Republic of the Philippines 
HOUSE OF REPRESENTATIVES 
Quezon City 
TWENTIETH CONGRESS 
First Regular Session 
House Bill No. _____ 
 ______________________________________________________________________ 
Introduced by REP. RONALD V. SINGSON 
______________________________________________________________________ 
EXPLANATORY NOTE 
Postal administration is a contributing agent to a country’s Gross Domestic Products. 
In the United States, the use of Zone Improvement Plan (ZIP) codes was adopted in 1963, and 
subsequently enhanced in 1983, in order to make it easier for the ubiquitous postman to deliver 
a letter.  
Shipping and logistics companies use zip codes to optimize their delivery routes and 
ensure that packages are delivered in a timely and cost-effective manner. Healthcare providers 
can use zip codes to identify areas where there are high concentrations of people with specific 
health conditions. This information can be used to develop targeted healthcare initiatives and 
improve healthcare outcomes. Moreover, emergency responders can use zip codes to quickly 
identify the location of an emergency and dispatch appropriate resources. This can save 
valuable time in emergency situations and help ensure a more effective response. 
In the Philippines, the use of postal code was initially prescribed in Letter of 
Instructions No. 605, issued on September 29, 1977. Nonetheless, LOI 605 does not mandate 
its usage.  
The country currently uses a 4-digit zip code system for more than 42,000 barangays 
all over the Philippines. This system, however, fails to provide a code that is unique to each 
barangay. 
Recent developments have emphasized the importance of using zip codes. Thus, this 
measure proposes to mandate the Philippine Postal Corporation to institutionalize the usage of 
zip code and adopt a modernized alphanumeric zip code system.  
In view of the foregoing considerations, the early approval of this bill is earnestly 
sought. 
RONALD V. SINGSON 
July 3, 2025
8:00 am
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Republic of the Philippines 
HOUSE OF REPRESENTATIVES 
Quezon City 
TWENTIETH CONGRESS 
First Regular Session 
House Bill No. _____ 
 ______________________________________________________________________ 
Introduced by REP. RONALD V. SINGSON 
______________________________________________________________________ 
AN ACT MANDATING THE PHILIPPINE POSTAL CORPORATION 
(PHILPOST) TO ADOPT A MODERNIZED ZONE IMPROVEMENT PLAN 
CODE SYSTEM 
Be enacted by the Senate and the House of Representatives of the Philippines in Congress 
assembled: 
SECTION 1. This Act shall be known as the “Modernized ZIP Code System Act”. 
SEC. 2. The Philippine Postal Corporation (PHLPOST) is hereby mandated to adopt 
and institutionalize a modernized alphanumeric Zone Improvement Plan (ZIP) Code System. 
SEC. 3. The modernized alphanumeric zip code shall be composed of: two (2) 
alphabetic characters (A-Z), representing the province; and five (5) Arabic numerals (0-9), 
representing the city or municipality and barangay. Each of the current forty-two thousand and 
eleven (42,011) barangays shall 10 be assigned a unique alphanumeric zip code: Provided, 
That the PHLPOST shall ensure that the system allows flexibility in accommodating the 
creation, division, merger, or abolition of a barangay, through a law or ordinance, and shall 
regularly coordinate with the Department of the Interior and Local Government and other 
concerned government agencies. 
SEC. 4. Utilizing a modernized system, the PHLPOST shall update its website’s ZIP 
Code Locator that shall allow the public to search with ease the ZIP code of a certain barangay 
and vice versa.  
SEC. 5. A transitory period of thirty-six (36) months from the effectivity of this Act 
shall be set for all national government agencies, local government units, GOCCs, government 
financial institutions, and all private sector entities to update their database pursuant to the new 
zip code system. The PHLPOST shall develop and implement, together with the 
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communications offices of all government agencies, an information and education campaign 
on the modernized ZIP Code System to all sectors, within ninety (90) days after the effectivity 
of this Act. 
 
SEC. 6.  All laws, presidential decrees or issuances, executive orders, letters of 
instruction, rules or regulations inconsistent with the provisions of this Act are hereby repealed 
or amended accordingly.  
 
SEC. 7. This Act shall take effect after fifteen (15) days from complete publication in 
the Official Gazette or in a newspaper of general circulation.  
 
Approved,