Area Code +44-20-(30300000...30309999) 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 : 30300000 Subscriber Number To : 30309999 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 : Served Up 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-(30290000...30299999) next › : +44-20-(30310000...30319999) Dialling Instructions For trunk calls: 0 20 30300000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 44 20 30300000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 30300000 ~ 30309999 (Count: 10,000) Example: +44-20-30300000 / 0044-20-30300000 (020-30300000 / 0-20-30300000) +44-20-30300001 / 0044-20-30300001 (020-30300001 / 0-20-30300001) +44-20-30300002 / 0044-20-30300002 (020-30300002 / 0-20-30300002) +44-20-30300003 / 0044-20-30300003 (020-30300003 / 0-20-30300003) +44-20-30300004 / 0044-20-30300004 (020-30300004 / 0-20-30300004) ...+44-20-xxxxxxxx / 0044-20-xxxxxxxx (020-xxxxxxxx / 0-20-xxxxxxxx) ...+44-20-30309995 / 0044-20-30309995 (020-30309995 / 0-20-30309995) +44-20-30309996 / 0044-20-30309996 (020-30309996 / 0-20-30309996) +44-20-30309997 / 0044-20-30309997 (020-30309997 / 0-20-30309997) +44-20-30309998 / 0044-20-30309998 (020-30309998 / 0-20-30309998) +44-20-30309999 / 0044-20-30309999 (020-30309999 / 0-20-30309999)