Area Code +81-501-(2780000...2789999) 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 : 2780000 Subscriber Number To : 2789999 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-(2770000...2779999) next › : +81-501-(2790000...2799999) Dialling Instructions For trunk calls: 0 501 2780000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 2780000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2780000 ~ 2789999 (Count: 10,000) Example: +81-501-2780000 / 01081-501-2780000 (0501-2780000 / 0-501-2780000) +81-501-2780001 / 01081-501-2780001 (0501-2780001 / 0-501-2780001) +81-501-2780002 / 01081-501-2780002 (0501-2780002 / 0-501-2780002) +81-501-2780003 / 01081-501-2780003 (0501-2780003 / 0-501-2780003) +81-501-2780004 / 01081-501-2780004 (0501-2780004 / 0-501-2780004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-2789995 / 01081-501-2789995 (0501-2789995 / 0-501-2789995) +81-501-2789996 / 01081-501-2789996 (0501-2789996 / 0-501-2789996) +81-501-2789997 / 01081-501-2789997 (0501-2789997 / 0-501-2789997) +81-501-2789998 / 01081-501-2789998 (0501-2789998 / 0-501-2789998) +81-501-2789999 / 01081-501-2789999 (0501-2789999 / 0-501-2789999)