BT19 6TX
0035321 + the local number
The three-letter country code for passports issued by the Republic of Ireland is IRL.
To ring a landline in Northern Ireland from the Republic of Ireland, replace the area code 028 with the special shortcut code 048. More generally, to ring any number in the UK, including a Northern Irish mobile, from the Republic of Ireland, replace the leading 0 of the UK number with 00 44.
003531
Country code +35 is assigned to Ireland.
00353
Donegal is in the Republic of Ireland, not Northern Ireland. Its area codes are 071 and 074.
BT.. ....
028.
Northern Ireland is in the UK, and the international dialling code for the UK is +44.
The telephone operator that uses the code 083 will most likely be located in the Republic of Ireland. The code 083 is used in Ireland and many other surrounding areas.