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Ofcom data · 4 districts

Cardiff broadband coverage

Full-fibre, gigabit and superfast availability across Cardiff, plus business broadband and leased-line options for local firms.

Excellent coverage

Superfast (30Mb+)

94%

Ultrafast (300Mb+)

87.4%

Gigabit-capable

86.2%

Below USO (10Mb)

0.1%

Check broadband at your exact Cardiff postcode

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

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Broadband in Cardiff

Cardiff spans the CF10, CF11, CF14, CF24 postcode districts. Across the area, superfast broadband (30 Mbit/s+) reaches around 94% of premises and gigabit-capable connections are available to roughly 86.2%, based on Ofcom Connected Nations data. Coverage is strongest in central districts and thins towards the edges — check the district breakdown below, or run a postcode-level check for the definitive answer at your address.

Cardiff districts compared

DistrictAreaSuperfastGigabit
CF14Caerphilly98.2%89.3%
CF24Cardiff98.6%95.2%
CF11Cardiff98.3%89.6%
CF10Cardiff80.9%70.7%

Business broadband & leased lines in Cardiff

Connection Technologies arranges business broadband, full-fibre (FTTP), leased lines and VoIP for firms across Cardiff. Where gigabit full fibre is live we quote ultrafast symmetric connections; everywhere else a leased line still guarantees the speed and SLA your business depends on. We also handle mobile coverage for the same site.

Get a business broadband quote in Cardiff

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

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See all Cardiff (CF) broadband coverage ›

Frequently asked questions

What broadband speeds are available in Cardiff?
In Cardiff, superfast broadband (30 Mbit/s+) is available to approximately 94% of premises and gigabit-capable broadband to around 86.2%, 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 Cardiff?
Gigabit-capable coverage in Cardiff stands at about 86.2% 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 Cardiff?
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 Cardiff?
Most UK providers serve Cardiff 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.

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