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 SW3. 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
SW3 1AB Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AD Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AE Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AF Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AJ Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AN Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AP Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AR Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AS Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AT Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AU Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AW Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1AX Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1BA Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1BB Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1BW Westminster 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 100%
4G strong-coverage share is 100%, with 5G at 100% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1DB Kensington and Chelsea Broadband coverage is mixed
Gigabit availability is 46.7%, with 46.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1DE Kensington and Chelsea Broadband coverage is mixed
Gigabit availability is 28.6%, with 28.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1DP Kensington and Chelsea Broadband coverage is mixed
Gigabit availability is 57.1%, with 57.1% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1ED Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1ER Westminster 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 100%
4G strong-coverage share is 100%, with 5G at 100% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1ES Westminster 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 100%
4G strong-coverage share is 100%, with 5G at 100% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1ET Westminster 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 100%
4G strong-coverage share is 100%, with 5G at 100% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1HP Kensington and Chelsea 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 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
SW3 1HQ Kensington and Chelsea Broadband coverage is mixed
Gigabit availability is 21.7%, with 21.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.
 4G 100% · 5G 98.7%
4G strong-coverage share is 100%, with 5G at 98.7% 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.