Area Code +81-501-(7310000...7319999) located in VoIP, more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 501 Subscriber Number From : 7310000 Subscriber Number To : 7319999 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 : Softbank Broadband 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 : +81-501-(7300000...7309999) next › : +81-501-(7320000...7329999) Dialling Instructions For trunk calls: 0 501 7310000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 7310000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7310000 ~ 7319999 (Count: 10,000) Example: +81-501-7310000 / 01081-501-7310000 (0501-7310000 / 0-501-7310000) +81-501-7310001 / 01081-501-7310001 (0501-7310001 / 0-501-7310001) +81-501-7310002 / 01081-501-7310002 (0501-7310002 / 0-501-7310002) +81-501-7310003 / 01081-501-7310003 (0501-7310003 / 0-501-7310003) +81-501-7310004 / 01081-501-7310004 (0501-7310004 / 0-501-7310004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-7319995 / 01081-501-7319995 (0501-7319995 / 0-501-7319995) +81-501-7319996 / 01081-501-7319996 (0501-7319996 / 0-501-7319996) +81-501-7319997 / 01081-501-7319997 (0501-7319997 / 0-501-7319997) +81-501-7319998 / 01081-501-7319998 (0501-7319998 / 0-501-7319998) +81-501-7319999 / 01081-501-7319999 (0501-7319999 / 0-501-7319999)