UK area code
01255 — Clacton-on-Sea
The 01255 dialling code covers Clacton-on-Sea in Essex. Below are the currently-allocated Ofcom number ranges and the Range Holders they are assigned to.
About the 01255 dialling code
01255 is the UK area code for Clacton-on-Sea and the surrounding Essex area, listed in Ofcom’s National Telephone Numbering Plan. When a UK landline calls you and the number begins +44 1255 the originating exchange is most likely physically located in or near Clacton-on-Sea. 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 01255 can differ from the Range Holder shown — see Range Holder vs current provider for the full explanation.
To identify a specific 01255 number, paste it into the lookup form above. You will see the Range Holder, the allocation status, the area-code metadata for Clacton-on-Sea, and a live AI internet check summarising any public web reports about that exact number — useful when an unfamiliar 01255 caller turns out to be a legitimate local business, a national contact-centre, or a scam.
Range holders on 01255
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All allocated ranges on 01255
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Related lookups
FAQs about 01255
What does the 01255 area code cover?
01255 is the UK dialling code for Clacton-on-Sea and the wider Essex area. When you receive a call starting with 01255 from a UK landline, the originating exchange is likely in or near Clacton-on-Sea.
Is a 01255 number safe?
Most calls from 01255 are legitimate landlines. Scammers can however spoof any UK area code, so a 01255 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 01255 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.