N21 postcode district

Postcodes and sectors

558 of the district's 960 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 51.63673, -0.09968, which locates the district, not a building.

Companies registered in N21

Companies House lists 4,924 companies with a registered office in N21; 3,212 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 N21

• London
• Enfield
• Greater London
• Southgate
• Edmonton

Roads filed under N21

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.

• Anderson Close
• Arlow Road
• Arundel Gardens
• Banting Drive
• Barber Close
• Barrow Close
• Barrowell Green
• Bayliss Close
• Bazile Road
• Beaulieu Gardens
• Beechdale
• Berkeley Gardens
• Berry Close
• Beverley Close
• Blackwell Close
• Blenheim Close
• Brackendale
• Branscombe Gardens
• Bridge Gate
• Broadfields Avenue
• Broad Walk
• Broadway Mews
• Brooklands Court
• Brook Park Close
• Brookside
• Buchanan Close
• Bush Hill
• Bush Hill Road
• Byland Close
• Cadogan Gardens
• Cambridge Gardens
• Carpenter Gardens
• Carrs Lane
• Cedars Road
• Chadwick Avenue
• Chaseville Park Road
• Cheyne Walk
• Christine Worsley Close
• Church Hill
• Clarendon Way
• College Road
• Colne Road
• Compton Road
• Coombe Corner
• Corfield Road
• Cosgrove Close
• Cranleigh Gardens
• Cranwich Avenue
• Cresswell Way
• Cunard Crescent
• Deepdene Court
• Denleigh Gardens
• Devonshire Gardens
• Donovan Place
• Downes Court
• Drayton Gardens
• Elm Park Road
• Elmscott Gardens
• Elsiedene Road
• Esther Close

Check an address in N21

Check an address in N21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=N21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about N21

What does an N21 postcode tell you?

That the address lies in the N21 district of the N (North London) postcode area, and the place OS Open Names most often lists first for its postcodes is London. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 558 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 N21

• N132.1 km
• N142.2 km
• EN22.6 km
• EN12.9 km
• N93.0 km
• N183.4 km
• N113.7 km
• N224.2 km
• EN44.4 km
• N174.8 km
• EN35.1 km
• N205.2 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids