Area Code +81-503-(6210000...6219999) 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 : 6210000 Subscriber Number To : 6219999 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-(6200000...6209999) next › : +81-503-(6220000...6229999) Dialling Instructions For trunk calls: 0 503 6210000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6210000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6210000 ~ 6219999 (Count: 10,000) Example: +81-503-6210000 / 01081-503-6210000 (0503-6210000 / 0-503-6210000) +81-503-6210001 / 01081-503-6210001 (0503-6210001 / 0-503-6210001) +81-503-6210002 / 01081-503-6210002 (0503-6210002 / 0-503-6210002) +81-503-6210003 / 01081-503-6210003 (0503-6210003 / 0-503-6210003) +81-503-6210004 / 01081-503-6210004 (0503-6210004 / 0-503-6210004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6219995 / 01081-503-6219995 (0503-6219995 / 0-503-6219995) +81-503-6219996 / 01081-503-6219996 (0503-6219996 / 0-503-6219996) +81-503-6219997 / 01081-503-6219997 (0503-6219997 / 0-503-6219997) +81-503-6219998 / 01081-503-6219998 (0503-6219998 / 0-503-6219998) +81-503-6219999 / 01081-503-6219999 (0503-6219999 / 0-503-6219999)