Area Code +81-503-(6250000...6259999) 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 : 6250000 Subscriber Number To : 6259999 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-(6240000...6249999) next › : +81-503-(6260000...6269999) Dialling Instructions For trunk calls: 0 503 6250000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6250000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6250000 ~ 6259999 (Count: 10,000) Example: +81-503-6250000 / 01081-503-6250000 (0503-6250000 / 0-503-6250000) +81-503-6250001 / 01081-503-6250001 (0503-6250001 / 0-503-6250001) +81-503-6250002 / 01081-503-6250002 (0503-6250002 / 0-503-6250002) +81-503-6250003 / 01081-503-6250003 (0503-6250003 / 0-503-6250003) +81-503-6250004 / 01081-503-6250004 (0503-6250004 / 0-503-6250004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6259995 / 01081-503-6259995 (0503-6259995 / 0-503-6259995) +81-503-6259996 / 01081-503-6259996 (0503-6259996 / 0-503-6259996) +81-503-6259997 / 01081-503-6259997 (0503-6259997 / 0-503-6259997) +81-503-6259998 / 01081-503-6259998 (0503-6259998 / 0-503-6259998) +81-503-6259999 / 01081-503-6259999 (0503-6259999 / 0-503-6259999)