LL21 postcode district: Wales
LL21 is a postcode district in Wales, with 368 postcodes in use in 2 sectors. It is split between 3 councils: Denbighshire (276 postcodes), Conwy (80) and Gwynedd (12).
- Postcodes in use
- 368
- Sectors
- 2
- Councils
- 3 councils
- Places
- None listed
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources
Every postcode in LL21, and which are new since 2020
- New since 2020: 2
- In use before 2020: 366
Of the 368 postcodes in LL21 that ONS places, 2 are new since 2020 and 366 were in use before 2020.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
The middle of its postcodes: latitude 52.9900, longitude -3.4110. Open this area on OpenStreetMap
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them
The 2 newest postcodes
What broadband can you get in LL21?
Ofcom reports on 367 of the 368 postcodes in LL21. At 170 of them every home and business can get gigabit broadband, and at 34 some cannot get decent broadband (10 Mbit/s).
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it
What do homes sell for in LL21?
Homes in LL21 sold for a typical £190,000 in the 12 months to August 2026, across 53 sales, down 24% on the 12 months before, HM Land Registry's figures show.
- Detached £292,500 32 sales
- Semi-detached £155,000 7 sales
- Terraced £155,000 14 sales
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it
Postcodes in LL21
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in LL21
We list no town or village for LL21. A place gets a page here only when enough postcodes are in one: a town or village here is a built-up area named by the Office for National Statistics in England and Wales, or a census locality named by National Records of Scotland. Every LL21 postcode is here, under its sector above.
Who covers LL21
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
- Denbighshire276
- Conwy80
- Gwynedd12
Constituencies
- Dwyfor Meirionnydd209
- Bangor Aberconwy108
- Clwyd East51
Police force areas
- North Wales368
Next to LL21
"Next to" is by number: the districts before and after LL21 in the LL area.
Check a postcode
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