SA45 postcode district

Postcodes and sectors

94 of the district's 104 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 52.20815, -4.35829, which locates the district, not a building.

Companies registered in SA45

Companies House lists 60 companies with a registered office in SA45 (1 October 2026 snapshot).

Places OS Open Names lists for SA45

• Sir Ceredigion
• Ceredigion
• Wales
• Ceinewydd
• New Quay
• Maen-y-groes
• Gilfachreda
• Nanternis
• Cei-bach

Roads filed under SA45

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.

• Albion Terrace
• Beili
• Bro Gido
• Brongwyn
• Church Road
• Church Street
• Cwm-Halen
• Cwm Ifor
• Cylch y Llan
• Dolphin Court
• Ffordd Newydd
• Ffordd Towyn
• Field Place
• Francis Street
• George Street
• Gerddi'r Ffynnon
• Glan Dolau
• Glanmor Terrace
• Glyn Square
• Gomer Crescent
• Hengell Uchaf
• Heol Pengraig
• Heol y Cwm
• Heol y Frenhines
• Heol y Parc
• Heol yr Eglwys
• High Street
• High Terrace
• Hill Street
• Lewis Terrace
• Llanwern
• Lle'r Gwylwyr
• Llys Derwen
• Lon Traethgwyn
• Lôn y Peilad Pilot Lane
• Maes yr Odyn
• Margaret Street
• Marine Terrace
• Mason's Square
• Nant Ifan
• New Road
• Park Street
• Penrhiw Pistyll Lane
• Penwig Fields
• Penwig Lane
• Picton Crescent
• Picton Terrace
• Porth-yr-Eglwys
• Prospect Place
• Queen Street
• Rectory Square
• Rhes Glanmor
• Rhes y Morwyr
• Rhodfa'r Wawr
• Rock Street
• Sgwar Ucheldir
• Sgwar y Seiri
• South John Street
• Spring Gardens
• Stryd Bethel

Check an address in SA45

Check an address in SA45

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SA45" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SA45

What does an SA45 postcode tell you?

That the address lies in the SA45 district of the SA (Swansea) postcode area, and the place OS Open Names most often lists first for its postcodes is Ceinewydd. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 94 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 SA45

• SA474.4 km
• SA467.6 km
• SA4413.5 km
• SA4818.1 km
• SA4018.6 km
• SA3820.4 km
• SA3922.5 km
• SA4322.8 km
• SA3726.7 km
• SY2328.2 km
• SY2528.9 km
• SA3632.7 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids