Calls from 01833 528 XXX — Barnard Castle
Block 01833 528 XXX is allocated by Ofcom to Zapappi Ltd, on the Barnard Castle exchange (allocated 2018).
01833 528 XXX is a number block in Barnard Castle, in the historic county of County Durham, an area with a population of approximately 5,610. Standard landlines in this area use the format 01833 528123, with the first part being the dialling code and the rest being the local number.
This block — 01833 528 XXX — was allocated by Ofcom to Zapappi Ltd in 2018. Zapappi Ltd either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single 01833 528 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 01833 528 XXX sometimes link to 'parcel undelivered' or 'card details expired' courier scams. The caller asks you to confirm a delivery address or re-enter card details on a follow-up SMS link. Real UK couriers (Royal Mail, DPD, Evri) handle these via the apps you signed up to, not by phone.
If a 01833 528 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 01833 528 XXX
Is 01833 528 XXX a real UK phone number?
Yes. 01833 528 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 Zapappi Ltd for use on the UK public telephone network.
Who owns the 01833 528 XXX number block?
01833 528 XXX is currently allocated to Zapappi Ltd 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 01833 528 XXX number based?
01833 528 XXX is associated with Barnard Castle. UK geographic numbers historically indicated the location of the line, although VoIP services and number-portability rules mean a 01833 528 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 01833 528 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 01833
Try a different block within the same UK area code:
