Area Code +81-135-(230000...239999) 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 : 230000 Subscriber Number To : 239999 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-(220000...229999) next › : +81-135-(250000...259999) Dialling Instructions For trunk calls: 0 135 230000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 135 230000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 230000 ~ 239999 (Count: 10,000) Example: +81-135-230000 / 01081-135-230000 (0135-230000 / 0-135-230000) +81-135-230001 / 01081-135-230001 (0135-230001 / 0-135-230001) +81-135-230002 / 01081-135-230002 (0135-230002 / 0-135-230002) +81-135-230003 / 01081-135-230003 (0135-230003 / 0-135-230003) +81-135-230004 / 01081-135-230004 (0135-230004 / 0-135-230004) ...+81-135-xxxxxx / 01081-135-xxxxxx (0135-xxxxxx / 0-135-xxxxxx) ...+81-135-239995 / 01081-135-239995 (0135-239995 / 0-135-239995) +81-135-239996 / 01081-135-239996 (0135-239996 / 0-135-239996) +81-135-239997 / 01081-135-239997 (0135-239997 / 0-135-239997) +81-135-239998 / 01081-135-239998 (0135-239998 / 0-135-239998) +81-135-239999 / 01081-135-239999 (0135-239999 / 0-135-239999)