Area Code +81-503-(6370000...6379999) located in VoIP, more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 503 Subscriber Number From : 6370000 Subscriber Number To : 6379999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : V (VoIP, Location Independent fixed land line) Carrier Name : NTT Communications Click here to buy Japan Area Code Database Other Information Language Code : ja (Japanese) Country Number : 392 (Japan) Country Code : JP (Japan) City : VoIP Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 10 Latitude : None Longitude : None ‹ previous : +81-503-(6360000...6369999) next › : +81-503-(6380000...6389999) Dialling Instructions For trunk calls: 0 503 6370000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6370000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6370000 ~ 6379999 (Count: 10,000) Example: +81-503-6370000 / 01081-503-6370000 (0503-6370000 / 0-503-6370000) +81-503-6370001 / 01081-503-6370001 (0503-6370001 / 0-503-6370001) +81-503-6370002 / 01081-503-6370002 (0503-6370002 / 0-503-6370002) +81-503-6370003 / 01081-503-6370003 (0503-6370003 / 0-503-6370003) +81-503-6370004 / 01081-503-6370004 (0503-6370004 / 0-503-6370004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6379995 / 01081-503-6379995 (0503-6379995 / 0-503-6379995) +81-503-6379996 / 01081-503-6379996 (0503-6379996 / 0-503-6379996) +81-503-6379997 / 01081-503-6379997 (0503-6379997 / 0-503-6379997) +81-503-6379998 / 01081-503-6379998 (0503-6379998 / 0-503-6379998) +81-503-6379999 / 01081-503-6379999 (0503-6379999 / 0-503-6379999)
