LL40 postcode district

Postcodes and sectors

354 of the district's 411 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 52.75701, -3.87469, which locates the district, not a building.

Companies registered in LL40

Companies House lists 200 companies with a registered office in LL40; 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 LL40

• Gwynedd
• Wales
• Dolgellau
• Brithdir
• Bontddu
• Llanfachreth
• Ganllwyd
• Tabor
• Rhydymain
• Llanelltyd
• Llyn Penmaen
• Penmaenpool
• Bryn-coed-Ifor
• Abergeirw
• Pen-y-bryn

Roads filed under LL40

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.

• Aberwnion Terrace
• Ardd Fawr
• Arran Road
• Baker Street
• Bala Road
• Bridge Street
• Bryn Teg
• Bwlch y Ffordd
• Cader Road
• Cae'r Dderwen
• Cae Deintur
• Cae Idris
• Cae Tanws Bach
• Chapel Street
• Coed-y-Fronallt
• Coed y Bryn
• Dalarlas
• Derwen Deg
• Doldir
• English Terrace
• Felin Isaf
• Felin Uchaf
• Fford Cader Idris
• Ffordd-y-Marian
• Ffordd Bala
• Ffordd Bodlondeb
• Ffordd Heulog
• Ffordd Pen y Cefn
• Ffordd y Felin
• Ffos-y-Felin
• Fiddler's Elbow
• Finsbury Square
• Fox's Path
• Fron Serth
• Fronwnion
• Garreg Feurig
• Glyndwr Street
• Green Lane
• Hen Felin
• Heol-y-Capel
• Heol Glyndwr
• Heol Plas Uchaf
• Heol y Bont
• Heol y Dwr
• Hoel Feurig
• Lion Street
• Lion Yard
• Llwybr-y-Torrent
• LLwybr Cadno
• Llwybr Mawddach Trail
• Llys Owain
• Lombard Street
• Lon Popty
• Love Lane
• Lôn Las
• Maesbrith
• Maes Talaran
• Maes y Pandy
• Marian Mawr Enterprize Park
• Marian Road

Check an address in LL40

Check an address in LL40

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL40" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL40

What does an LL40 postcode tell you?

That the address lies in the LL40 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is Dolgellau. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 354 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 LL40

• LL3910.6 km
• LL4212.7 km
• LL3813.7 km
• LL4314.8 km
• LL4415.4 km
• SY2016.2 km
• LL4516.6 km
• LL3717.4 km
• LL4619.1 km
• LL4720.5 km
• LL3621.2 km
• LL4823.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids