CO3 postcode
Broadband in CO3 4AG
Colchester, Colchester
Standard broadband is the main option at this postcode.
Compare Broadband Deals →Free, independent comparison · Ofcom verified data · Updated 12 March 2026
Flood Risk
Medium
Fibre (FTTP)
No
Best speed
Data pending
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.
Your household needs approximately 14 Mbps. We don't have speed data for CO3 4AG yet.
Speed Test
Check your current download speed and see how it compares to what is available at CO3 4AG.
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) | 0% | 0% | 10-20 Mbps |
| Superfast (30+ Mbps) | 0% | 0% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 0% | 0% | 100-300 Mbps |
| Full Fibre (FTTP) | N/A | N/A | 300-900 Mbps |
| Gigabit | 0% | 0% | 900-1,000 Mbps |
Speed Distribution at CO3 4AG
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 Colchester
Most common: Band
Annual council tax estimates for , 2024/25
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CO3 4AG sits in Colchester. This guide covers broadband speeds, house prices, schools, and more. Every figure comes from verified public data sources. Use it alongside your own research when comparing areas.
Superfast coverage here stands at 0%. Nationally, 93% of UK premises have access. Some properties may struggle with speed.
Looking at the full speed profile for CO3 4AG gives a better picture of what to expect. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls.
Translating the numbers at CO3 4AG into daily use gives a clearer picture. With no superfast coverage, streaming is limited. Standard definition video may work, but HD and 4K are unlikely to run smoothly. Downloading large files will take significantly longer than average. 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 CO3 4AG yet. Satellite services like Starlink or 4G home broadband routers can fill the gap where fixed-line options are limited.
0% of premises at CO3 4AG 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 0% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at CO3 4AG 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 CO3 4AG 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 CO3 4AG: remote working 50/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for CO3 4AG is Colchester. The CO3 postcode area contains 856 postcodes on this site. Superfast broadband across CO3 ranges from 0% to 100%.
How does CO3 4AG compare to its neighbours? CO3 4AS (0.03 miles, colchester-unparished-area) has 100% superfast coverage and 0% gigabit.
When choosing a broadband provider at CO3 4AG, 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.
Colchester offers a mix of residential properties and local amenities. The character of any area is best judged in person.
Looking at the overall picture for CO3 4AG, a few things are worth highlighting. Broadband is the main concern at CO3 4AG. With no superfast coverage, check what alternatives exist before committing. 4G home broadband, satellite, or community fibre schemes may fill the gap. Colchester 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. Colchester 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 Colchester. 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.
CO3 4AG in Colchester: broadband, house prices, crime, schools, and more. All from verified sources. Run a speed test above for a live reading. Compare with nearby postcodes to see how this area stacks up against its neighbours.
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 CO3 4AG
What are the broadband speeds available at CO3 4AG?
Broadband is available at CO3 4AG. Contact local providers for specific speed information.
What is the average house price near CO3 4AG?
No recent house price data is available for CO3 4AG.
What is the flood risk for properties at CO3 4AG?
CO3 4AG has a Medium flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CO3 4AG area?
School data for CO3 4AG is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CO3 4AG compare to other areas?
Crime data for this area is being updated.
How suitable is CO3 4AG for remote working?
CO3 4AG scores 50/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CO3 4AG?
4G outdoor coverage at CO3 4AG is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CO3 4AG?
EPC data for CO3 4AG is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CO3 4AG?
Council tax band information for CO3 4AG is being updated.
How accessible are GP surgeries near CO3 4AG?
GP surgery data for CO3 4AG is being updated. Check NHS.uk for the latest.
What transport links are available near CO3 4AG?
Transport data for CO3 4AG is being updated.
Is CO3 4AG a suitable area for families?
CO3 4AG scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CO3 4AG?
Air quality data for CO3 4AG is being updated.
How far is the nearest EV charging point from CO3 4AG?
EV charging data for CO3 4AG is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CO3 4AG?
Full fibre availability at CO3 4AG is being updated. Check Openreach for the latest rollout status.
Area suitability scores
CO3 4AGRemote Worker
50Based 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
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Area info
Parish
Colchester
District
Colchester
Region
Constituency
LSOA
E01021676
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