Area code 20
London · London
- Area code
- 20
- Country
- United Kingdom
- Region
- London
- Major cities
- London
- Time zone
- Europe/London
- Note
- London geographic area code, dialed as 020 domestically.
This is a domestic area code inside United Kingdom. It is not the international calling code.
Frequently asked questions
Which cities use area code 20?
Area code 20 serves London in United Kingdom, including London.
What region does area code 20 cover?
Area code 20 covers London. Area codes route calls to a specific city or region within a country's national telephone network.
What is the difference between an area code and a calling code?
A calling code routes a call across borders to a national network, while an area code routes it to a city or region inside that network. For a United Kingdom number, the country calling code is the international prefix and 20 is the domestic area code.
What time zone is area code 20 in?
Area code 20 is in the IANA time zone Europe/London.
Is area code 20 the international calling code?
No. 20 is a domestic area code inside United Kingdom, not the international calling code. To call this region from abroad, you dial the country's calling code first, then 20 and the local number.