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 CO4. 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
CO4 0AA	Colchester	Strong broadband coverage Gigabit availability is 88.9%, with 88.9% 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
CO4 0AD	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
CO4 0AE	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
CO4 0AF	Colchester	Strong broadband coverage Gigabit availability is 93.5%, with 93.5% 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
CO4 0AG	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
CO4 0AH	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
CO4 0AJ	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
CO4 0AL	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
CO4 0AN	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
CO4 0AP	Colchester	Strong broadband coverage Gigabit availability is 95.7%, with 95.7% 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
CO4 0AQ	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
CO4 0AR	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
CO4 0AS	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
CO4 0AT	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
CO4 0AU	Colchester	Strong broadband coverage Gigabit availability is 95.7%, with 95.7% 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
CO4 0AW	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
CO4 0AX	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
CO4 0AY	Colchester	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 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
CO4 0AZ	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
CO4 0BA	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
CO4 0BB	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
CO4 0BG	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
CO4 0BH	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
CO4 0BJ	Colchester	Strong broadband coverage Gigabit availability is 95.8%, with 95.8% 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
CO4 0BL	Colchester	Strong broadband coverage Gigabit availability is 84.2%, with 84.2% 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

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.