01833 Area Code — Barnard Castle, Staindrop & Cotherstone
01833 is the UK dialling code for Barnard Castle in County Durham, also serving Staindrop, Cotherstone and Gainford, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 100 distinct 01833 numbers across 127 public lookups.
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Quick facts
Area code
01833
Location
Barnard Castle
County
County Durham
Region
North East England
Number type
Geographic landline
Number format
01833 XXX XXX
Operators serving
8+
Call cost
Standard rate
About the 01833 dialling code
01833 is the UK geographic dialling code for Barnard Castle, allocated by Ofcom under the National Telephone Numbering Plan. It is used by landlines — and increasingly VoIP lines — registered to the Barnard Castle area.
A full Barnard Castle number is normally written as 01833 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 01833 number no longer guarantees the caller is physically in Barnard Castle. Fraudsters also "spoof" local codes like 01833 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 01833 dialling area
The marker shows Barnard Castle; the shaded circle is an approximate indication of the area the 01833 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 01833
Settlements in and around the Barnard Castle dialling area that typically use 01833 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 01833 from abroad
From outside the UK, dial your international access prefix, then the UK country code 44, then 1833 (the area code without its leading zero) and the local number.
| Calling from | Dial |
|---|---|
| United States & Canada | 011 44 1833 … |
| Europe / most of the world | 00 44 1833 … |
| Australia | 0011 44 1833 … |
| Any mobile phone | +44 1833 … |
History of the 01833 code
The code was 0833 until PhONEday, 16 April 1995, when a "1" was inserted after the leading zero to create 01833.
Top searched 01833 numbers
These are the 01833 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 |
|---|---|---|
| 01833 633200 | 8 | 8 Jul 2026 |
| 01833 633351 | 6 | 11 Jul 2026 |
| 01833 600737 | 6 | 10 Jul 2026 |
| 01833 600491 | 4 | 25 Jun 2026 |
| 01833 600878 | 3 | 9 Jul 2026 |
| 01833 641133 | 2 | 11 Jul 2026 |
| 01833 600938 | 2 | 9 Jul 2026 |
| 01833 600890 | 2 | 26 Jun 2026 |
| 01833 633344 | 2 | 24 Jun 2026 |
| 01833 600919 | 2 | 18 Jun 2026 |
| 01833 633391 | 1 | 12 Jul 2026 |
| 01833 600953 | 1 | 12 Jul 2026 |
| 01833 633238 | 1 | 12 Jul 2026 |
| 01833 600525 | 1 | 12 Jul 2026 |
| 01833 633365 | 1 | 12 Jul 2026 |
| 01833 600463 | 1 | 10 Jul 2026 |
| 01833 630412 | 1 | 10 Jul 2026 |
| 01833 524559 | 1 | 9 Jul 2026 |
| 01833 633389 | 1 | 9 Jul 2026 |
| 01833 607093 | 1 | 8 Jul 2026 |
Is a call from 01833 safe?
Most 01833 calls are ordinary local calls from Barnard Castle homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 01833 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 01833 (Barnard Castle) number from outside the UK, drop the leading zero and dial +44 1833 followed by the local number.
Operators serving Barnard Castle
These UK communications providers have been allocated 01833 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 |
|---|---|
| GCI Network Solutions Limited | 11 |
| BT | 8 |
| TalkTalk Communications Limited | 2 |
| Fuse 2 Communications Ltd | 2 |
| AQL Wholesale Ltd | 1 |
| Lumen Technologies UK Limited | 1 |
| VoIP-Un Limited | 1 |
| Redcentric Solutions Limited | 1 |
Ofcom number ranges on 01833
Ofcom's National Numbering Plan lists 424 number blocks under 01833, of which 106 are allocated to 87 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) |
|---|---|---|
0183320… | Allocated | AQL Wholesale Ltd |
0183321… | Allocated | Lumen Technologies UK Limited |
0183322… | Allocated | Net-Work Internet Ltd |
0183323… | Allocated | Redcentric Solutions Limited |
0183324… | Allocated | Telecom2 Limited |
0183325… | Allocated | Digital Space Group Limited |
0183326… | Allocated | Nodemax Limited |
01833280… | Allocated | Voxbone SA |
0183329… | Allocated | Served Up Limited |
01833304… | Allocated | Six Degrees Technology Group Limited |
01833310… | Allocated | Linear Telecoms Limited |
01833311… | Allocated | ICC Networks Ltd |
Showing 12 of 106 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.
How to block and report 01833 spam calls
Block or report 01833
- You can block 01833 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 01833 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 01833 code
Where is the 01833 area code?
The 01833 area code is allocated by Ofcom to Barnard Castle in County Durham, United Kingdom. It is a geographic UK landline dialling code under the National Telephone Numbering Plan. The surrounding dialling area also takes in Staindrop, Cotherstone, Gainford and nearby villages.
Is 01833 always a Barnard Castle number?
Numbers with the 01833 prefix were originally allocated by Ofcom to Barnard Castle. 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 Barnard Castle.
How do I block 01833 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 01833 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 01833 call cost?
Calls to UK 01833 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 Barnard Castle — useful when a caller is nearby but outside the 01833 boundary.
Living in or moving to Barnard Castle?
Our free postcode reports cover house prices, crime, broadband and schools for the districts around Barnard Castle.
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.