029 area code: Cardiff
029 is the UK dialling code for Cardiff, in Wales. Numbers are 029 followed by 8 digits.
- Area
- Cardiff
- Where
- Wales
- Written as
- 029 xxxx xxxx
- Digits in a full number
- 11, including the 0
- Calling from abroad
- +44 29 xxxxxxxx
- Phone companies holding ranges
- 138 (Ofcom allocation data). This doesn’t show which company a particular number is with, or who uses it.
Where 029 is
Cardiff is a city in Wales.
Could it be someone you know?
A number showing 029 might look familiar. Check the full number before trusting the caller. It can help to think whether you know someone in or around Cardiff, Barry or Pontypridd, have used a business there, booked or applied for something nearby, or are expecting a callback.
Codes near Cardiff
Straight-line distance from Cardiff.
Does 029 tell me who called?
No. 029 is assigned to Cardiff, but that doesn’t prove who is calling or where they are. Caller ID can be faked, a number keeps its code when it moves provider, and 138 phone companies hold ranges of 029 numbers. Search the full number to see what people have reported about it and which phone company its range was given to.
Caller says they’re your bank, HMRC, the police or a courier? Hang up and call a number you trust, from your card, a letter or their website, or dial 159 for most UK banks.
Ofcom keeps 029 2018 0000 to 029 2018 0999 for TV and film. Those numbers can never connect, so if one called you, the caller ID was faked.
Reported 029 numbers
Nobody has reported an 029 number to us yet. If one has been calling you, report it so the next person sees it.
Codes, code lengths and provider counts from Ofcom’s numbering data, downloaded 23 September 2026. Places from Wikidata. All UK area codes · Who called me? · Stop spam calls