BL4 postcode district

Postcodes and sectors

850 of the district's 1,076 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 53.54637, -2.40185, which locates the district, not a building.

Companies registered in BL4

Companies House lists 2,447 companies with a registered office in BL4; 666 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 BL4

• Bolton
• North West
• Farnworth
• Kearsley
• Middle Hulton
• Clifton
• Horwich

Roads filed under BL4

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.

• Albert Grove
• Albert Road
• Albert Street
• Albion Hall Place
• Albion Street
• Alderbank Close
• Alexandra Road
• Alexandra Street
• Alfred Street
• All Saints
• Alma Street
• Almond Street
• Anchor Lane
• Ann Street
• Arncliffe Close
• Arthur Street
• Ashby Close
• Ashley Grove
• Ash Road
• Ashworth Street
• Aster Avenue
• Avondale Road
• Avon Road
• Back Darley Street
• Back Young Street
• Baker Street
• Balmoral Road
• Bankfield Road
• Bank Street
• Barbury Court
• Bark Street
• Barncroft Road
• Barnes Close
• Barnes Drive
• Barnes Street
• Barrett Avenue
• Barton Road
• Barton Street
• Barton Walk
• Barwell Square
• Beatrice Street
• Beech Avenue
• Begonia Avenue
• Bentham Close
• Bentinck Street
• Bentley Court
• Bentley Street
• Bent Spur Road
• Bent Street
• Bingley Walk
• Birch Mews
• Birch Road
• Black Horse Street
• Blair Street
• Blindsill Road
• Blofield Court
• Bloomfield Road
• Bollin Close
• Bolton Road
• Brackleys Street

Check an address in BL4

Check an address in BL4

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=BL4" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about BL4

What does a BL4 postcode tell you?

That the address lies in the BL4 district of the BL (Bolton) postcode area, and the place OS Open Names most often lists first for its postcodes is Farnworth. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 850 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 BL4

• BL781.6 km
• M382.1 km
• BL32.8 km
• BL113.3 km
• M283.5 km
• BL24.7 km
• M264.8 km
• M295.6 km
• BL15.7 km
• M275.8 km
• M466.4 km
• M457.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids