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 SA3. 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
SA3 1AA	Swansea	Broadband coverage is mixed Gigabit availability is 8.6%, with 8.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AB	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AD	Swansea	Broadband coverage is mixed Gigabit availability is 2.9%, with 2.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AE	Swansea	Broadband coverage is mixed Gigabit availability is 25.7%, with 25.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AF	Swansea	Broadband coverage is mixed Gigabit availability is 12.5%, with 12.5% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AG	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AH	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AJ	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AL	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AN	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AQ	Swansea	Broadband coverage is mixed Gigabit availability is 15%, with 15% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AR	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AS	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AU	Swansea	Below-USO risk present Gigabit availability is 0%, with 0% of premises at at least 300 Mbps and 12.5% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AW	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AX	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AY	Swansea	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 6.1% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1AZ	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BA	Swansea	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 5% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BB	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BD	Swansea	Below-USO risk present Gigabit availability is 0%, with 0% of premises at at least 300 Mbps and 100% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BE	Swansea	Below-USO risk present Gigabit availability is 0%, with 0% of premises at at least 300 Mbps and 100% below the Universal Service Obligation.	4G 99% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BG	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BH	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SA3 1BJ	Swansea	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% · 5G 19.1% 4G strong-coverage share is 99%, with 5G at 19.1% 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.