Area Code +81-503-(6330000...6339999) 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 : 6330000 Subscriber Number To : 6339999 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-(6320000...6329999) next › : +81-503-(6340000...6349999) Dialling Instructions For trunk calls: 0 503 6330000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6330000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6330000 ~ 6339999 (Count: 10,000) Example: +81-503-6330000 / 01081-503-6330000 (0503-6330000 / 0-503-6330000) +81-503-6330001 / 01081-503-6330001 (0503-6330001 / 0-503-6330001) +81-503-6330002 / 01081-503-6330002 (0503-6330002 / 0-503-6330002) +81-503-6330003 / 01081-503-6330003 (0503-6330003 / 0-503-6330003) +81-503-6330004 / 01081-503-6330004 (0503-6330004 / 0-503-6330004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6339995 / 01081-503-6339995 (0503-6339995 / 0-503-6339995) +81-503-6339996 / 01081-503-6339996 (0503-6339996 / 0-503-6339996) +81-503-6339997 / 01081-503-6339997 (0503-6339997 / 0-503-6339997) +81-503-6339998 / 01081-503-6339998 (0503-6339998 / 0-503-6339998) +81-503-6339999 / 01081-503-6339999 (0503-6339999 / 0-503-6339999)