Where is telephone country code 029?

029 is the area code for Cardiff in the UK, and is followed by an eight digit local number.

The 029 code can be left out when dialling within Cardiff.

Cardiff numbers are commonly misquoted in the format 02920 xxxxxx, but this is incorrect and leads to misdialling of newer Cardiff 21xx xxxx and 22xx xxxx numbers. The correct format is: (029) xxxx xxxx.