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 SM4. 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
SM4 4AB Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AD Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AE Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AG Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AH Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AJ Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AN Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AP Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AR Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AS Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AT Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AU Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AW Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AX Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AY Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4AZ Merton Strong broadband coverage
Gigabit availability is 97.4%, with 97.4% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BA Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BB Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BE Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BH Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BN Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BP Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BQ Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BS Merton Strong broadband coverage
Gigabit availability is 95%, with 95% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SM4 4BU Merton 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 96.9%
4G strong-coverage share is 100%, with 5G at 96.9% 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.