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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 CM15. 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
CM15 0AA	Brentwood	Broadband coverage is mixed Gigabit availability is 40%, with 40% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AD	Brentwood	Strong broadband coverage Gigabit availability is 75%, with 75% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AE	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AG	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AH	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AL	Brentwood	Broadband coverage is mixed Gigabit availability is 62.5%, with 62.5% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AN	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AP	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AR	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AT	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AU	Brentwood	Strong broadband coverage Gigabit availability is 94.1%, with 94.1% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AW	Brentwood	Broadband coverage is mixed Gigabit availability is 58.3%, with 58.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AX	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0AZ	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BA	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BB	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BD	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BE	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BG	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BH	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BJ	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BL	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BN	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BP	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CM15 0BQ	Brentwood	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 39% 4G strong-coverage share is 100%, with 5G at 39% 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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