Area Code +81-501-(5120000...5129999) 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 : 5120000 Subscriber Number To : 5129999 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-(5110000...5119999) next › : +81-501-(5130000...5139999) Dialling Instructions For trunk calls: 0 501 5120000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 5120000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5120000 ~ 5129999 (Count: 10,000) Example: +81-501-5120000 / 01081-501-5120000 (0501-5120000 / 0-501-5120000) +81-501-5120001 / 01081-501-5120001 (0501-5120001 / 0-501-5120001) +81-501-5120002 / 01081-501-5120002 (0501-5120002 / 0-501-5120002) +81-501-5120003 / 01081-501-5120003 (0501-5120003 / 0-501-5120003) +81-501-5120004 / 01081-501-5120004 (0501-5120004 / 0-501-5120004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-5129995 / 01081-501-5129995 (0501-5129995 / 0-501-5129995) +81-501-5129996 / 01081-501-5129996 (0501-5129996 / 0-501-5129996) +81-501-5129997 / 01081-501-5129997 (0501-5129997 / 0-501-5129997) +81-501-5129998 / 01081-501-5129998 (0501-5129998 / 0-501-5129998) +81-501-5129999 / 01081-501-5129999 (0501-5129999 / 0-501-5129999)