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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 CM2. 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
CM2 0AA	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AE	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AG	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AH	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AJ	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AL	Chelmsford	Broadband coverage is mixed Gigabit availability is 33.3%, with 33.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AP	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AQ	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AR	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AS	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AT	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AU	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AW	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AY	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0AZ	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BA	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BB	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BD	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BG	Chelmsford	Strong broadband coverage Gigabit availability is 97.7%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BH	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BJ	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BL	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BN	Chelmsford	Broadband coverage is mixed Gigabit availability is 0%, with 1.6% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BQ	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM2 0BS	Chelmsford	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 51.1% 4G strong-coverage share is 100%, with 5G at 51.1% 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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