Area Code +81-501-(6580000...6589999) 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 : 6580000 Subscriber Number To : 6589999 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-(6570000...6579999) next › : +81-501-(6590000...6599999) Dialling Instructions For trunk calls: 0 501 6580000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 6580000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6580000 ~ 6589999 (Count: 10,000) Example: +81-501-6580000 / 01081-501-6580000 (0501-6580000 / 0-501-6580000) +81-501-6580001 / 01081-501-6580001 (0501-6580001 / 0-501-6580001) +81-501-6580002 / 01081-501-6580002 (0501-6580002 / 0-501-6580002) +81-501-6580003 / 01081-501-6580003 (0501-6580003 / 0-501-6580003) +81-501-6580004 / 01081-501-6580004 (0501-6580004 / 0-501-6580004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-6589995 / 01081-501-6589995 (0501-6589995 / 0-501-6589995) +81-501-6589996 / 01081-501-6589996 (0501-6589996 / 0-501-6589996) +81-501-6589997 / 01081-501-6589997 (0501-6589997 / 0-501-6589997) +81-501-6589998 / 01081-501-6589998 (0501-6589998 / 0-501-6589998) +81-501-6589999 / 01081-501-6589999 (0501-6589999 / 0-501-6589999)