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 AL9. 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
AL9 5AB	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AD	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AE	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 33.3%, with 33.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AF	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AH	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AJ	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AL	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AN	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 0%, with 81.8% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AP	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AR	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 50%, with 50% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AS	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 0%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AT	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AW	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 0%, with 80% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AX	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AY	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 97.3%, with 97.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5AZ	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 80%, with 80% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BA	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BB	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BD	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 33.3%, with 33.3% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BE	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BG	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 83.3%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BL	Welwyn Hatfield	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 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BT	Welwyn Hatfield	Broadband coverage is mixed Gigabit availability is 0%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BW	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% in the current area-level summary.	Broadband year 2024 · Mobile year 2025
AL9 5BX	Welwyn Hatfield	Strong broadband coverage Gigabit availability is 100%, with 100% of premises at at least 300 Mbps and 0% below the Universal Service Obligation.	4G 99.9% · 5G 36.2% 4G strong-coverage share is 99.9%, with 5G at 36.2% 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.