Area Code +81-501-(0300000...0309999) 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 : 0300000 Subscriber Number To : 0309999 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-(0290000...0299999) next › : +81-501-(0310000...0319999) Dialling Instructions For trunk calls: 0 501 0300000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 0300000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0300000 ~ 0309999 (Count: 10,000) Example: +81-501-0300000 / 01081-501-0300000 (0501-0300000 / 0-501-0300000) +81-501-0300001 / 01081-501-0300001 (0501-0300001 / 0-501-0300001) +81-501-0300002 / 01081-501-0300002 (0501-0300002 / 0-501-0300002) +81-501-0300003 / 01081-501-0300003 (0501-0300003 / 0-501-0300003) +81-501-0300004 / 01081-501-0300004 (0501-0300004 / 0-501-0300004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-0309995 / 01081-501-0309995 (0501-0309995 / 0-501-0309995) +81-501-0309996 / 01081-501-0309996 (0501-0309996 / 0-501-0309996) +81-501-0309997 / 01081-501-0309997 (0501-0309997 / 0-501-0309997) +81-501-0309998 / 01081-501-0309998 (0501-0309998 / 0-501-0309998) +81-501-0309999 / 01081-501-0309999 (0501-0309999 / 0-501-0309999)