Area Code +81-428-(280000...289999) located in Ome, Tokyo (13), more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 428 Subscriber Number From : 280000 Subscriber Number To : 289999 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 : Softbank Mobile Click here to buy Japan Area Code Database Other Information Language Code : ja (Japanese) Country Number : 392 (Japan) Country Code : JP (Japan) Region Code : 13 Region Name : Tokyo City : Ome Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 9 Latitude : 35.7900 Longitude : 139.2800 ‹ previous : +81-428-(270000...279999) next › : +81-428-(300000...309999) Dialling Instructions For trunk calls: 0 428 280000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 428 280000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 280000 ~ 289999 (Count: 10,000) Example: +81-428-280000 / 01081-428-280000 (0428-280000 / 0-428-280000) +81-428-280001 / 01081-428-280001 (0428-280001 / 0-428-280001) +81-428-280002 / 01081-428-280002 (0428-280002 / 0-428-280002) +81-428-280003 / 01081-428-280003 (0428-280003 / 0-428-280003) +81-428-280004 / 01081-428-280004 (0428-280004 / 0-428-280004) ...+81-428-xxxxxx / 01081-428-xxxxxx (0428-xxxxxx / 0-428-xxxxxx) ...+81-428-289995 / 01081-428-289995 (0428-289995 / 0-428-289995) +81-428-289996 / 01081-428-289996 (0428-289996 / 0-428-289996) +81-428-289997 / 01081-428-289997 (0428-289997 / 0-428-289997) +81-428-289998 / 01081-428-289998 (0428-289998 / 0-428-289998) +81-428-289999 / 01081-428-289999 (0428-289999 / 0-428-289999)