02045996879 who called me in uk 020 area code : The UK’s 020 area code, encompassing London and its surrounding areas, is one of the busiest and most diverse regions in the country. With millions of residents and countless businesses, it’s no surprise that this area is a hub for telecommunications activity. If you’ve received a call from a number within the 020 area code and are wondering who it might be, you’re not alone.  we’ll delve into the world of UK area codes, discuss common reasons for receiving calls from the 020 area code, and offer tips on identifying the caller.