What does a YO90 postcode tell you?

That the address lies in the YO90 district of the YO (York) postcode area, and the place OS Open Names most often lists first for its postcodes is York. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 10 live postcodes.

YO90 postcode district

YO90, in the YO (York) postcode area, has 10 live and 8 terminated postcodes in the ONS Postcode Directory of August 2026, and OS Open Names files 3 roads under it.

postcode area	YO (York)
live postcodes	10
terminated postcodes	8
sectors	1
roads listed	3
companies registered	54
centroid	53.95972, -1.09024
directory release	2026-08

Postcodes and sectors

10 of the district's 18 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 53.95972, -1.09024, which locates the district, not a building.

sector	live	terminated
YO90 1	10	8

Companies registered in YO90

Companies House lists 54 companies with a registered office in YO90 (1 October 2026 snapshot).

Places OS Open Names lists for YO90

York
Yorkshire and the Humber

Roads filed under YO90

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.

Rougier Street
Tanner Street
Wellington Row

Check an address in YO90

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=YO90" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about YO90

What does a YO90 postcode tell you?: That the address lies in the YO90 district of the YO (York) postcode area, and the place OS Open Names most often lists first for its postcodes is York. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 10 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 YO90

YO10.5 km
YO312.0 km
YO242.3 km
YO102.4 km
YO303.5 km
YO234.6 km
YO326.2 km
YO266.2 km
YO197.5 km
YO4112.5 km
LS2414.7 km
YO6017.2 km
Every district
How a British address is written
Check any address

distance between the districts' centroids

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