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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 SG4. 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
SG4 0AA	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AB	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AE	North Hertfordshire	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 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AF	North Hertfordshire	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 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AG	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AH	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AJ	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AL	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AN	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AP	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AQ	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AS	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AT	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AU	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AW	North Hertfordshire	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 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AX	North Hertfordshire	Strong broadband coverage Gigabit availability is 97.1%, with 97.1% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0AZ	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BA	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BD	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BE	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BF	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BG	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BH	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BJ	North Hertfordshire	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 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
SG4 0BL	North Hertfordshire	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.6% · 5G 17.7% 4G strong-coverage share is 99.6%, with 5G at 17.7% 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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