Cardiff broadband coverage (CF)
Full-fibre, gigabit and superfast availability across every CF postcode district in Wales — plus business broadband and leased lines.
Strong coverage
Superfast (30Mb+)
93.8%
Ultrafast (300Mb+)
67.2%
Gigabit-capable
66.4%
Below USO (10Mb)
—
Check your exact CF postcode
Area figures average a whole postcode region — get the precise availability, full-fibre status and mobile signal for your address.
Broadband across the CF area
The CF postcode area covers Cardiff and the surrounding Wales region, spanning 36 outward-code districts. Overall fixed-broadband provision across CF is strong: superfast reaches about 93.8% of premises and gigabit-capable connectivity is available to roughly 66.4%.
Availability is never uniform across a whole postcode area — city-centre CF districts are typically further ahead on full fibre than outlying towns and rural fringes. Use the district breakdown below to see how each CF outcode compares, then check an exact postcode for the definitive answer.
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CF districts compared
Each CF outward code ranked by size. Click a district for its full breakdown and a postcode-level check.
| District | Area | Superfast | Gigabit |
|---|---|---|---|
| CF14 | Caerphilly | 98.2% | 89.3% |
| CF5 | Cardiff | 98.5% | 87.5% |
| CF83 | Caerphilly | 97.8% | 85.9% |
| CF24 | Cardiff | 98.6% | 95.2% |
| CF44 | Merthyr Tydfil | 96% | 65.7% |
| CF31 | Bridgend | 97.5% | 80.8% |
| CF3 | Caerphilly | 98.1% | 86.7% |
| CF62 | Vale of Glamorgan | 96.9% | 92.4% |
| CF64 | Vale of Glamorgan | 98.1% | 85.5% |
| CF23 | Cardiff | 98.2% | 82% |
| CF37 | Caerphilly | 92.9% | 48.4% |
| CF32 | Bridgend | 92.9% | 46.4% |
| CF11 | Cardiff | 98.3% | 89.6% |
| CF48 | Caerphilly | 95.7% | 61.4% |
| CF72 | Bridgend | 94.9% | 82.4% |
| CF47 | Merthyr Tydfil | 99% | 79% |
| CF10 | Cardiff | 80.9% | 70.7% |
| CF39 | Bridgend | 98.2% | 35% |
| CF15 | Caerphilly | 96.6% | 42.8% |
| CF35 | Bridgend | 92.8% | 76.6% |
| CF40 | Rhondda Cynon Taf | 97.9% | 67.2% |
| CF63 | Vale of Glamorgan | 98.2% | 94.4% |
| CF82 | Caerphilly | 98% | 63.4% |
| CF38 | Rhondda Cynon Taf | 98.1% | 87.3% |
| CF45 | Rhondda Cynon Taf | 98.1% | 61.1% |
| CF34 | Bridgend | 94% | 87.9% |
| CF36 | Bridgend | 98.9% | 89.7% |
| CF81 | Caerphilly | 98% | 46.5% |
| CF46 | Caerphilly | 95.4% | 38.3% |
| CF42 | Rhondda Cynon Taf | 98.1% | 29.7% |
| CF33 | Bridgend | 96.2% | 74.1% |
| CF71 | Vale of Glamorgan | 91.9% | 32.8% |
| CF43 | Rhondda Cynon Taf | 97% | 6.9% |
| CF41 | Rhondda Cynon Taf | 99.3% | 36.3% |
| CF61 | Vale of Glamorgan | 96.5% | 91% |
| CF99 | Cardiff | 0% | 0% |
Business broadband & leased lines in Cardiff
Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines right across the CF area. Where gigabit full fibre is live we quote ultrafast symmetric connections; everywhere else a leased line still guarantees the speed and SLA your business needs.
Get a business broadband quote in Cardiff
Free and no obligation — matched to what's actually available at your postcode.
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Frequently asked questions
What broadband speeds are available in the CF postcode area (Cardiff)?
Can I get full-fibre or gigabit broadband in the CF postcode area (Cardiff)?
How do I check broadband at my exact address in the CF postcode area (Cardiff)?
Who provides business broadband in the CF postcode area (Cardiff)?
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.