Broadband in Cardiff

Scale usually drags averages down. Cardiff's do not sag much. Superfast coverage of 97.3% sits right on the national norm of roughly 97 per cent, maintained across a base of 7,302 postcodes rather than a compact district where uniformity comes cheap. Gigabit-capable availability reaches 89%, so nearly nine in ten postcodes can order services built for 1,000 Mbps. The slow tail is thin for an area this size. Just 1% of postcodes fall below 10 Mbps, which still translates to a real number of addresses across 11 outward codes, but as a share it is well contained. Put together, the figures describe a city where the default expectation at any given address is a fast connection, the top tier is available to most, and genuinely poor lines are the exception you check for rather than the risk you plan around.

The 89% gigabit figure frames the choice for Cardiff households. Most can pick from the full range of packages, including the fastest tiers, and should decide on price and usage rather than availability. The 11% outside gigabit coverage and the 1% below 10 Mbps are the two groups for whom an address-level check genuinely changes the answer.