Area Code +81-123-(310000...319999) located in Chitose, Hokkaido (01), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 123 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 : KDDI 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 : Chitose Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 42.8200 Longitude : 141.6500 ‹ previous : +81-123-(290000...299999) next › : +81-123-(320000...329999) Dialling Instructions For trunk calls: 0 123 310000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 123 310000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 310000 ~ 319999 (Count: 10,000) Example: +81-123-310000 / 01081-123-310000 (0123-310000 / 0-123-310000) +81-123-310001 / 01081-123-310001 (0123-310001 / 0-123-310001) +81-123-310002 / 01081-123-310002 (0123-310002 / 0-123-310002) +81-123-310003 / 01081-123-310003 (0123-310003 / 0-123-310003) +81-123-310004 / 01081-123-310004 (0123-310004 / 0-123-310004) ...+81-123-xxxxxx / 01081-123-xxxxxx (0123-xxxxxx / 0-123-xxxxxx) ...+81-123-319995 / 01081-123-319995 (0123-319995 / 0-123-319995) +81-123-319996 / 01081-123-319996 (0123-319996 / 0-123-319996) +81-123-319997 / 01081-123-319997 (0123-319997 / 0-123-319997) +81-123-319998 / 01081-123-319998 (0123-319998 / 0-123-319998) +81-123-319999 / 01081-123-319999 (0123-319999 / 0-123-319999)