Area Code +63-78-(3970000...3979999) located in Bayombong, Nueva Vizcaya (NUV), more detail is as below. Place International Dialing Code : 63 International Prefix : 00 National Prefix : 0 National Destination Code : 78 Subscriber Number From : 3970000 Subscriber Number To : 3979999 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 : NUV Region Name : Nueva Vizcaya City : Bayombong Timezone : Asia/Manila Coordinated Universal Time : +08:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 16.4800 Longitude : 121.1500 ‹ previous : +63-78-(3960000...3969999) next › : +63-78-(4000000...4009999) Dialling Instructions For trunk calls: 0 78 3970000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 63 78 3970000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3970000 ~ 3979999 (Count: 10,000) Example: +63-78-3970000 / 0063-78-3970000 (078-3970000 / 0-78-3970000) +63-78-3970001 / 0063-78-3970001 (078-3970001 / 0-78-3970001) +63-78-3970002 / 0063-78-3970002 (078-3970002 / 0-78-3970002) +63-78-3970003 / 0063-78-3970003 (078-3970003 / 0-78-3970003) +63-78-3970004 / 0063-78-3970004 (078-3970004 / 0-78-3970004) ...+63-78-xxxxxxx / 0063-78-xxxxxxx (078-xxxxxxx / 0-78-xxxxxxx) ...+63-78-3979995 / 0063-78-3979995 (078-3979995 / 0-78-3979995) +63-78-3979996 / 0063-78-3979996 (078-3979996 / 0-78-3979996) +63-78-3979997 / 0063-78-3979997 (078-3979997 / 0-78-3979997) +63-78-3979998 / 0063-78-3979998 (078-3979998 / 0-78-3979998) +63-78-3979999 / 0063-78-3979999 (078-3979999 / 0-78-3979999)