Area Code +81-439-(870000...879999) 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 : 870000 Subscriber Number To : 879999 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-(800000...809999) next › : +81-439-(880000...889999) Dialling Instructions For trunk calls: 0 439 870000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 439 870000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 870000 ~ 879999 (Count: 10,000) Example: +81-439-870000 / 01081-439-870000 (0439-870000 / 0-439-870000) +81-439-870001 / 01081-439-870001 (0439-870001 / 0-439-870001) +81-439-870002 / 01081-439-870002 (0439-870002 / 0-439-870002) +81-439-870003 / 01081-439-870003 (0439-870003 / 0-439-870003) +81-439-870004 / 01081-439-870004 (0439-870004 / 0-439-870004) ...+81-439-xxxxxx / 01081-439-xxxxxx (0439-xxxxxx / 0-439-xxxxxx) ...+81-439-879995 / 01081-439-879995 (0439-879995 / 0-439-879995) +81-439-879996 / 01081-439-879996 (0439-879996 / 0-439-879996) +81-439-879997 / 01081-439-879997 (0439-879997 / 0-439-879997) +81-439-879998 / 01081-439-879998 (0439-879998 / 0-439-879998) +81-439-879999 / 01081-439-879999 (0439-879999 / 0-439-879999)