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 CM23 3ZH. Broadband is postcode level and mobile coverage remains area-level only in the current public seam.. Freshness: Mobile year 2025. Matches: 1.
Postcode Area Broadband Mobile Freshness
CM23 3ZH East Hertfordshire Partial connectivity coverage
No current broadband summary row matched this postcode.
 4G 98.5% · 5G 15.8%
4G strong-coverage share is 98.5%, with 5G at 15.8% 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.