Area Code +81-470-(630000...639999) located in Isumi (Ohara), Chiba (12), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 470 Subscriber Number From : 630000 Subscriber Number To : 639999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : NTT East Click here to buy Japan Area Code Database Other Information Language Code : ja (Japanese) Country Number : 392 (Japan) Country Code : JP (Japan) Region Code : 12 Region Name : Chiba City : Isumi (Ohara) Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 35.2500 Longitude : 140.3900 ‹ previous : +81-470-(620000...629999) next › : +81-470-(640000...649999) Dialling Instructions For trunk calls: 0 470 630000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 470 630000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 630000 ~ 639999 (Count: 10,000) Example: +81-470-630000 / 01081-470-630000 (0470-630000 / 0-470-630000) +81-470-630001 / 01081-470-630001 (0470-630001 / 0-470-630001) +81-470-630002 / 01081-470-630002 (0470-630002 / 0-470-630002) +81-470-630003 / 01081-470-630003 (0470-630003 / 0-470-630003) +81-470-630004 / 01081-470-630004 (0470-630004 / 0-470-630004) ...+81-470-xxxxxx / 01081-470-xxxxxx (0470-xxxxxx / 0-470-xxxxxx) ...+81-470-639995 / 01081-470-639995 (0470-639995 / 0-470-639995) +81-470-639996 / 01081-470-639996 (0470-639996 / 0-470-639996) +81-470-639997 / 01081-470-639997 (0470-639997 / 0-470-639997) +81-470-639998 / 01081-470-639998 (0470-639998 / 0-470-639998) +81-470-639999 / 01081-470-639999 (0470-639999 / 0-470-639999)