Area Code +81-503-(4090000...4099999) 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 : 4090000 Subscriber Number To : 4099999 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-(4080000...4089999) next › : +81-503-(4100000...4109999) Dialling Instructions For trunk calls: 0 503 4090000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 4090000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4090000 ~ 4099999 (Count: 10,000) Example: +81-503-4090000 / 01081-503-4090000 (0503-4090000 / 0-503-4090000) +81-503-4090001 / 01081-503-4090001 (0503-4090001 / 0-503-4090001) +81-503-4090002 / 01081-503-4090002 (0503-4090002 / 0-503-4090002) +81-503-4090003 / 01081-503-4090003 (0503-4090003 / 0-503-4090003) +81-503-4090004 / 01081-503-4090004 (0503-4090004 / 0-503-4090004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-4099995 / 01081-503-4099995 (0503-4099995 / 0-503-4099995) +81-503-4099996 / 01081-503-4099996 (0503-4099996 / 0-503-4099996) +81-503-4099997 / 01081-503-4099997 (0503-4099997 / 0-503-4099997) +81-503-4099998 / 01081-503-4099998 (0503-4099998 / 0-503-4099998) +81-503-4099999 / 01081-503-4099999 (0503-4099999 / 0-503-4099999)