Area Code +81-503-(6620000...6629999) 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 : 6620000 Subscriber Number To : 6629999 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-(6610000...6619999) next › : +81-503-(6630000...6639999) Dialling Instructions For trunk calls: 0 503 6620000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6620000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6620000 ~ 6629999 (Count: 10,000) Example: +81-503-6620000 / 01081-503-6620000 (0503-6620000 / 0-503-6620000) +81-503-6620001 / 01081-503-6620001 (0503-6620001 / 0-503-6620001) +81-503-6620002 / 01081-503-6620002 (0503-6620002 / 0-503-6620002) +81-503-6620003 / 01081-503-6620003 (0503-6620003 / 0-503-6620003) +81-503-6620004 / 01081-503-6620004 (0503-6620004 / 0-503-6620004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6629995 / 01081-503-6629995 (0503-6629995 / 0-503-6629995) +81-503-6629996 / 01081-503-6629996 (0503-6629996 / 0-503-6629996) +81-503-6629997 / 01081-503-6629997 (0503-6629997 / 0-503-6629997) +81-503-6629998 / 01081-503-6629998 (0503-6629998 / 0-503-6629998) +81-503-6629999 / 01081-503-6629999 (0503-6629999 / 0-503-6629999)