B1 postcode district

Postcodes and sectors

319 of the district's 744 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 52.47971, -1.90949, which locates the district, not a building.

Companies registered in B1

Companies House lists 5,755 companies with a registered office in B1; 3,216 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 B1

• Birmingham
• West Midlands

Roads filed under B1

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.

• Acorn Grove
• Albion Street
• Albon Mews
• Anderton Street
• Arena Walk
• Arthur Place
• Beak Street
• Berkley Street
• Blucher Street
• Bow Street
• Bridge Street
• Brindley Drive
• Broad Street
• Brownsea Drive
• Brunel Street
• Brunswick Square
• Brunswick Street
• Cambridge Street
• Camden Drive
• Camden Grove
• Camden Street
• Carver Street
• Chapmans Passage
• Civic Close
• Clement Street
• Commercial Street
• Crosby Close
• Cumberland Street
• Daley Close
• Edward Street
• Ellis Street
• Ernest Street
• Exeter Street
• Florence Street
• Frederick Street
• Gas Street
• Goodman Street
• Gough Street
• Graham Street
• Granville Street
• Helena Street
• Holliday Passage
• Holliday Street
• Holloway Circus Queensway
• Holloway Head
• Horse Fair
• Irving Street
• James Brindley Walk
• John Bright Street
• Kelsall Croft
• King Edward's Road
• Kingston Row
• Legge Lane
• Louisa Street
• Lower Severn Street
• Mailbox Square
• Marshall Street
• Moreton Street
• Nelson Street
• Newhall Hill

Check an address in B1

Check an address in B1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=B1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about B1

What does a B1 postcode tell you?

That the address lies in the B1 district of the B (Birmingham) postcode area, and the place OS Open Names most often lists first for its postcodes is Birmingham. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 319 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 B1

• B30.6 km
• B21.2 km
• B41.3 km
• B51.4 km
• B181.7 km
• B161.7 km
• B151.8 km
• B192.0 km
• B122.7 km
• B73.0 km
• B63.2 km
• B213.7 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids