BL1 postcode district

Postcodes and sectors

1,852 of the district's 2,895 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 53.59050, -2.44501, which locates the district, not a building.

Companies registered in BL1

Companies House lists 9,794 companies with a registered office in BL1; 4,039 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for BL1

• Bolton
• North West
• Horrocks Fold

Roads filed under BL1

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Abbotsford Road
• Abercorn Road
• Adisham Drive
• Adrian Road
• Ainslie Road
• Ainsworth Square
• Ainsworth Street
• Alan Street
• Albert Road
• Albert Road West
• Alderley Avenue
• All Saints' Street
• Almond Grove
• Almond Street
• Amblethorn Drive
• Andrew Lane
• Angelo Street
• Anson Street
• Arch Street
• Arkwright Close
• Arncot Road
• Arnold Street
• Arundel Street
• Ashbee Street
• Ashburner Street
• Ashfield Grove
• Ashford Walk
• Ash Grove
• Ashington Close
• Ash Lawns
• Ash Leigh Drive
• Ashover Close
• Ashworth Lane
• Aspen Close
• Astley Brook Close
• Astley Lane
• Astley Street
• Athlone Avenue
• Avenue Street
• Avoncliff Close
• Avondale Street
• Avon Street
• Aylesford Walk
• Back Adrian Road
• Back Adrian Road East
• Back Ainscow Street
• Back Ainsworth Street
• Back All Saints' Street
• Back America Row
• Back Anson Street
• Back Apple Terrace
• Back Arnold Street
• Back Arnold Terrace
• Back Ashbee Street
• Back Ashford Walk
• Back Ashworth Lane
• Back Astley Street
• Back Avenue Street
• Back Avondale Street
• Back Bark Street

Check an address in BL1

Check an address in BL1

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=BL1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about BL1

What does a BL1 postcode tell you?

That the address lies in the BL1 district of the BL (Bolton) postcode area, and the place OS Open Names most often lists first for its postcodes is Bolton. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,852 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest BL1

• BL112.4 km
• BL33.0 km
• BL23.3 km
• BL784.2 km
• BL74.8 km
• BL45.7 km
• BL66.3 km
• M386.6 km
• BL56.6 km
• M467.8 km
• BL87.9 km
• M267.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids