Area Code +81-503-(0440000...0449999) 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 : 0440000 Subscriber Number To : 0449999 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 : KDDI 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-(0430000...0439999) next › : +81-503-(0450000...0459999) Dialling Instructions For trunk calls: 0 503 0440000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 0440000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0440000 ~ 0449999 (Count: 10,000) Example: +81-503-0440000 / 01081-503-0440000 (0503-0440000 / 0-503-0440000) +81-503-0440001 / 01081-503-0440001 (0503-0440001 / 0-503-0440001) +81-503-0440002 / 01081-503-0440002 (0503-0440002 / 0-503-0440002) +81-503-0440003 / 01081-503-0440003 (0503-0440003 / 0-503-0440003) +81-503-0440004 / 01081-503-0440004 (0503-0440004 / 0-503-0440004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-0449995 / 01081-503-0449995 (0503-0449995 / 0-503-0449995) +81-503-0449996 / 01081-503-0449996 (0503-0449996 / 0-503-0449996) +81-503-0449997 / 01081-503-0449997 (0503-0449997 / 0-503-0449997) +81-503-0449998 / 01081-503-0449998 (0503-0449998 / 0-503-0449998) +81-503-0449999 / 01081-503-0449999 (0503-0449999 / 0-503-0449999)