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CB23 postcode

Broadband in CB23 7ZL

Caldecote, South Cambridgeshire

Gigabit broadband is available at this postcode.

Best speedGigabit (1Gbps+)
StandardSuperfastGigabit
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Free, independent comparison · Ofcom verified data · Updated 1 March 2026

Flood Risk

Medium

Fibre (FTTP)

No

Best speed

Gigabit (1Gbps+)

Reviewed by Sage MitchellData last verified: 1 March 2026

Speed Calculator

Adjust the options below to see how much broadband speed your household needs.

2
18

HD uses ~5 Mbps per person. 4K uses ~25 Mbps.

Each person on calls needs around 10 Mbps.

Competitive gaming needs low latency as much as raw speed.

Cameras, thermostats, speakers and similar devices each use a few Mbps.

Estimated speed needed14 Mbps

Gigabit broadband (Gigabit (1Gbps+)) is available at CB23 7ZL. That covers your 14 Mbps needs with room to spare.

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Speed Test

Check your current download speed and see how it compares to what is available at CB23 7ZL.

The test downloads a 2 MB file from our server and measures how long it takes.

This test measures download speed only. Results vary depending on network conditions.

Broadband availability

Source: Ofcom Connected Nations 2025 (Jul 2025)

TechnologyAvailableCoverageTypical Speed
Standard (ADSL)100%
100%
10-20 Mbps
Superfast (30+ Mbps)100%
100%
30-80 Mbps
Ultrafast (100+ Mbps)100%
100%
100-300 Mbps
Full Fibre (FTTP)N/A
N/A
300-900 Mbps
Gigabit100%
100%
900-1,000 Mbps

Speed Distribution at CB23 7ZL

100%
300+ Mbps (100%)

Source: Ofcom Connected Nations 2025

Mobile coverage

4G & 5G coverage · Ofcom Connected Nations 2025

4G Outdoor

95%

4G Indoor

85%

5G Outdoor

%

Networks with 4G

EEO2ThreeVodafone
Ofcom Connected Nations 2025

Schools nearby

Nearest schools within 5 miles · Ofsted ratings as at Jan 2026

Schools data is currently unavailable.

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Flood risk

🟠

Flood risk: Medium

This postcode is in undefined — medium risk of flooding from rivers and sea.

Flood Zone

Risk Level

Medium

Environment Agency

Air quality

Particulate matter & nitrogen dioxide levels

air quality

Air quality data not available.

PM2.5 (fine particles) μg/m³

WHO guideline: 15 μg/m³

PM10 (coarse particles) μg/m³

WHO guideline: 45 μg/m³

NO₂ (nitrogen dioxide) μg/m³

WHO guideline: 25 μg/m³

DEFRA UK-AIR · Guidelines: WHO 2021

Transport links

Nearest train stations and towns

Nearest train stations

No train stations found within 15 miles

Network Rail / National Rail · Straight-line distances

Council tax bands

Band distribution for South Cambridgeshire

Most common: Band

A
5%£1,381
B
10%£1,611
C
20%£1,841
D
25%£2,071
E
20%£2,531
F
10%£2,991
G
8%£3,452
H
2%£4,142

Annual council tax estimates for , 2024/25

VOA (Valuation Office Agency)

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Living near CB23 7ZL

Looking at CB23 7ZL in Caldecote? Here is what the data says. From broadband coverage to crime rates, this is the full picture. All numbers are from official sources. The guide is updated as new data becomes available.

100% of premises at CB23 7ZL can access superfast broadband. The UK average is 93%. This postcode meets or exceeds that benchmark. Ultrafast broadband (100 Mbps+) reaches 100% of properties. That is solid coverage for bandwidth-heavy households. Gigabit-capable connections cover 100% of premises. Most homes can access gigabit speeds if they choose to.

Looking at the full speed profile for CB23 7ZL gives a better picture of what to expect. 100% of connections fall in the 300 Mbps or faster range. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls. Over half of connections exceed 300 Mbps. That supports multiple 4K streams, large file transfers, and cloud gaming without issue.

Translating the numbers at CB23 7ZL into daily use gives a clearer picture. Most premises have superfast speeds. Remote working with video calls and cloud tools should be manageable for most households.

Fixed Wireless Access is not currently available at CB23 7ZL. For properties without fibre, 4G or 5G home broadband from Three, EE, or Vodafone may be an alternative.

The USO guarantees every UK home at least 10 Mbps. At CB23 7ZL, 0% of properties do not meet this threshold. Every property here meets the minimum standard. That is not the case everywhere. Next-generation access (NGA) reaches 100% of the area. NGA typically means speeds of 24 Mbps or above.

Flood risk at CB23 7ZL is rated Medium. Check Environment Agency flood maps for detailed information. Specialist flood insurance may be needed.

The three most common bands are D (25%), C (20%), E (20%). Band D corresponds to 1991 property values of £68,001 to £88,000. Current values are typically much higher. The spread across mid-range bands suggests a varied housing stock.

4G outdoor coverage at CB23 7ZL reaches 95%. Indoor 4G drops to 85%. Some signal loss indoors is normal. Most calls and data should still work inside. Coverage data covers EE, O2, Three, Vodafone. Check each operator individually, as coverage varies by network.

Suitability scores for CB23 7ZL: remote working 55/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.

CB23 7ZL falls within the South Cambridgeshire local authority area. The immediate area is Caldecote, a distinct community within the wider district. The CB23 postcode area contains 861 postcodes on this site. Superfast broadband across CB23 ranges from 0% to 100%. CB23 7ZL is above the area average of 94%.

How does CB23 7ZL compare to its neighbours? CB23 7ZN (0.03 miles, caldecote) has 100% superfast coverage and 100% gigabit. CB23 7ZF (0.04 miles, caldecote) has 100% superfast coverage and 100% gigabit. CB23 7ZU (0.06 miles, caldecote) has 100% superfast coverage and 100% gigabit. Coverage is broadly similar across these neighbouring postcodes.

Not every property at CB23 7ZL gets the same speeds. Run a postcode check with each provider before signing up. Headline speeds are not guarantees. If fibre is unavailable, consider 4G home broadband or satellite as alternatives. Speeds may still be adequate for most uses. Compare contract lengths, total costs over the term, and exit fees. The cheapest monthly rate is not always the best deal.

Every part of Caldecote has its own feel. This data gives you the factual starting point. A visit fills in the rest.

What does all of this mean for someone considering CB23 7ZL? Connectivity at CB23 7ZL is a strength. Strong broadband coverage gives flexibility for both working and leisure. The area scores well on that front. South Cambridgeshire as a local authority area has its own planning priorities, council services, and infrastructure investment plans. Check the council website for the latest. The data covers what can be measured. Caldecote has its own character that numbers alone cannot capture. Use these figures as a filter, then visit to get the full picture.

Data sources include Ofcom (broadband and mobile), Land Registry (house prices), Police.uk (crime), Ofsted (schools), Environment Agency (flood risk), and Open-Meteo (air quality). Council tax data comes from the Valuation Office Agency. EPC data is from DLUHC. Transport data uses NaPTAN. Speed distribution figures are from Ofcom Connected Nations. All figures are the latest available at the time of writing.

Data is a starting point for Caldecote. Walk the streets at different times. Test your mobile signal. Check parking, noise levels, and the feel of the neighbourhood. Run a speed test on the actual connection. Some things only a visit can reveal.

That is the full data picture for CB23 7ZL in Caldecote. Use it alongside your own research. For the most current broadband speeds, run a live speed test from this page. Check back periodically as data is refreshed with new releases.

More local data is being added for this postcode

This page already has postcode-specific content, and more data-backed sections will appear as the remaining local datasets finish processing.

Frequently asked questions about CB23 7ZL

What are the broadband speeds available at CB23 7ZL?

Superfast broadband (30 Mbps+) is available to 100% of premises at CB23 7ZL. Ultrafast coverage is at 100%.

What is the average house price near CB23 7ZL?

No recent house price data is available for CB23 7ZL.

What is the flood risk for properties at CB23 7ZL?

CB23 7ZL has a Medium flood risk rating. Check Environment Agency maps for detail.

What schools are nearby in the CB23 7ZL area?

School data for CB23 7ZL is being updated. Check the Get Information About Schools service for the latest.

How does crime rate in CB23 7ZL compare to other areas?

Crime data for this area is being updated.

How suitable is CB23 7ZL for remote working?

CB23 7ZL scores 55/100 for remote working suitability. Speeds may limit video-heavy workflows.

What is the mobile signal like at CB23 7ZL?

4G outdoor coverage at CB23 7ZL is 95%. Indoor coverage may be lower.

What is the most common energy efficiency rating near CB23 7ZL?

EPC data for CB23 7ZL is being updated. Check the EPC register for individual property ratings.

What is the council tax band distribution at CB23 7ZL?

Council tax band information for CB23 7ZL is being updated.

How accessible are GP surgeries near CB23 7ZL?

GP surgery data for CB23 7ZL is being updated. Check NHS.uk for the latest.

What transport links are available near CB23 7ZL?

Transport data for CB23 7ZL is being updated.

Is CB23 7ZL a suitable area for families?

CB23 7ZL scores 50/100 for family suitability. Check school and crime sections above for detail.

What is the air quality like at CB23 7ZL?

Air quality data for CB23 7ZL is being updated.

How far is the nearest EV charging point from CB23 7ZL?

EV charging data for CB23 7ZL is being updated. Check Zap-Map for the latest.

Can I get full fibre broadband at CB23 7ZL?

Ultrafast broadband (100 Mbps+) reaches 100% of premises. Check Openreach and local operators for FTTP availability.

Area suitability scores

CB23 7ZL

Remote Worker

55

Based on superfast broadband coverage, FTTP %, and 4G mobile outdoor coverage.

Family

50

Based on Ofsted school ratings, crime rate, flood risk, and GP surgery proximity.

Value for Money

50

Based on broadband quality relative to average house price in the area.

Map

Area info

Parish

Caldecote

District

South Cambridgeshire

Region

Constituency

LSOA

E01018231

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