Area Code +81-503-(2100000...2109999) located in VoIP, more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 503 Subscriber Number From : 2100000 Subscriber Number To : 2109999 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 : KDDI 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 : +81-503-(2090000...2099999) next › : +81-503-(2110000...2119999) Dialling Instructions For trunk calls: 0 503 2100000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 2100000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2100000 ~ 2109999 (Count: 10,000) Example: +81-503-2100000 / 01081-503-2100000 (0503-2100000 / 0-503-2100000) +81-503-2100001 / 01081-503-2100001 (0503-2100001 / 0-503-2100001) +81-503-2100002 / 01081-503-2100002 (0503-2100002 / 0-503-2100002) +81-503-2100003 / 01081-503-2100003 (0503-2100003 / 0-503-2100003) +81-503-2100004 / 01081-503-2100004 (0503-2100004 / 0-503-2100004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-2109995 / 01081-503-2109995 (0503-2109995 / 0-503-2109995) +81-503-2109996 / 01081-503-2109996 (0503-2109996 / 0-503-2109996) +81-503-2109997 / 01081-503-2109997 (0503-2109997 / 0-503-2109997) +81-503-2109998 / 01081-503-2109998 (0503-2109998 / 0-503-2109998) +81-503-2109999 / 01081-503-2109999 (0503-2109999 / 0-503-2109999)