Area Code +81-135-(310000...319999) located in Yoichi, Hokkaido (01), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 135 Subscriber Number From : 310000 Subscriber Number To : 319999 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 : 01 Region Name : Hokkaido City : Yoichi Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 43.2000 Longitude : 140.7800 ‹ previous : +81-135-(300000...309999) next › : +81-135-(320000...329999) Dialling Instructions For trunk calls: 0 135 310000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 135 310000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 310000 ~ 319999 (Count: 10,000) Example: +81-135-310000 / 01081-135-310000 (0135-310000 / 0-135-310000) +81-135-310001 / 01081-135-310001 (0135-310001 / 0-135-310001) +81-135-310002 / 01081-135-310002 (0135-310002 / 0-135-310002) +81-135-310003 / 01081-135-310003 (0135-310003 / 0-135-310003) +81-135-310004 / 01081-135-310004 (0135-310004 / 0-135-310004) ...+81-135-xxxxxx / 01081-135-xxxxxx (0135-xxxxxx / 0-135-xxxxxx) ...+81-135-319995 / 01081-135-319995 (0135-319995 / 0-135-319995) +81-135-319996 / 01081-135-319996 (0135-319996 / 0-135-319996) +81-135-319997 / 01081-135-319997 (0135-319997 / 0-135-319997) +81-135-319998 / 01081-135-319998 (0135-319998 / 0-135-319998) +81-135-319999 / 01081-135-319999 (0135-319999 / 0-135-319999)