LL77 postcode district

Postcodes and sectors

253 of the district's 378 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 53.26059, -4.31207, which locates the district, not a building.

Companies registered in LL77

Companies House lists 265 companies with a registered office in LL77; 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 LL77

• Sir Ynys Mon
• Isle of Anglesey
• Wales
• Llangefni
• Talwrn
• Rhostrehwfa
• Bodffordd
• Rhos-meirch
• Llangwyllog
• Tregaean
• Ceint
• Mona
• Capel Coch
• Glan Gors

Roads filed under LL77

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.

• Bridge Street
• Brig y Nant
• Bro Caerwyn
• Bro Ednyfed
• Bron-y-Felin Road
• Bron Dinas
• Bron Heulog
• Bro Tudur
• Bryn Hwfa
• Bryn Meurig
• Bryn Pandy
• Bulkeley Square
• Cae'r Delyn
• Cae Bach Aur
• Caer Llec
• Capel-Uchaf
• Caradog Terrace
• Chapel Street
• Church Street
• Church Terrace
• Cildwrn Road
• Cilfach Cai
• Cilfach Cwta
• Cilfach Pencae
• Cilfach y Graig
• Clos Cildwrn
• Clwch
• Cwr y Coed
• Dol Werdd
• Erwau'r Coleg
• Felin Graig
• Ffordd Cae Ddafydd
• Ffordd Caergybi
• Ffordd Cildwrn
• Ffordd Corn Hir
• Ffordd Cyngar
• Ffordd Dolafon
• Ffordd Glandwr
• Ffordd Gyswyllt Llangefni
• Ffordd Hwfa
• Ffordd Kyffin
• Ffordd Llifon
• Ffordd Maeshyfryd
• Ffordd Nant
• Ffordd Penlan
• Ffordd yr Efail
• Field Street
• Fron Road
• Ger y Winllan
• Glanhwfa Road
• Gorwel Deg
• Graig Las
• Greenfield Avenue
• High Street
• Holyhead Road
• Industrial Estate Road
• Isgraig
• Llangefni Link Road
• Llawr y Dref
• Llwybr Pren

Check an address in LL77

Check an address in LL77

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=LL77" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about LL77

What does an LL77 postcode tell you?

That the address lies in the LL77 district of the LL (Llandudno) postcode area, and the place OS Open Names most often lists first for its postcodes is Llangefni. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 253 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 LL77

• LL605.6 km
• LL766.6 km
• LL756.9 km
• LL787.1 km
• LL627.4 km
• LL617.9 km
• LL748.5 km
• LL718.6 km
• LL739.4 km
• LL5910.4 km
• LL5611.0 km
• LL7211.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids