29 — 23 codes dans 23 localités (Philippines).
| Code postal | Localité / Quartier | Zone administrative | Coordonnées |
|---|---|---|---|
| Laoag City | Province of Ilocos Norte · Ilocos | 18.1978, 120.5957 | |
| San Nicolas | Province of Ilocos Norte · Ilocos | 18.1725, 120.5953 | |
| Paoay | Province of Ilocos Norte · Ilocos | 18.0616, 120.5221 | |
| Currimao | Province of Ilocos Norte · Ilocos | 18.0182, 120.4876 | |
| Badoc | Province of Ilocos Norte · Ilocos | 17.9265, 120.4764 | |
| Pinili | Province of Ilocos Norte · Ilocos | 17.9517, 120.5278 | |
| Batac | Province of Ilocos Norte · Ilocos | 18.0371, 120.5699 | |
| Marcos | Province of Ilocos Norte · Ilocos | 18.052, 120.6898 | |
| Banna (formerly Espiritu) | Province of Ilocos Norte · Ilocos | 18.0371, 120.5699 | |
| Nueva Era | Province of Ilocos Norte · Ilocos | 17.9163, 120.6641 | |
| Solsona | Province of Ilocos Norte · Ilocos | 18.0933, 120.7697 | |
| Carasi | Province of Ilocos Norte · Ilocos | 18.1989, 120.8683 | |
| Piddig | Province of Ilocos Norte · Ilocos | 18.1655, 120.7175 | |
| Dingras | Province of Ilocos Norte · Ilocos | 18.1032, 120.6967 | |
| Sarrat | Province of Ilocos Norte · Ilocos | 18.1574, 120.647 | |
| Vintar | Province of Ilocos Norte · Ilocos | 18.2284, 120.6475 | |
| Bacarra | Province of Ilocos Norte · Ilocos | 18.2529, 120.6125 | |
| Pasuquin | Province of Ilocos Norte · Ilocos | 18.3328, 120.6177 | |
| Burgos | Province of Ilocos Norte · Ilocos | 18.5166, 120.6449 | |
| Pagudpud | Province of Ilocos Norte · Ilocos | 18.5616, 120.7868 | |
| Bangui | Province of Ilocos Norte · Ilocos | 18.5376, 120.7671 | |
| Dumalneg | Province of Ilocos Norte · Ilocos | 18.4947, 120.8619 | |
| Adams | Province of Ilocos Norte · Ilocos | 18.4667, 120.9 |