Area Code +63-78-(3170000...3179999) located in Echague, 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 : 3170000 Subscriber Number To : 3179999 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 : Echague Timezone : Asia/Manila Coordinated Universal Time : +08:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 16.6700 Longitude : 121.7200 ‹ previous : +63-78-(3160000...3169999) next › : +63-78-(3180000...3189999) Dialling Instructions For trunk calls: 0 78 3170000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 63 78 3170000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3170000 ~ 3179999 (Count: 10,000) Example: +63-78-3170000 / 0063-78-3170000 (078-3170000 / 0-78-3170000) +63-78-3170001 / 0063-78-3170001 (078-3170001 / 0-78-3170001) +63-78-3170002 / 0063-78-3170002 (078-3170002 / 0-78-3170002) +63-78-3170003 / 0063-78-3170003 (078-3170003 / 0-78-3170003) +63-78-3170004 / 0063-78-3170004 (078-3170004 / 0-78-3170004) ...+63-78-xxxxxxx / 0063-78-xxxxxxx (078-xxxxxxx / 0-78-xxxxxxx) ...+63-78-3179995 / 0063-78-3179995 (078-3179995 / 0-78-3179995) +63-78-3179996 / 0063-78-3179996 (078-3179996 / 0-78-3179996) +63-78-3179997 / 0063-78-3179997 (078-3179997 / 0-78-3179997) +63-78-3179998 / 0063-78-3179998 (078-3179998 / 0-78-3179998) +63-78-3179999 / 0063-78-3179999 (078-3179999 / 0-78-3179999)