Calls from (029) 2101 XXXX — Cardiff
Block (029) 2101 XXXX is allocated by Ofcom to EE, on the Cardiff exchange (allocated 2020).
(029) 2101 XXXX is a number block in Cardiff, in the historic county of South Glamorgan, Wales, an area with a population of approximately 480,000. Standard landlines in this area use the format 029 2101 1234, with the first part being the dialling code and the rest being the local number.
This block — (029) 2101 XXXX — was allocated by Ofcom to EE in 2020. EE either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single (029) 2101 XXXX prefix can be used by many different organisations. You can verify any allocation against Ofcom's National Telephone Numbering Plan, which is updated weekly.
A common UK scam pattern uses blocks like (029) 2101 XXXX for 'tech support' calls: a caller claims to be from Microsoft, BT, or your antivirus provider, and tries to get you to install remote-access software. No legitimate UK tech-support team will phone you out of the blue and ask to take control of your computer.
If a (029) 2101 XXXX number called you and you're not sure who it was, the safest steps are: don't return the call until you've verified it (search the full number online first), don't share personal or financial details, and register the number with the Telephone Preference Service (TPS) if it's a marketing call. Persistent unwanted calls can be reported to Ofcom and the ICO. To block a specific number on most UK mobiles and landlines, you can also enable network-level call screening through your provider.
FAQs about (029) 2101 XXXX
Is (029) 2101 XXXX a real UK phone number?
Yes. (029) 2101 XXXX is part of an Ofcom-allocated UK number block — any number starting with that prefix is a real, dialable UK number assigned by Ofcom to EE for use on the UK public telephone network.
Who owns the (029) 2101 XXXX number block?
(029) 2101 XXXX is currently allocated to EE in Ofcom's National Telephone Numbering Plan. The allocated carrier may operate the numbers directly or sub-allocate them to downstream resellers — both arrangements are normal under UK telecoms rules.
Where is a (029) 2101 XXXX number based?
(029) 2101 XXXX is associated with Cardiff. UK geographic numbers historically indicated the location of the line, although VoIP services and number-portability rules mean a (029) 2101 XXXX number can technically be used anywhere a CP routes it. For most UK landlines the geographic match still holds.
How do I block calls from (029) 2101 XXXX?
On most UK smartphones, open the recent-calls list, tap the number, and choose 'Block this caller'. UK landlines from BT, Sky, TalkTalk and Virgin Media include free 'BT Call Protect'-style screening you can enable in your provider's app. You can also register your number with the Telephone Preference Service (TPS) at tpsonline.org.uk to opt out of legitimate UK marketing calls.
Other blocks in (029)
Try a different block within the same UK area code:
