Postal Code 3900 - Basco, Cagayan Valley, Philippines
Postal Code: 3900
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 3900 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 Basco in the Cagayan Valley region, positioned near latitude 20.4486 and longitude 121.9702. Postal routing follows Region → Province → City/Municipality → Barangay. A general example: - Region: Cagayan Valley - Province: (Example: Central Provincial Area) - City/Municipality: Basco - 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 Basco, Cagayan Valley, Philippines.
Country:
Philippines
State:
Cagayan Valley
Area:
Basco
Postal Code:
3900
Latitude:
20.4486
Longitude:
121.9702
Frequently Asked Questions
1. What area does 3900 cover in the Philippines?
It identifies the barangay-level delivery zone within Basco, 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 Basco, Cagayan Valley.
4. Which authority manages postal codes in the Philippines?
PHLPost manages all postal code assignments and routing nationwide.