Area Code +81-439-(900000...909999) 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 : 900000 Subscriber Number To : 909999 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 : 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-(880000...889999) next › : +81-439-(910000...919999) Dialling Instructions For trunk calls: 0 439 900000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 439 900000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 900000 ~ 909999 (Count: 10,000) Example: +81-439-900000 / 01081-439-900000 (0439-900000 / 0-439-900000) +81-439-900001 / 01081-439-900001 (0439-900001 / 0-439-900001) +81-439-900002 / 01081-439-900002 (0439-900002 / 0-439-900002) +81-439-900003 / 01081-439-900003 (0439-900003 / 0-439-900003) +81-439-900004 / 01081-439-900004 (0439-900004 / 0-439-900004) ...+81-439-xxxxxx / 01081-439-xxxxxx (0439-xxxxxx / 0-439-xxxxxx) ...+81-439-909995 / 01081-439-909995 (0439-909995 / 0-439-909995) +81-439-909996 / 01081-439-909996 (0439-909996 / 0-439-909996) +81-439-909997 / 01081-439-909997 (0439-909997 / 0-439-909997) +81-439-909998 / 01081-439-909998 (0439-909998 / 0-439-909998) +81-439-909999 / 01081-439-909999 (0439-909999 / 0-439-909999)