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 CM11. 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
CM11 1AA Basildon Strong broadband coverage
Gigabit availability is 95.5%, with 95.5% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AB Basildon Strong broadband coverage
Gigabit availability is 76.9%, with 76.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AE Basildon Strong broadband coverage
Gigabit availability is 76.2%, with 76.2% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AF Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AG Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AH Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AJ Basildon 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 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AL Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AN Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AP Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AQ Basildon Strong broadband coverage
Gigabit availability is 96.2%, with 96.2% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AS Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AT Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1AU Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BA Basildon Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Mobile year 2025
CM11 1BB Basildon Strong broadband coverage
Gigabit availability is 93.3%, with 93.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BG Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BH Basildon Strong broadband coverage
Gigabit availability is 96.6%, with 96.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BJ Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BL Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BN Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BP Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BS Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BT Basildon Strong broadband coverage
Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
CM11 1BU Basildon Broadband coverage is mixed
Gigabit availability is 53.8%, with 53.8% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 56.2%
4G strong-coverage share is 100%, with 5G at 56.2% 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.