Ofcom data · 379 postcodes

CB3 broadband coverage — Cambridge

Full-fibre, gigabit and superfast broadband availability across the CB3 postcode district, plus business broadband and leased-line options for Cambridge.

Excellent coverage

Superfast (30Mb+)

97.2%

Ultrafast (300Mb+)

86.7%

Gigabit-capable

86.1%

Below USO (10Mb)

Check broadband at your exact CB3 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 CB3

Broadband availability in the CB3 postcode district (Cambridge) is Excellent — gigabit-capable full fibre is widely available. Across the 379 postcodes Ofcom measures in CB3, superfast broadband (30 Mbit/s or faster) reaches 97.2% of premises and gigabit-capable lines are available to 86.1%.

Around 0% of premises in CB3 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 CB3

Postcode	Superfast	Gigabit
CB3 0AA	100%	100%
CB3 0AD	100%	89.7%
CB3 0AE	100%	92.9%
CB3 0AF	100%	42.1%
CB3 0AG	100%	100%
CB3 0AH	94.6%	94.6%
CB3 0AJ	100%	100%
CB3 0AL	100%	100%
CB3 0AN	100%	100%
CB3 0AP	100%	100%

Business broadband & leased lines in Cambridge

Whether the CB3 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 CB3

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 CB4 — 93% 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

See all Cambridge (CB) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the CB3 area (Cambridge)?

In the CB3 area (Cambridge), superfast broadband (30 Mbit/s+) is available to approximately 97.2% of premises and gigabit-capable broadband to around 86.1%, 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 CB3 area (Cambridge)?

Gigabit-capable coverage in the CB3 area (Cambridge) stands at about 86.1% 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 CB3 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 CB3 area (Cambridge)?

Most UK providers serve the CB3 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.