Area Code +63-78-(3770000...3779999) located in Tuguegarao, Cagayan (CAG), more detail is as below. Place International Dialing Code : 63 International Prefix : 00 National Prefix : 0 National Destination Code : 78 Subscriber Number From : 3770000 Subscriber Number To : 3779999 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 : CAG Region Name : Cagayan City : Tuguegarao Timezone : Asia/Manila Coordinated Universal Time : +08:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 17.6100 Longitude : 121.7300 ‹ previous : +63-78-(3760000...3769999) next › : +63-78-(3780000...3789999) Dialling Instructions For trunk calls: 0 78 3770000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 63 78 3770000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3770000 ~ 3779999 (Count: 10,000) Example: +63-78-3770000 / 0063-78-3770000 (078-3770000 / 0-78-3770000) +63-78-3770001 / 0063-78-3770001 (078-3770001 / 0-78-3770001) +63-78-3770002 / 0063-78-3770002 (078-3770002 / 0-78-3770002) +63-78-3770003 / 0063-78-3770003 (078-3770003 / 0-78-3770003) +63-78-3770004 / 0063-78-3770004 (078-3770004 / 0-78-3770004) ...+63-78-xxxxxxx / 0063-78-xxxxxxx (078-xxxxxxx / 0-78-xxxxxxx) ...+63-78-3779995 / 0063-78-3779995 (078-3779995 / 0-78-3779995) +63-78-3779996 / 0063-78-3779996 (078-3779996 / 0-78-3779996) +63-78-3779997 / 0063-78-3779997 (078-3779997 / 0-78-3779997) +63-78-3779998 / 0063-78-3779998 (078-3779998 / 0-78-3779998) +63-78-3779999 / 0063-78-3779999 (078-3779999 / 0-78-3779999)