The 01437 area code: Haverfordwest

01437 is the UK dialling code for Haverfordwest, in Pembrokeshire. It is a geographic landline code, so calling it costs the same as any other UK landline number and is usually included in call allowances.

Built from Ofcom numbering data, last refreshed 2026-07-24.

01437 at a glance

Area
Haverfordwest, Pembrokeshire, Wales
Number format
(01437) XXX XXX, 6-digit local numbers
Calling from abroad
+44 1437 then the local number, dropping the first 0
Call cost
Standard UK landline rate, usually included in call allowances

Ofcom lists this code area under several local names: Clynderwen, Haverfordwest.

Where 01437 reaches

The 01437 code serves Haverfordwest, St Davids, Clynderwen, Maenclochog, Camrose and the surrounding area.

Haverfordwest, the county town of Pembrokeshire, has a population of around 12,000 (2021 census).

Unusually, Ofcom lists 01437 under two sub areas, Clynderwen and Haverfordwest, a legacy of the former separate Clynderwen code area being absorbed into the Haverfordwest code.

Getting calls from a 01437 number?

01437 is a legitimate geographic code, so most calls from it are ordinary: local businesses, surgeries, schools, councils and households in the Haverfordwest area. Two things are worth knowing before you call back.

First, caller display can be faked. Scammers spoof real UK area codes to look local, so a 01437 number on your screen is not proof the call came from Haverfordwest. Second, the safe habit is simple: if a caller you were not expecting asks for personal or payment details, hang up and ring the organisation back on a number you found independently.

Checking a full number rather than just the code? Try our free UK phone number checker, which identifies the area and original provider of any UK number from Ofcom data.

Who issues 01437 numbers?

Ofcom allocates 01437 numbers to communications providers in blocks. These providers currently hold the most number blocks in the Haverfordwest area:

  • BT - 13 number blocks
  • Magrathea Telecommunications Limited - 7 number blocks
  • Gamma Telecom Holdings Limited - 7 number blocks
  • Resilient Limited - 3 number blocks
  • Served Up Limited - 3 number blocks

167 blocks allocated in total. The provider a number was first issued to is not necessarily who serves it today, because numbers move between providers when ported.

Get a 01437 number for your business

A Haverfordwest number makes your business local to the people searching for it, wherever you actually answer the phone. ONSIM supplies 01437 numbers two ways: a virtual number that diverts to any phone from £5 a month, or on a Landline SIM from £10 a month so your mobile rings and dials as the 01437 number, with call recording available for regulated trades.

Already have a 01437 number? You can bring it with you. Porting in is included on Landline SIM plans, or a one-off £20 + VAT on Virtual Landline.

Get a quote Virtual landline → Landline SIM →

Not sure which number type fits? Two minutes with the business number chooser will tell you.

01437 area code questions

Where is the 01437 area code?

01437 is the dialling code for Haverfordwest, in Pembrokeshire, Wales. It serves Haverfordwest, St Davids, Clynderwen, Maenclochog, Camrose and the surrounding area. The code and the areas it serves are set by Ofcom, the UK communications regulator.

How much does it cost to call a 01437 number?

01437 numbers are standard UK geographic landline numbers, charged at the same rate as any other 01 or 02 number. Most mobile and landline tariffs include them in inclusive minutes, so the call usually costs nothing extra. From abroad, dial +44 1437 followed by the local number, charged at your provider's international rate to the UK.

Why am I getting calls from a 01437 number?

Most calls from 01437 numbers are exactly what they look like: a business, GP surgery, school or household in the Haverfordwest area. But caller display can be faked, a practice called spoofing, so an unexpected call showing 01437 is not proof the caller is really local. If a caller asks for personal or payment details, hang up and call the organisation back on a number you found yourself, for example from its website or a bill.

Can I get a 01437 number for my business?

Yes. You do not need an office in Haverfordwest or a phone line from the dominant local provider. ONSIM can supply a 01437 number that diverts to any phone from £5 a month, or put it on a business SIM so your mobile makes and receives calls as the 01437 number. Existing 01437 numbers can be ported in: porting is included on Landline SIM plans, or a one-off £20 + VAT on Virtual Landline.

Keep exploring