Calls from 01766 621 XXX — Porthmadog
Block 01766 621 XXX is allocated by Ofcom to DIDWW Ireland Limited, on the Porthmadog exchange (allocated 2020).
01766 621 XXX is a number block in Porthmadog, in the historic county of Gwynedd, Wales, an area with a population of approximately 4,185. Standard landlines in this area use the format 01766 621123, with the first part being the dialling code and the rest being the local number.
This block — 01766 621 XXX — was allocated by Ofcom to DIDWW Ireland Limited in 2020. DIDWW Ireland Limited either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single 01766 621 XXX prefix can be used by many different organisations. You can verify any allocation against Ofcom's National Telephone Numbering Plan, which is updated weekly.
Calls from 01766 621 XXX numbers that ask you to 'press 1' or to call back a different number should be treated with caution. This is a classic premium-rate trap — the call-back number is often in the 09xx range and costs several pounds per minute. Never call back an unfamiliar number you've been instructed to dial.
If a 01766 621 XXX 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 01766 621 XXX
Is 01766 621 XXX a real UK phone number?
Yes. 01766 621 XXX 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 DIDWW Ireland Limited for use on the UK public telephone network.
Who owns the 01766 621 XXX number block?
01766 621 XXX is currently allocated to DIDWW Ireland Limited 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 01766 621 XXX number based?
01766 621 XXX is associated with Porthmadog. UK geographic numbers historically indicated the location of the line, although VoIP services and number-portability rules mean a 01766 621 XXX 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 01766 621 XXX?
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 01766
Try a different block within the same UK area code:
