01604 Area Code — Northampton, Hardingstone & Brixworth
01604 is the UK dialling code for Northampton in West Northamptonshire, also serving Hardingstone, Brixworth and Bugbrooke, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 609 distinct 01604 numbers across 1,026 public lookups.
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Quick facts
Area code
01604
Location
Northampton
County
West Northamptonshire
Region
East Midlands
Number type
Geographic landline
Number format
01604 XXX XXX
Operators serving
8+
Call cost
Standard rate
About the 01604 dialling code
01604 is the UK geographic dialling code for Northampton, allocated by Ofcom under the National Telephone Numbering Plan. It is used by landlines — and increasingly VoIP lines — registered to the Northampton area.
A full Northampton number is normally written as 01604 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 01604 number no longer guarantees the caller is physically in Northampton. Fraudsters also "spoof" local codes like 01604 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 01604 dialling area
The marker shows Northampton; the shaded circle is an approximate indication of the area the 01604 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 01604
Settlements in and around the Northampton dialling area that typically use 01604 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 01604 from abroad
From outside the UK, dial your international access prefix, then the UK country code 44, then 1604 (the area code without its leading zero) and the local number.
| Calling from | Dial |
|---|---|
| United States & Canada | 011 44 1604 … |
| Europe / most of the world | 00 44 1604 … |
| Australia | 0011 44 1604 … |
| Any mobile phone | +44 1604 … |
History of the 01604 code
The code was 0604 until PhONEday, 16 April 1995, when a "1" was inserted after the leading zero to create 01604.
Top searched 01604 numbers
These are the 01604 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 |
|---|---|---|
| 01604 444257 | 42 | 9 Jul 2026 |
| 01604 326326 | 14 | 11 Jul 2026 |
| 01604 913120 | 14 | 8 Jul 2026 |
| 01604 913123 | 12 | 6 Jul 2026 |
| 01604 326368 | 11 | 2 Jul 2026 |
| 01604 633001 | 10 | 1 Jul 2026 |
| 01604 326367 | 9 | 10 Jul 2026 |
| 01604 211486 | 9 | 10 Jul 2026 |
| 01604 326269 | 9 | 26 Jun 2026 |
| 01604 213958 | 8 | 11 Jul 2026 |
| 01604 326463 | 8 | 9 Jul 2026 |
| 01604 913121 | 8 | 5 Jul 2026 |
| 01604 326270 | 8 | 29 Jun 2026 |
| 01604 809685 | 8 | 28 Jun 2026 |
| 01604 326323 | 8 | 25 Jun 2026 |
| 01604 326271 | 7 | 11 Jul 2026 |
| 01604 907202 | 7 | 3 Jul 2026 |
| 01604 345704 | 7 | 24 Jun 2026 |
| 01604 326325 | 6 | 11 Jul 2026 |
| 01604 326196 | 6 | 11 Jul 2026 |
Is a call from 01604 safe?
Most 01604 calls are ordinary local calls from Northampton homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 01604 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 01604 (Northampton) number from outside the UK, drop the leading zero and dial +44 1604 followed by the local number.
Operators serving Northampton
These UK communications providers have been allocated 01604 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 | 120 |
| Gamma Telecom Holdings Limited | 33 |
| GCI Network Solutions Limited | 24 |
| Sky UK Limited | 21 |
| Vodafone Ltd (C&W) | 18 |
| TalkTalk Communications Limited | 13 |
| 1XXXX | 9 |
| Colt Technology Services | 8 |
Ofcom number ranges on 01604
Ofcom's National Numbering Plan lists 496 number blocks under 01604, of which 353 are allocated to 90 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) |
|---|---|---|
0160400… | Allocated | Gamma Telecom Holdings Limited |
0160401… | Allocated | Gamma Telecom Holdings Limited |
01604200… | Allocated | DRD Communications Limited |
01604201… | Allocated | DRD Communications Limited |
01604204… | Allocated | HAVENSTOKE COMMUNICATIONS LTD |
01604206… | Allocated | Hello Telecom (UK) Limited |
01604207… | Allocated | Internexus Networks Limited |
01604208… | Allocated | 24 Seven Cloud Communications Ltd |
01604209… | Allocated | Belgacom International Carrier Services SA |
0160421… | Allocated | Gamma Telecom Holdings Limited |
01604222… | Allocated | Redcentric Solutions Limited |
01604224… | Allocated | Redcentric Solutions Limited |
Showing 12 of 353 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.
Common scam patterns reported in Northampton
Categories most-commonly tagged on user-submitted reports for 01604 numbers in our community comments.
- scam — 1 report
How to block and report 01604 spam calls
Block or report 01604
- You can block 01604 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 01604 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 01604 code
Where is the 01604 area code?
The 01604 area code is allocated by Ofcom to Northampton in West Northamptonshire, United Kingdom. It is a geographic UK landline dialling code under the National Telephone Numbering Plan. The surrounding dialling area also takes in Hardingstone, Brixworth, Bugbrooke and nearby villages.
Is 01604 always a Northampton number?
Numbers with the 01604 prefix were originally allocated by Ofcom to Northampton. 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 Northampton.
How do I block 01604 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 01604 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 01604 call cost?
Calls to UK 01604 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 Northampton — useful when a caller is nearby but outside the 01604 boundary.
Living in or moving to Northampton?
Our free postcode reports cover house prices, crime, broadband and schools for the districts around Northampton.
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.