87% of homes and businesses in Cardiff can get full fibre broadband, above the UK figure of 81%. That's up 5.5 points in a year: 10,753 more premises can now order it. 837 still can't get 10 Mbit/s from a fixed line.
Fastest download speed available, share of all 172,880 premises (homes and businesses), January 2026.
Share of premises that can order full fibre (and gigabit, which also counts cable).
Full fibre Gigabit-capable (incl. cable)
| Cardiff | Wales | UK | |
|---|---|---|---|
| Full fibre | 87% | 80.8% | 81% |
| Gigabit-capable | 94.4% | 83.1% | 87.8% |
| Superfast (30 Mbit/s+) | 98.1% | 96.5% | 97.7% |
| Can't get 10 Mbit/s | 0.5% | 1.5% | 0.7% |
Cardiff ranks 109th of 361 UK council areas for full fibre coverage (see all).
17,103 of 186,455 premises in BDUK's records (9.2%) can't get a gigabit-capable connection yet. Here's what's planned for them.
Contracted build here is due to finish by September 2030.
Average across each district's postcodes. Tap a column to sort.
| CF3 | 94% | 98% | 0.2% | 921 |
|---|---|---|---|---|
| CF5 | 93% | 99% | 0.2% | 1431 |
| CF10 | 72% | 81% | 6.7% | 599 |
| CF11 | 89% | 98% | 0.8% | 792 |
| CF14 | 94% | 98% | 0.7% | 1608 |
| CF15 | 82% | 98% | 0.3% | 498 |
| CF23 | 94% | 98% | 1.4% | 879 |
| CF24 | 95% | 98% | 0.4% | 1039 |
87% of premises in Cardiff could order full fibre in January 2026, and 94.4% could get gigabit speeds (full fibre or cable). Coverage varies street by street, so check your postcode.
Full fibre coverage in Cardiff went from 81.5% in January 2025 to 87% in January 2026: 10,753 more premises.
837 premises in Cardiff (0.5%) can't get 10 Mbit/s download speeds from a fixed line, and 4 can't get what Ofcom calls decent broadband from a fixed line or fixed wireless.
About 45% of premises that can get full fibre in Cardiff have taken it up. The rest are still on older copper or cable lines, often paying similar prices for slower speeds.
17,103 premises in Cardiff can't get gigabit broadband yet. 2,929 are in a provider's own build plans, 422 are in a government Project Gigabit contract due to finish by September 2030, and 13,752 have no plan yet (May 2026). Enter your postcode above to see what's planned where you live.
Of the 8 postcode districts we cover for Cardiff, CF24 has the most gigabit coverage (95% on average) and CF10 the least (72%).
100% of premises in Cardiff have outdoor 5G coverage from at least one mobile network (Ofcom, high-confidence predictions, January 2026). 4G indoors from all four networks reaches 98%.