Phone numbers in Northern Ireland (the 028 code explained)

One code for the whole of Northern Ireland

Most of the UK is divided into hundreds of separate area codes, one or more for each town and city. Northern Ireland is different. Since 2000 it has used a single area code, 028, for the entire region. That change tidied up an older set of 01xxx codes that varied from place to place and brought everywhere from Belfast to Enniskillen under one recognisable prefix. The numbering plan for the UK is overseen by the regulator, Ofcom, which sets out how codes like 028 are structured and allocated.

The practical upshot is simple: an 028 number reads as local to a customer anywhere in Northern Ireland. You do not need a Belfast number for Belfast customers and a separate Derry/Londonderry number for the north west. One 028 number presents a single, clear main line across your whole trading area, which is exactly what you want when you are building a recognisable local presence. If you want one, you can choose a new 028 number on the dedicated area code page.

How to read an 028 number

An 028 number is written as 028 XXXX XXXX, with the 028 code followed by eight digits. The first two of those eight digits are the local prefix, and that is the part that tells you which town the number originates from. So a Belfast number runs 028 90XX XXXX, a Derry/Londonderry number runs 028 71XX XXXX, and so on. Because all of Northern Ireland is treated as a single dialling area, the local prefix is about where the number is from, not about how you dial it. Within the region you simply dial the eight digits, and from outside you dial the full 028 number.

This is why people sometimes mistake 028 for a Belfast-only code. It is not. The town identity lives in the two-digit local prefix that follows the code, and the table below shows the local prefix for the main towns and cities across Northern Ireland.

Northern Ireland town prefixes

Each town and city sits behind its own two-digit local prefix after the 028 code. Here are the ten most common across the region.

For a fuller picture of how 028 numbers are presented, dialled and ordered, the 028 area code page is the place to go. It covers the code in depth and is where you pick a number when you are ready.

Getting a brand-new 028 number

With a traditional phone line, the number you can have is tied to the exchange your line connects to, so where you are physically based limits your options. A cloud phone system removes that link entirely. Because the number lives in software rather than on a copper line, you can get a brand-new 028 number wherever your team happens to be, even if some of your staff work from home or split their time across sites. You choose the number when you sign up and it works straight away on the mobile app, desktop app, web browser and any desk phones, all sharing the same call handling.

The same flexibility means an 028 number is answered anywhere. A call to your main 028 line can ring a desk in the office, a laptop at home and a mobile on the road at the same time, and an AI receptionist can pick it up out of hours and route it sensibly. The number behaves like a single front door to the business no matter where the people behind it are sitting. You can browse the available options on our phone numbers page.

Keeping an existing 028 number

If you already trade under an 028 number, switching to a cloud system does not mean giving it up. The number moves across through number porting, with nothing on the number itself changing, so customers carry on dialling exactly what they always have. The two-digit local prefix and everything after it stay the same. It is worth confirming that porting an 028 number is supported and that there is no charge before you commit, and our porting guide explains how the process works and how long it usually takes.

Why this matters before 2027

There is a fixed reason to sort your numbers out sooner rather than later. The UK's old landline network, the PSTN, is being switched off on 31 January 2027, after which the copper-based phone lines stop working and every business needs an internet-based phone service instead. Moving your 028 number onto a cloud system now means you do it on your own timetable and the number is then unaffected by the switch-off. Our guide to the 2027 switch-off sets out exactly what the change means for a business. For the wider local picture, see our hub on business phone systems in Northern Ireland.