UK area code
01638 — Newmarket
The 01638 dialling code covers Newmarket in Suffolk. Below are the currently-allocated Ofcom number ranges and the Range Holders they are assigned to.
About the 01638 dialling code
01638 is the UK area code for Newmarket and the surrounding Suffolk area, listed in Ofcom’s National Telephone Numbering Plan. When a UK landline calls you and the number begins +44 1638 the originating exchange is most likely physically located in or near Newmarket. 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 01638 can differ from the Range Holder shown — see Range Holder vs current provider for the full explanation.
To identify a specific 01638 number, paste it into the lookup form above. You will see the Range Holder, the allocation status, the area-code metadata for Newmarket, and a live AI internet check summarising any public web reports about that exact number — useful when an unfamiliar 01638 caller turns out to be a legitimate local business, a national contact-centre, or a scam.
Range holders on 01638
No Range Holder data is currently loaded for this code. Run the weekly Ofcom ingest to populate.
All allocated ranges on 01638
Showing up to 200 ranges, ordered by prefix.
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Related lookups
FAQs about 01638
What does the 01638 area code cover?
01638 is the UK dialling code for Newmarket and the wider Suffolk area. When you receive a call starting with 01638 from a UK landline, the originating exchange is likely in or near Newmarket.
Is a 01638 number safe?
Most calls from 01638 are legitimate landlines. Scammers can however spoof any UK area code, so a 01638 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 01638 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.