Area Code +81-257-(170000...179999) 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 : 170000 Subscriber Number To : 179999 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 : Weather forecast 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-(160000...169999) next › : +81-257-(190000...199999) Dialling Instructions For trunk calls: 0 257 170000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 257 170000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 170000 ~ 179999 (Count: 10,000) Example: +81-257-170000 / 01081-257-170000 (0257-170000 / 0-257-170000) +81-257-170001 / 01081-257-170001 (0257-170001 / 0-257-170001) +81-257-170002 / 01081-257-170002 (0257-170002 / 0-257-170002) +81-257-170003 / 01081-257-170003 (0257-170003 / 0-257-170003) +81-257-170004 / 01081-257-170004 (0257-170004 / 0-257-170004) ...+81-257-xxxxxx / 01081-257-xxxxxx (0257-xxxxxx / 0-257-xxxxxx) ...+81-257-179995 / 01081-257-179995 (0257-179995 / 0-257-179995) +81-257-179996 / 01081-257-179996 (0257-179996 / 0-257-179996) +81-257-179997 / 01081-257-179997 (0257-179997 / 0-257-179997) +81-257-179998 / 01081-257-179998 (0257-179998 / 0-257-179998) +81-257-179999 / 01081-257-179999 (0257-179999 / 0-257-179999)