Area Code +81-503-(6190000...6199999) 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 : 6190000 Subscriber Number To : 6199999 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-(6180000...6189999) next › : +81-503-(6200000...6209999) Dialling Instructions For trunk calls: 0 503 6190000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6190000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6190000 ~ 6199999 (Count: 10,000) Example: +81-503-6190000 / 01081-503-6190000 (0503-6190000 / 0-503-6190000) +81-503-6190001 / 01081-503-6190001 (0503-6190001 / 0-503-6190001) +81-503-6190002 / 01081-503-6190002 (0503-6190002 / 0-503-6190002) +81-503-6190003 / 01081-503-6190003 (0503-6190003 / 0-503-6190003) +81-503-6190004 / 01081-503-6190004 (0503-6190004 / 0-503-6190004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6199995 / 01081-503-6199995 (0503-6199995 / 0-503-6199995) +81-503-6199996 / 01081-503-6199996 (0503-6199996 / 0-503-6199996) +81-503-6199997 / 01081-503-6199997 (0503-6199997 / 0-503-6199997) +81-503-6199998 / 01081-503-6199998 (0503-6199998 / 0-503-6199998) +81-503-6199999 / 01081-503-6199999 (0503-6199999 / 0-503-6199999)