What does a CB9 postcode tell you?

That the address lies in the CB9 district of the CB (Cambridge) postcode area, which the directory places around Eastern. The inward half of the full postcode narrows it to a street or a building; the district alone does not, and an address written with a district and no inward half cannot be checked against the register.

Does a street listed here mean an address on it exists?

It means OS Open Names lists a road of that name under the district, which is what the address lookup answers as a street-level match. It says nothing about any building on it: Great Britain publishes no open register of buildings, so the lookup answers exists: null there and confirms the street alone.

Who lives at these postcodes?

Nobody on this page. A postcode directory says whether a code is in use, never who is there, and a streets register lists roads, not occupants. The address lookup carries no field about a person and never will.

CB9 postcode district

What the public directories installed here say about the CB9 postcode district: how many of its postcodes are in use, the places OS Open Names lists for them, the streets it files under the district and the district's centroid. Counted from the national postcode directory and OS Open Names on 2026-09-18, and never about who is at an address.

postcode area	CB (Cambridge)
live postcodes	843
terminated postcodes	196
streets listed	520
centroid	52.08371, 0.43970
counted on	2026-09-18

Places the directory lists for CB9

OS Open Names places the district's postcodes in these settlements, boroughs, counties and regions, most often first. A town written as any of them matches the directory in an address lookup, and one written as another place in the CB area is reported but not scored.

Eastern
West Suffolk
Suffolk
Haverhill
Braintree
Essex
Kedington
Steeple Bumpstead
Sturmer
Withersfield
Great Thurlow
Helions Bumpstead
Great Wratting
Little Bradley
Barnardiston
Little Thurlow Green
Pale Green
Little Thurlow
Sowley Green
Little Wratting
Wiggens Green
Broad Green
Smith's Green
Friars Mead

Postcodes in use

843 postcodes in CB9 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 196 of its 1,039 postcodes have been terminated: a real address written with one has moved on, which is not the same thing as a typo, and the address lookup scores it rather than refusing it.

Centroid: 52.08371, 0.43970 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under CB9

OS Open Names files 520 roads under CB9. 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.

A143
A1017
A1307
Abbotts Court
Abbotts Road
Aldeburgh Close
Alde Road
Alderton Close
Allington Walk
Amey Close
Anglian Place
Ann Coles Close
Anne Sucklings Lane
Anning Way
Antonia Close
Apple Acre Road
Aragon Road
Archer Way
Arms Lane
Arrendene Road

the first 20 of 520, alphabetically

Check an address in CB9

The address checker opens on Great Britain with the district in the field: add the street, the number and the full postcode, and it answers the postcode's status, whether the street is filed under the district, and what kind of delivery point the address names.

Check an address in CB9

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London CB9 …", "country": "GB"}'

Common questions about CB9

What does a CB9 postcode tell you?: That the address lies in the CB9 district of the CB (Cambridge) postcode area, which the directory places around Eastern. The inward half of the full postcode narrows it to a street or a building; the district alone does not, and an address written with a district and no inward half cannot be checked against the register.
Does a street listed here mean an address on it exists?: It means OS Open Names lists a road of that name under the district, which is what the address lookup answers as a street-level match. It says nothing about any building on it: Great Britain publishes no open register of buildings, so the lookup answers exists: null there and confirms the street alone.
Who lives at these postcodes?: Nobody on this page. A postcode directory says whether a code is in use, never who is there, and a streets register lists roads, not occupants. The address lookup carries no field about a person and never will.

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.

Data synced on 2026-09-18: the newest register or postcode directory copy installed here.

Other districts in CB

Wrong result, or is it about you? If this tool said something you think is wrong, tell us and a person reads it. If Spaw is holding data about you and you never signed up here — a customer may have had your address verified, or reported that a message to it bounced — erase it yourself, confirmed by mail to that address and with no account needed.

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