Ofcom data · 385 postcodes

CF81 broadband coverage — Caerphilly

Full-fibre, gigabit and superfast broadband availability across the CF81 postcode district, plus business broadband and leased-line options for Caerphilly.

Strong coverage

Superfast (30Mb+)

98%

Ultrafast (300Mb+)

46.5%

Gigabit-capable

46.5%

Below USO (10Mb)

Check broadband at your exact CF81 postcode

District figures are an average — get the precise availability, full-fibre status and mobile signal for your address.

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Broadband in CF81

Broadband availability in the CF81 postcode district (Caerphilly) is Strong — superfast is near-universal and gigabit is rolling out. Across the 385 postcodes Ofcom measures in CF81, superfast broadband (30 Mbit/s or faster) reaches 98% of premises and gigabit-capable lines are available to 46.5%.

Around 0% of premises in CF81 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 CF81

Postcode	Superfast	Gigabit
CF81 8AA	100%	100%
CF81 8AB	100%	0%
CF81 8JA	100%	0%
CF81 8JB	100%	0%
CF81 8JD	100%	0%
CF81 8JE	100%	0%
CF81 8JF	100%	0%
CF81 8JG	100%	0%
CF81 8JH	100%	0%
CF81 8JJ	100%	7.7%

Business broadband & leased lines in Caerphilly

Whether the CF81 district has full fibre yet or not, we can connect your business. Where FTTP and gigabit are live we quote ultrafast full-fibre; where they aren't, a leased line still delivers guaranteed, symmetric speeds with an SLA. We also handle mobile coverage and VoIP for the same site.

Get a business broadband quote for CF81

Free, no obligation — full fibre, leased line or FTTC, matched to what's actually available at your postcode.

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Nearby CF districts

CF14 — 89.3% gigabit CF5 — 87.5% gigabit CF83 — 85.9% gigabit CF24 — 95.2% gigabit CF44 — 65.7% gigabit CF31 — 80.8% gigabit CF3 — 86.7% gigabit CF62 — 92.4% gigabit CF64 — 85.5% gigabit CF23 — 82% gigabit

See all Cardiff (CF) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the CF81 area (Caerphilly)?

In the CF81 area (Caerphilly), superfast broadband (30 Mbit/s+) is available to approximately 98% of premises and gigabit-capable broadband to around 46.5%, based on Ofcom Connected Nations data. Exact availability varies by postcode — enter your full postcode in our checker for a precise result.

Can I get full-fibre or gigabit broadband in the CF81 area (Caerphilly)?

Gigabit-capable coverage in the CF81 area (Caerphilly) stands at about 46.5% of premises. Where gigabit and full-fibre (FTTP) are live, businesses can order symmetric, low-latency connections — ideal for cloud, VoIP and multi-site working. If full fibre hasn't reached your premises yet, a leased line can still deliver guaranteed gigabit speeds.

How do I check broadband at my exact address in the CF81 area (Caerphilly)?

Use the free broadband postcode checker on this page: enter your postcode to see fixed-broadband availability, gigabit/full-fibre coverage and mobile signal for all four networks at that location, sourced from official Ofcom data.

Who provides business broadband in the CF81 area (Caerphilly)?

Most UK providers serve the CF81 area (Caerphilly) over the Openreach and (where present) CityFibre or Virgin Media networks. Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines across the area — request a quote to compare options for your postcode.

Broadband availability data © 2026 Ofcom (Connected Nations), licensed under the Open Government Licence v3.0. Figures are area averages and predictions; availability at an individual address may differ — always confirm with a postcode-level check.