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 S21. 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
S21 1AA	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AB	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AD	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AE	North East Derbyshire	Strong broadband coverage Gigabit availability is 97.8%, with 97.8% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AF	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AG	North East Derbyshire	Broadband coverage is mixed Gigabit availability is 57.1%, with 57.1% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AH	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AL	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AN	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AP	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AQ	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AR	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AS	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AT	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AU	North East Derbyshire	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 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AW	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AX	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AY	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1AZ	North East Derbyshire	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 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1BA	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1BB	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1BD	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1BE	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1BF	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
S21 1BG	North East Derbyshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.5% · 5G 20.1% 4G strong-coverage share is 99.5%, with 5G at 20.1% 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.