UK area code
01842 — Thetford
The 01842 dialling code covers Thetford in Norfolk. Below are the currently-allocated Ofcom number ranges and the Range Holders they are assigned to.
About the 01842 dialling code
01842 is the UK area code for Thetford and the surrounding Norfolk area, listed in Ofcom’s National Telephone Numbering Plan. When a UK landline calls you and the number begins +44 1842 the originating exchange is most likely physically located in or near Thetford. Numbers in this code are allocated to UK communications providers in 1,000- or 10,000-number blocks; the table below shows which Range Holder Ofcom assigned each block to.
This is the same data Ofcom publishes every Wednesday in the public UK Numbering Data feed. We re-ingest the snapshot weekly, so the allocations you see here are at most seven days old. Because UK numbers are portable, the current carrier of any specific number on 01842 can differ from the Range Holder shown — see Range Holder vs current provider for the full explanation.
To identify a specific 01842 number, paste it into the lookup form above. You will see the Range Holder, the allocation status, the area-code metadata for Thetford, and a live AI internet check summarising any public web reports about that exact number — useful when an unfamiliar 01842 caller turns out to be a legitimate local business, a national contact-centre, or a scam.
Range holders on 01842
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All allocated ranges on 01842
Showing up to 200 ranges, ordered by prefix.
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Related lookups
FAQs about 01842
What does the 01842 area code cover?
01842 is the UK dialling code for Thetford and the wider Norfolk area. When you receive a call starting with 01842 from a UK landline, the originating exchange is likely in or near Thetford.
Is a 01842 number safe?
Most calls from 01842 are legitimate landlines. Scammers can however spoof any UK area code, so a 01842 prefix alone doesn't guarantee safety. Use the lookup above to see the Range Holder, then read the AI internet check for behavioural reports.
How many providers operate 01842 number ranges?
Across the 0 ranges currently visible, 0 different Range Holders are listed. The top allocations are typically held by Openreach (BT), Virgin Media O2 and Sky.