Ofcom data · 906 postcodes

CB4 broadband coverage — Cambridge

Full-fibre, gigabit and superfast broadband availability across the CB4 postcode district, plus business broadband and leased-line options for Cambridge.

Excellent coverage

Superfast (30Mb+)

98.2%

Ultrafast (300Mb+)

94.1%

Gigabit-capable

93%

Below USO (10Mb)

Check broadband at your exact CB4 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 CB4

Broadband availability in the CB4 postcode district (Cambridge) is Excellent — gigabit-capable full fibre is widely available. Across the 906 postcodes Ofcom measures in CB4, superfast broadband (30 Mbit/s or faster) reaches 98.2% of premises and gigabit-capable lines are available to 93%.

Around 0% of premises in CB4 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 CB4

Postcode	Superfast	Gigabit
CB4 0AB	40%	40%
CB4 0AE	40%	20%
CB4 0AP	100%	0%
CB4 0BZ	100%	100%
CB4 0DL	96%	28%
CB4 0DN	27.3%	27.3%
CB4 0DP	0%	0%
CB4 0DS	70.4%	37%
CB4 0DT	100%	0%
CB4 0DW	100%	100%

Business broadband & leased lines in Cambridge

Whether the CB4 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 CB4

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

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Nearby CB districts

CB8 — 65.7% gigabit CB1 — 92.9% gigabit CB6 — 83.9% gigabit CB23 — 79.2% gigabit CB9 — 70.4% gigabit CB24 — 70.9% gigabit CB7 — 76.3% gigabit CB22 — 73.7% gigabit CB2 — 80.5% gigabit CB11 — 67.3% gigabit

See all Cambridge (CB) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the CB4 area (Cambridge)?

In the CB4 area (Cambridge), superfast broadband (30 Mbit/s+) is available to approximately 98.2% of premises and gigabit-capable broadband to around 93%, 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 CB4 area (Cambridge)?

Gigabit-capable coverage in the CB4 area (Cambridge) stands at about 93% 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 CB4 area (Cambridge)?

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 CB4 area (Cambridge)?

Most UK providers serve the CB4 area (Cambridge) 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.