UK area code
01558 — Llandeilo
The 01558 dialling code covers Llandeilo in Wales. Below are the currently-allocated Ofcom number ranges and the Range Holders they are assigned to.
About the 01558 dialling code
01558 is the UK area code for Llandeilo and the surrounding Wales area, listed in Ofcom’s National Telephone Numbering Plan. When a UK landline calls you and the number begins +44 1558 the originating exchange is most likely physically located in or near Llandeilo. 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 01558 can differ from the Range Holder shown — see Range Holder vs current provider for the full explanation.
To identify a specific 01558 number, paste it into the lookup form above. You will see the Range Holder, the allocation status, the area-code metadata for Llandeilo, and a live AI internet check summarising any public web reports about that exact number — useful when an unfamiliar 01558 caller turns out to be a legitimate local business, a national contact-centre, or a scam.
Range holders on 01558
No Range Holder data is currently loaded for this code. Run the weekly Ofcom ingest to populate.
All allocated ranges on 01558
Showing up to 200 ranges, ordered by prefix.
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Related lookups
FAQs about 01558
What does the 01558 area code cover?
01558 is the UK dialling code for Llandeilo and the wider Wales area. When you receive a call starting with 01558 from a UK landline, the originating exchange is likely in or near Llandeilo.
Is a 01558 number safe?
Most calls from 01558 are legitimate landlines. Scammers can however spoof any UK area code, so a 01558 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 01558 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.