CF45 postcode district

Postcodes and sectors

437 of the district's 491 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 51.66953, -3.36213, which locates the district, not a building.

Companies registered in CF45

Companies House lists 699 companies with a registered office in CF45; none of them at an address 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 CF45

• Rhondda Cynon Taf
• Wales
• Mountain Ash
• Aberpennar
• Abercynon

Roads filed under CF45

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.

• Aber-Ffrwd Road
• Abercwmboi-Isaf Road
• Abercynon Road
• Aberdare Road
• Aberpennar Street
• Albany Street
• Albert Street
• Alexandra Place
• Alexandra Terrace
• Allen Street
• Ann Street
• Argyle Street
• Arnold Street
• Arthur Street
• Ash Grove
• Austin Street
• Avondale Court
• Avondale Street
• Bagot Street
• Bailey Street
• Bassett Street
• Battenberg Street
• Beadon Street
• Beckett Street
• Bellevue Terrace
• Boi Close
• Bradley Street
• Bron - y - Deri
• Brook Street
• Bruce Street
• Brynheulog
• Bush Road
• Cadwaladr Street
• Caemaen Street
• Campbell Terrace
• Caradoc Road
• Caradoc Street
• Cardiff Road
• Cefn-Pennar Road
• Cemetery Road
• Ceridwen Street
• Chancery Lane
• Church Street
• Clarence Street
• Clas -y- Dderwen
• Clas Gwernifor
• Cliff Street
• Commercial Place
• Commercial Street
• Consort Street
• Conybeare Close
• Conybeare Street
• Coplestone Street
• Copley Street
• Cross Street
• Cwm Alarch
• Cwm Alarch Close
• Cwrtaber Gorci
• Cwrt Cwm Cynon
• Cwrt Fforest

Check an address in CF45

Check an address in CF45

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=CF45" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about CF45

What does a CF45 postcode tell you?

That the address lies in the CF45 district of the CF (Cardiff) postcode area, and the place OS Open Names most often lists first for its postcodes is Mountain Ash. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 437 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 CF45

• CF464.3 km
• CF436.3 km
• CF377.6 km
• CF488.0 km
• CF408.3 km
• CF448.6 km
• CF418.6 km
• CF828.8 km
• CF818.9 km
• CF398.9 km
• CF479.2 km
• NP2410.1 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids