Ofcom data · 1,125 postcodes

HA4 broadband coverage — Harrow

Full-fibre, gigabit and superfast broadband availability across the HA4 postcode district, plus business broadband and leased-line options for Harrow.

Excellent coverage

Superfast (30Mb+)

98.8%

Ultrafast (300Mb+)

92.1%

Gigabit-capable

90.4%

Below USO (10Mb)

0.1%

Check broadband at your exact HA4 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 HA4

Broadband availability in the HA4 postcode district (Harrow) is Excellent — gigabit-capable full fibre is widely available. Across the 1,125 postcodes Ofcom measures in HA4, superfast broadband (30 Mbit/s or faster) reaches 98.8% of premises and gigabit-capable lines are available to 90.4%.

Around 0.1% of premises in HA4 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 HA4

Postcode	Superfast	Gigabit
HA4 0AA	100%	90.9%
HA4 0AB	100%	100%
HA4 0AG	100%	65.2%
HA4 0AH	100%	89.3%
HA4 0AJ	83.3%	83.3%
HA4 0AL	100%	97.8%
HA4 0AN	100%	100%
HA4 0AP	100%	100%
HA4 0AR	100%	100%
HA4 0AS	100%	97.8%

Business broadband & leased lines in Harrow

Whether the HA4 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 HA4

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

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Nearby HA districts

HA8 — 84.9% gigabit HA3 — 89.9% gigabit HA5 — 81% gigabit HA9 — 79.1% gigabit HA2 — 85.8% gigabit HA1 — 76.4% gigabit HA0 — 85.2% gigabit HA7 — 74.1% gigabit HA6 — 70.4% gigabit

See all Harrow (HA) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the HA4 area (Harrow)?

In the HA4 area (Harrow), superfast broadband (30 Mbit/s+) is available to approximately 98.8% of premises and gigabit-capable broadband to around 90.4%, 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 HA4 area (Harrow)?

Gigabit-capable coverage in the HA4 area (Harrow) stands at about 90.4% 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 HA4 area (Harrow)?

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 HA4 area (Harrow)?

Most UK providers serve the HA4 area (Harrow) 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.