Area Code +81-158-(230000...239999) located in Monbetsu, Hokkaido (01), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 158 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 : Monbetsu Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 44.3600 Longitude : 143.3500 ‹ previous : +81-158-(210000...219999) next › : +81-158-(240000...249999) Dialling Instructions For trunk calls: 0 158 230000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 158 230000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 230000 ~ 239999 (Count: 10,000) Example: +81-158-230000 / 01081-158-230000 (0158-230000 / 0-158-230000) +81-158-230001 / 01081-158-230001 (0158-230001 / 0-158-230001) +81-158-230002 / 01081-158-230002 (0158-230002 / 0-158-230002) +81-158-230003 / 01081-158-230003 (0158-230003 / 0-158-230003) +81-158-230004 / 01081-158-230004 (0158-230004 / 0-158-230004) ...+81-158-xxxxxx / 01081-158-xxxxxx (0158-xxxxxx / 0-158-xxxxxx) ...+81-158-239995 / 01081-158-239995 (0158-239995 / 0-158-239995) +81-158-239996 / 01081-158-239996 (0158-239996 / 0-158-239996) +81-158-239997 / 01081-158-239997 (0158-239997 / 0-158-239997) +81-158-239998 / 01081-158-239998 (0158-239998 / 0-158-239998) +81-158-239999 / 01081-158-239999 (0158-239999 / 0-158-239999)