LL40 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 353 postcodes across 2 sectors in Gwynedd.
Full fibre
0%
Gigabit
42%
Superfast
80%
Postcodes
353
LL40 is Gwynedd's largest postcode district by far (353 postcodes), with moderate gigabit coverage at 42%. Rural spread defines the connectivity challenge here.
Broadband speeds in LL40
Share of LL40 premises by the fastest download speed available, averaged across all 353 postcodes in the district.
Spanning 353 postcodes, LL40 exhibits the connectivity strain of extensive rural territory. Superfast covers 80.2%, a notable fall short of national averages. Gigabit reaches just 42%, sustained by cable infrastructure (no full-fibre recorded). The speed distribution is centred on the mid-range: 38.2% sit between 30-300 Mbps, 42% access 300+ Mbps, but 7.5% languish below 10 Mbps. Nearly 3% meet or fall below the USO floor. This split reflects LL40's enormous size and varied terrain: cable deployment concentrates in denser settlements, leaving rural fringes with legacy copper or basic wireless. The cumulative effect: nearly one in ten addresses faces substandard broadband, a problem endemic to dispersed Gwynedd. Relocating to LL40 demands careful address verification.
Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.
Connectivity in detail
Below 10 Mbps USO
3%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
0%
Premises that can use a fixed wireless access service
Broadband by sector
LL40 splits into 2 postcode sectors. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.
| Sector | Postcodes | Superfast | Full fibre | Gigabit |
|---|---|---|---|---|
| LL40 1 | 166 | 96% | 0% | 27% |
| LL40 2 | 187 | 66% | 0% | 55% |
All LL40 1 postcodes (166)
All LL40 2 postcodes (187)
Best deals
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Living in Gwynedd
LL40's scale and rural character mean broadband prospects vary dramatically within the postcode district; central settlements enjoy cable gigabit, while outlying premises may struggle.
Remote worker score
52/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
LL40 broadband FAQs
Why does gigabit only reach 42% of LL40?
LL40 spans 353 postcodes across remote Gwynedd terrain. Cable infrastructure prioritises larger settlements, leaving dispersed areas on legacy networks.
How many premises in LL40 fall below 10 Mbps?
7.5% of postcodes report sub-10 Mbps speeds, a significant minority for this large district.
Is LL40 the largest Gwynedd postcode district?
Yes; at 353 postcodes, LL40 is substantially larger than most neighbouring LL codes.
Should I verify broadband before committing to a property in LL40?
Absolutely. The variance between gigabit and below-10 Mbps areas is extreme, and postcode-level checks are mandatory.
Neighbouring districts
Check your exact postcode
Every postcode in LL40 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.
Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources