Quirino Zip Codes
* 3403: Aglipay
* 3400: Cabarruguis
* 3401: Diffun
* 3404: Maddela
* 3405: Nagtipunan (Abbag)
* 3402: Saguday

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Isabela Zip Codes
* 3306: Alicia
* 3307: Angadanan
* 3316: Aurora
* 3331: Benito Soliven
* 3322: Burgos
* 3328: Cabagan
* 3315: Cabatuan
* 3305: Cauayan
* 3312: Cordon
* 3326: Delfin Albano
* 3336: Dinapigui
* 3335: Divilacan
* 3309: Echague
* 3301: Gamu
* 3300: Ilagan
* 3313: Jones
* 3304: Luna
* 3333: Maconacon
* 3323: Mallig
* 3302: Naguillan
* 3334: Palanan
* 3324: Quezon
* 3321: Quirino
* 3319: Ramon
* 3303: Reina [...]

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Ilocos Sur Zip Codes
* 2716: Alilem
* 2708: Banayoyo
* 2727: Bantay
* 2724: Burgos
* 2732: Cabugao
* 2710: Candon City
* 2702: Caoayan
* 2718: Cervantes
* 2709: Galimuyod
* 2720: Gregorio del Pilar
* 2723: Lidlidda
* 2730: Magsingal
* 2725: Nagbukel
* 2704: Narvacan
* 2721: Quirino (Angkaki)
* 2711: Salcedo (Baugen)
* 2722: San Emilio
* 2706: San Esteban
* 2728: San Ildefonso
* 2731: San Juan (Lapog)
* 2726: [...]

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