CM23 postcode
Broadband in CM23 5FR
Bishop's Stortford, East Hertfordshire
Superfast broadband covers 16.7% of premises here.
Free, independent comparison · Ofcom verified data · Updated 26 March 2026
Flood Risk
Medium
Fibre (FTTP)
No
Best speed
~30 Mbps
Speed Calculator
Adjust the options below to see how much broadband speed your household needs.
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.
The best available speed at CM23 5FR is ~30 Mbps. That covers your 14 Mbps estimate.
Speed Test
Check your current download speed and see how it compares to what is available at CM23 5FR.
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)
| Technology | Available | Coverage | Typical Speed |
|---|---|---|---|
| Standard (ADSL) | 17% | 17% | 10-20 Mbps |
| Superfast (30+ Mbps) | 17% | 17% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 0% | 0% | 100-300 Mbps |
| Full Fibre (FTTP) | 0% | 0% | 300-900 Mbps |
| Gigabit | 0% | 0% | 900-1,000 Mbps |
Speed Distribution at CM23 5FR
Source: Ofcom Connected Nations 2025
Mobile coverage
4G & 5G coverage · Ofcom Connected Nations 2025
4G Outdoor
4G Indoor
5G Outdoor
Networks with 4G
Schools nearby
Nearest schools within 5 miles · Ofsted ratings as at Jan 2026
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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
Air quality
Particulate matter & nitrogen dioxide levels
air quality
Air quality data not available.
WHO guideline: 15 μg/m³
WHO guideline: 45 μg/m³
WHO guideline: 25 μg/m³
Transport links
Nearest train stations and towns
Nearest train stations
No train stations found within 15 miles
Council tax bands
Band distribution for East Hertfordshire
Most common: Band
Annual council tax estimates for , 2024/25
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Looking at CM23 5FR in Bishop's Stortford? 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.
Superfast broadband (30 Mbps+) coverage at CM23 5FR stands at 16.7%. That is below the UK average of 93%.
Looking at the full speed profile for CM23 5FR gives a better picture of what to expect. 83.3% of connections fall in the 10 to 30 Mbps range. 16.7% of connections fall in the 30 to 300 Mbps range. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls.
Here is how the broadband at CM23 5FR maps against common household needs. Superfast coverage is limited here. Streaming HD video should work on one device. Multiple simultaneous streams may struggle during peak hours. Limited superfast coverage means remote workers should test their connection carefully. Video calls may drop or pixelate. A mobile hotspot can serve as a backup.
FWA broadband has not reached CM23 5FR yet. Satellite services like Starlink or 4G home broadband routers can fill the gap where fixed-line options are limited.
0% of premises at CM23 5FR fall below the Universal Service Obligation of 10 Mbps. Every property here meets the minimum standard. That is not the case everywhere. Next-generation access (NGA) reaches 16.7% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at CM23 5FR 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.
Outdoor 4G mobile signal at CM23 5FR is available across 95% of the area. 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. Strong 4G coverage combined with limited fixed broadband means 4G home broadband could be a practical alternative here.
Suitability scores for CM23 5FR: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
CM23 5FR falls within the East Hertfordshire local authority area. The immediate area is Bishop's Stortford, a distinct community within the wider district. The CM23 postcode area contains 1097 postcodes on this site. Superfast broadband across CM23 ranges from 0% to 100%. CM23 5FR is below the area average of 97%.
How does CM23 5FR compare to its neighbours? CM23 5SJ (0.03 miles, bishop-s-stortford) has 100% superfast coverage and 100% gigabit. CM23 5SB (0.04 miles, bishop-s-stortford) has 100% superfast coverage and 100% gigabit. CM23 5HL (0.04 miles, bishop-s-stortford) has 64.5% superfast coverage and 54.8% gigabit. CM23 5GW (0.04 miles, bishop-s-stortford) has 0% superfast coverage and 0% gigabit. Neighbouring postcodes tend to have better superfast coverage.
When choosing a broadband provider at CM23 5FR, check what technology reaches your specific address. Availability varies by street and sometimes by building. 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.
Life in Bishop's Stortford depends on what matters to you. Broadband, transport, and local services vary by street.
Looking at the overall picture for CM23 5FR, a few things are worth highlighting. East Hertfordshire 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. Bishop's Stortford 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 Bishop's Stortford. 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 CM23 5FR in Bishop's Stortford. 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 CM23 5FR
What are the broadband speeds available at CM23 5FR?
Superfast broadband (30 Mbps+) is available to 16.7% of premises at CM23 5FR.
What is the average house price near CM23 5FR?
No recent house price data is available for CM23 5FR.
What is the flood risk for properties at CM23 5FR?
CM23 5FR has a Medium flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CM23 5FR area?
School data for CM23 5FR is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CM23 5FR compare to other areas?
Crime data for this area is being updated.
How suitable is CM23 5FR for remote working?
CM23 5FR scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CM23 5FR?
4G outdoor coverage at CM23 5FR is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CM23 5FR?
EPC data for CM23 5FR is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CM23 5FR?
Council tax band information for CM23 5FR is being updated.
How accessible are GP surgeries near CM23 5FR?
GP surgery data for CM23 5FR is being updated. Check NHS.uk for the latest.
What transport links are available near CM23 5FR?
Transport data for CM23 5FR is being updated.
Is CM23 5FR a suitable area for families?
CM23 5FR scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CM23 5FR?
Air quality data for CM23 5FR is being updated.
How far is the nearest EV charging point from CM23 5FR?
EV charging data for CM23 5FR is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CM23 5FR?
Full fibre availability at CM23 5FR is being updated. Check Openreach for the latest rollout status.
Area suitability scores
CM23 5FRRemote Worker
35Based on superfast broadband coverage, FTTP %, and 4G mobile outdoor coverage.
Family
50Based on Ofsted school ratings, crime rate, flood risk, and GP surgery proximity.
Value for Money
50Based on broadband quality relative to average house price in the area.
Map
Area info
Parish
Bishop's Stortford
District
East Hertfordshire
Region
Constituency
LSOA
E01023441
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