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 S40. 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
S40 1AA Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AD Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AG Chesterfield 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 100% · 5G 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AH Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AP Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AQ Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AR Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AX Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AY Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1AZ Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BA Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BB Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BH Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BJ Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BL Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BN Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BP Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BQ Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1BW Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1DA Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1DB Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1DD Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1DE Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1DF Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% in the current area-level summary.
 Broadband year 2024 · Mobile year 2025
S40 1DG Chesterfield 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 54%
4G strong-coverage share is 100%, with 5G at 54% 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.