Area Code +81-503-(3960000...3969999) 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 : 3960000 Subscriber Number To : 3969999 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-(3950000...3959999) next › : +81-503-(3970000...3979999) Dialling Instructions For trunk calls: 0 503 3960000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 3960000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3960000 ~ 3969999 (Count: 10,000) Example: +81-503-3960000 / 01081-503-3960000 (0503-3960000 / 0-503-3960000) +81-503-3960001 / 01081-503-3960001 (0503-3960001 / 0-503-3960001) +81-503-3960002 / 01081-503-3960002 (0503-3960002 / 0-503-3960002) +81-503-3960003 / 01081-503-3960003 (0503-3960003 / 0-503-3960003) +81-503-3960004 / 01081-503-3960004 (0503-3960004 / 0-503-3960004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-3969995 / 01081-503-3969995 (0503-3969995 / 0-503-3969995) +81-503-3969996 / 01081-503-3969996 (0503-3969996 / 0-503-3969996) +81-503-3969997 / 01081-503-3969997 (0503-3969997 / 0-503-3969997) +81-503-3969998 / 01081-503-3969998 (0503-3969998 / 0-503-3969998) +81-503-3969999 / 01081-503-3969999 (0503-3969999 / 0-503-3969999)