CO4 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 1,174 postcodes across 6 sectors in Colchester.
Full fibre
0%
Gigabit
88%
Superfast
96%
Postcodes
1,174
CO4 is Colchester's largest postcode district with 1,174 entries. Gigabit touches 87.8%, making it marginally the best-served in the town. Wireless peaks at 18.8%.
Broadband speeds in CO4
Share of CO4 premises by the fastest download speed available, averaged across all 1,174 postcodes in the district.
Gigabit coverage reaches 87.8% across the 1,174 postcodes, nearly matching CO2 and CO3. However, wireless rises sharply to 18.8%, the highest proportion across Colchester, suggesting significant wireless reliance in suburban or rural pockets. Only 8.7% of postcodes sit in the 30-300 Mbps bracket, and 1.2% fall below 10 Mbps. Nearly 0.4% miss uso thresholds. The prevalence of wireless signals the transition from dense town to sprawling suburbs, where network operators favour wireless backhaul for cost-efficiency. Wired gigabit and wireless solutions coexist here, each serving different geographic needs. CO4 is fundamentally well-connected, but more diverse in its infrastructure than central Colchester. The wireless presence reflects geography, not poor service; it indicates suburban growth beyond the core's cable reach.
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
<1%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
19%
Premises that can use a fixed wireless access service
Broadband by sector
CO4 splits into 6 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 |
|---|---|---|---|---|
| CO4 0 | 167 | 99% | 0% | 96% |
| CO4 3 | 339 | 96% | 0% | 85% |
| CO4 5 | 390 | 94% | 0% | 82% |
| CO4 6 | 86 | 98% | 0% | 95% |
| CO4 7 | 4 | 100% | 0% | 100% |
| CO4 9 | 188 | 98% | 0% | 94% |
All CO4 0 postcodes (167)
All CO4 3 postcodes (339)
All CO4 5 postcodes (390)
All CO4 6 postcodes (86)
All CO4 9 postcodes (188)
Best deals
Compare broadband deals in CO4
Deals are priced per address. Enter your full postcode to see every package available where you live.
Free comparison. Opens our deals partner in a new tab.
Living in Colchester
CO4 offers strong gigabit odds but a higher wireless dependency than central Colchester. This reflects the transition from dense town to sprawling suburbs, where wireless fills infrastructure gaps.
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
CO4 broadband FAQs
Why is wireless so high in CO4 compared to CO2?
CO4 extends further into suburban areas where wireless links are more cost-effective than cable to isolated postcodes.
What percentage have gigabit in CO4?
87.8%, matching central Colchester, but 18.8% rely on wireless instead of cable.
Is gigabit via wireless as reliable as cable?
Professional wireless installations are stable, though latency may be marginally higher than cable in some settings.
Are there many postcodes without adequate connectivity?
Only 1.2% fall below 10 Mbps. The overwhelming majority can work or stream without issue.
Neighbouring districts
Check your exact postcode
Every postcode in CO4 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