01437 Area Code — Haverfordwest, Crundale & Hook
01437 is the UK dialling code for Haverfordwest in Pembrokeshire, also serving Crundale, Hook and Llangwm, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 73 distinct 01437 numbers across 90 public lookups.
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Quick facts
Area code
01437
Location
Haverfordwest
County
Pembrokeshire
Region
Wales
Number type
Geographic landline
Number format
01437 XXX XXX
Operators serving
8+
Call cost
Standard rate
About the 01437 dialling code
01437 is the UK geographic dialling code for Haverfordwest, allocated by Ofcom under the National Telephone Numbering Plan. It is used by landlines — and increasingly VoIP lines — registered to the Haverfordwest area.
A full Haverfordwest number is normally written as 01437 XXXXXX. You can dial the local part on its own from within the same area, or the full number from anywhere in the UK.
Because of UK number portability and internet calling, a 01437 number no longer guarantees the caller is physically in Haverfordwest. Fraudsters also "spoof" local codes like 01437 so an unknown call looks like a nearby business or neighbour — so treat an unexpected call on what is actually said, not on the area code alone.
Map of the 01437 dialling area
The marker shows Haverfordwest; the shaded circle is an approximate indication of the area the 01437 code serves — exact Ofcom charging-area boundaries are irregular and don't follow a neat radius.
Map data © OpenStreetMap contributors. View larger map
Areas typically served by 01437
Settlements in and around the Haverfordwest dialling area that typically use 01437 numbers. Approximate — Ofcom charging-area boundaries don't follow town or county lines exactly, and properties near a boundary may take a neighbouring code.
Calling 01437 from abroad
From outside the UK, dial your international access prefix, then the UK country code 44, then 1437 (the area code without its leading zero) and the local number.
| Calling from | Dial |
|---|---|
| United States & Canada | 011 44 1437 … |
| Europe / most of the world | 00 44 1437 … |
| Australia | 0011 44 1437 … |
| Any mobile phone | +44 1437 … |
History of the 01437 code
The code was 0437 until PhONEday, 16 April 1995, when a "1" was inserted after the leading zero to create 01437.
Top searched 01437 numbers
These are the 01437 numbers most-looked-up by visitors to our number checker. Click any number to see its full lookup page with risk-level, range holder, and community reports.
| Number | Searches | Last looked up |
|---|---|---|
| 01437 771932 | 5 | 3 Jul 2026 |
| 01437 957035 | 5 | 25 Jun 2026 |
| 01437 773355 | 4 | 2 Jul 2026 |
| 01437 957038 | 2 | 2 Jul 2026 |
| 01437 468303 | 2 | 28 Jun 2026 |
| 01437 957030 | 2 | 25 Jun 2026 |
| 01437 753348 | 2 | 17 Jun 2026 |
| 01437 765131 | 2 | 17 Jun 2026 |
| 01437 805231 | 2 | 12 Jun 2026 |
| 01437 771924 | 1 | 8 Jul 2026 |
| 01437 957037 | 1 | 8 Jul 2026 |
| 01437 771929 | 1 | 7 Jul 2026 |
| 01437 765127 | 1 | 6 Jul 2026 |
| 01437 753349 | 1 | 5 Jul 2026 |
| 01437 765125 | 1 | 4 Jul 2026 |
| 01437 771938 | 1 | 4 Jul 2026 |
| 01437 753343 | 1 | 4 Jul 2026 |
| 01437 771937 | 1 | 3 Jul 2026 |
| 01437 765134 | 1 | 2 Jul 2026 |
| 01437 771934 | 1 | 2 Jul 2026 |
Is a call from 01437 safe?
Most 01437 calls are ordinary local calls from Haverfordwest homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 01437 prefix so you are more likely to answer. Never share bank details, passwords or one-time security codes with an unexpected caller, even when the number looks local — hang up and call the organisation back on a number you have verified yourself.
To call a 01437 (Haverfordwest) number from outside the UK, drop the leading zero and dial +44 1437 followed by the local number.
Operators serving Haverfordwest
These UK communications providers have been allocated 01437 number blocks by Ofcom. The number of blocks per operator gives a rough sense of how widely each provider serves this area.
| Provider (Ofcom-allocated) | Allocated blocks |
|---|---|
| BT | 14 |
| 1XXXX | 10 |
| Gamma Telecom Holdings Limited | 10 |
| Magrathea Telecommunications Limited | 7 |
| TalkTalk Communications Limited | 4 |
| Resilient Limited | 3 |
| Fuse 2 Communications Ltd | 3 |
| Sky UK Limited | 3 |
Ofcom number ranges on 01437
Ofcom's National Numbering Plan lists 559 number blocks under 01437, of which 167 are allocated to 89 communications providers. The first allocated blocks are shown below — look up any full number with the number checker to see its exact range holder.
| Number block | Status | Range holder (Ofcom-allocated) |
|---|---|---|
01437200… | Allocated | Inet Telecoms Ltd (Voipfone) |
01437203… | Allocated | Atomstream Limited |
01437204… | Allocated | Suretec Systems Ltd |
01437205… | Allocated | Calltracks Limited |
01437206… | Allocated | GCI Network Solutions Limited |
01437207… | Allocated | TGL Services (UK) Ltd |
01437208… | Allocated | VoiceHost Limited |
01437209… | Allocated | Invosys Limited |
01437211… | Allocated | YayYay Limited |
01437212… | Allocated | M247 Ltd |
01437213… | Allocated | Barritel Limited |
01437214… | Allocated | TalkTalk Communications Limited |
Showing 12 of 167 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.
How to block and report 01437 spam calls
Block or report 01437
- You can block 01437 directly from your recent-calls list on iPhone or Android, and forward scam texts free to 7726.
- Scam or fraud calls should be reported to Action Fraud (0300 123 2040) or Police Scotland (101); persistent marketing calls to the ICO / TPS.
Full step-by-step instructions for every phone, network-level blocking and all UK reporting routes are in our guide: How to block and report unwanted calls in the UK.
How to stop unwanted calls for good
Blocking 01437 numbers stops that one number, but determined nuisance callers simply switch numbers. Silencing unknown callers, enabling your network's free spam shield and registering with the TPS cut the volume across the board — our canonical guide walks through each step: How to block and report unwanted calls in the UK.
Frequently asked questions about the 01437 code
Where is the 01437 area code?
The 01437 area code is allocated by Ofcom to Haverfordwest in Pembrokeshire, United Kingdom. It is a geographic UK landline dialling code under the National Telephone Numbering Plan. The surrounding dialling area also takes in Crundale, Hook, Llangwm and nearby villages.
Is 01437 always a Haverfordwest number?
Numbers with the 01437 prefix were originally allocated by Ofcom to Haverfordwest. With UK number portability and VoIP allowing geographic relocation while keeping the same number, the call origin can differ from the original area, but the prefix's official assigned location remains Haverfordwest.
How do I block 01437 spam calls?
On iPhone, tap the (i) next to the number in Recents and choose Block this Caller. On Android, long-press the number in Recents and choose Block. To prevent unknown 01437 numbers ringing, enable Settings → Phone → Silence Unknown Callers (iPhone) or your dialler's spam filter (Android). Forward spam texts to 7726 free of charge.
How much does a 01437 call cost?
Calls to UK 01437 geographic numbers are charged at your provider's standard rate and are usually included in inclusive minutes on any modern landline or mobile plan.
Neighbouring dialling codes
Codes covering areas around Haverfordwest — useful when a caller is nearby but outside the 01437 boundary.
Living in or moving to Haverfordwest?
Our free postcode reports cover house prices, crime, broadband and schools for the districts around Haverfordwest.
Check another UK number
Have the full 10- or 11-digit number? The UK Phone Number Checker shows the Ofcom range holder, risk level, and any community reports for that specific number.