Area Code +81-503-(5040000...5049999) 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 : 5040000 Subscriber Number To : 5049999 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-(5030000...5039999) next › : +81-503-(5050000...5059999) Dialling Instructions For trunk calls: 0 503 5040000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 5040000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5040000 ~ 5049999 (Count: 10,000) Example: +81-503-5040000 / 01081-503-5040000 (0503-5040000 / 0-503-5040000) +81-503-5040001 / 01081-503-5040001 (0503-5040001 / 0-503-5040001) +81-503-5040002 / 01081-503-5040002 (0503-5040002 / 0-503-5040002) +81-503-5040003 / 01081-503-5040003 (0503-5040003 / 0-503-5040003) +81-503-5040004 / 01081-503-5040004 (0503-5040004 / 0-503-5040004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-5049995 / 01081-503-5049995 (0503-5049995 / 0-503-5049995) +81-503-5049996 / 01081-503-5049996 (0503-5049996 / 0-503-5049996) +81-503-5049997 / 01081-503-5049997 (0503-5049997 / 0-503-5049997) +81-503-5049998 / 01081-503-5049998 (0503-5049998 / 0-503-5049998) +81-503-5049999 / 01081-503-5049999 (0503-5049999 / 0-503-5049999)