What does a CH70 postcode tell you?

That the address lies in the CH70 district of the CH (Chester) postcode area, and the place OS Open Names most often lists first for its postcodes is Chester. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 42 live postcodes.

CH70 postcode district

CH70, in the CH (Chester) postcode area, has 42 live and 9 terminated postcodes in the ONS Postcode Directory of August 2026, and OS Open Names files 2 roads under it.

postcode area	CH (Chester)
live postcodes	42
terminated postcodes	9
sectors	1
roads listed	2
centroid	53.19277, -2.92257
directory release	2026-08

Postcodes and sectors

42 of the district's 51 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 53.19277, -2.92257, which locates the district, not a building.

sector	live	terminated
CH70 8	42	9

Places OS Open Names lists for CH70

Chester
Cheshire West and Chester
North West

Roads filed under CH70

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.

Jupiter Drive
Sovereign Way

Check an address in CH70

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=CH70" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about CH70

What does a CH70 postcode tell you?: That the address lies in the CH70 district of the CH (Chester) postcode area, and the place OS Open Names most often lists first for its postcodes is Chester. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 42 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 CH70

CH11.4 km
CH883.2 km
CH43.4 km
CH24.5 km
CH37.5 km
CH58.0 km
CH669.5 km
CH659.5 km
LL1212.5 km
CH6413.5 km
CH714.2 km
WA615.8 km
Every district
How a British address is written
Check any address

distance between the districts' centroids

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