Ofcom data · 777 postcodes

AL4 broadband coverage — Hertsmere

Full-fibre, gigabit and superfast broadband availability across the AL4 postcode district, plus business broadband and leased-line options for Hertsmere.

Excellent coverage

Superfast (30Mb+)

94.5%

Ultrafast (300Mb+)

86.2%

Gigabit-capable

85.5%

Below USO (10Mb)

0.3%

Check broadband at your exact AL4 postcode

District figures are an average — get the precise availability, full-fibre status and mobile signal for your address.

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Broadband in AL4

Broadband availability in the AL4 postcode district (Hertsmere) is Excellent — gigabit-capable full fibre is widely available. Across the 777 postcodes Ofcom measures in AL4, superfast broadband (30 Mbit/s or faster) reaches 94.5% of premises and gigabit-capable lines are available to 85.5%.

Around 0.3% of premises in AL4 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.

Sample postcodes in AL4

Postcode	Superfast	Gigabit
AL4 0AA	100%	100%
AL4 0AB	100%	100%
AL4 0AD	100%	100%
AL4 0AE	100%	100%
AL4 0AG	100%	100%
AL4 0AH	100%	100%
AL4 0AJ	100%	100%
AL4 0AN	100%	100%
AL4 0AQ	100%	100%
AL4 0AS	100%	0%

Business broadband & leased lines in Hertsmere

Whether the AL4 district has full fibre yet or not, we can connect your business. Where FTTP and gigabit are live we quote ultrafast full-fibre; where they aren't, a leased line still delivers guaranteed, symmetric speeds with an SLA. We also handle mobile coverage and VoIP for the same site.

Get a business broadband quote for AL4

Free, no obligation — full fibre, leased line or FTTC, matched to what's actually available at your postcode.

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Nearby AL districts

AL1 — 88.5% gigabit AL5 — 86.1% gigabit AL3 — 70.9% gigabit AL7 — 90% gigabit AL10 — 82.9% gigabit AL2 — 88.1% gigabit AL6 — 19.5% gigabit AL9 — 59.6% gigabit AL8 — 90.8% gigabit

See all St Albans (AL) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the AL4 area (Hertsmere)?

In the AL4 area (Hertsmere), superfast broadband (30 Mbit/s+) is available to approximately 94.5% of premises and gigabit-capable broadband to around 85.5%, based on Ofcom Connected Nations data. Exact availability varies by postcode — enter your full postcode in our checker for a precise result.

Can I get full-fibre or gigabit broadband in the AL4 area (Hertsmere)?

Gigabit-capable coverage in the AL4 area (Hertsmere) stands at about 85.5% of premises. Where gigabit and full-fibre (FTTP) are live, businesses can order symmetric, low-latency connections — ideal for cloud, VoIP and multi-site working. If full fibre hasn't reached your premises yet, a leased line can still deliver guaranteed gigabit speeds.

How do I check broadband at my exact address in the AL4 area (Hertsmere)?

Use the free broadband postcode checker on this page: enter your postcode to see fixed-broadband availability, gigabit/full-fibre coverage and mobile signal for all four networks at that location, sourced from official Ofcom data.

Who provides business broadband in the AL4 area (Hertsmere)?

Most UK providers serve the AL4 area (Hertsmere) over the Openreach and (where present) CityFibre or Virgin Media networks. Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines across the area — request a quote to compare options for your postcode.

Broadband availability data © 2026 Ofcom (Connected Nations), licensed under the Open Government Licence v3.0. Figures are area averages and predictions; availability at an individual address may differ — always confirm with a postcode-level check.