Area Code +63-78-(8970000...8979999) located in Cauayan City, Isabela (ISA), more detail is as below. Place International Dialing Code : 63 International Prefix : 00 National Prefix : 0 National Destination Code : 78 Subscriber Number From : 8970000 Subscriber Number To : 8979999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Philippine Long Distance Telephone Company (PLDT) Click here to buy Philippines Area Code Database Other Information Language Code : en (English) Country Number : 608 (Philippines) Country Code : PH (Philippines) Region Code : ISA Region Name : Isabela City : Cauayan City Timezone : Asia/Manila Coordinated Universal Time : +08:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 16.9300 Longitude : 121.7700 ‹ previous : +63-78-(8920000...8929999) next › : +63-812-(0000000...9999999) Dialling Instructions For trunk calls: 0 78 8970000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 63 78 8970000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 8970000 ~ 8979999 (Count: 10,000) Example: +63-78-8970000 / 0063-78-8970000 (078-8970000 / 0-78-8970000) +63-78-8970001 / 0063-78-8970001 (078-8970001 / 0-78-8970001) +63-78-8970002 / 0063-78-8970002 (078-8970002 / 0-78-8970002) +63-78-8970003 / 0063-78-8970003 (078-8970003 / 0-78-8970003) +63-78-8970004 / 0063-78-8970004 (078-8970004 / 0-78-8970004) ...+63-78-xxxxxxx / 0063-78-xxxxxxx (078-xxxxxxx / 0-78-xxxxxxx) ...+63-78-8979995 / 0063-78-8979995 (078-8979995 / 0-78-8979995) +63-78-8979996 / 0063-78-8979996 (078-8979996 / 0-78-8979996) +63-78-8979997 / 0063-78-8979997 (078-8979997 / 0-78-8979997) +63-78-8979998 / 0063-78-8979998 (078-8979998 / 0-78-8979998) +63-78-8979999 / 0063-78-8979999 (078-8979999 / 0-78-8979999)