Area Code +81-439-(390000...399999) located in Kisarazu, Chiba (12), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 439 Subscriber Number From : 390000 Subscriber Number To : 399999 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 : 12 Region Name : Chiba City : Kisarazu Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 35.3800 Longitude : 139.9200 ‹ previous : +81-439-(380000...389999) next › : +81-439-(500000...509999) Dialling Instructions For trunk calls: 0 439 390000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 439 390000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 390000 ~ 399999 (Count: 10,000) Example: +81-439-390000 / 01081-439-390000 (0439-390000 / 0-439-390000) +81-439-390001 / 01081-439-390001 (0439-390001 / 0-439-390001) +81-439-390002 / 01081-439-390002 (0439-390002 / 0-439-390002) +81-439-390003 / 01081-439-390003 (0439-390003 / 0-439-390003) +81-439-390004 / 01081-439-390004 (0439-390004 / 0-439-390004) ...+81-439-xxxxxx / 01081-439-xxxxxx (0439-xxxxxx / 0-439-xxxxxx) ...+81-439-399995 / 01081-439-399995 (0439-399995 / 0-439-399995) +81-439-399996 / 01081-439-399996 (0439-399996 / 0-439-399996) +81-439-399997 / 01081-439-399997 (0439-399997 / 0-439-399997) +81-439-399998 / 01081-439-399998 (0439-399998 / 0-439-399998) +81-439-399999 / 01081-439-399999 (0439-399999 / 0-439-399999)