028 Area Code — Northern Ireland, Castlereagh & Newtownabbey

028 is the UK dialling code for Northern Ireland in City of Belfast, also serving Castlereagh, Newtownabbey and Lisburn, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 1,304 distinct 028 numbers across 2,338 public lookups.

Quick facts

About the 028 dialling code

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

A full Northern Ireland number is normally written as 028 XXXXX. 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 028 number no longer guarantees the caller is physically in Northern Ireland. Fraudsters also "spoof" local codes like 028 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 028 dialling area

The marker shows Northern Ireland; the shaded circle is an approximate indication of the area the 028 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 028

Settlements in and around the Northern Ireland dialling area that typically use 028 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 028 from abroad

From outside the UK, dial your international access prefix, then the UK country code 44, then 28 (the area code without its leading zero) and the local number.

History of the 028 code

All Northern Ireland geographic codes (01232 Belfast, 01504 Londonderry and others) merged onto the single 028 code in the Big Number Change on 22 April 2000.

Top searched 028 numbers

These are the 028 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 028 safe?

Most 028 calls are ordinary local calls from Northern Ireland homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 028 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 028 (Northern Ireland) number from outside the UK, drop the leading zero and dial +44 28 followed by the local number.

Operators serving Northern Ireland

These UK communications providers have been allocated 028 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 028

Ofcom's National Numbering Plan lists 16,534 number blocks under 028, of which 3,337 are allocated to 140 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 3,337 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.

Common scam patterns reported in Northern Ireland

Categories most-commonly tagged on user-submitted reports for 028 numbers in our community comments.

• scam — 7 reports
• unknown — 1 report
• silent — 1 report
• legit — 1 report
• telemarketing — 1 report

How to block and report 028 spam calls

Block or report 028

• You can block 028 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 028 code

Neighbouring dialling codes

Codes covering areas around Northern Ireland — useful when a caller is nearby but outside the 028 boundary.

Living in or moving to Northern Ireland?

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

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.