Area Code +81-257-(130000...139999) located in Minamiuonuma (Muikamachi), Niigata (15), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 257 Subscriber Number From : 130000 Subscriber Number To : 139999 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 : Fusion Communications Click here to buy Japan Area Code Database Other Information Language Code : ja (Japanese) Country Number : 392 (Japan) Country Code : JP (Japan) Region Code : 15 Region Name : Niigata City : Minamiuonuma (Muikamachi) Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 37.1600 Longitude : 138.9300 ‹ previous : +81-257-(110000...119999) next › : +81-257-(160000...169999) Dialling Instructions For trunk calls: 0 257 130000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 257 130000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 130000 ~ 139999 (Count: 10,000) Example: +81-257-130000 / 01081-257-130000 (0257-130000 / 0-257-130000) +81-257-130001 / 01081-257-130001 (0257-130001 / 0-257-130001) +81-257-130002 / 01081-257-130002 (0257-130002 / 0-257-130002) +81-257-130003 / 01081-257-130003 (0257-130003 / 0-257-130003) +81-257-130004 / 01081-257-130004 (0257-130004 / 0-257-130004) ...+81-257-xxxxxx / 01081-257-xxxxxx (0257-xxxxxx / 0-257-xxxxxx) ...+81-257-139995 / 01081-257-139995 (0257-139995 / 0-257-139995) +81-257-139996 / 01081-257-139996 (0257-139996 / 0-257-139996) +81-257-139997 / 01081-257-139997 (0257-139997 / 0-257-139997) +81-257-139998 / 01081-257-139998 (0257-139998 / 0-257-139998) +81-257-139999 / 01081-257-139999 (0257-139999 / 0-257-139999)