Area Code +81-501-(2830000...2839999) 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 : 2830000 Subscriber Number To : 2839999 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-(2820000...2829999) next › : +81-501-(2840000...2849999) Dialling Instructions For trunk calls: 0 501 2830000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 2830000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2830000 ~ 2839999 (Count: 10,000) Example: +81-501-2830000 / 01081-501-2830000 (0501-2830000 / 0-501-2830000) +81-501-2830001 / 01081-501-2830001 (0501-2830001 / 0-501-2830001) +81-501-2830002 / 01081-501-2830002 (0501-2830002 / 0-501-2830002) +81-501-2830003 / 01081-501-2830003 (0501-2830003 / 0-501-2830003) +81-501-2830004 / 01081-501-2830004 (0501-2830004 / 0-501-2830004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-2839995 / 01081-501-2839995 (0501-2839995 / 0-501-2839995) +81-501-2839996 / 01081-501-2839996 (0501-2839996 / 0-501-2839996) +81-501-2839997 / 01081-501-2839997 (0501-2839997 / 0-501-2839997) +81-501-2839998 / 01081-501-2839998 (0501-2839998 / 0-501-2839998) +81-501-2839999 / 01081-501-2839999 (0501-2839999 / 0-501-2839999)