Area Code +63-78-(6230000...6239999) located in San Mariano, 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 : 6230000 Subscriber Number To : 6239999 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 : San Mariano Timezone : Asia/Manila Coordinated Universal Time : +08:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 16.9800 Longitude : 122.0200 ‹ previous : +63-78-(6220000...6229999) next › : +63-78-(6240000...6249999) Dialling Instructions For trunk calls: 0 78 6230000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 63 78 6230000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6230000 ~ 6239999 (Count: 10,000) Example: +63-78-6230000 / 0063-78-6230000 (078-6230000 / 0-78-6230000) +63-78-6230001 / 0063-78-6230001 (078-6230001 / 0-78-6230001) +63-78-6230002 / 0063-78-6230002 (078-6230002 / 0-78-6230002) +63-78-6230003 / 0063-78-6230003 (078-6230003 / 0-78-6230003) +63-78-6230004 / 0063-78-6230004 (078-6230004 / 0-78-6230004) ...+63-78-xxxxxxx / 0063-78-xxxxxxx (078-xxxxxxx / 0-78-xxxxxxx) ...+63-78-6239995 / 0063-78-6239995 (078-6239995 / 0-78-6239995) +63-78-6239996 / 0063-78-6239996 (078-6239996 / 0-78-6239996) +63-78-6239997 / 0063-78-6239997 (078-6239997 / 0-78-6239997) +63-78-6239998 / 0063-78-6239998 (078-6239998 / 0-78-6239998) +63-78-6239999 / 0063-78-6239999 (078-6239999 / 0-78-6239999)