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 BT27. 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
BT27 4AA	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AB	LISBURN AND CASTLEREAGH	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 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AD	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AE	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AG	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AJ	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AL	LISBURN AND CASTLEREAGH	Broadband coverage is mixed Gigabit availability is 43.5%, with 43.5% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AN	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AQ	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AR	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AS	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AT	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AW	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4AX	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BA	LISBURN AND CASTLEREAGH	Broadband coverage is mixed Gigabit availability is 4%, with 4% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BB	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BE	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BG	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BH	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BJ	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BL	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BN	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BP	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BQ	LISBURN AND CASTLEREAGH	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 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT27 4BS	LISBURN AND CASTLEREAGH	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.4% · 5G 42.4% 4G strong-coverage share is 99.4%, with 5G at 42.4% 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.