LL17 postcode district

Postcodes and sectors

235 of the district's 258 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 53.25224, -3.43695, which locates the district, not a building.

Companies registered in LL17

Companies House lists 1,639 companies with a registered office in LL17; 148 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 LL17

• Wales
• Sir Ddinbych
• Denbighshire
• St Asaph
• Llanelwy
• Nant-y-Patrick
• Tremeirchion
• Rhuallt
• Conwy
• Bont-newydd
• Waen Goleugoed
• Graig

Roads filed under LL17

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.

• Allt Goch
• Ashly Court
• Bishops Walk
• Bowen Court
• Brick Kiln Gate
• Bro Havard
• Brondyffryn
• Bronwylfa Square
• Bryn Arthur
• Bryn Coed
• Bryn Elwy
• Bryn Gobaith
• Bryn Rhosyn
• Cae Bryn
• Cae Pedr
• Cae Shon
• Cae Winefride
• Cathedral Walk
• Chester Street
• Clos Coed Ywen
• Clos Derw
• Clwydian Avenue
• Clwydian Park Avenue
• Clwydian Park Crescent
• Clwydian Park View
• Cwrt Ashly
• Cwrt Bowen
• Cwttir Lane
• Dean's Walk
• Dyffryn Teg
• Elwy Crescent
• Erw Lan
• Ffordd-y-Bryn
• Ffordd Brenig
• Ffordd Isaf Dinbych
• Ffordd Newydd
• Ffordd Richard Davies
• Ffordd Siarl
• Ffordd William Morgan
• Fron Haul
• Gemig Street
• Glascoed Road
• Groesffordd
• Hen Waliau
• Heol-y-Brenin
• Heol Afon
• Heol Celyn
• Heol Clwyd
• Heol Esgob
• High Street
• Hillside
• Holly Court
• Holywell Road
• Is Terfyn
• Keens Road
• Kentigern Court
• Llwyn Dinas Fechan
• Llwyn Elwy
• Llwyn Onn
• Llys-y-Tywysog

Check an address in LL17

Check an address in LL17

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL17" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL17

What does an LL17 postcode tell you?

That the address lies in the LL17 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is St Asaph. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 235 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 LL17

• LL186.9 km
• LL167.5 km
• LL199.0 km
• LL2210.9 km
• CH813.1 km
• LL1518.4 km
• LL2918.5 km
• CH619.5 km
• LL2822.0 km
• CH4822.1 km
• CH722.3 km
• CH4724.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids