Area Code +63-78-(3910000...3919999) located in Ilagan 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 : 3910000 Subscriber Number To : 3919999 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 : Ilagan City Timezone : Asia/Manila Coordinated Universal Time : +08:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 17.1200 Longitude : 122.0100 ‹ previous : +63-78-(3900000...3909999) next › : +63-78-(3920000...3929999) Dialling Instructions For trunk calls: 0 78 3910000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 63 78 3910000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3910000 ~ 3919999 (Count: 10,000) Example: +63-78-3910000 / 0063-78-3910000 (078-3910000 / 0-78-3910000) +63-78-3910001 / 0063-78-3910001 (078-3910001 / 0-78-3910001) +63-78-3910002 / 0063-78-3910002 (078-3910002 / 0-78-3910002) +63-78-3910003 / 0063-78-3910003 (078-3910003 / 0-78-3910003) +63-78-3910004 / 0063-78-3910004 (078-3910004 / 0-78-3910004) ...+63-78-xxxxxxx / 0063-78-xxxxxxx (078-xxxxxxx / 0-78-xxxxxxx) ...+63-78-3919995 / 0063-78-3919995 (078-3919995 / 0-78-3919995) +63-78-3919996 / 0063-78-3919996 (078-3919996 / 0-78-3919996) +63-78-3919997 / 0063-78-3919997 (078-3919997 / 0-78-3919997) +63-78-3919998 / 0063-78-3919998 (078-3919998 / 0-78-3919998) +63-78-3919999 / 0063-78-3919999 (078-3919999 / 0-78-3919999)