LL51 postcode district: Gwynedd

LL51 is a postcode district in Wales, with 45 postcodes in use in 1 sector. Its council is Gwynedd.

Postcodes in use
45
Sectors
1
Council
Gwynedd
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 LL51, by gigabit broadband

Map of every postcode in LL51, by gigabit broadband Of the 45 postcodes in LL51 that ONS places, 20 have no home or business that can get gigabit, 18 have some that can and 7 can all get it. One group of postcodes without gigabit is outlined: 16 postcodes without gigabit. Places named: Dolbenmaen, Clynnog. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A487 LL51 9DZ: gigabit for allLL51 9EQ: gigabit for allLL51 9HX: gigabit for allLL51 9LJ: gigabit for allLL51 9RJ: gigabit for allLL51 9YY: gigabit for allLL51 9AJ: some gigabitLL51 9AQ: some gigabitLL51 9AX: some gigabitLL51 9AZ: some gigabitLL51 9BQ: some gigabitLL51 9DJ: some gigabitLL51 9DQ: some gigabitLL51 9EJ: some gigabitLL51 9EX: some gigabitLL51 9EZ: some gigabitLL51 9HZ: some gigabitLL51 9LQ: some gigabitLL51 9PJ: some gigabitLL51 9RQ: some gigabitLL51 9TJ: some gigabitLL51 9UX: some gigabitLL51 9YT: some gigabitLL51 9YU: some gigabitLL51 9DX: no gigabitLL51 9LX: no gigabitLL51 9LZ: no gigabitLL51 9NJ: no gigabitLL51 9NQ: no gigabitLL51 9PQ: no gigabitLL51 9RZ: no gigabitLL51 9SZ: no gigabitLL51 9TQ: no gigabitLL51 9TX: no gigabitLL51 9TZ: no gigabitLL51 9UJ: no gigabitLL51 9UQ: no gigabitLL51 9AL: no gigabit DolbenmaenClynnog 16 postcodes without gigabit, outlined: this goes to LL51 9SQ, the one nearest the middle of them16 postcodes without gigabit Map of every postcode in LL51, by gigabit broadband Of the 45 postcodes in LL51 that ONS places, 20 have no home or business that can get gigabit, 18 have some that can and 7 can all get it. One group of postcodes without gigabit is outlined: 16 postcodes without gigabit. Places named: Dolbenmaen, Clynnog. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. DolbenmaenClynnog 16 postcodes without gigabit, outlined: this goes to LL51 9SQ, the one nearest the middle of them16 postcodes without gigabit
  • No home or business can get gigabit: 20
  • Some can get gigabit: 18
  • Every home and business can get gigabit: 7
  • Ofcom gives no figure: 0
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 45 postcodes in LL51 that ONS places, 20 have no home or business that can get gigabit, 18 have some that can and 7 can all get it.

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. A dashed outline shows where 5 or more lie within 600 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

The middle of its postcodes: latitude 52.9740, longitude -4.2390. 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; gigabit: Ofcom, Connected Nations, Spring 2026; 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

Postcodes without gigabit

20 postcodes here have no gigabit. These are the 12 first in postcode order.

LL51 9ALLL51 9DXLL51 9LXLL51 9LZLL51 9NJLL51 9NQLL51 9NXLL51 9NZLL51 9PQLL51 9RXLL51 9RZLL51 9SJ

Where the postcodes without gigabit lie together

  • 16 postcodes without gigabit, outlined on the map. LL51 9SQ, is the one nearest the middle of them.

What broadband can you get in LL51?

Ofcom reports on 45 of the 45 postcodes in LL51. At 7 of them every home and business can get gigabit broadband, and at 7 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit7 of 45
Postcodes where every home can get superfast22 of 45
Postcodes where some cannot get decent broadband7 of 45

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 checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

What do homes sell for in LL51?

HM Land Registry records 4 sales of homes in LL51 in the 12 months to August 2026: too few to give a typical price.

Detached 1 sale, too few to price
Semi-detached 1 sale, too few to price
Terraced 2 sales, too few to price

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 LL51

Pick a sector, then a postcode. A sector is the district plus the next digit.

LL51 945 postcodes
UK postcode format explained

Places in LL51

We list no town or village for LL51. 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 LL51 postcode is here, under its sector above.

Who covers LL51

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Dwyfor Meirionnydd45

Police force areas

  • North Wales45

Next to LL51

LL49 postcode district LL52 postcode district All LL districts

"Next to" is by number: the districts before and after LL51 in the LL area.

Check a postcode

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