SY23 postcode district

Postcodes and sectors

985 of the district's 1,284 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 52.37925, -4.05196, which locates the district, not a building.

Companies registered in SY23

Companies House lists 1,169 companies with a registered office in SY23; 43 of them at addresses 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 SY23

• Wales
• Sir Ceredigion
• Ceredigion
• Aberystwyth
• Llanbadarn Fawr
• Llanon
• Llannon
• Penrhyn-coch
• Llanrhystud
• Llanfarian
• Llanilar
• Pennant
• Pontarfynach
• Devil's Bridge
• Ponterwyd
• Blaenplwyf
• Pont Lanio
• Comins Coch
• Goginan
• Lledrod
• Llanafan
• Pentre-llyn
• Llangorwen
• Dolypandy

Roads filed under SY23

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.

• Albert Place
• Alexandra Road
• Alfred Place
• Allt-y-Clogwyn
• Antaron Avenue
• Baker Street
• Banadl Road
• Bath Street
• Bont Goch
• Boulevard St Brieuc
• Brewer Street
• Bridge Street
• Bridge Terrace
• Bro Nantcellan
• Broncynfelin
• Brongwinau
• Bronpadarn
• Bryn Ardwyn
• Brynceinion
• Bryn Eglur
• Brynglas Road
• Bryn Hyfryd
• Brynrheidol
• Bryn Road
• Brynymor Road
• Brynymor Terrace
• Bryn Ystwyth
• Buarth Road
• Cae'r-Gog
• Cae'r-Gog Terrace
• Cae'r Felin
• Cae'r Pandy
• Cae'r Wylan
• Cae'r Ysgol
• Cae Bach y Rhiw
• Cae Dan yr Haidd
• Cae Job
• Cae John
• Cae Mawr
• Cae Melyn
• Cae Ropos
• Cambrian Place
• Cambrian Square
• Cambrian Street
• Caradog Road
• Castell Brychan
• Castle Street
• Cathedral View
• Cefnesgair
• Cefnllan
• Chalybeate Street
• Church Street
• Clawdd Helyg
• Cliff Terrace
• Clos Allt Fach
• Clos Cadno
• Clos Carrog
• Clos Ceitho
• Clos Corwen
• Clos Crugiau

Check an address in SY23

Check an address in SY23

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SY23" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SY23

What does an SY23 postcode tell you?

That the address lies in the SY23 district of the SY (Shrewsbury) postcode area, and the place OS Open Names most often lists first for its postcodes is Aberystwyth. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 985 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 SY23

• SY2410.7 km
• SY2517.5 km
• LL3518.7 km
• SA4621.0 km
• LL3625.1 km
• SA4826.4 km
• SA4726.8 km
• SA4528.2 km
• SY2030.6 km
• LL3731.9 km
• SA4033.9 km
• SY1834.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids