| Location | Zip Code | Area Code |
| Alicia | 3306 | 78 |
| Angadanan | 3307 | 78 |
| Aurora | 3316 | 78 |
| Benito Soliven | 3331 | 78 |
| Burgos | 3322 | 78 |
| Cabagan | 3328 | 78 |
| Cabatuan | 3315 | 78 |
| City of Cauayan | 3305 | 78 |
| City of Ilagan | 3300 | 78 |
| Cordon | 3312 | 78 |
| Delfin Albano | 3326 | 78 |
| Dinapigue | 3336 | 78 |
| Divilacan | 3335 | 78 |
| Echague | 3309 | 78 |
| Gamu | 3301 | 78 |
| Jones | 3313 | 78 |
| Luna | 3304 | 78 |
| Maconacon | 3333 | 78 |
| Mallig | 3323 | 78 |
| Naguillan | 3302 | 78 |
| Palanan | 3334 | 78 |
| Quezon | 3324 | 78 |
| Quirino | 3321 | 78 |
| Ramon | 3319 | 78 |
| Reina Mercedes | 3303 | 78 |
| Roxas | 3320 | 78 |
| San Agustin | 3314 | 78 |
| San Guillermo | 3308 | 78 |
| San Isidro | 3310 | 78 |
| San Manuel | 3317 | 78 |
| San Mariano | 3332 | 78 |
| San Mateo | 3318 | 78 |
| San Pablo | 3329 | 78 |
| Santiago CIty | 3311 | 78 |
| Sta. Maria | 3330 | 78 |
| Sto. Tomas | 3327 | 78 |
| Tumauini | 3325 | 78 |
About Isabela
Isabela is known as three things: the Queen Province of the Philippines, Rice Bowl of the North, and the Top Corn Producer of the Philippines. The province treats its visitors with the savory Pancit Cabagan, Longganisa, and their fresh Corn. The Bambanti Festival also invites people from different places.
Isabela was carved from Cagayan and Nueva Vizcaya when a Royal Decree was proclaimed in the 1850s. Found in Isabela is the human-made Ilagan Japanese Tunnel. This served as a storage for treasures and weapons and as a prison during the war.
Notable figures from Isabela are UAAP Basketball player Ricci Rivero, Folk Musician Freddie Aguilar, television personality Luane Dy, actress Sheena Catacutan, and PBA Basketball player Mark Clemence Telan.
Official website: provinceofisabela.ph