Southampton broadband coverage (SO)
Full-fibre, gigabit and superfast availability across every SO postcode district in South East England — plus business broadband and leased lines.
Strong coverage
Superfast (30Mb+)
92.1%
Ultrafast (300Mb+)
70%
Gigabit-capable
69.2%
Below USO (10Mb)
—
Check your exact SO postcode
Area figures average a whole postcode region — get the precise availability, full-fibre status and mobile signal for your address.
Broadband across the SO area
The SO postcode area covers Southampton and the surrounding South East England region, spanning 23 outward-code districts. Overall fixed-broadband provision across SO is strong: superfast reaches about 92.1% of premises and gigabit-capable connectivity is available to roughly 69.2%.
Availability is never uniform across a whole postcode area — city-centre SO districts are typically further ahead on full fibre than outlying towns and rural fringes. Use the district breakdown below to see how each SO outcode compares, then check an exact postcode for the definitive answer.
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SO districts compared
Each SO outward code ranked by size. Click a district for its full breakdown and a postcode-level check.
| District | Area | Superfast | Gigabit |
|---|---|---|---|
| SO16 | Southampton | 97.6% | 86.6% |
| SO50 | Eastleigh | 96.7% | 80.2% |
| SO19 | Eastleigh | 99.6% | 97.2% |
| SO31 | Eastleigh | 97.3% | 75.5% |
| SO15 | Southampton | 95.2% | 92% |
| SO41 | New Forest | 94.9% | 38% |
| SO40 | New Forest | 94.4% | 76.3% |
| SO45 | New Forest | 97.3% | 78.4% |
| SO18 | Eastleigh | 99.3% | 94.4% |
| SO53 | Eastleigh | 99% | 72.9% |
| SO51 | New Forest | 88.6% | 55.9% |
| SO14 | Southampton | 88.5% | 80.1% |
| SO30 | Eastleigh | 97% | 74.5% |
| SO21 | Basingstoke and Deane | 77.9% | 25.7% |
| SO22 | Winchester | 98.6% | 81.5% |
| SO23 | Winchester | 95.9% | 58.1% |
| SO32 | Eastleigh | 86.8% | 44.9% |
| SO24 | Basingstoke and Deane | 63.4% | 35.3% |
| SO17 | Southampton | 99.5% | 95.3% |
| SO20 | Test Valley | 83.6% | 53.1% |
| SO52 | Test Valley | 97.5% | 83.7% |
| SO42 | New Forest | 83.5% | 65.4% |
| SO43 | New Forest | 87.2% | 46% |
Business broadband & leased lines in Southampton
Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines right across the SO area. Where gigabit full fibre is live we quote ultrafast symmetric connections; everywhere else a leased line still guarantees the speed and SLA your business needs.
Get a business broadband quote in Southampton
Free and no obligation — matched to what's actually available at your postcode.
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Frequently asked questions
What broadband speeds are available in the SO postcode area (Southampton)?
Can I get full-fibre or gigabit broadband in the SO postcode area (Southampton)?
How do I check broadband at my exact address in the SO postcode area (Southampton)?
Who provides business broadband in the SO postcode area (Southampton)?
Broadband availability data © 2026 Ofcom (Connected Nations), licensed under the Open Government Licence v3.0. Figures are area averages and predictions; availability at an individual address may differ — always confirm with a postcode-level check.