Area Code +81-501-(0000000...0009999) 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 : 0000000 Subscriber Number To : 0009999 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 : +81-499-(840000...849999) next › : +81-501-(0010000...0019999) Dialling Instructions For trunk calls: 0 501 0000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 0000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0000000 ~ 0009999 (Count: 10,000) Example: +81-501-0000000 / 01081-501-0000000 (0501-0000000 / 0-501-0000000) +81-501-0000001 / 01081-501-0000001 (0501-0000001 / 0-501-0000001) +81-501-0000002 / 01081-501-0000002 (0501-0000002 / 0-501-0000002) +81-501-0000003 / 01081-501-0000003 (0501-0000003 / 0-501-0000003) +81-501-0000004 / 01081-501-0000004 (0501-0000004 / 0-501-0000004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-0009995 / 01081-501-0009995 (0501-0009995 / 0-501-0009995) +81-501-0009996 / 01081-501-0009996 (0501-0009996 / 0-501-0009996) +81-501-0009997 / 01081-501-0009997 (0501-0009997 / 0-501-0009997) +81-501-0009998 / 01081-501-0009998 (0501-0009998 / 0-501-0009998) +81-501-0009999 / 01081-501-0009999 (0501-0009999 / 0-501-0009999)