Area Code +81-503-(1310000...1319999) 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 : 1310000 Subscriber Number To : 1319999 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-(1300000...1309999) next › : +81-503-(1320000...1329999) Dialling Instructions For trunk calls: 0 503 1310000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 1310000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 1310000 ~ 1319999 (Count: 10,000) Example: +81-503-1310000 / 01081-503-1310000 (0503-1310000 / 0-503-1310000) +81-503-1310001 / 01081-503-1310001 (0503-1310001 / 0-503-1310001) +81-503-1310002 / 01081-503-1310002 (0503-1310002 / 0-503-1310002) +81-503-1310003 / 01081-503-1310003 (0503-1310003 / 0-503-1310003) +81-503-1310004 / 01081-503-1310004 (0503-1310004 / 0-503-1310004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-1319995 / 01081-503-1319995 (0503-1319995 / 0-503-1319995) +81-503-1319996 / 01081-503-1319996 (0503-1319996 / 0-503-1319996) +81-503-1319997 / 01081-503-1319997 (0503-1319997 / 0-503-1319997) +81-503-1319998 / 01081-503-1319998 (0503-1319998 / 0-503-1319998) +81-503-1319999 / 01081-503-1319999 (0503-1319999 / 0-503-1319999)