LL23 postcode district

Postcodes and sectors

199 of the district's 224 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 52.90532, -3.60186, which locates the district, not a building.

Companies registered in LL23

Companies House lists 166 companies with a registered office in LL23; 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 LL23

• Gwynedd
• Wales
• Y Bala
• Llanuwchllyn
• Llandderfel
• Llanfor
• Rhos-y-gwaliau
• Parc
• Cefn-ddwysarn
• Frongoch
• Tre'r-Llan
• Cwmtirmynach
• Bethel
• Sarnau
• Rhiwlas
• Rhyd-uchaf
• Llidiardau
• Rhosdylluan
• Llanycil

Roads filed under LL23

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.

• Adwy Wynt
• Aran Street
• Arenig Street
• Bro Eryl
• Bro Hafhesb
• Cae'r Dderwen
• Cae Croes
• Cae Gadlas
• Cae Gwalia
• Cae Gwyn
• Cambrian Terrace
• Castle Street
• Church Street
• Craig y Fron
• Cysgod y Coleg
• Dol Tryweryn
• Encil Pensarn
• Ffordd y Gerddi
• Ffrydan Road
• Forest Road
• Frongain
• Glan Tryweryn
• Heol Aran
• Heol Arenig
• Heol Berwyn
• Heol Ffrydan
• Heol Pensarn
• Heol Plasey
• Heol Tegid
• Heol y Castell
• Heol y Domen
• Heol yr Orsaf
• High Street
• Llain Deg
• Llwybr y Llan
• Lon y Domen
• Lovers' Walk
• Maes-y-Pandy
• Maes Gwyn
• Maes Tegid
• Maes Treflyn
• Maes y Bronydd
• Maes y Fron
• Maes y Gan
• Maes y Gerddi
• Maes y Priordy
• Mawnog Fach
• Mount Lane
• Mount Street
• Pensarn Road
• Plasey Street
• Rhesdai Arenig
• Rowen
• Station Road
• Stryd y Fron
• Stryd yr Eglwys
• Tegid Street
• Trafalgar Street
• Trem-y-Ffridd
• Y Parciau

Check an address in LL23

Check an address in LL23

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL23" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL23

What does an LL23 postcode tell you?

That the address lies in the LL23 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is Gwynedd. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 199 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 LL23

• LL2115.9 km
• LL2421.0 km
• LL4123.7 km
• LL4024.7 km
• LL2524.9 km
• LL2628.8 km
• LL1529.2 km
• LL2030.2 km
• LL4730.9 km
• LL2731.0 km
• LL4831.5 km
• SY2232.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids