| Municipalities |
|---|
| Postal/ZIP Codes in Solana, Cagayan |
| Postal/ZIP Codes in Tuao, Cagayan |
| Postal/ZIP Codes in Tuguegarao, Cagayan |
| Postal/ZIP Codes in Cagayan Valley |
|---|
| Postal/ZIP Codes in Batanes |
| Postal/ZIP Codes in Cagayan |
| Postal/ZIP Codes in Isabela |
| Postal/ZIP Codes in Nueva Vizcaya |
| Postal/ZIP Codes in Quirino |