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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