About ZIP code 3401
The ZIP code 3401 routes mail to Diffun in the Cagayan Valley region of Philippines. Use it as the postal segment of any address in this area, and confirm unusual addresses with the local postal operator.
Philippines ยท ZIP code
3401 - Diffun
ZIP code 3401 is Diffun in Cagayan Valley, Philippines.
| ZIP code | 3401 |
| Place | Diffun |
| Region | Cagayan Valley |
| District | Province of Quirino |
| Country | Philippines (PH) |
| Coordinates | 16.59, 121.5057 (map) |