CB23 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 861 postcodes across 8 sectors in South Cambridgeshire.
Full fibre
0%
Gigabit
84%
Superfast
94%
Postcodes
861
Cambridge's CB23 sector leads with gigabit penetration at 83.6% and almost zero broadband exclusion. This is one of the area's strongest corridors for speed.
Broadband speeds in CB23
Share of CB23 premises by the fastest download speed available, averaged across all 861 postcodes in the district.
Ultrafast gigabit coverage spans 84% of the 861 postcodes, making this one of Cambridge's premium connectivity zones. Cable and fibre networks deliver these speeds to the vast majority of addresses. Below-10Mbps premises are rare, affecting 2.9% only, a small but noticeable tail for a suburban area. No postcodes fall below Universal Service Obligation, indicating extensive network reach across all postcodes. The speed distribution is heavily skewed towards gigabit: 84% of postcodes exceed 300 Mbps, with only 10% in the 30 to 300 Mbps band. This profile suggests mature infrastructure investment across CB23, typical of well-serviced Cambridge suburbs.
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
CB23 splits into 8 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 |
|---|---|---|---|---|
| CB23 1 | 74 | 94% | 0% | 84% |
| CB23 2 | 70 | 95% | 0% | 92% |
| CB23 3 | 110 | 98% | 0% | 87% |
| CB23 4 | 58 | 86% | 0% | 62% |
| CB23 5 | 65 | 100% | 0% | 100% |
| CB23 6 | 182 | 94% | 0% | 87% |
| CB23 7 | 196 | 95% | 0% | 90% |
| CB23 8 | 106 | 88% | 0% | 60% |
All CB23 1 postcodes (74)
All CB23 2 postcodes (70)
All CB23 3 postcodes (110)
All CB23 4 postcodes (58)
All CB23 5 postcodes (65)
All CB23 6 postcodes (182)
All CB23 7 postcodes (196)
All CB23 8 postcodes (106)
Best deals
Compare broadband deals in CB23
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Living in South Cambridgeshire
A particularly well-connected district, CB23 offers limited excuse for slow broadband. House prices and demographics data for this postcode is not available, but connectivity is the standout.
Remote worker score
54/100
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
CB23 broadband FAQs
Is every postcode in CB23 covered by gigabit?
83.6% are. The remaining 16% of postcodes fall short of gigabit, though most still reach superfast speeds.
Are there any slow spots in this district?
2.9% of postcodes remain below 10 Mbps. It's a small minority but worth checking before committing to a move.
What's the typical speed here?
Most households can access gigabit. 84% of postcodes support 300+ Mbps downloads, well above typical expectations.
Do I need to worry about broadband outages?
Universal Service Obligation ensures every postcode qualifies for at least basic coverage, with no exceptions in CB23.
Neighbouring districts
Check your exact postcode
Every postcode in CB23 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