LL42 postcode district

Postcodes and sectors

151 of the district's 184 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 52.72577, -4.05540, which locates the district, not a building.

Companies registered in LL42

Companies House lists 88 companies with a registered office in LL42 (1 October 2026 snapshot).

Places OS Open Names lists for LL42

• Gwynedd
• Wales
• Abermaw
• Barmouth
• Llanaber
• Cutiau

Roads filed under LL42

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.

• Beach Road
• Bennar Lane
• Bryn Mynach Road
• Cae Roger
• Cambrian Street
• Ceilwart Lane
• Church Street
• Cumberland Lane
• Dinas Oleu Lane
• Ffordd Bro Mynach
• Ffordd Bryn Mynach
• Ffordd Dyrpac
• Ffordd Gellfechan
• Ffordd Llwyn Mynach
• Ffordd Mynach
• Ffordd Pentre Mynach
• Ffordd yr Orsaf
• Ffordd yr Ysgol
• Ffridd Elin
• Gellfechan Road
• Gibralter Lane
• Gloddfa Road
• Harbour Lane
• Heol-y-Llan
• Heol-y-Plas
• Heol-y-Sarn
• Heol Idris
• Heol Llewelyn
• Heol Meirion
• High Street
• Idris Lane
• Jubilee Road
• King Edward's Street
• Kings Crescent
• Marine Gardens
• Marine Parade
• Marine Place
• Marine Road
• Monks Vale Road
• Mynach Road
• North Avenue
• Northfield Road
• Panorama Walk
• Park Road
• Princes Avenue
• South Avenue
• Station Road
• St Johns Hill
• Stryd Fawr
• Stryd yr Eglwys
• Swn y Dail
• Swn y Môr
• Tai'r Heli
• Water Street
• Wellington Terrace
• A496

Check an address in LL42

Check an address in LL42

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL42" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL42

What does an LL42 postcode tell you?

That the address lies in the LL42 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is Abermaw. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 151 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 LL42

• LL393.4 km
• LL383.4 km
• LL436.0 km
• LL376.9 km
• LL447.8 km
• LL4511.1 km
• LL4012.7 km
• LL3613.5 km
• LL4614.8 km
• LL4719.6 km
• LL3519.9 km
• SY2020.2 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids