Area Code +81-509-(0020000...0029999) located in VoIP, more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 509 Subscriber Number From : 0020000 Subscriber Number To : 0029999 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 : DoCoMo 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 : +81-509-(0010000...0019999) next › : +81-509-(0030000...0039999) Dialling Instructions For trunk calls: 0 509 0020000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 509 0020000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0020000 ~ 0029999 (Count: 10,000) Example: +81-509-0020000 / 01081-509-0020000 (0509-0020000 / 0-509-0020000) +81-509-0020001 / 01081-509-0020001 (0509-0020001 / 0-509-0020001) +81-509-0020002 / 01081-509-0020002 (0509-0020002 / 0-509-0020002) +81-509-0020003 / 01081-509-0020003 (0509-0020003 / 0-509-0020003) +81-509-0020004 / 01081-509-0020004 (0509-0020004 / 0-509-0020004) ...+81-509-xxxxxxx / 01081-509-xxxxxxx (0509-xxxxxxx / 0-509-xxxxxxx) ...+81-509-0029995 / 01081-509-0029995 (0509-0029995 / 0-509-0029995) +81-509-0029996 / 01081-509-0029996 (0509-0029996 / 0-509-0029996) +81-509-0029997 / 01081-509-0029997 (0509-0029997 / 0-509-0029997) +81-509-0029998 / 01081-509-0029998 (0509-0029998 / 0-509-0029998) +81-509-0029999 / 01081-509-0029999 (0509-0029999 / 0-509-0029999)