Area Code +44-20-(37890000...37899999) located in London, City of London (LND), more detail is as below. Place International Dialing Code : 44 International Prefix : 00 National Prefix : 0 National Destination Code : 20 Subscriber Number From : 37890000 Subscriber Number To : 37899999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Foehn Limited Click here to buy United Kingdom Area Code Database Other Information Language Code : en (English) Country Number : 826 (United Kingdom) Country Code : GB (United Kingdom) Region Code : LND Region Name : City of London City : London Timezone : Europe/London Coordinated Universal Time : +00:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 51.5100 Longitude : -0.1300 ‹ previous : +44-20-(37880000...37889999) next › : +44-20-(37900000...37909999) Dialling Instructions For trunk calls: 0 20 37890000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 44 20 37890000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 37890000 ~ 37899999 (Count: 10,000) Example: +44-20-37890000 / 0044-20-37890000 (020-37890000 / 0-20-37890000) +44-20-37890001 / 0044-20-37890001 (020-37890001 / 0-20-37890001) +44-20-37890002 / 0044-20-37890002 (020-37890002 / 0-20-37890002) +44-20-37890003 / 0044-20-37890003 (020-37890003 / 0-20-37890003) +44-20-37890004 / 0044-20-37890004 (020-37890004 / 0-20-37890004) ...+44-20-xxxxxxxx / 0044-20-xxxxxxxx (020-xxxxxxxx / 0-20-xxxxxxxx) ...+44-20-37899995 / 0044-20-37899995 (020-37899995 / 0-20-37899995) +44-20-37899996 / 0044-20-37899996 (020-37899996 / 0-20-37899996) +44-20-37899997 / 0044-20-37899997 (020-37899997 / 0-20-37899997) +44-20-37899998 / 0044-20-37899998 (020-37899998 / 0-20-37899998) +44-20-37899999 / 0044-20-37899999 (020-37899999 / 0-20-37899999)