Area Code +81-257-(220000...229999) located in Kashiwazaki, 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 : 220000 Subscriber Number To : 229999 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 : 15 Region Name : Niigata City : Kashiwazaki Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 37.3700 Longitude : 138.5600 ‹ previous : +81-257-(210000...219999) next › : +81-257-(230000...239999) Dialling Instructions For trunk calls: 0 257 220000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 257 220000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 220000 ~ 229999 (Count: 10,000) Example: +81-257-220000 / 01081-257-220000 (0257-220000 / 0-257-220000) +81-257-220001 / 01081-257-220001 (0257-220001 / 0-257-220001) +81-257-220002 / 01081-257-220002 (0257-220002 / 0-257-220002) +81-257-220003 / 01081-257-220003 (0257-220003 / 0-257-220003) +81-257-220004 / 01081-257-220004 (0257-220004 / 0-257-220004) ...+81-257-xxxxxx / 01081-257-xxxxxx (0257-xxxxxx / 0-257-xxxxxx) ...+81-257-229995 / 01081-257-229995 (0257-229995 / 0-257-229995) +81-257-229996 / 01081-257-229996 (0257-229996 / 0-257-229996) +81-257-229997 / 01081-257-229997 (0257-229997 / 0-257-229997) +81-257-229998 / 01081-257-229998 (0257-229998 / 0-257-229998) +81-257-229999 / 01081-257-229999 (0257-229999 / 0-257-229999)