Appendix 2 – Area, Zone and Bus Number Assignments Southwest Region Area Number 10 – Zone Number Range 100 – 199, 840-859, 1000 – 1999 Bus Number Range 10,000 – 19,999 100,000 – 199,999 Member System Bus Range Area No. Zone Area Name Member System 10 100-109 1000 - 1099 New Mexico PNM 10,000 – 10,999 100,000 – 109,999 120-139 1200 - 1399 New Mexico TSGT 12,000 – 12,999 120,000 – 129,999 LAC, NAPI, TNP 13,000 – 13,999 130,000 – 139,999 11 110 – 119 1100 - 1199 El Paso EPE 11,000 – 11,999 110,000 – 119,999 14 140-149 840-859 1400 - 1499 Arizona APS 14,000 – 14,999 84,000 – 85,999 140,000 – 149,999 150-159 1500-1599 SRP, APA 15,000 – 15,999 150,000 – 159,999 160-169 1600 - 1699 TEP, UES 16,000 – 16,999 160,000 – 169,999 170-179 1700 - 1799 AEPC, Others 17,000 – 17,999 170,000 – 179,999 18 180 – 188 1800 - 1889 Nevada NEVP 18,000 – 18,899 180,000 – 188,999 189 1899 VEA 18,900 – 18,999 189,000 – 189,999 19 190-199 1900-1999 WAPA-L.C. WAPA-L.C. 19,000-19,999 190,000-199,999 Southern California Region Area Number Range 20 – 2 Zone Number Range 200 – 299 2000 – 2999
Bus Number Range 20,000 – 29,999 94,000 – 95,999 200,000 – 299,999 Member System Bus Range Area No. Zone Range Area Name Member System 20 200 – 209 2000 - 2099 Mexico – CFE CFE 20,000 – 20,999 200,000 – 209,999 21 210 – 219 2100 – 2199 Imperial, CA IID 21,000 – 21,999 210,000 – 219,999 22 220 – 239 2200 – 2399 San Diego SDGE 22,000 – 22,999 220,000 – 229,999 Others 23,000 – 23,999 230,000 – 239,999 24 240 – 259 2400 – 2599 So Calif SCE 24,000 – 24,999 240,000 – 249,999 940 – 959 94,000 – 95,999 29,000 – 29,999 290,000 – 299,999 CDWR, MWD, Others 25,000 – 25,999 250,000 – 259,999 26 260 – 29 2600 – 299 LADWP LDWP 26,000 – 26,999 260,000 – 269,999 BURB, GLEN 27,000 – 27,999 270,000 – 279,999 Others 28,000 – 28,999 280,000 – 289,999 Northern California Region Area Number Range 30 Zone Number Range 300 – 399 3000 – 3999 Bus Number Range 30,000 – 39,999 300,000 – 399,999 Member System Bus Range Area No. Zone Range Area Name Member System 30 300 – 399 3000 – 3999 PG and E PG&E 30,000 – 36,999 300,000 – 369,999 SMUD 37,000 – 37,499 370,000 – 374,999 WAPA SNR 37,500 – 37,899
375,000 – 378,999 REU 37,900 – 37,999 379,000 – 379,999 NCPA 38,000 – 38,199 380,000 – 381,999 MID 38,200 – 38,399 382,000 – 383,999 TID 38,400 – 38,599 384,000 – 385,999 CDWR 38,600 – 38,899 386,000 – 388,999 Others 38,900 – 39,999 389,000 – 399,999 Northwest Region Area Number Range 40 Zone Number 400 – 499 4000 – 4999 Bus Number 40,000 – 49,999 90,000 – 90,999 400,000 – 499,999 Member System Bus Area No. Zone Range Area Name Member System 40 400 – 499 4000 – 4999 Northwest BPA, other Federal, WPPSS, Detailed Federal hydro 40,000 – 41,999 44,000 – 44,499 400,000 – 419,999 440,000 – 444,999 PSE 42,000 – 42,999 420,000 – 429,999 PGE 43,000 – 43,999 430,000 – 439,999 PACW 44,500 – 45,599 445,000 – 455,999 SNPD 45,600 – 45,999 456,000 – 459,999 GCPD 46,000 – 46,199 460,000 – 461,999 EWEB 46,200 – 46,399 462,000 – 463,999 SCL 46,400 – 46,599
464,000 – 465,999 TPWR 46,600 – 46,799 46,900 – 46,999 466,000 – 467,999 469,000 – 469,999 CHPD 46,800 – 46,899 468,000 – 468,999 Others – Public 47,000 – 47,499 470,000 – 474,999 Others – Private or IOU 47,500 – 47,999 475,000 – 479,999 AVA 48,000 – 49,999 480,000 – 499,999 Canadian Region Area Number 50 Zone Number Range 500 – 599 5000 – 5999 Bus Number Range 50,000 – 59,999 80,000 – 81,999 500,000 – 599,999 Member System Bus Area No. Zone Range Area Name Member System 50 500 – 519 5000 – 5199 BC Hydro BCHA 50,000 – 51,999 500,000 – 519,999 80,000 – 81,999 52 520 – 539 520 – 5399 Fortis BC FBC 52,000 – 53,999 520,000 – 539,999 54 540 – 599 5400 – 5999 Alberta AESO 54,000 – 59,999 540,000 – 599,999 Central Region Area Number Range 6069 Zone Number Range 600 – 699 6000 – 6999 Bus Number Range 60,000 – 69,999 600,000 – 699,999 Member System Bus Range Area No. Zone Range Area Name Member System
60 600 – 619 6000 – 6199 Idaho IPC 60,000 – 60,999 600,000 – 609,999 BPA, Others 61,000 – 61,999 610,000 – 619,999 62 620 – 629 6200 – 6299 Montana NWMT 62,000 – 62,999 620,000 – 629,999 63 630 – 639 6300 – 6399 WAPA UGP WAUW 63,000 – 63,999 630,000 – 639,999 64 640 – 649 6400 – 6499 Sierra SPP 64,000 – 64,999 640,000 – 649,999 65 650 – 699 6500 - 6999 Pace PACE-UT, WY, ID 65,000 – 69,999 650,000 – 699,999 Eastern Region Area Number Range 70 Zone Number Range 700 – 799 Bus Number Range 70,000 – 79,999 700,000 – 799,999 Member System Bus Range Area No. Zone Range Area Name Member System 70 700 – 729 7000 – 7299 PSColorado PSC 70,000 – 70,999 700,000 – 709,999 71,000 – 71,999 710,000 – 719,999 72,000 – 72,999 720,000 – 729,999 73 730 – 799 7300 – 7999 WAPA R.M. WALM 73,000 – 73,999 730,000 – 739,999 BHPL 74,000 – 74,999 740,000 – 749,999 PRPA 75,000 – 75,999 750,000 – 759,999 BEPC 76,000 – 76,999 760,000 – 769,999 WAUC 79,000 – 79,999 790,000 – 799,999