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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 CM99. Broadband is postcode level and mobile coverage remains area-level only in the current public seam.. Freshness: Mobile year 2025. Matches: 25.
Postcode Area Broadband Mobile Freshness
CM99 2AB 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
CM99 2AP 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
CM99 2AQ 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
CM99 2AR 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
CM99 2AS 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
CM99 2AT 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
CM99 2AW 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
CM99 2AY 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
CM99 2BA 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
CM99 2BG 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
CM99 2BN 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
CM99 2BU 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
CM99 2BW 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
CM99 2DE 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
CM99 2DG 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
CM99 2DH 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
CM99 2DS 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
CM99 2DX 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
CM99 2DZ 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
CM99 2ED 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
CM99 2EE 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
CM99 2EG 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
CM99 2EH 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
CM99 2EL 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
CM99 2EP 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.

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