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 LL57. 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
LL57 1AB	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AD	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AG	Gwynedd	Broadband coverage is mixed Gigabit availability is 0%, with 75% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AH	Gwynedd	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AJ	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AL	Gwynedd	Strong broadband coverage Gigabit availability is 88.9%, with 88.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AN	Gwynedd	Broadband coverage is mixed Gigabit availability is 7.1%, with 7.1% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AP	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AQ	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AR	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AS	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AT	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AU	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AW	Gwynedd	Broadband coverage is mixed Gigabit availability is 42.9%, with 42.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AX	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AY	Gwynedd	Broadband coverage is mixed Gigabit availability is 4.3%, with 4.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1AZ	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BA	Gwynedd	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BB	Gwynedd	Broadband coverage is mixed Gigabit availability is 31.8%, with 31.8% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BD	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BE	Gwynedd	Broadband coverage is mixed Gigabit availability is 53.6%, with 53.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BF	Gwynedd	Broadband coverage is mixed Gigabit availability is 0%, with 6.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BG	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BH	Gwynedd	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 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable in the current area-level summary.	Broadband year 2024 · Mobile year 2025
LL57 1BJ	Gwynedd	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 93.8% 4G strong-coverage share is 93.8%, with 5G at Unavailable 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.