UK area code
01420 — Alton
The 01420 dialling code covers Alton in Hampshire. Below are the currently-allocated Ofcom number ranges and the Range Holders they are assigned to.
About the 01420 dialling code
01420 is the UK area code for Alton and the surrounding Hampshire area, listed in Ofcom’s National Telephone Numbering Plan. When a UK landline calls you and the number begins +44 1420 the originating exchange is most likely physically located in or near Alton. 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 01420 can differ from the Range Holder shown — see Range Holder vs current provider for the full explanation.
To identify a specific 01420 number, paste it into the lookup form above. You will see the Range Holder, the allocation status, the area-code metadata for Alton, and a live AI internet check summarising any public web reports about that exact number — useful when an unfamiliar 01420 caller turns out to be a legitimate local business, a national contact-centre, or a scam.
Range holders on 01420
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All allocated ranges on 01420
Showing up to 200 ranges, ordered by prefix.
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Related lookups
FAQs about 01420
What does the 01420 area code cover?
01420 is the UK dialling code for Alton and the wider Hampshire area. When you receive a call starting with 01420 from a UK landline, the originating exchange is likely in or near Alton.
Is a 01420 number safe?
Most calls from 01420 are legitimate landlines. Scammers can however spoof any UK area code, so a 01420 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 01420 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.