LL21 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 368 postcodes across 2 sectors in Denbighshire.
Full fibre
0%
Gigabit
53%
Superfast
81%
Postcodes
368
LL21 is a small Conwy block of 368 postcodes where broadband remains rudimentary. Gigabit availability is limited to 52.9%, and below-10 Mbps shortfalls affect one in eight premises.
Broadband speeds in LL21
Share of LL21 premises by the fastest download speed available, averaged across all 368 postcodes in the district.
LL21 sits at the weaker end of the Conwy cluster. Gigabit is 52.9%, whilst superfast is 80.9%. 4G/5G is entirely absent, forcing dependence on older copper or legacy systems. Below-USO shortfalls reach 3.5%, and 11.9% fall below 10 Mbps, a pronounced tail indicating real service gaps. Speed distribution is markedly uneven: 28% sit in the 30-300 Mbps band, and nearly 12% below 10 Mbps reflect a postcode area relying on aging infrastructure. Compared to the UK's typical superfast baseline of 97%, LL21's 80.9% shows material backlog in deployment.
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
4%
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
LL21 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 |
|---|---|---|---|---|
| LL21 0 | 170 | 84% | 0% | 59% |
| LL21 9 | 198 | 79% | 0% | 47% |
All LL21 0 postcodes (170)
All LL21 9 postcodes (198)
Best deals
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Living in Denbighshire
This is a copper-dependent pocket. Households here should not assume gigabit is accessible; older lines and lack of wireless backup mean surprises are likely.
Remote worker score
51/100
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
LL21 broadband FAQs
Why is LL21 so poorly connected?
No 4G/5G deployment and no apparent cable reach mean LL21 depends entirely on aging copper networks, with minimal alternative access.
What can residents do if they're below 10 Mbps?
Contact Ofcom about USO eligibility, explore government gigabit vouchers, or check if satellite broadband (expensive) is the backup option.
Is fibre coming to LL21?
No rollout evident in current data. Wireless infrastructure would be cheaper than digging fibre; if neither arrives, speeds may stagnate.
Should I move elsewhere for broadband?
If gigabit or even solid 30 Mbps matters, LL21 poses real risk. Adjacent Conwy postcodes (LL22, LL28) show better 4G/5G coverage.
Neighbouring districts
Check your exact postcode
Every postcode in LL21 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