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 BT21. 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
BT21 0AA	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 93.8%, with 93.8% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AB	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AD	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AE	ARDS AND NORTH DOWN	Broadband coverage is mixed Gigabit availability is 73.9%, with 73.9% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AF	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AG	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AH	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 94.7%, with 94.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AJ	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 91.7%, with 91.7% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AL	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AN	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AP	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 92.3%, with 92.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AQ	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 93.3%, with 93.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AR	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AS	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AT	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AU	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AW	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AX	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AY	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0AZ	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0BA	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0BB	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0BD	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0BE	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 98.3%, with 98.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
BT21 0BF	ARDS AND NORTH DOWN	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.7% · 5G 9.9% 4G strong-coverage share is 99.7%, with 5G at 9.9% 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.