01638 Area Code — Newmarket, Burwell & Exning
01638 is the UK dialling code for Newmarket in Suffolk, also serving Burwell, Exning and Fordham, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 111 distinct 01638 numbers across 141 public lookups.
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Quick facts
Area code
01638
Location
Newmarket
County
Suffolk
Region
East of England
Number type
Geographic landline
Number format
01638 XXX XXX
Operators serving
8+
Call cost
Standard rate
About the 01638 dialling code
01638 is the UK geographic dialling code for Newmarket, allocated by Ofcom under the National Telephone Numbering Plan. It is used by landlines — and increasingly VoIP lines — registered to the Newmarket area.
A full Newmarket number is normally written as 01638 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 01638 number no longer guarantees the caller is physically in Newmarket. Fraudsters also "spoof" local codes like 01638 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 01638 dialling area
The marker shows Newmarket; the shaded circle is an approximate indication of the area the 01638 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 01638
Settlements in and around the Newmarket dialling area that typically use 01638 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 01638 from abroad
From outside the UK, dial your international access prefix, then the UK country code 44, then 1638 (the area code without its leading zero) and the local number.
| Calling from | Dial |
|---|---|
| United States & Canada | 011 44 1638 … |
| Europe / most of the world | 00 44 1638 … |
| Australia | 0011 44 1638 … |
| Any mobile phone | +44 1638 … |
History of the 01638 code
The code was 0638 until PhONEday, 16 April 1995, when a "1" was inserted after the leading zero to create 01638.
In the letter-dialling era the code had the mnemonic NE8 — on an old rotary dial, the letters NE (from Newmarket) sat on the same holes as the digits 638, so subscribers literally dialled the start of the town's name.
Top searched 01638 numbers
These are the 01638 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 |
|---|---|---|
| 01638 640082 | 5 | 9 Jul 2026 |
| 01638 675524 | 5 | 4 Jul 2026 |
| 01638 583042 | 4 | 8 Jul 2026 |
| 01638 583032 | 3 | 10 Jul 2026 |
| 01638 952926 | 3 | 9 Jul 2026 |
| 01638 781799 | 3 | 8 Jul 2026 |
| 01638 558686 | 3 | 7 Jul 2026 |
| 01638 583153 | 3 | 6 Jul 2026 |
| 01638 353367 | 3 | 5 Jul 2026 |
| 01638 712669 | 2 | 11 Jul 2026 |
| 01638 262083 | 2 | 9 Jul 2026 |
| 01638 591567 | 2 | 8 Jul 2026 |
| 01638 720375 | 2 | 4 Jul 2026 |
| 01638 262085 | 2 | 3 Jul 2026 |
| 01638 720387 | 2 | 2 Jul 2026 |
| 01638 528000 | 2 | 17 Jun 2026 |
| 01638 675529 | 1 | 11 Jul 2026 |
| 01638 675519 | 1 | 10 Jul 2026 |
| 01638 675520 | 1 | 10 Jul 2026 |
| 01638 675518 | 1 | 10 Jul 2026 |
Is a call from 01638 safe?
Most 01638 calls are ordinary local calls from Newmarket homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 01638 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 01638 (Newmarket) number from outside the UK, drop the leading zero and dial +44 1638 followed by the local number.
Operators serving Newmarket
These UK communications providers have been allocated 01638 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 | 23 |
| GCI Network Solutions Limited | 12 |
| Sky UK Limited | 8 |
| Vodafone Ltd (C&W) | 7 |
| TalkTalk Communications Limited | 4 |
| Six Degrees Technology Group Limited | 2 |
| Fuse 2 Communications Ltd | 2 |
| Colt Technology Services | 2 |
Ofcom number ranges on 01638
Ofcom's National Numbering Plan lists 442 number blocks under 01638, of which 146 are allocated to 94 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) |
|---|---|---|
0163810… | Allocated | BT |
0163814… | Allocated | BT |
0163821… | Allocated | TelNG Limited |
0163824… | Allocated | Redcentric Solutions Limited |
0163825… | Allocated | Barritel Limited |
0163826… | Allocated | Voiceflex Limited |
01638277… | Allocated | Spitfire Network Services Limited |
0163828… | Allocated | TTNC Limited |
0163830… | Allocated | Localphone Limited |
01638310… | Allocated | Linear Telecoms Limited |
01638311… | Allocated | Inet Telecoms Ltd (Voipfone) |
01638313… | Allocated | Internexus Networks Limited |
Showing 12 of 146 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.
How to block and report 01638 spam calls
Block or report 01638
- You can block 01638 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 01638 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 01638 code
Where is the 01638 area code?
The 01638 area code is allocated by Ofcom to Newmarket in Suffolk, United Kingdom. It is a geographic UK landline dialling code under the National Telephone Numbering Plan. The surrounding dialling area also takes in Burwell, Exning, Fordham and nearby villages.
Is 01638 always a Newmarket number?
Numbers with the 01638 prefix were originally allocated by Ofcom to Newmarket. 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 Newmarket.
How do I block 01638 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 01638 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 01638 call cost?
Calls to UK 01638 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 Newmarket — useful when a caller is nearby but outside the 01638 boundary.
Living in or moving to Newmarket?
Our free postcode reports cover house prices, crime, broadband and schools for the districts around Newmarket.
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.