what area code is 028
UK area code 028 is for the whole of Northern Ireland including Belfast.The first two digits of the eight-digit local number indicate where in Northern Ireland it is associated with: For example, (028) 4461 0801 would be in Downpatrick, while (028) 9018 0018 is a Belfast number.ll local area codes withdrawn within Northern Ireland, replaced with single 028 code. Landline numbers lengthened to eight digits long in all areas.