Area Code +81-503-(5320000...5329999) 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 : 5320000 Subscriber Number To : 5329999 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-(5310000...5319999) next › : +81-503-(5330000...5339999) Dialling Instructions For trunk calls: 0 503 5320000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 5320000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5320000 ~ 5329999 (Count: 10,000) Example: +81-503-5320000 / 01081-503-5320000 (0503-5320000 / 0-503-5320000) +81-503-5320001 / 01081-503-5320001 (0503-5320001 / 0-503-5320001) +81-503-5320002 / 01081-503-5320002 (0503-5320002 / 0-503-5320002) +81-503-5320003 / 01081-503-5320003 (0503-5320003 / 0-503-5320003) +81-503-5320004 / 01081-503-5320004 (0503-5320004 / 0-503-5320004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-5329995 / 01081-503-5329995 (0503-5329995 / 0-503-5329995) +81-503-5329996 / 01081-503-5329996 (0503-5329996 / 0-503-5329996) +81-503-5329997 / 01081-503-5329997 (0503-5329997 / 0-503-5329997) +81-503-5329998 / 01081-503-5329998 (0503-5329998 / 0-503-5329998) +81-503-5329999 / 01081-503-5329999 (0503-5329999 / 0-503-5329999)