Area Code +81-501-(5530000...5539999) 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 : 5530000 Subscriber Number To : 5539999 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-(5520000...5529999) next › : +81-501-(5540000...5549999) Dialling Instructions For trunk calls: 0 501 5530000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 5530000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5530000 ~ 5539999 (Count: 10,000) Example: +81-501-5530000 / 01081-501-5530000 (0501-5530000 / 0-501-5530000) +81-501-5530001 / 01081-501-5530001 (0501-5530001 / 0-501-5530001) +81-501-5530002 / 01081-501-5530002 (0501-5530002 / 0-501-5530002) +81-501-5530003 / 01081-501-5530003 (0501-5530003 / 0-501-5530003) +81-501-5530004 / 01081-501-5530004 (0501-5530004 / 0-501-5530004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-5539995 / 01081-501-5539995 (0501-5539995 / 0-501-5539995) +81-501-5539996 / 01081-501-5539996 (0501-5539996 / 0-501-5539996) +81-501-5539997 / 01081-501-5539997 (0501-5539997 / 0-501-5539997) +81-501-5539998 / 01081-501-5539998 (0501-5539998 / 0-501-5539998) +81-501-5539999 / 01081-501-5539999 (0501-5539999 / 0-501-5539999)