Use this guide to understand BT1 1DD in Northern Ireland. Start with the interactive location and approximate postcode outline, then browse the available facts and local-area indicators. Labels show which figures relate to the exact postcode and which cover a larger geography.
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Create a Custom MapCore details from the ONS Postcode Directory. Geography codes identify the official areas containing this postcode.
| Postcode | BT1 1DD |
| Postcode without spaces | BT11DD |
| Status | Active postcode |
| User type | Small user postcode |
| Introduced | January 1991 |
| Directory version | 2026-06 |
| Latitude | 54.6006100 |
| Longitude | -5.9342700 |
| British National Grid | 333,548 E, 374,449 N |
| Country | Northern Ireland |
| Output Area (2021) | N20001079 |
| LSOA (2021) | N21000251 |
| MSOA (2021) | N99999999 |
| Electoral ward | N08000315 |
| Westminster constituency | N05000003 |
The postcode is assigned to these official political geographies. Names and election results will be added when the ElectionMaps datasets are connected.
A detailed vector map covering a 500 metre radius around the postcode.
Companies House records whose registered-office address uses this exact postcode.
Private Limited Company
Incorporated 5 May 2026
56102 - Unlicensed restaurants and cafes
Private Limited Company
Incorporated 9 April 2026
96020 - Hairdressing and other beauty treatment
Private Limited Company
Incorporated 30 May 2025
46190 - Agents involved in the sale of a variety of goods
Private Limited Company
Incorporated 23 April 2024
47599 - Retail of furniture, lighting, and similar (not musical instruments or scores) in specialised store
Private Limited Company
Incorporated 3 January 2024
56102 - Unlicensed restaurants and cafes
Private Limited Company
Incorporated 8 December 2023
56103 - Take-away food shops and mobile food stands
Private Limited Company
Incorporated 6 December 2023
56102 - Unlicensed restaurants and cafes
Private Limited Company
Incorporated 31 July 2023
46190 - Agents involved in the sale of a variety of goods
Private Limited Company
Incorporated 22 September 2021
64209 - Activities of other holding companies n.e.c.
Private Limited Company
Incorporated 22 September 2021
46190 - Agents involved in the sale of a variety of goods
Private Limited Company
Incorporated 18 November 2020
46470 - Wholesale of furniture, carpets and lighting equipment
Private Limited Company
Incorporated 25 March 2019
47240 - Retail sale of bread, cakes, flour confectionery and sugar confectionery in specialised stores
Answers use the geographic scope stated with each dataset above.
BT1 1DD is in Northern Ireland.
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Explore other full postcodes in the same postcode sector.