 3C-ZZZ |
| Eritrea | E3 | E3-AAAA to E3-ZZZZ |
| Estonia | ES | ES-AAA to ES-ZZZ ES-0001 to ES-9999 (gliders and motor gliders) |
| Eswatini | 3DC | 3DC-AAA to 3DC-ZZZ |
| Ethiopia | ET | ET-AAA to ET-ZZZ |
| Falkland Islands | VP-F | VP-FAA to VP-FZZ |
| Faroe Islands | See Denmark | |
| Fiji | DQ | DQ-AAA to DQ-ZZZ |
| Finland | OH | OH-AAA to OH-ZZZ OH-HAA to OH-HZZ (Helicopters) OH-XAA to OH-XZZ (Experimental aircraft) OH-LAA to OH-LZZ (Finnair) OH-001 to OH-999 and OH-1000 to OH-9999 (gliders and motor gliders) OH-G001 to OH-G999 (autogyros) OH-U001 to OH-U999 (ultralights) |
| France | F | F-AAAA to F-ZZZZ F-AYAA to F-AZZZ (Historic aircraft) F-BAAA to F-BZZZ; F-GAAA to F-HZZZ (Based in Mainland France and Corsica) F-CAAA to F-CZZZ (Gliders) F-OAAA to F-OZZZ (Based outside Mainland France and Corsica) F-PAAA to F-PZZZ (Homebuilt) F-WAAA to F-WZZZ (Test and Delivery) F-DAAA to F-DZZZ (Radio controlled Model aircraft) F-JAAA to F-JZZZ (Ultralights' radio call signs) F-ZAAA to F-ZZZZ (State owned) "department number" -AA to -ZZ & -AAA to -ZZZ (Ultralights) [e.g.: 59-ABC for the Nord département ]. |
| French Guiana | F-O | Outside mainland France is F-OAAA to F-OZZZ |
| French Polynesia | F-O | Outside mainland France is F-OAAA to F-OZZZ. |
| French West Indies | F-O | Outside mainland France is F-OAAA to F-OZZZ |
| Gabon | TR | TR-AAA to TR-ZZZ TR-KAA to TR-KZZ (Military) |
| Gambia | C5 | C5-AAA to C5-ZZZ |
| Georgia | 4L | 4L-AAA to 4L-ZZZ 4L-10000 to 4L-99999 |
| Germany | D | D-AAAA to D-AZZZ for aircraft with more than 20 t MTOW D-AUAA to D-AZZZ (test registrations) for aircraft manufactured by Airbus at Finkenwerder D-BAAA to D-BZZZ for aircraft with 14–20 t MTOW D-CAAA to D-CZZZ for aircraft with 5.7–14 t MTOW D-EAAA to D-EZZZ for single-engine aircraft up to 2 t MTOW D-FAAA to D-FZZZ for single-engine aircraft with 2–5.7 t MTOW D-GAAA to D-GZZZ for multi-engine aircraft up to 2 t MTOW D-HAAA to D-HZZZ for rotorcraft D-IAAA to D-IZZZ for multi-engine aircraft with 2–5.7 t MTOW D-KAAA to D-KZZZ for powered gliders D-LAAA to D-LZZZ for airships D-MAAA to D-MZZZ for powered ultralight aircraft D-NAAA to D-NZZZ for non-powered ultralight aircraft D-OAAA to D-OZZZ for manned free balloons D-0001 to D-9999 for gliders |
| Ghana | 9G, 9GR | 9G-AAA to 9G-ZZZ. Colonial allocation Gold Coast VP-A. 9GR-0AAA to 9GR-9ZZZ for remotely piloted aircraft |
| Gibraltar | VP-G | VP-GAA to VP-GZZ |
| Greece | SX | SX-AAA to SX-ZZZ for powered airplanes SX-H reserved for helicopters SX-U reserved for ultralights SX-101 to SX-999 for gliders |
| Greenland | See Denmark | Previously GL. |
| Grenada | J3 | J3-AAA to J3-ZZZ |
| Guatemala | TG | TG-AAA to TG-ZZZ |
| Guernsey | 2 | 2-AAAA to 2-ZZZZ. Since 2013. |
| Guinea | 3X | 3X-AAA to 3X-ZZZ. |
| Guinea-Bissau | J5 | J5-AAA to J5-ZZZ |
| Guyana | 8R | 8R-AAA to 8R-ZZZ |
| Haiti | HH | HH-AAA to HH-ZZZ |
| Honduras | HR | HR-AAA to HR-ZZZ |
| Hong Kong | B-H, B-K, B-L | B-HAA to B-HZZ B-KAA to B-KZZ B-LAA to B-LZZ |
| Hungary | HA | HA-AAA to HA-ZZZ HA-1111 to HA-9999 (Gliders, Ultralights and motor-gliders) |
| Iceland | TF | TF-AAA to TF-ZZZ TF-100 to TF-999 (Microlights) |
| India | VT | VT-AAA to VT-ZZZ |
| Indonesia | PK | PK-AAA to PK-ZZZ PK-S001 to PK-S999 (Microlights) |
| Iran | EP | EP-AAA to EP-ZZZ |
| Iraq | YI | YI-AAA to YI-ZZZ |
| Ireland | EI, EJ | EI-AAA to EI-ZZZ for normal allocation. EJ-AAAA to EJ-ZZZZ for VIP or business aircraft. |
| Isle of Man | M | M-AAAA to M-ZZZZ |
| Israel | 4X, 4Z | 4X-AAA to 4X-ZZZ |
| Italy | I | I-AAAA to I-ZZZZ I-PDVA to I-PDVZ Test registrations of Costruzioni Aeronautiche Tecnam I-EASA to I-EASZ Test registrations of various manufacturers including Tecnam and Augusta Westland I-0001 to I-Z999 (ultralights and advanced ultralights) |
| Ivory Coast | TU | TU-AAA to TU-ZZZ TU-VAA to TU-VZZ (Military) |
| Jamaica | 6Y | 6Y-AAA to 6Y-ZZZ |
| Japan | JA, JR | JA0001 to JA9999 JA001A to JA999Z JA01AA to JA99ZZ JA-AAAA to JA-ZZZZ JAA001 to JAA999 (balloons) JR0201 to JR6ZZZ Ultralight aviation (control surface control type) JR7001 to JR7ZZZ Same as above (weight transfer control type) JR8001 to JR9ZZZ Same as above (parachute type) JR9001 to JR9ZZZ Gyroplane JR0001 to JR0200 Other homebuilt aircraft |
| Jersey | ZJ | ZJ-AAA to ZJ-ZZZ |
| Jordan | JY | JY-AAA to JY-ZZZ |
| Jordan and Iraq | 4YB | International operating agency: Arab Air Cargo |
| Kazakhstan | UP | UP-AAA01 to UP-ZZZ99 (Suffix letters refer to aircraft type). Changed from UN to avoid confusion with the United Nations. |
| Kenya | 5Y | 5Y-AAA to 5Y-ZZZ |
| Kiribati | T3 | T3-AAA to T3-ZZZ |
| Kosovo | Z6 plus national emblem | Z6-AAA to Z6-ZZZ |
| Kuwait | 9K | 9K-AAA to 9K-ZZZ. |
| Kyrgyzstan | EX | EX-100 to EX-999 EX-10000 to EX-99999 |
| Laos | RDPL | RDPL-10000 to RDPL-99999 |
| Latvia | YL | YL-AAA to YL-ZZZ LV-001 to LV-Z99 Ballons & Gliders |
| Lebanon | OD | OD-AAA to OD-ZZZ |
| Lesotho | 7P | 7P-AAA to 7P-ZZZ |
| Liberia | A8 | A8-AAA to A8-ZZZ. Previously EL was cancelled by the United Nations due to illegal use. |
| Libya | 5A | 5A-AAA to 5A-ZZZ |
| Liechtenstein | HB plus national emblem | HB-AAA to HB-ZZZ. Shares allocation with Switzerland. |
| Lithuania | LY | LY-AAA to LY-ZZZ |
| Luxembourg | LX | LX-AAA to LX-ZZZ LX-BAA to LX-BZZ (balloons) LX-CAA to LX-CZZ (glider and motorglider) LX-HAA to LX-HZZ (helicopters) LX-XAA to LX-XZZ (ultralights) |
| Macau | B-M | B-MAA to B-MZZ |
| Madagascar | 5R | 5R-AAA to 5R-ZZZ |
| Malawi | 7Q | 7Q-AAA to 7Q-ZZZ |
| Malaysia | 9M | 9M-AAA to 9M-ZZZ 9M-EAA to 9M-EZZ (amateur-built) 9M-UAA to 9M-UZZ (microlight). |
| Maldives | 8Q | 8Q-AAA to 8Q-ZZZ |
| Mali | TZ | TZ-AAA to TZ-ZZZ |
| Malta | 9H | 9H-AAA to 9H-ZZZZZ 9H-111 to 9H-99999 a group of three to five characters, which characters can be a combination of capital letters in Romancharacter and/or Arabic numbers |
| Marshall Islands | V7 | V7-0001 to V7-9999 |
| Martinique | F-O | Outside mainland France is F-OAAA to F-OZZZ |
| Mauritania | 5T | 5T-AAA to 5T-ZZZ |
| Mauritius | 3B | 3B-AAA to 3B-ZZZ |
| Mexico | XA plus national emblem | XA-AAA to XA-ZZZ (Commercial) |
| Mexico | XB plus national emblem | XB-AAA to XB-ZZZ (Private) |
| Mexico | XC plus national emblem | XC-AAA to XC-ZZZ (Government) |
| Micronesia | V6 | V6-AAA to V6-ZZZ |
| Moldova | ER | ER-AAA to ER-ZZZ ER-10000 to ER-99999 |
| Monaco | 3A-M | 3A-MAA to 3A-MZZ |
| Mongolia | JU | JU-1000 to JU-9999 |
| Montenegro | 4O | 4O-AAA to 4O-ZZZ |
| Montserrat | VP-M | VP-MAA to VP-MZZ |
| Morocco | CN | CN-AAA to CN-ZZZ CNA-AA to CNA-ZZ for government & military |
| Mozambique | C9 | C9-AAA to C9-ZZZ |
| Myanmar | XY | XY-AAA to XY-ZZZ |
| Myanmar | XZ | XZ-AAA to XZ-ZZZ (Not Used) |
| Namibia | V5 | V5-AAA to V5-ZZZ |
| Nauru | C2 | C2-AAA to C2-ZZZ |
| Nepal | 9N | 9N-AAA to 9N-ZZZ (commercial aircraft) 9N-RAA to 9N-RZZ (government aircraft) |
| Netherlands | PH | PH-AAA to PH-ZZZ PH-1AA to PH-1ZZ (drones) PH-1A1 to PH-9Z9 (microlights) PH-100 to PH-9999 (gliders) |
| Netherlands Antilles | PJ | PJ-AAA to PJ-ZZZ |
| New Zealand | ZK | ZK-AAA to ZK-ZZZ ZK-A**, ZK-B**, ZK-GA*, ZK-HA* restored historical aircraft ZK-FA*, ZK-FB* balloons ZK-G** gliders ZK-H**, ZK-I** helicopters ZK-RA*, ZK-RB*, ZK-RC*, ZK-RD* gyrocopters The remainder for fixed-wing aircraft. |
| New Zealand | ZL | ZL-AAA to ZL-ZZZ |
| New Zealand | ZM | ZM-AAA to ZM-ZZZ |
| Nicaragua | YN | YN-AAA to YN-ZZZ. |
| Niger | 5U | 5U-AAA to 5U-ZZZ |
| Nigeria | 5N | 5N-AAA to 5N-ZZZ |
| North Korea | P | P-500 to P-999 |
| North Macedonia | Z3 | Z3-AAA to Z3-ZZZ Z3-HAA to Z3-HZZ (helicopters) Z3-UA-001 to Z3-UA-999 (ultralight) Z3-OAA to Z3-OZZ (hot air balloons) |
| Norway | LN | LN-AAA to LN-ZZZ Aircraft in general, except: LN-G**, Gliders LN-O**, Helicopters LN-C**, Balloons LN-Y**, Sports aircraft |
| Oman | A4O | A4O-AA to A4O-ZZ A4O-AAA to A4O-ZZZ |
| Pakistan | AP | AP-AAA to AP-ZZZ, civil aircraft, from 1947 |
| Panama | HP | HP-1000AAA to HP-9999ZZZ. The three letters (AAA–ZZZ) stand for the ICAO code of the airline, such as CMP for Copa Airlines and PST for Air Panama. |
| Papua New Guinea | P2 | P2-AAA to P2-ZZZ |
| Paraguay | ZP | ZP-AAA to ZP-ZZZ |
| Peru | OB | OB-1000 to OB-9999 Previously OB-initial-number, e.g. OB-M-1114, OB-M-1245, OB-T-1274. |
| Philippines | RP | RP-0001 to RP-9999 (Government-owned aircraft) RP-C0001 to RP-C9999 (Aircraft with complete registrations) RP-G0001 to RP-G9999 (Gliders) RP-R0001 to RP-R9999 (Limited registrations) RP-U001A to RP-U999Z (Unmanned Aerial Vehicles) RP-X0001 to RP-X9999 (Experimental certificate) RP-S0001 to RP-S9999 (Non-type certificated aircraft) |
| Poland | SP - civil | SP-AAA to SP-ZZZ SP-0*** - Motor-gliders SP-1*** to SP-3***, SP-8*** - Gliders SP-B** - Balloons SP-L** reserved for LOT Polish Airlines SP-S*** - Ultralights SP-X*** - Autogyros SP-Y** - Experimental |
| Poland | SN - government | SN-(two digits 00-99)(two letters) State-owned aircraft (public order services); Last two digits indicate type and owner. X - Helicopter, Y - Aeroplane, A - Other A - Central Institutions**, G (H,D,U*) - Border Guard, P (N,K,W*) - Police, S (F) - Fire Dept**, T - Civil Protection**, R - Govt Rescue Service**, Z (C,E,B) Customs**, M,L - other government services**, Q - trial flights** * will be used if primary letters are exhausted; ** currently unused/unseen |
| Portugal | CR, CS | CR-AAA to CR-ZZZ Aircraft registered in the overseas provinces, used until 1975 CS-AAA to CS-ZZZ Aircraft in general, except: CS-B**, Balloons CS-H**, Helicopters CS-P**, Gliders CS-T**, Airliners (used by most commercial airlines) CS-U**, Ultralight Aircraft CS-X**, Experimental |
| Qatar | A7 | A7-AAA to A7-ZZZ A7-AAA to A7-AZZ: Qatar Airways (Airbus only) A7-BAA to A7-BZZ: Qatar Airways (Boeing only) A7-HAA to A7-HZZ & A7-MAA to A7-MZZ (official use) |
| Réunion | F-O | Outside mainland France is F-OAAA to F-OZZZ |
| Romania | YR | YR-AAA to YR-ZZZ YR-1000 to YR-9999 (Gliders and ultralights). YR-D0000 to YR-D9999 (UAVs, drones). |
| Russia | RA | RA-00001 to RA-99999 (First two digits indicate aircraft type) FLA RF-00001 to FLA RF-99999 or ФЛА РФ-00001 to ФЛА РФ-99999 (Private - no longer valid) RA-0001K to RA-9999K (Ultralight - no longer valid) RA-0001G to RA-9999G (Private - aircraft without type certificate) RA-0001A to RA-9999A (Ultralight) |
| Russia | RF | RF-00001 to RF-99999 (state-owned aircraft; first two digits indicate owner). |
| Rwanda | 9XR | 9XR-AA to 9XR-ZZ |
| Saint Helena/Ascension | VQ-H | VQ-HAA to VQ-HZZ |
| Saint Kitts and Nevis | V4 | V4-AAA to V4-ZZZ |
| Saint Lucia | J6 | J6-AAA to J6-ZZZ |
| Saint Vincent and the Grenadines | J8 | J8-AAA to J8-ZZZ |
| Samoa | 5W | 5W-AAA to 5W-ZZZ, since 1961. |
| San Marino | T7 | T7-AAA to T7-ZZZZZ T7-001 to T7-99999. |
| São Tomé and Príncipe | S9 | S9-AAA to S9-ZZZ |
| Saudi Arabia | HZ | HZ-AAA to HZ-ZZZ HZ-AA1 to HZ-ZZ99 HZ-AAA1 to HZ-ZZZ99 HZ-AAAA to HZ-ZZZZ |
| Senegal | 6V plus national emblem | 6V-AAA to 6V-ZZZ |
| Senegal | 6W | |
| Serbia | YU | YU-AAA to YU-ZZZ YU-0000 to YU-9999 (Gliders) YU-A000 to YU-Z999 (Ultralight). YU-D0000 to YU-D9999 (Drone/Unmanned Aircraft). Previously Yugoslavia |
| Seychelles | S7 | S7-AAA to S7-ZZZ |
| Sierra Leone | 9L | 9L-AAA to 9L-ZZZ |
| Singapore | 9V | 9V-AAA to 9V-ZZZ |
| Slovakia | OM | OM-AAA to OM-ZZZ OM-AAAA to OM-ZZZZ (Ultralight) OM-M000 to OM-M999 (Microlights) OM-0000 to OM-9999 (Gliders) |
| Slovenia | S5 | S5-AAA to S5-9999 S5-DAA to S5-DZZ (General) S5-HAA to S5-HZZ (Helicopters) S5-PAA to S5-PZZ (Ultralights) S5-MAA to S5-MZZ (Amateur builds) S5-JAA to S5-JZZ (Gyrocopters) S5-1000 to S5-1999 (Oldtimer gliders) S5-3000 to S5-3999 (Single-seater gliders) S5-7000 to S5-7999 (Doubleseater gliders) S5-KAA to S5-KZZ (Motorgliders/sustainers) S5-OAA to S5-OZZ (Hot air balloons) |
| Solomon Islands | H4 | H4-AAA to H4-ZZZ |
| Somalia | 6O | 6O-AAA to 6O-ZZZ |
| South Africa | ZS | ZS-AAA to ZS-ZZZ (type certified aircraft) |
| South Africa | ZT | ZT-RAA to ZT-RZZ (type certified rotorcraft) and ZT-TAA to ZT-TZZ (civil RPAS) |
| South Africa | ZU | ZU-AAA to ZU-ZZZ (non-type certified aircraft). |
| South Korea | HL | HL0000 to HL0599 for glider HL0600 to HL0799 for airship HL1000 to HL1799 for piston engine HL2000 to HL2099 for piston engine HL5100 to HL5499 for turboprop HL6100 to HL6199 for piston engine helicopter HL7100 to HL7199 for single turbojet HL7200 to HL7299, HL7500 to HL7599, HL7700 to HL7799, HL8000 to HL8099, HL8200 to HL8399, HL8500 to HL8599, HL8700 to HL8799 for twin-jet aircraft HL7300 to HL7399 for tri-jet aircraft HL7400 to HL7499, HL7600 to HL7699, HL8400 to HL8499, HL8600 to HL8699 for quad-jet aircraft HL9100 to HL9699 for turboshaft helicopter HL-C000 to HL-C999 for ultralight |
| South Sudan | Z8 | Z8-AAA to Z8-ZZZ |
| Spain | EC plus national emblem | EC-AAA to EC-WZZ (Civil Aircraft) EC-YAA to EC-ZZZ (Homebuilt aircraft) EC-AA0 to EC-ZZ9 (Ultralight) EC-001 to EC-999 (Test and delivery) |
| Spain | EM | EM-AAA to EM-ZZZ (Military) |
| Sri Lanka | 4R | 4R-AAA to 4R-ZZZ |
| Sudan | ST | ST-AAA to ST-ZZZ |
| Suriname | PZ | PZ-AAA to PZ-ZZZ PZ-HAA to PZ-HZZ (helicopters) PZ-TAA to PZ-TZZ (commercial transport) PZ-UAA to PZ-UZZ (agriculture crop-dusters) |
| Sweden | SE | SE-AAA to SE-ZZZ SE-AAA to SE-CZZ (prop aircraft, general use) SE-DAA to SE-DZZ (jets) SE-EAA to SE-GZZ (prop aircraft, general use) SE-HAA to SE-HZZ (helicopters) SE-IAA to SE-IZZ (prop aircraft, general use) SE-JAA to SE-JZZ (helicopters) SE-KAA to SE-MZZ (prop aircraft, general use) SE-RAA to SE-RZZ (jets) SE-SAA to SE-UZZ (sailplanes and gliders) SE-VAA to SE-VZZ (ultralights) SE-XAA to SE-XZZ (homebuilts) SE-YAA to SE-YZZ (ultralights) SE-ZAA to SE-ZZZ (lighter than air) SE-A01 to SE-Z99 (test and delivery) |
| Switzerland | HB plus national emblem | General pattern: HB-AAA to HB-ZZZ, with HB-1 to HB-9999 for Gliders and Motorgliders. The registration often denotes the aircraft type and maker. Some examples: HB-Axx two-engined aircraft from 5.7 to 15 tons, Aircraft over 15 tons due to shortage of Jxx. HB-Bxx balloons HB-Cxx single-engined Cessnas under 5.7 tons HB-Dxx and HB-Kxx other single-engined aircraft under 5.7 tons HB-Fxx Swiss-produced aircraft like PC-6 and PC-12 HB-Ixx and HB-Jxx aircraft over 15 tons, including DC-3 HB-Nxx and HB-Pxx single-engined Pipers under 5.7 tons HB-Vxx business jets under 15 tons HB-Xxx helicopters HB-Yxx experimental aircraft HB-Zxx helicopters Also used by Liechtenstein |
| Syria | YK | YK-AAA to YK-ZZZ |
| Taiwan | B | B-00000 to B-99999 |
| Tajikistan | EY | EY-10000 to EY-99999 |
| Tanzania | 5H | 5H-AAA to 5H-ZZZ |
| Thailand | HS | HS-AAA to HS-ZZZ |
| Thailand | U | U-A00 to U-Z99. Use for ultralight aircraft. |
| Togo | 5V | 5V-AAA to 5V-ZZZ |
| Tonga | A3 | A3-AAA to A3-ZZZ |
| Trinidad and Tobago | 9Y | 9Y-AAA to 9Y-ZZZ |
| Tunisia | TS | TS-AAA to TS-ZZZ |
| Turkey | TC | TC-AAA to TC-ZZZ TC-BAA to TC-BZZ (Hot air balloons) TC-HAA to TC-HZZ (Helicopters) TC-PAA to TC-PZZ (Gliders) TC-UAA to TC-UZZ (Ultralights and microlights) TC-ZAA to TC-ZZZ (Agricultural aircraft) |
| Turkmenistan | EZ | EZ-A100 to EZ-Z999 |
| Turks and Caicos | VQ-T | VQ-TAA to VQ-TZZ |
| Tuvalu | T2 | T2-AAA to T2-ZZZ |
| Uganda | 5X | 5X-AAA to 5X-ZZZ |
| Ukraine | UR | UR-AAA to UR-ZZZ UR10000 to UR99999 UR-AAAA to UR-ZZZZ (private aircraft) |
| United Arab Emirates | A6 | A6-AAA to A6-ZZZ A6-GY1 to A6-GY9 (reserved for SkyDive Dubai / Gyrocopters) A6-SD1 to A6-SD9 (reserved for Skydive Dubai) |
| United Arab Emirates | DU | DU-001 to DU-999 (Dubai Police aircraft) |
| United Kingdom | G | G-AAAA to G-ZZZZ G-1-1 to G-99-99 (UK aircraft test serials for test & delivery purposes) |
| United Nations | 4U | 4U-AAA to 4U-ZZZ |
| United States | N | N1 to N99999 N1A to N9999Z N1AA to N999ZZ Prior to 1948 the letter 'N' was usually suffixed by one of the six following; 'C' for Commercial, 'L' for Limited, 'P' for Private, 'R' for Restricted, 'S' for State or 'X' for Experimental. |
| Uruguay | CX | CX-AAA to CX-ZZZ |
| Uzbekistan | UK | UK10000 to UK99999 |
| Vanuatu | YJ | YJ-AA1 to YJ-ZZ99 |
| Venezuela | YV | YV1000 to YV9999 YV100T to YV999T YV100E to YV999E (training) YVO100 to YVO999 (Official use) |
| Vietnam | VN | VN-1000 to VN-9999 (largely helicopters) VN-A100 to VN-A999 (jetliners) VN-B100 to VN-B999 (turboprops) VN-C100 to VN-C999 (internal combustion engine) |
| Yemen | 7O | 7O-AAA to 7O-ZZZ |
| Zambia | 9J | 9J-AAA to 9J-ZZZ |
| Zimbabwe | Z | Z-AAA to Z-ZZZ |
* ↑ Since 2022 the registration suffix may contain the numbers 2 to 9, so long as the combination contains at least one letter.
* ↑ Only C-F, C-G, C-I & CF- are allocated in Canada.
* ↑ Since 2018 the suffix may contain letters in last 2 positions. In this scheme the digit immediately after the dash indicates the type of aircraft. e.g. 2 for Boeing and 3 for Airbus.
* 1 2 3 4 5 6 Does not figure in the ICAO document "AIRCRAFT NATIONALITY MARKS, NATIONAL EMBLEMS AND COMMON MARKS".
* 1 2 3 4 5 F-O is for aircraft based outside mainland France, but aircraft may also retain mainland F-B, F-G or F-H series.
* ↑ Any combination of 3 to 5 letters and numbers permitted (except the letters "I" or "O" are not permitted when the suffix contains numbers).
* ↑ Besides the United Nations, intergovernmental organizations (IGOs) such as the European Union and NATO do not have the power to create aircraft registrations.

### Retired allocations

Some post-1928 prefixes have been retired due to various reasons, including decolonization and the dissolution of sovereign states.
| Country or region | Registration prefix | Adopted | Retired | Replaced with | Presentation and notes |
| Aden | VR-A | 1939 | 1939 | | British colonial allocation |
| Algeria | F-O | 1929 | 1962 | 7T | French colonial allocation |
| Angola | CR-L | 1929 | 1975 | D2 | Portuguese colonial allocation |
| Argentina | R | 1929 | 1932 | LV | |
| Austria | A | 1929 | 1939 | OE | |
| Bahamas | VP-B | 1929 | 1975 | C6 | British colonial allocation |
| Barbados | VQ-B | 1952 | 1968 | 8P | British colonial allocation |
| Basutoland | VQ-ZA, VQ-ZD | 1929 | 1967 | 7P | British colonial allocation |
| Bechuanaland | VQ-ZE, VQ-ZH | 1929 | 1968 | A2 | British protectorate allocation |
| Bermuda | VR-B | 1931 | | VP-B | British colonial allocation |
| Bosnia and Herzegovina | T9 | | | E7 | |
| Brunei | VR-U | 1929 | | V8 | British colonial allocation |
| Burundi | BR | 1962 | 1965 | 9U | |
| Cambodia | F-KH | 1945 | 1954 | KW | French colonial allocation |
| Cambodia | KW | 1954 | | XU | |
| Cameroon | F-O | 1929 | 1960 | TJ | French colonial allocation |
| Cameroon | VR-N | 1929 | 1958 | TJ, 5N | British colonial allocation |
| Canada | CF | 1929 | 1974 | C | |
| Cape Verde | CR-C | 1929 | | D4 | Portuguese colonial allocation |
| Cayman Islands | VR-C | 1968 | | VP-C | British colonial allocation |
| Ceylon | VP-C | 1929 | 1948 | CY | British colonial allocation |
| Ceylon | CY | 1948 | 1954 | 4R | |
| Chad | F-O | 1929 | 1960 | TT | French colonial allocation |
| China | XT | 1929 | 1949 | B | |
| Colombia | C | 1929 | 1946 | HK | C was reallocated to Canada in 1974 |
| Congo | F-O | 1929 | 1960 | TN | French colonial allocation |
| Congo | OO-C | 1929 | 1960 | 9O | Belgian colonial allocation |
| Cote D'Ivoire | F-O | 1929 | 1960 | TU | French colonial allocation |
| Cyprus | VQ-C | 1952 | 1960 | 5B | British colonial allocation |
| Czechoslovakia | OK | 1929 | 1993 | | Following dissolution, the allocation of OK went to the Czech Republic, while Slovakia was allocated the new prefix OM |
| Dahomey/Benin | F-O | 1929 | 1960 | TY | French colonial allocation |
| Danzig | YM | 1929 | 1939 | D | |
| Dutch East Indies | JZ | 1945 | | | Dutch colonial allocation |
| East Germany | DDR | 1945 | 1956 | DM | |
| East Germany | DM | 1956 | | D | |
| Estonia | ES | 1929 | 1939 | CCCP | Allocation restored following the dissolution of the Soviet Union |
| Fiji | VQ-F | 1929 | 1971 | DQ | British colonial allocation |
| Finland | K-S | 1919 | 1931 | OH | Prefix carried over from pre-1928 allocation |
| France | FC | 1940 | 1944 | F | Free France |
| Gabon | F-O | 1929 | 1960 | TR | French colonial allocation |
| Gambia | VP-X | 1929 | 1945 | | British colonial/protectorate allocation |
| Gold Coast | VP-A | 1929 | 1957 | 9G | British colonial allocation |
| Gibraltar | VR-G | 1929 | 1939 | G | British colonial allocation |
| Grenada | VQ-G | 1962 | | J3 | British colonial allocation |
| Guatemala | LG | 1936 | 1948 | TG | |
| Guiana | VP-G | 1929 | 1967 | 8R | British colonial allocation |
| Guinea | F-O | 1929 | 1958 | 3X | French colonial allocation |
| Guinea-Bissau/Guinea | CR-G | 1929 | 1975 | J5 | Portuguese colonial allocation |
| Honduras | XH | 1929 | 1960 | HR | |
| British Honduras | VP-H | 1947 | | V3 | British colonial allocation |
| Hong Kong | VR-H | 1929 | | B-H | British colonial allocation |
| India | CR-I | 1929 | 1961 | VT | Portuguese colonial allocation |
| Indochina | F-VN | 1929 | 1954 | XV | French colonial allocation |
| Iran | RV | 1929 | 1944 | EP | |
| Jamaica | VP-J | 1930 | 1964 | 6Y | British colonial allocation |
| Japan | J | 1929 | 1945 | JA, JR | Japanese aviation was temporarily banned following the end of WWII |
| Johor | VR-J | 1929 | 1963 | 9M | British protectorate allocation |
| Kampuchea | XU | 1954 | 1979 | | |
| Katanga | KA | 1961 | 1963 | 9O | Unofficial separatist allocation |
| Kenya | VP-K | 1929 | 1963 | 5Y | British colonial allocation |
| Kuwait | K | 1967 | 1968 | 9K | |
| Laos | F-L | 1945 | 1954 | XW | French colonial allocation |
| Laos | XW | 1954 | 1975 | RDPL | |
| Latvia | YL | 1929 | 1939 | CCCP | Allocation restored following the dissolution of the Soviet Union |
| Lebanon | LR | 1944 | 1954 | OD | |
| Leeward and Windward Islands | VP-L | 1929 | | V2 | British colonial allocation |
| Liberia | LI | 1929 | 1952 | EL | |
| Lithuania | LY | 1929 | 1939 | CCCP | Allocation restored following the dissolution of the Soviet Union |
| Lithuania | RY | 1929 | 1939 | CCCP | |
| Luxembourg | UL | 1929 | 1939 | LX | |
| Macau | CR-M | 1929 | | CS-M | Portuguese colonial allocation |
| Macau | CS-M | | 1999 | B-M | Portuguese colonial allocation |
| Madagascar | F-O | 1929 | 1960 | 5R | French colonial allocation |
| Malaya | VR-R | 1929 | 1963 | 9M | British colonial allocation |
| Mali | F-O | 1929 | 1960 | TZ | French colonial allocation |
| Malta | VP-M | 1929 | 1968 | 9H | British colonial allocation |
| Mauritania | F-O | 1929 | 1960 | 5T | French colonial allocation |
| Mauritius | VQ-M | 1929 | 1968 | 3B | British colonial allocation |
| Monaco | CZ | 1929 | 1949 | MC | |
| Monaco | MC | 1949 | 1959 | 3A | |
| Morocco | F-D | 1929 | 1952 | CN | French colonial allocation |
| Mozambique | CR-A | 1929 | 1975 | C9 | Portuguese colonial allocation |
| Mozambique | CR-B | 1971 | 1975 | C9 | Portuguese colonial allocation |
| New Zealand | ZM | 1929 | 1939 | ZK, ZL, ZM | Allocation later restored |
| Newfoundland | VO | 1929 | 1939 | CF | British colonial allocation |
| Nicaragua | YN | 1929 | 1936 | AN | Allocation later restored |
| Nicaragua | AN | 1939 | | YN | |
| Niger | F-O | 1929 | 1960 | 5U | French colonial allocation |
| North Borneo | VR-O | 1929 | 1963 | 9M | British colonial/protectorate allocation |
| Northern Rhodesia | VP-R | 1929 | 1953 | VP-Y | British protectorate allocation |
| Nyasaland | VP-N | 1929 | 1953 | VP-Y | British colonial allocation |
| Nyasaland | VP-Y | 1953 | 1964 | 7Q, 9J | British colonial allocation |
| Palestine | VQ-P | 1930 | 1948 | 4X | British mandatory allocation. Following the end of the British Mandate, the successor state of Israel was allocated the prefix 4X. |
| Panama | R | 1929 | 1943 | RX | |
| Panama | RX | 1943 | 1952 | HP | |
| Peru | OA | 1929 | 1950 | OB | |
| Philippines | PI | 1941 | 1975 | RP | |
| Rhodesia | VP-Y | 1929 | 1964 | 7Q, 9J | British colonial allocation |
| Rhodesia | VP-W | 1971 | | Z | British colonial allocation |
| Romania | CV | 1929 | 1936 | YR | |
| Ruanda-Urundi | OO-C | | | | Belgian colonial allocation |
| Saar Territory | TS | 1930 | 1931 | EZ | Unofficial British/French mandatory allocation |
| Saar Territory | EZ | 1929 | 1933 | SL | British/French mandatory allocation |
| Saar Territory | SL | 1947 | 1959 | D | French protectorate allocation |
| Saint Kitts and Nevis | VP-LK, VP-LL | | | V4 | British colonial allocation |
| Saint Lucia | VQ-L | 1965 | | J6 | British colonial allocation |
| Saint Vincent and the Grenadines | VP-V | 1959 | | J8 | British colonial allocation |
| Sarawak | VR-W | 1929 | | | British colonial allocation |
| Saudi Arabia | UH | 1945 | | HZ | |
| Senegal | F-O | 1929 | 1960 | 6V | French colonial allocation |
| Seychelles | VQ-S | 1929 | 1977 | S7 | British colonial allocation |
| Sierra Leone | VR-L | 1929 | 1961 | 9L | British protectorate allocation |
| Singapore | VR-S | 1929 | 1965 | 9V | British colonial allocation |
| Somalia/Somaliland | VP-S | 1929 | 1960 | 6OS | British colonial allocation |
| Somalia/Somaliland | 6OS | 1960 | 1969 | 6O | |
| South Vietnam | XV | 1959 | 1975 | | |
| Southern Rhodesia | VP-Y | 1929 | 1964 | 7Q, 9J | British colonial allocation |
| Soviet Union | CCCP | 1929 | | Multiple | |
| Spain | M | 1929 | 1933 | EC | |
| Sudan | SN | 1929 | 1953 | ST | British/Egyptian colonial allocation |
| Swaziland | VQ-ZI | 1929 | 1975 | 3D | British colonial allocation |
| Switzerland | CH | 1929 | 1936 | HB | |
| Tonga | VQ-F | 1929 | 1971 | DQ | British protectorate allocation |
| Transjordan | TJ | 1946 | 1954 | JY | British protectorate allocation |
| Trinidad and Tobago | VP-T | 1931 | 1965 | 9Y | British colonial allocation |
| Tunisia | F-O | 1929 | 1956 | TS | French colonial allocation |
| Ubangi-Shari | F-O | 1929 | 1960 | TL | French colonial allocation |
| Uganda | VP-U | 1929 | 1962 | 5X | British protectorate allocation |
| Upper Volta | F-O | 1929 | 1960 | XT | French colonial allocation |
| Vietnam | 3W | 1954 | 1959 | XV | |
| Weihaiwei | VP-W | 1929 | 1939 | | British colonial allocation |
| Western Pacific Territories | VP-P | 1929 | | H4 | British colonial allocation |
| Yemen | YE | 1955 | 1969 | 4W | |
| Yemen | 4W | 1969 | | 7O | |
| Yugoslavia | UN | 1929 | 1935 | YU | |
| Zaire | 9O | 1960 | 1966 | 9Q | |
| Zanzibar | VP-Z | 1929 | 1964 | 5H | British protectorate allocation |
* 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Colonial allocation F-O was shared between Algeria, Cameroon, Chad, Congo, Dahomey/Benin, Gabon, Guinea, Cote D'Ivoire, Madagascar, Mali, Mauritania, Niger, Senegal, Tunisia, Ubangi-Shari, and Upper Volta.
* 1 2 The prefix R was shared between Argentina and Panama. Registrations from the two countries were differentiated by the number of digits, with Panama using two digits while Argentina used three.
* ↑ Following the dissolution of the Soviet Union, the individual successor states each adopted their own aircraft registration prefix.

## Pre-1928 allocations

Note: in the suffix pattern, n represents a number, x represents a letter
| Country or region | Registration prefix | Suffix pattern | 1913 radio call letters |
| Abyssinia | A-B | A-Bxxx | |
| Afghanistan | Y-A | Y-Axxx | |
| Albania | B-A | B-Axxx | |
| Argentina | R-A | R-Axxx | LIA to LRZ |
| Australia | G-AU | G-AUxx | VHA to VKZ |
| Austria-Hungary and Bosnia-Herzegovina | | | HAA to HFZ, OGA to OMZ and UNA to UZZ |
| Belgium | O-B | O-Bxxx | ONA to OTZ |
| Bolivia | C-B | C-Bxxx | none |
| Brazil | P-B | P-Bxxx | SNA to STZ |
| Canada | G-C | G-Cxxx, except G-CYxx | VAA to VGZ (Newfoundland: VOA to VOZ) |
| Canada | G-CY (government aircraft, including military) | G-CYxx | VAA to VGZ (Newfoundland: VOA to VOZ) |
| Bulgaria | B-B | B-Bxxx | LXA to LZZ |
| Chile | B-C | B-Cxxx | COA to CPZ |
| China | X-C | X-Cxxx | none |
| Colombia | C | C-n to C-nnn | none |
| Costa Rica | TI- | TI-xxx | |
| Cuba | C-C | C-Cxxx | none |
| Czechoslovakia | L-B | L-Bxxx | |
| Danzig |
| Danzig | Y-M | Y-Mxxx | Not applicable |
| Danzig | Dz | Dz-nnn | |
| Denmark | T-D | T-Dxxx | OUA to OZZ |
| Dominica | Z-D | Z-Dxxx | |
| Dominican Republic | HI | HIxxx | |
| Ecuador | E-E | E-Exxx | |
| Egypt | | | SUA to SUZ |
| El Salvador | Y-S | Y-Sxxx | |
| Estonia | E-A | E-Axxx | |
| Finland | K-S | K-Sxxx | |
| France | F | F-xxxx | F and UAA to UMZ |
| Germany | D | D-nnnn | A, D and KAA to KCZ |
| Greece | S-X | S-Xxxx | SVA to SZZ |
| Guatemala | L-G | L-Gxxx | |
| Haiti | H-H | H-Hxxx | |
| Hejaz | A-H | A-Hxxx | |
| Honduras | X-H | X-Hxxx | |
| Hungary |
| Hungary | H-H | H-Hxxx | |
| Hungary | H-O | H-Oxxx | |
| India | G-I | G-Ixxx | VTA to VWZ |
| Italy | I | I-xxxx | I |
| Japan | J | J-xxxx | J |
| Latvia | B-L | B-Lxxx | |
| Liberia | L-L | L-Lxxx | |
| Lithuania | Z-L | Z-Lxxx | |
| Luxembourg | L-U | L-Uxxx | |
| Mexico | | | XAA to XCZ |
| Monaco | M-M | M-Mxxx | CQA to CQZ |
| Monaco | M-O | M-Oxxx | CQA to CQZ |
| Morocco | | | CNA to CNZ |
| Netherlands | H-N | H-Nxxx | PAA to PMZ |
| New Zealand | G-NZ | G-NZxx | VLA to VMZ |
| Nicaragua | A-N | A-Nxxx | |
| Norway | | | LAA to LHZ |
| Panama | S-P | S-Pxxx | |
| Persia | P-I | P-Ixxx | |
| Peru | O-P | O-Pxxx | |
| Poland | P-P | P-Pxxx | |
| Portugal | C-P | C-Pxxx | CRA to CTZ |
| Romania | C-R | C-Rxxx | CVA to CVZ |
| Russia | R-R | R-Rxxx, RR-xxx | R |
| Serbia-Croatia-Slovenia | X-S | X-Sxxx | |
| Siam | H-S | H-Sxxx | HGA to HHZ |
| South Africa | G-UA | G-UAxx | VNA to VNZ |
| Spain | M | M-xxxx | EAA to EGZ |
| Sweden | S-A | S-Axxx | SAA to SMZ |
| Switzerland | HB | HB-nnn | |
| United Kingdom | K | K-nnn | B, G and M (British colonies not autonomous: VPA to VSZ) |
| United Kingdom | G-E | G-EAxx, G-EBxx, G-EDCA | B, G and M (British colonies not autonomous: VPA to VSZ) |
| United Kingdom | G-F (lighter than air craft) | G-FAAx | B, G and M (British colonies not autonomous: VPA to VSZ) |
| United Kingdom | G-G (gliders) | G-GAAx | B, G and M (British colonies not autonomous: VPA to VSZ) |
| United States | N | N-xxxx | KDA to KZZ, N and W |
| Uruguay | C-U | C-Uxxx | CWA to CWZ |
* 1 2 3 Adopted at the ICAN meeting of 6 October 1925.'"`UNIQ--ref-0000010F-QINU`"'
* 1 2 3 Adopted at the ICAN meeting of 25 April 1927.'"`UNIQ--ref-00000111-QINU`"'
* 1 2 3 4 Adopted at the ICAN meeting of 26 June 1923.'"`UNIQ--ref-00000113-QINU`"'
* ↑ Adopted at the ICAN meeting of 14 October 1924.'"`UNIQ--ref-00000115-QINU`"'
* 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Adopted at the International Commission for Air Navigation (ICAN) meeting of 13 October 1919.'"`UNIQ--ref-00000119-QINU`"'
* ↑ Adopted at the ICAN meeting of 6 April 1925.'"`UNIQ--ref-00000120-QINU`"'
* 1 2 3 Adopted at the ICAN meeting of 28 February 1923.'"`UNIQ--ref-00000127-QINU`"'
* 1 2 3 4 The ICAN meeting of 28 February 1923 amended Ecuador's marks to E-U, Haiti's to H-E, and Uruguay's marks to C-M. They were restored to their original marks at the following meeting on 26 June.'"`UNIQ--ref-0000012C-QINU`"'
* ↑ Adopted at the ICAN meeting of 3 November 1926.'"`UNIQ--ref-0000012E-QINU`"'
* 1 2 Adopted at the ICAN meeting of 3 March 1924.'"`UNIQ--ref-00000130-QINU`"'
* 1 2 Amended at the ICAN meeting of 26 June 1923.'"`UNIQ--ref-0000013D-QINU`"'
* 1 2 Adopted at the ICAN meeting of 25 October 1922.'"`UNIQ--ref-00000141-QINU`"'
* 1 2 3 Adopted at the ICAN meeting of 13 July 1922.'"`UNIQ--ref-00000148-QINU`"'