Area Code +81-501-(3820000...3829999) located in VoIP, more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 501 Subscriber Number From : 3820000 Subscriber Number To : 3829999 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 : Softbank Broadband 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 : +81-501-(3810000...3819999) next › : +81-501-(3830000...3839999) Dialling Instructions For trunk calls: 0 501 3820000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 501 3820000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3820000 ~ 3829999 (Count: 10,000) Example: +81-501-3820000 / 01081-501-3820000 (0501-3820000 / 0-501-3820000) +81-501-3820001 / 01081-501-3820001 (0501-3820001 / 0-501-3820001) +81-501-3820002 / 01081-501-3820002 (0501-3820002 / 0-501-3820002) +81-501-3820003 / 01081-501-3820003 (0501-3820003 / 0-501-3820003) +81-501-3820004 / 01081-501-3820004 (0501-3820004 / 0-501-3820004) ...+81-501-xxxxxxx / 01081-501-xxxxxxx (0501-xxxxxxx / 0-501-xxxxxxx) ...+81-501-3829995 / 01081-501-3829995 (0501-3829995 / 0-501-3829995) +81-501-3829996 / 01081-501-3829996 (0501-3829996 / 0-501-3829996) +81-501-3829997 / 01081-501-3829997 (0501-3829997 / 0-501-3829997) +81-501-3829998 / 01081-501-3829998 (0501-3829998 / 0-501-3829998) +81-501-3829999 / 01081-501-3829999 (0501-3829999 / 0-501-3829999)