Area Code +81-439-(770000...779999) 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 : 770000 Subscriber Number To : 779999 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-(730000...739999) next › : +81-439-(800000...809999) Dialling Instructions For trunk calls: 0 439 770000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 439 770000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 770000 ~ 779999 (Count: 10,000) Example: +81-439-770000 / 01081-439-770000 (0439-770000 / 0-439-770000) +81-439-770001 / 01081-439-770001 (0439-770001 / 0-439-770001) +81-439-770002 / 01081-439-770002 (0439-770002 / 0-439-770002) +81-439-770003 / 01081-439-770003 (0439-770003 / 0-439-770003) +81-439-770004 / 01081-439-770004 (0439-770004 / 0-439-770004) ...+81-439-xxxxxx / 01081-439-xxxxxx (0439-xxxxxx / 0-439-xxxxxx) ...+81-439-779995 / 01081-439-779995 (0439-779995 / 0-439-779995) +81-439-779996 / 01081-439-779996 (0439-779996 / 0-439-779996) +81-439-779997 / 01081-439-779997 (0439-779997 / 0-439-779997) +81-439-779998 / 01081-439-779998 (0439-779998 / 0-439-779998) +81-439-779999 / 01081-439-779999 (0439-779999 / 0-439-779999)