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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 CB21. 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
CB21 4AA	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AB	South Cambridgeshire	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 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AD	South Cambridgeshire	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 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AE	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AF	South Cambridgeshire	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 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AG	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AH	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AL	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AN	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AP	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AQ	South Cambridgeshire	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Mobile year 2025
CB21 4AR	South Cambridgeshire	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 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AS	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AT	South Cambridgeshire	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Mobile year 2025
CB21 4AU	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AW	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AX	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AY	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4AZ	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4BA	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4BB	South Cambridgeshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB21 4BE	South Cambridgeshire	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Mobile year 2025
CB21 4BF	South Cambridgeshire	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Mobile year 2025
CB21 4BG	South Cambridgeshire	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% in the current area-level summary.	Mobile year 2025
CB21 4DG	South Cambridgeshire	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 99.3% · 5G 11.1% 4G strong-coverage share is 99.3%, with 5G at 11.1% 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.

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