LL66 postcode area guide — Isle of Anglesey
House prices, crime, broadband speeds, mobile signal, schools and demographics for the LL66 postcode district in Isle of Anglesey — every official dataset on one page.
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Where is LL66?
Broadband & internet speeds in LL66
Strong coverage
Superfast (30Mb+)
76.6%
Ultrafast (300Mb+)
76.6%
Gigabit-capable
76.6%
Below USO (10Mb)
8.8%
Broadband availability in the LL66 postcode district (Isle of Anglesey) is Strong — superfast is near-universal and gigabit is rolling out. Across the 22 postcodes Ofcom measures in LL66, superfast broadband (30 Mbit/s or faster) reaches 76.6% of premises and gigabit-capable lines are available to 76.6%.
Around 8.8% of premises in LL66 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.
Sample postcodes in LL66
| Postcode | Superfast | Gigabit |
|---|---|---|
| LL66 0AA | 80% | 80% |
| LL66 0AB | 89.5% | 89.5% |
| LL66 0AD | 100% | 100% |
| LL66 0AE | 57.7% | 57.7% |
| LL66 0AN | 33.3% | 33.3% |
| LL66 0AP | 100% | 100% |
| LL66 0AR | 100% | 100% |
| LL66 0AS | 71.4% | 71.4% |
| LL66 0AT | 100% | 100% |
| LL66 0AU | 100% | 100% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around Isle of Anglesey
Ofcom's coverage model for the wider Isle Of Anglesey district (38,436 premises):
4G indoors — all networks
69.9%
4G outdoors — all networks
97.4%
5G outdoors — all networks
—
Voice indoors — all networks
76.2%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
Who lives here? Isle of Anglesey demographics
Census 2021 figures for the wider Isle of Anglesey district (68,878 residents, 30,824 households):
| Age profile | |
|---|---|
| Under 15 | 17% |
| 15–29 | 18.6% |
| 30–44 | 15.9% |
| 45–64 | 22.1% |
| 65+ | 26.4% |
| Housing tenure | |
|---|---|
| Owner-occupied | 68.2% |
| Private rented | 15.9% |
| Social rented | 3.4% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around LL66
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Ysgol Gymuned Garreglefn | Not applicable | — | — | LL68 0PH |
| Ysgol Gymuned Llanfechell | Not applicable | — | — | LL68 0SA |
| Ysgol Gynradd Cemaes | Not applicable | — | — | LL67 0LB |
| Ysgol Syr Thomas Jones | Not applicable | — | — | LL68 9TH |
| Ysgol Gynradd Rhosybol | Not applicable | — | — | LL68 9PP |
| Ysgol Gynradd Amlwch | Not applicable | — | — | LL68 9DY |
| Ysgol Gymuned Llannerch-y-medd | Not applicable | — | — | LL71 8DP |
| Ysgol Gynradd Penysarn | Not applicable | — | — | LL69 9AZ |
Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.
Food hygiene ratings in LL66
7 rated food businesses operate in LL66. 7 hold the top rating of 5, 0 are rated 4, and none are currently rated 2 or below.
Among the 5-rated: Blas Mon, Glan Y Gors Apiaries, Llefrith Nant Dairy (Popty / Bakery), Rhyd Y Felin Catering, The Giggling Goat Farm Shop & Bakery.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in LL66
From a sample of 77 Energy Performance Certificates across 12 LL66 postcodes, the most common rating is band E (average band E). 4% of sampled homes are rated C or better.
Band C
4%
Band D
13%
Band E
34%
Band F
30%
Band G
19%
Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.
Phone area codes for Isle of Anglesey
Landlines around LL66 typically use:
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What's it like living in LL66?
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Moving to LL66? Sort your connectivity first
We arrange broadband, full-fibre, leased lines, VoIP and business mobiles across Isle of Anglesey — free, no-obligation quote.
Postcodes in LL66
Neighbouring districts
All Llandudno (LL) postcode districts ›
Frequently asked questions
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Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.