LL55 postcode district

Postcodes and sectors

741 of the district's 993 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 53.13405, -4.20401, which locates the district, not a building.

Companies registered in LL55

Companies House lists 686 companies with a registered office in LL55; 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 LL55

• Gwynedd
• Wales
• Caernarfon
• Llanberis
• Llanrug
• Deiniolen
• Bethel
• Waunfawr
• Cwm-y-glo
• Beddgelert
• Clwt-y-bont
• Caeathro
• Brynrefail
• Bontnewydd
• Penisa'r Waun
• Seion
• Dinorwig
• Groeslon
• Tan-y-coed
• Nant Peris
• Waun
• Pont-Rhythallt
• Gallt-y-foel
• Nantgwynant

Roads filed under LL55

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.

• Ael-y-Garth
• Ael Y Bryn
• Ala Las
• Allt Cadnant
• Allt Goch
• Allt Pafiliwn
• Allt y Castell
• Assheton Terrace
• Back New Street
• Balaclafa
• Balaclava Road
• Bangor Road
• Bangor Street
• Bank Quay
• Bethel Road
• Bethesda Street
• Bont Bridd
• Bridge Street
• Bro Eglwys
• Bro Helen
• Bron-y-Garth
• Bron Gwynedd
• Bron Rhythallt
• Bro Waun
• Bryn Crwn
• Bryn Eglwys
• Bryn Eilian
• Brynffynnon
• Bryn Goleu
• Bryn Hyfryd
• Bryn Moelyn
• Bryn Rhos
• Bryn Teg
• Bryn Tirion
• Cae'r Eglwys
• Cae'r Saint
• Cae'r Ymryson
• Cae'r Ysgol
• Caeathro Bach
• Caeau Bach
• Cae Berllan
• Cae Bold
• Cae Capel
• Cae Corn Hir
• Cae Garw Road
• Cae Groes
• Cae Gwyn
• Cae Llwybr
• Cae Mory's
• Cae Mur
• Caer Garreg
• Caernarfon Road
• Cae Ty Capel
• Cambell Road
• Capel-Coch Road
• Castle Ditch
• Castle Hill
• Castle Square
• Castle Street
• Cefn Cadnant

Check an address in LL55

Check an address in LL55

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL55" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL55

What does an LL55 postcode tell you?

That the address lies in the LL55 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is Caernarfon. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 741 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 LL55

• LL565.6 km
• LL617.9 km
• LL5410.1 km
• LL5710.1 km
• LL6010.2 km
• LL5911.6 km
• LL6214.8 km
• LL7715.8 km
• LL7516.8 km
• LL5817.9 km
• LL5118.0 km
• LL7618.7 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids