Area Code +81-503-(6020000...6029999) 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 : 6020000 Subscriber Number To : 6029999 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 : NTT Communications 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-(6010000...6019999) next › : +81-503-(6030000...6039999) Dialling Instructions For trunk calls: 0 503 6020000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6020000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6020000 ~ 6029999 (Count: 10,000) Example: +81-503-6020000 / 01081-503-6020000 (0503-6020000 / 0-503-6020000) +81-503-6020001 / 01081-503-6020001 (0503-6020001 / 0-503-6020001) +81-503-6020002 / 01081-503-6020002 (0503-6020002 / 0-503-6020002) +81-503-6020003 / 01081-503-6020003 (0503-6020003 / 0-503-6020003) +81-503-6020004 / 01081-503-6020004 (0503-6020004 / 0-503-6020004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6029995 / 01081-503-6029995 (0503-6029995 / 0-503-6029995) +81-503-6029996 / 01081-503-6029996 (0503-6029996 / 0-503-6029996) +81-503-6029997 / 01081-503-6029997 (0503-6029997 / 0-503-6029997) +81-503-6029998 / 01081-503-6029998 (0503-6029998 / 0-503-6029998) +81-503-6029999 / 01081-503-6029999 (0503-6029999 / 0-503-6029999)