UK Area Code Finder
Quick and easy telephone dialling code information
In the UK, an 02920 number is a normal landline phone number within the Cardiff (029) area code.
Any UK number beginning with 029 is a Cardiff number. The '029' area code at the beginning is optional if you're dialling from one Cardiff 029 landline phone to another.
There is no 02920 area code. Since the year 2000, Cardiff has had the three-digit area code 029, followed by eight-digit local numbers.
The correct way to write a number beginning '02920' is
During the year 2000, Cardiff's area code changed from 01222 to 029, while its old six-digit local phone numbers were prefixed with '20' to make them eight digits long.
The new system gives Cardiff nearly 80 million numbers: