SP4 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 1,082 postcodes across 5 sectors in Wiltshire.
Full fibre
0%
Gigabit
71%
Superfast
94%
Postcodes
1,082
SP4 encompasses 1,082 Test Valley postcodes where infrastructure is competent but not premium. Gigabit reaches 71%.
Broadband speeds in SP4
Share of SP4 premises by the fastest download speed available, averaged across all 1,082 postcodes in the district.
Test Valley's largest code here, SP4 spans 1,082 postcodes with solid but unexceptional coverage across its footprint. Gigabit sits at 71%. Superfast is 94.1%. The speed distribution shows concentration. 71% hit 300+ Mbps. 23% occupy 30 to 300 Mbps. 1.9% fall below 10 Mbps. Below-USO postcodes are 0.3%, negligible. SP4 is uniformly served across its scale, though gigabit is conditional rather than assumed. The 23% middling tier is notably present. Infrastructure varies moderately across this footprint. Speed tiers reflect typical urban and semi-rural mix.
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
0%
Premises that can use a fixed wireless access service
Broadband by sector
SP4 splits into 5 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 |
|---|---|---|---|---|
| SP4 0 | 134 | 80% | 0% | 23% |
| SP4 6 | 236 | 96% | 0% | 83% |
| SP4 7 | 335 | 97% | 0% | 83% |
| SP4 8 | 209 | 96% | 0% | 81% |
| SP4 9 | 168 | 96% | 0% | 56% |
All SP4 0 postcodes (134)
All SP4 6 postcodes (236)
All SP4 7 postcodes (335)
All SP4 8 postcodes (209)
All SP4 9 postcodes (168)
Best deals
Compare broadband deals in SP4
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Living in Wiltshire
SP4 demonstrates how scale affects average performance among Test Valley codes. At 1,082 postcodes, it shows heterogeneous settlement patterns and mixed infrastructure.
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
SP4 broadband FAQs
How does SP4's gigabit rate vary?
SP4 at 71% shows that gigabit varies across Test Valley. Settlement density differences and infrastructure patterns influence coverage significantly.
What if I'm in the 1.9% below-10 Mbps bracket?
It's rare. Request a coverage check to understand eligibility for intervention schemes.
Should I assume superfast is guaranteed?
Superfast reaches 94.1%, so highly probable. The remaining 5.9% are either ultrafast or slower, so verify your postcode.
What's the most common non-gigabit tier?
30 to 300 Mbps at 23%, so roughly one in four postcodes. Gigabit is possible but not the default.
Neighbouring districts
Check your exact postcode
Every postcode in SP4 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