Area Code +81-503-(0400000...0409999) 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 : 0400000 Subscriber Number To : 0409999 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-(0390000...0399999) next › : +81-503-(0410000...0419999) Dialling Instructions For trunk calls: 0 503 0400000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 0400000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0400000 ~ 0409999 (Count: 10,000) Example: +81-503-0400000 / 01081-503-0400000 (0503-0400000 / 0-503-0400000) +81-503-0400001 / 01081-503-0400001 (0503-0400001 / 0-503-0400001) +81-503-0400002 / 01081-503-0400002 (0503-0400002 / 0-503-0400002) +81-503-0400003 / 01081-503-0400003 (0503-0400003 / 0-503-0400003) +81-503-0400004 / 01081-503-0400004 (0503-0400004 / 0-503-0400004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-0409995 / 01081-503-0409995 (0503-0409995 / 0-503-0409995) +81-503-0409996 / 01081-503-0409996 (0503-0409996 / 0-503-0409996) +81-503-0409997 / 01081-503-0409997 (0503-0409997 / 0-503-0409997) +81-503-0409998 / 01081-503-0409998 (0503-0409998 / 0-503-0409998) +81-503-0409999 / 01081-503-0409999 (0503-0409999 / 0-503-0409999)