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 LL51. 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
LL51 9AB 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
LL51 9AJ Gwynedd Broadband coverage is mixed
Gigabit availability is 71.4%, with 71.4% 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
LL51 9AL 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
LL51 9AQ Gwynedd Below-USO risk present
Gigabit availability is 71.4%, with 71.4% of premises at at least 300 Mbps and 30% 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
LL51 9AX Gwynedd Below-USO risk present
Gigabit availability is 72.4%, with 72.4% of premises at at least 300 Mbps and 25% 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
LL51 9AZ Gwynedd Strong broadband coverage
Gigabit availability is 93.8%, with 93.8% of premises at at least 300 Mbps and 7.7% 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
LL51 9BQ Gwynedd Below-USO risk present
Gigabit availability is 40%, with 40% of premises at at least 300 Mbps and 16.7% 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
LL51 9DJ Gwynedd Broadband coverage is mixed
Gigabit availability is 11.8%, with 11.8% 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
LL51 9DQ Gwynedd Below-USO risk present
Gigabit availability is 72.7%, with 72.7% of premises at at least 300 Mbps and 10% 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
LL51 9DX 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
LL51 9DZ 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
LL51 9EJ Gwynedd Strong broadband coverage
Gigabit availability is 75%, 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
LL51 9EQ 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
LL51 9EX Gwynedd Broadband coverage is mixed
Gigabit availability is 33.3%, with 33.3% 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
LL51 9EZ Gwynedd Below-USO risk present
Gigabit availability is 0%, with 0% of premises at at least 300 Mbps and 33.3% 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
LL51 9HX 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
LL51 9HZ Gwynedd Broadband coverage is mixed
Gigabit availability is 50%, with 50% 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
LL51 9LJ 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
LL51 9LQ Gwynedd Broadband coverage is mixed
Gigabit availability is 66.7%, with 66.7% 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
LL51 9LX 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
LL51 9LZ 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
LL51 9NJ 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
LL51 9NQ 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
LL51 9NX 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
LL51 9NZ 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

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.