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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 CF81. 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
CF81 8AA	Caerphilly	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8AB	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JA	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JB	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JD	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JE	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JF	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JG	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JH	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JJ	Caerphilly	Broadband coverage is mixed Gigabit availability is 7.7%, with 7.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JL	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JN	Caerphilly	Broadband coverage is mixed Gigabit availability is 55.6%, with 55.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JP	Caerphilly	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JQ	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JR	Caerphilly	Broadband coverage is mixed Gigabit availability is 14.3%, with 14.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JS	Caerphilly	Strong broadband coverage Gigabit availability is 92.9%, with 92.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JT	Caerphilly	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JU	Caerphilly	Broadband coverage is mixed Gigabit availability is 57.7%, with 57.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JW	Caerphilly	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JX	Caerphilly	Broadband coverage is mixed Gigabit availability is 60%, with 60% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JY	Caerphilly	Broadband coverage is mixed Gigabit availability is 46.2%, with 46.2% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8JZ	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8LA	Caerphilly	Strong broadband coverage Gigabit availability is 88%, with 88% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8LB	Caerphilly	Broadband coverage is mixed Gigabit availability is 6.5%, with 6.5% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CF81 8LD	Caerphilly	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 99.9% · 5G 8.6% 4G strong-coverage share is 99.9%, with 5G at 8.6% 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.

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