Area Code +81-503-(0990000...0999999) 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 : 0990000 Subscriber Number To : 0999999 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 : KDDI 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-(0980000...0989999) next › : +81-503-(1000000...1009999) Dialling Instructions For trunk calls: 0 503 0990000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 0990000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0990000 ~ 0999999 (Count: 10,000) Example: +81-503-0990000 / 01081-503-0990000 (0503-0990000 / 0-503-0990000) +81-503-0990001 / 01081-503-0990001 (0503-0990001 / 0-503-0990001) +81-503-0990002 / 01081-503-0990002 (0503-0990002 / 0-503-0990002) +81-503-0990003 / 01081-503-0990003 (0503-0990003 / 0-503-0990003) +81-503-0990004 / 01081-503-0990004 (0503-0990004 / 0-503-0990004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-0999995 / 01081-503-0999995 (0503-0999995 / 0-503-0999995) +81-503-0999996 / 01081-503-0999996 (0503-0999996 / 0-503-0999996) +81-503-0999997 / 01081-503-0999997 (0503-0999997 / 0-503-0999997) +81-503-0999998 / 01081-503-0999998 (0503-0999998 / 0-503-0999998) +81-503-0999999 / 01081-503-0999999 (0503-0999999 / 0-503-0999999)