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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 CO1. 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
CO1 1AA	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AG	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AH	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AJ	Colchester	Broadband coverage is mixed Gigabit availability is 63.2%, with 63.2% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AN	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AP	Colchester	Broadband coverage is mixed Gigabit availability is 56.3%, with 56.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AQ	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AT	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AU	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AW	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1AZ	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1BE	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1BG	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1BQ	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1BT	Colchester	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Mobile year 2025
CO1 1BX	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1BY	Colchester	Partial connectivity coverage No current broadband summary row matched this postcode.	4G 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Mobile year 2025
CO1 1BZ	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DA	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DB	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DF	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DG	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DH	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DJ	Colchester	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 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
CO1 1DL	Colchester	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 100% · 5G 25.3% 4G strong-coverage share is 100%, with 5G at 25.3% 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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