Broadband and mobile checker

Search a postcode or postcode area against the current live broadband and mobile coverage seams.

Source: Ofcom broadband and mobile coverage. Coverage: Live connectivity rows matched postcode area CF3. Broadband is postcode level and mobile coverage remains area-level only in the current public seam.. Freshness: Broadband year 2024 · Mobile year 2025. Matches: 25.

Postcode	Area	Broadband	Mobile	Freshness
CF3 0AA	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AB	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AD	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AE	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AF	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AG	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AH	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AJ	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AL	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AN	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AP	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AQ	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AR	Cardiff	Strong broadband coverage Gigabit availability is 94.9%, with 94.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AS	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AT	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AU	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AW	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AX	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AY	Cardiff	Broadband coverage is mixed Gigabit availability is 0%, with 0% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0AZ	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0BA	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0BB	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0BD	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0BE	Cardiff	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF3 0BF	Cardiff	Broadband coverage is mixed Gigabit availability is 0%, with 0% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.8% · 5G 95.9% 4G strong-coverage share is 99.8%, with 5G at 95.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025

Known caveats

Mobile coverage is still served at area level in the public seam, so treat it as a shortlist signal rather than a street-level verdict.
Connectivity rows do not replace a final provider and address-level availability check before you commit to a property.
If you search a postcode area, neighbouring postcode rows can differ enough that the exact postcode follow-up still matters.