NINETEENTH CONGRESS OF THE ) 
REPUBLIC OF THE PHILIPPINES ) 
Third Regular Session 
)
SENATE
s. B. No. _2a23
lAl-' 20
Introduced by Senator FRANCIS G. ESCUDERO
AN ACT
MANDATING THE PHILIPPINE POSTAL CORPORATION TO ADOPT A 
MODERNIZED ZONE IMPROVEMENT PLAN CODE SYSTEM
Explanatory Note
A ZIP Code is a four-digit number that represents a specific locality. 
First introduced in the United States by the Postal Service in 1963, it was 
later adopted by the Philippine Postal Corporation (PhilPost). ZIP Codes 
significantly improved postal services by minimizing sorting and delivery 
errors caused by illegible or incomplete addresses.
Currently, PhilPost utilizes around 1,400 ZIP codes, which are 
assigned to cities and municipalities. However, large cities often have 
multiple ZIP codes, and certain institutions, such as the Ninoy AquinQ, 
International Airport (NAIA), are assigned their own unique codes.
This proposed measure aims to assign a unique ZIP code to each 
of the 42,011 barangays in the Philippines. By doing so, it seeks not only 
to enhance the delivery of mail but also to optimize the use of ZIP codes 
for providing basic services. It serves as a counterpart to House Bill No. 
11255, primarily authored and sponsored by Parahaque 1st District 
Representative Edwin L. Olivarez and llocos Norte 1st District 
Representative Ronald V. Singson.
In light of the above, the swift approval of this measure is earnestly 
sought.
FRANCIS G. ESCODERO


NINETEENTH CONGRESS OF THE 
REPUBLIC OF THE PHILIPPINES 
Third Regular Session
)
tl. -
2‘
SENATE
S. B. No. 2923
n
Introduced by Senator FRANCIS G. ESCUDERO
AN ACT
MANDATING THE PHILIPPINE POSTAL CORPORATION TO ADOPT A 
MODERNIZED ZONE IMPROVEMENT PLAN CODE SYSTEM
Be it enacted by the Senate and House of Representatives of the 
Philippines in Congress assembled:
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SECTION 1. This Act shall be known as the “Modernized ZIP Code
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System Act.”
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SEC. 2. The Philippine Postal Corporation (PHLPOST) is hereby
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mandated to adopt and institutionalize a modernized alphanumeric Zone
5 
Improvement Plan (ZIP) Code System.
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SEC. 3. The modernized alphanumeric ZIP Code shall be
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composed of two (2) alphabetic characters (A-Z), representing the
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province, and five (5) Arabic numerals (0-9), representing the city or
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municipality and barangay. Each of the current forty-two thousand and
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eleven (42,011) barangays shall be assigned a unique alphanumeric zip
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code: Provided, That the PHLPOST shall ensure that the system allows
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flexibility in accommodating the creation, division, merger, or abolition of
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a barangay, through a law or ordinance, and shall regularly coordinate
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with the Department of the Interior and Local Government and other
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concerned government agencies.
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1 
SEC. 4. Utilizing the modernized system, the PHLPOST shall
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update its website’s ZIP Code Locator that shall allow the public to search
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with ease the ZIP Code of a certain barangay and vice versa.
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SEC. 5. A transitory period of thirty-six (36) months from the
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effectivity of this Act shall be set for all national government agencies, local
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government units, government-owned or -controlled corporations, and
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private sector entities to update their database using the new ZIP Code
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System. The PHLPOST shall develop and implement, together with the
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communications offices of all government agencies, an information and
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education campaign on the modernized ZIP Code System to all sectors,
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within ninety (90) days after the effectivity of this Act.
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SEC. 6. All laws, presidential decrees or issuances, executive
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orders, letters of instruction, rules or regulations inconsistent with the
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provisions of this Act are hereby repealed or amended accordingly.
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SEC. 7. This Act shall take effect fifteen (15) days after its
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publication in the Official Gazette or in a newspaper of general circulation.
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Approved,
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