Area Code +81-503-(5520000...5529999) 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 : 5520000 Subscriber Number To : 5529999 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-(5510000...5519999) next › : +81-503-(5530000...5539999) Dialling Instructions For trunk calls: 0 503 5520000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 5520000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5520000 ~ 5529999 (Count: 10,000) Example: +81-503-5520000 / 01081-503-5520000 (0503-5520000 / 0-503-5520000) +81-503-5520001 / 01081-503-5520001 (0503-5520001 / 0-503-5520001) +81-503-5520002 / 01081-503-5520002 (0503-5520002 / 0-503-5520002) +81-503-5520003 / 01081-503-5520003 (0503-5520003 / 0-503-5520003) +81-503-5520004 / 01081-503-5520004 (0503-5520004 / 0-503-5520004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-5529995 / 01081-503-5529995 (0503-5529995 / 0-503-5529995) +81-503-5529996 / 01081-503-5529996 (0503-5529996 / 0-503-5529996) +81-503-5529997 / 01081-503-5529997 (0503-5529997 / 0-503-5529997) +81-503-5529998 / 01081-503-5529998 (0503-5529998 / 0-503-5529998) +81-503-5529999 / 01081-503-5529999 (0503-5529999 / 0-503-5529999)