CF11 postcode area guide — Cardiff

Where is CF11?

Broadband & internet speeds in CF11

Excellent coverage

Broadband availability in the CF11 postcode district (Cardiff) is Excellent — gigabit-capable full fibre is widely available. Across the 787 postcodes Ofcom measures in CF11, superfast broadband (30 Mbit/s or faster) reaches 98.3% of premises and gigabit-capable lines are available to 89.6%.

Around 0.1% of premises in CF11 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.

Sample postcodes in CF11

Run a speed test to see what you're actually getting, or check your exact postcode.

Mobile signal around Cardiff

Ofcom's coverage model for the wider Cardiff district (173,267 premises):

Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.

Crime in CF11

Police recorded 915 incidents within about a mile of the centre of CF11 in May 2026 (latest published street-level data). The breakdown:

Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).

House prices in CF11

Based on 478 sales registered with HM Land Registry in the last 12 months, the median sold price in CF11 is £230,000, down 2.1% on the previous year (£235,000).

Latest recorded sales in CF11

Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.

Who lives here? Cardiff demographics

Census 2021 figures for the wider Cardiff district (362,308 residents, 147,333 households):

Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.

Schools in and around CF11

Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.

Food hygiene ratings in CF11

424 rated food businesses operate in CF11. 257 hold the top rating of 5, 76 are rated 4, and 13 are rated 2 or below.

Among the 5-rated: 8 Till Late, Admiral, Aldi Stores Ltd, Allied Pharmacy Canton, Arif Halal Food Store.

Source: Food Standards Agency, food hygiene ratings (FHRS) open data.

Energy performance (EPC) in CF11

From a sample of 313 Energy Performance Certificates across 10 CF11 postcodes, the most common rating is band D (average band C). 51% of sampled homes are rated C or better.

Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.

Phone area codes for Cardiff

Landlines around CF11 typically use:

Had a call from an unknown number? Use our free UK phone number checker to see who called.

What's it like living in CF11?

Postcodes in CF11

Neighbouring districts

All Cardiff (CF) postcode districts ›

Frequently asked questions

Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.