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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 CB11. 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
CB11 3AA	Uttlesford	Broadband coverage is mixed Gigabit availability is 70%, with 70% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AB	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AD	Uttlesford	Strong broadband coverage Gigabit availability is 97%, with 97% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AE	Uttlesford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AF	Uttlesford	Broadband coverage is mixed Gigabit availability is 10%, with 10% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AG	Uttlesford	Strong broadband coverage Gigabit availability is 95.1%, with 95.1% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AH	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AJ	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AN	Uttlesford	Broadband coverage is mixed Gigabit availability is 16.7%, with 16.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AP	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AQ	Uttlesford	Broadband coverage is mixed Gigabit availability is 71.4%, with 71.4% of premises at at least 300 Mbps and 0.6% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AR	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AS	Uttlesford	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Mobile year 2025
CB11 3AT	Uttlesford	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Mobile year 2025
CB11 3AU	Uttlesford	Broadband coverage is mixed Gigabit availability is 6.7%, with 6.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AW	Uttlesford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AY	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3AZ	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3BA	Uttlesford	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Mobile year 2025
CB11 3BH	Uttlesford	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 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3BJ	Uttlesford	Strong broadband coverage Gigabit availability is 91.9%, with 91.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3BL	Uttlesford	Strong broadband coverage Gigabit availability is 94.6%, with 94.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3BN	Uttlesford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3BP	Uttlesford	Strong broadband coverage Gigabit availability is 95.5%, with 95.5% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CB11 3BQ	Uttlesford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 97% · 5G 0.5% 4G strong-coverage share is 97%, with 5G at 0.5% 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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