Area Code +81-503-(4330000...4339999) 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 : 4330000 Subscriber Number To : 4339999 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-(4320000...4329999) next › : +81-503-(4340000...4349999) Dialling Instructions For trunk calls: 0 503 4330000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 4330000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4330000 ~ 4339999 (Count: 10,000) Example: +81-503-4330000 / 01081-503-4330000 (0503-4330000 / 0-503-4330000) +81-503-4330001 / 01081-503-4330001 (0503-4330001 / 0-503-4330001) +81-503-4330002 / 01081-503-4330002 (0503-4330002 / 0-503-4330002) +81-503-4330003 / 01081-503-4330003 (0503-4330003 / 0-503-4330003) +81-503-4330004 / 01081-503-4330004 (0503-4330004 / 0-503-4330004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-4339995 / 01081-503-4339995 (0503-4339995 / 0-503-4339995) +81-503-4339996 / 01081-503-4339996 (0503-4339996 / 0-503-4339996) +81-503-4339997 / 01081-503-4339997 (0503-4339997 / 0-503-4339997) +81-503-4339998 / 01081-503-4339998 (0503-4339998 / 0-503-4339998) +81-503-4339999 / 01081-503-4339999 (0503-4339999 / 0-503-4339999)