BT - Belfast
The postal area BT (Belfast) comprises of the following post towns; these towns should be written in capital letters when used in addresses.
Postal Districts within BT - Belfast
| Country | Post Town | Postal District |
| Northern Ireland | Belfast | BT1 BT2 BT3 BT4 BT5 BT6 BT7 BT8 BT9 BT10 BT11 BT12 BT13 BT14 BT15 BT16 BT17 |
| Holywood | BT18 | |
| Bangor | BT19 BT20 |
|
| Donaghadee | BT21 | |
| Newtownards | BT22 BT23 |
|
| Ballynahinch | BT24 | |
| Dromore | BT25 | |
| Hillsborough | BT26 | |
| Lisburn | BT27 BT28 |
|
| Belfast Crumlin |
BT29 | |
| Downpatrick | BT30 | |
| Castlewellan | BT31 | |
| Banbridge | BT32 | |
| Newcastle | BT33 | |
| Newry | BT34 BT35 |
|
| Newtownabbey | BT37 | |
| Carrickfergus | BT38 | |
| Ballyclare | BT39 | |
| Larne | BT40 | |
| Antrim | BT41 | |
| Ballymena | BT42 BT43 BT44 |
|
| Magherafelt | BT45 | |
| Maghera | BT46 | |
| Derry | BT47 BT48 |
|
| Limavady | BT49 | |
| Coleraine | BT51 BT52 |
|
| Ballymoney | BT53 | |
| Ballycastle | BT54 | |
| Portstewart | BT55 | |
| Portrush | BT56 | |
| Bushmills | BT57 | |
| NI Businesses | BT58 | |
| Armagh | BT60 BT61 |
|
| Craigavon | BT62 BT63 BT64 BT65 BT66 BT67 |
|
| Caledon | BT68 | |
| Aughnacloy | BT69 | |
| Dungannon | BT70 BT71 |
|
| Enniskillen | BT74 | |
| Fivemiletown | BT75 | |
| Clogher | BT76 | |
| Augher | BT77 | |
| Omagh | BT78 BT79 |
|
| Cookstown | BT80 | |
| Castlederg | BT81 | |
| Strabane | BT82 | |
| Enniskillen | BT92 BT93 BT94 |
