NN1 postcode district

Postcodes and sectors

830 of the district's 1,668 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 52.24150, -0.88818, which locates the district, not a building.

Companies registered in NN1

Companies House lists 6,172 companies with a registered office in NN1; 2,584 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 NN1

• West Northamptonshire
• East Midlands
• Northampton

Roads filed under NN1

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.

• Abington Avenue
• Abington Grove
• Abington Square
• Abington Street
• Adams Avenue
• Adelaide Place
• Adnitt Road
• Albany Road
• Albert Place
• Albion Place
• Alcombe Road
• Alcombe Terrace
• Alexandra Road
• Alfred Street
• Allen Road
• Althorp Street
• Angel Street
• Ardington Road
• Artizan Road
• Arundel Street
• Ashburnham Road
• Ash Street
• Auctioneers Court
• Auctioneers Way
• Austin Street
• Bailiff Street
• Baronson Gardens
• Barrack Road
• Barry Road
• Beckets View
• Bedford Place
• Berkeley Close
• Bidders Close
• Billing Road
• Billington Street
• Birchfield Road
• Black Lion Hill
• Bostock Avenue
• Bouverie Street
• Bouverie Walk
• Bradshaw Street
• Bridge Street
• Broad Street
• Broadway
• Brookland Crescent
• Brookland Road
• Brook Street
• Brown's Way
• Brunswick Place
• Brunswick Walk
• Burns Street
• Campbell Square
• Campbell Street
• Canonbury Court
• Carey Street
• Castilian Street
• Castilian Terrace
• Castle Hill
• Castle Street
• Castle Terrace

Check an address in NN1

Check an address in NN1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=NN1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about NN1

What does an NN1 postcode tell you?

That the address lies in the NN1 district of the NN (Northampton) postcode area, and the place OS Open Names most often lists first for its postcodes is Northampton. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 830 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 NN1

• NN22.5 km
• NN43.2 km
• NN53.4 km
• NN34.0 km
• NN74.6 km
• NN610.0 km
• NN814.6 km
• NN1214.9 km
• NN2915.3 km
• MK4615.9 km
• MK1918.5 km
• NN1119.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids