Postal Code 3310 - San Isidro, Cagayan Valley, Philippines
Postal Code: 3310
Postal System Details
Postal Authority
Philippine Postal Corporation (PHLPost)
Postal System
Four-digit numeric postal code
Region Structure
Region → Province → City/Municipality → Barangay
Area Information
The postal code 3310 is part of the Philippines’ four-digit postal system, managed by the Philippine Postal Corporation (PHLPost), the national postal authority of Philippines. Philippine postal codes follow the pattern X X X X, such as 1 0 0 X (example only). The first digit represents the regional grouping, while the remaining digits define province, city/municipality, and barangay-level delivery zones. This code applies to San Isidro in the Cagayan Valley region, positioned near latitude 16.8709 and longitude 121.7683. Postal routing follows Region → Province → City/Municipality → Barangay. A general example: - Region: Cagayan Valley - Province: (Example: Central Provincial Area) - City/Municipality: San Isidro - Barangay: Defined by the final digit This page aligns with principles used by PHLPost. Examples shown are illustrative. For accurate delivery, ensure the city/municipality and barangay align with San Isidro, Cagayan Valley, Philippines.
Country:
Philippines
State:
Cagayan Valley
Area:
San Isidro
Postal Code:
3310
Latitude:
16.8709
Longitude:
121.7683
Frequently Asked Questions
1. What area does 3310 cover in the Philippines?
It identifies the barangay-level delivery zone within San Isidro, Cagayan Valley, under PHLPost.
2. How do postal codes work in the Philippines?
They use a four-digit system defining region, province, city/municipality, and barangay routing.
3. Can this code be used for verifying addresses?
Yes—if city/municipality and barangay match San Isidro, Cagayan Valley.
4. Which authority manages postal codes in the Philippines?
PHLPost manages all postal code assignments and routing nationwide.