Calls from (020) 7336 XXXX — London
Block (020) 7336 XXXX is allocated by Ofcom to BT, on the London exchange (allocated 1999).
(020) 7336 XXXX is a number block in London, an area with a population of approximately 9,540,000. Standard landlines in this area use the format 020 7336 1234, with the first part being the dialling code and the rest being the local number.
This block — (020) 7336 XXXX — was allocated by Ofcom to BT in 1999. BT either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single (020) 7336 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.
Some calls from blocks like (020) 7336 XXXX are actually one-ring 'wangiri' calls — the line rings once and disconnects, hoping you'll call back. While wangiri is more common from foreign numbers, UK number-spoofing means (020) 7336 XXXX-style ringbacks are not unheard of. Don't return missed calls from unknown numbers without checking them first.
If a (020) 7336 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 (020) 7336 XXXX
Is (020) 7336 XXXX a real UK phone number?
Yes. (020) 7336 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 BT for use on the UK public telephone network.
Who owns the (020) 7336 XXXX number block?
(020) 7336 XXXX is currently allocated to BT 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 (020) 7336 XXXX number based?
(020) 7336 XXXX is associated with London. UK geographic numbers historically indicated the location of the line, although VoIP services and number-portability rules mean a (020) 7336 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 (020) 7336 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 (020)
Try a different block within the same UK area code:
