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 CM98. Broadband is postcode level and mobile coverage remains area-level only in the current public seam.. Freshness: Mobile year 2025. Matches: 19.
Postcode Area Broadband Mobile Freshness
CM98 1AA Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AB Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AD Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AE Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AF Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AH Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AJ Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AL Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AN Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AP Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AQ Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AR Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AT Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AU Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AW Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AX Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AY Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1AZ Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 Mobile year 2025
CM98 1BA Chelmsford Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 100% · 5G 51.1%
4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.
 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.