01871 Area Code — Castlebay & Barra

01871 is the UK dialling code for Castlebay in Eilean Siar, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 21 distinct 01871 numbers across 25 public lookups.

Quick facts

About the 01871 dialling code

01871 is the UK geographic dialling code for Castlebay, allocated by Ofcom under the National Telephone Numbering Plan. It is used by landlines — and increasingly VoIP lines — registered to the Castlebay area.

A full Castlebay number is normally written as 01871 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 01871 number no longer guarantees the caller is physically in Castlebay. Fraudsters also "spoof" local codes like 01871 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 01871 dialling area

The marker shows Castlebay; the shaded circle is an approximate indication of the area the 01871 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 01871

Settlements in and around the Castlebay dialling area that typically use 01871 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 01871 from abroad

From outside the UK, dial your international access prefix, then the UK country code 44, then 1871 (the area code without its leading zero) and the local number.

History of the 01871 code

The code was 0871 until PhONEday, 16 April 1995, when a "1" was inserted after the leading zero to create 01871.

Top searched 01871 numbers

These are the 01871 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.

Is a call from 01871 safe?

Most 01871 calls are ordinary local calls from Castlebay homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 01871 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 01871 (Castlebay) number from outside the UK, drop the leading zero and dial +44 1871 followed by the local number.

Operators serving Castlebay

These UK communications providers have been allocated 01871 number blocks by Ofcom. The number of blocks per operator gives a rough sense of how widely each provider serves this area.

Ofcom number ranges on 01871

Ofcom's National Numbering Plan lists 505 number blocks under 01871, of which 90 are allocated to 79 communications providers. The first allocated blocks are shown below — look up any full number with the number checker to see its exact range holder.

Showing 12 of 90 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.

How to block and report 01871 spam calls

Block or report 01871

• You can block 01871 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.

Frequently asked questions about the 01871 code

Neighbouring dialling codes

Codes covering areas around Castlebay — useful when a caller is nearby but outside the 01871 boundary.

Living in or moving to Castlebay?

Our free postcode reports cover house prices, crime, broadband and schools for the districts around Castlebay.

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.