LL18 postcode district

Postcodes and sectors

1,223 of the district's 1,653 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 53.31021, -3.47585, which locates the district, not a building.

Companies registered in LL18

Companies House lists 1,288 companies with a registered office in LL18; 48 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 LL18

• Wales
• Sir Ddinbych
• Denbighshire
• Rhyl
• Conwy
• Kinmel Bay
• Bae Cinmel
• Rhuddlan
• Dyserth
• Bodelwyddan
• Sir y Fflint
• Flintshire
• Trelawnyd
• Gwaenysgor
• Prestatyn
• Cwm
• Terfyn
• Marian
• Towyn
• Meliden
• Gallt

Roads filed under LL18

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.

• Abbey Road
• Abbey Street
• Aber Clwyd
• Abergele Road
• Admiral's Walk
• Albert Street
• Alder Court
• Aled Avenue
• Aled Gardens
• Alexander's Way
• Alexandra Road
• Allt y Graig
• Aquarium Crescent
• Aquarium Street
• Arfon Grove
• Argoed
• Arnold Gardens
• Arran Drive
• Artillery Row
• Ascot Drive
• Ash Court
• Ash Grove
• Aspen Grove
• Aspen Walk
• Astley Court
• Avondale Drive
• Balmoral Grove
• Barrfield Close
• Barrfield Road
• Barry Road North
• Barry Road South
• Bath Street
• Bedford Street
• Beech Avenue
• Beechwood Road
• Berllan Avenue
• Berwyn Crescent
• Betws Avenue
• Birch Grove
• Bodannerch Drive
• Bodelwyddan Avenue
• Bodfor Street
• Bod Llewelyn
• Bodrhyddan Avenue
• Boughton Avenue
• Brandon Court
• Brickfield Park
• Bridge Bussiness Park
• Bridgegate Road
• Bridge Street
• Brighton Road
• Bro Deg
• Bron Deg
• Bron Haul
• Bronwen Avenue
• Brookdale Road
• Brookes Avenue
• Bryn-Llys
• Bryn-y-Felin
• Bryn Afon

Check an address in LL18

Check an address in LL18

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL18" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL18

What does an LL18 postcode tell you?

That the address lies in the LL18 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is Rhyl. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,223 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 LL18

• LL194.9 km
• LL176.9 km
• LL229.4 km
• LL1614.2 km
• CH815.5 km
• LL2915.6 km
• LL2819.2 km
• CH4821.4 km
• LL3122.3 km
• CH4722.5 km
• LL3022.6 km
• CH623.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids