CARDIFF SOUTH AND PENARTH Broadband Coverage
Westminster parliamentary constituency · Wales · 55,450 premises
84.1% full-fibre puts CARDIFF SOUTH AND PENARTH ahead of the 81% UK average.
The verdict
CARDIFF SOUTH AND PENARTH ranks #294 of 650 constituencies for full-fibre (84.1%) and #319 for the fixed/FWA availability gap (0.0%) - those two corpus maps diverge.
Broadband Coverage in CARDIFF SOUTH AND PENARTH
Wales's CARDIFF SOUTH AND PENARTH constituency has 55,450 premises on record. The full-fibre figure is 84.1%, above-average; gigabit-capable coverage (DOCSIS 3.1 cable included) is higher at 88.8%. Superfast (30 Mbit/s or more) is at 95.7% and ultrafast (300 Mbit/s or more) at 90.2%.
On connectivity for all households, CARDIFF SOUTH AND PENARTH has near-universal fixed and fixed-wireless broadband availability: fewer than 1% of premises cannot receive a decent service. Mid-pack full-fibre at 84.1% is 3.1pp above the 81% UK average; gigabit-capable coverage is 88.8% and ultrafast 90.2%.
Where these figures come from
Figures are drawn from Ofcom's Connected Nations Spring 2026 report (January 2026 snapshot, published May 2026 (r1)), which aggregates postcode-sector data to constituency level. They represent coverage availability from at least one network operator, not the proportion of households that have subscribed to a given speed tier, nor the typical or guaranteed speeds that customers actually receive. Nearby constituencies in Wales with comparable full-fibre coverage are listed below.
Coverage Metrics
Where CARDIFF SOUTH AND PENARTH Sits Nationally
CARDIFF SOUTH AND PENARTH vs every UK parliamentary constituency
Full-fibre coverage distribution across all 650 UK constituencies. CARDIFF SOUTH AND PENARTH's 84.1% places it in the highlighted band.
84.1% Top 46% higher than 54% of 650 UK constituencies
every UK parliamentary constituency, bucketed by value
Each bar is a band; taller bars hold more UK constituencies. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source Ofcom Connected Nations Spring 2026 · January 2026 snapshot, published May 2026 (r1)
Related
Source: Source: Ofcom Connected Nations Spring 2026 (January 2026 snapshot, published May 2026 (r1)).
Nationwide constituencies with similar full-fibre or gigabit coverage
Two Ofcom peer sets for CARDIFF SOUTH AND PENARTH (mid-pack full-fibre at 84.1%), both outside Wales so the neighborhoods are not the same-nation Nearby block above.
Similar full-fibre
Nearest other-nation constituencies by full-fibre coverage (84.1% here; floor ≥5,000 premises).
Similar gigabit
Nearest other-nation constituencies by gigabit-capable coverage (88.8% here).
Frequently Asked Questions
Where does CARDIFF SOUTH AND PENARTH sit in the national full-fibre distribution?
CARDIFF SOUTH AND PENARTH has 84.1% full-fibre coverage, 3.1pp above the 81% UK average (rank #294 of 650), higher than 354 of 650 UK constituencies. Gigabit-capable coverage is 88.8%.
What share of CARDIFF SOUTH AND PENARTH premises still lack decent fixed/FWA broadband?
Ofcom's Spring 2026 measure shows all measured premises in CARDIFF SOUTH AND PENARTH can receive decent fixed or fixed-wireless broadband. Ultrafast (≥300 Mbit/s) coverage is 90.2%.
What 84.1% full-fibre means for CARDIFF SOUTH AND PENARTH
CARDIFF SOUTH AND PENARTH is 3.1pp ahead of the 81% UK average, but coverage still varies street by street.
- Check your own address, a constituency average can hide big street-by-street differences in coverage. Check your postcode
- See how CARDIFF SOUTH AND PENARTH ranks against every other UK constituency, not just the national average. Full UK rankings
- Understand what full-fibre actually gets you before switching. How Ofcom Connected Nations works
Coverage figures are Ofcom Connected Nations availability data, not a guarantee of service at any single address; always check before switching.
Source: Ofcom Connected Nations Spring 2026, January 2026 release (r1). Published under the Open Government Licence v3.0. Figures represent premises-level coverage availability, not actual subscriptions or speeds experienced.
This constituency's figures are computed directly from Ofcom Connected Nations data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.