CB4 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 890 postcodes across 4 sectors in Cambridge.
Full fibre
0%
Gigabit
94%
Superfast
99%
Postcodes
890
CB4 is Cambridge's apex connector: 94.3% gigabit, 99.1% superfast, and just 0.4% below 10 Mbps across 890 postcodes. This is exceptionally strong even for the city.
Broadband speeds in CB4
Share of CB4 premises by the fastest download speed available, averaged across all 890 postcodes in the district.
Gigabit covers 94.3% of the 890 postcodes in CB4, representing one of the highest rates across the Cambridge region. Cable and fibre networks have achieved near-complete saturation here. Only 0.4% of postcodes fall below 10 Mbps, a negligible shortfall for an urban area. No addresses lack Universal Service Obligation coverage, ensuring every postcode has at least basic broadband access. The 3.9% occupying the 30 to 300 Mbps band are exceptions to the gigabit dominance, with the vast majority achieving speeds above 300 Mbps. Superfast penetration reaches 99.1%, indicating reliable baseline speeds everywhere. This extreme concentration reflects mature infrastructure and high density fibre deployment across Cambridge's suburban periphery.
Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.
Connectivity in detail
Below 10 Mbps USO
0%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
0%
Premises that can use a fixed wireless access service
Broadband by sector
CB4 splits into 4 postcode sectors. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.
| Sector | Postcodes | Superfast | Full fibre | Gigabit |
|---|---|---|---|---|
| CB4 0 | 47 | 89% | 0% | 83% |
| CB4 1 | 326 | 100% | 0% | 92% |
| CB4 2 | 294 | 100% | 0% | 97% |
| CB4 3 | 223 | 100% | 0% | 97% |
All CB4 0 postcodes (47)
All CB4 1 postcodes (326)
All CB4 2 postcodes (294)
All CB4 3 postcodes (223)
Best deals
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Living in Cambridge
CB4 dominates Cambridge's outer periphery with dominant cable and fibre networks. Price data for this sector is not available, but connectivity warrants top-tier consideration.
Remote worker score
55/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
CB4 broadband FAQs
Is CB4 the best-connected Cambridge postcode?
By gigabit standards, yes. 94.3% is among the highest in the entire Cambridge area.
Will I definitely get gigabit in CB4?
94% of postcodes support gigabit. The remaining 6% reach superfast speeds, so high-speed connectivity is nearly assured.
Are there any slow postcodes here?
0.4% fall below 10 Mbps. This is effectively negligible across the entire district.
What if my address is in the non-gigabit minority?
Nearly all alternatives exceed 30 Mbps. Below-10Mbps premises are rare enough to warrant checking your specific postcode.
Neighbouring districts
Check your exact postcode
Every postcode in CB4 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.
Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources