PO3 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 429 postcodes across 2 sectors in Portsmouth.
Full fibre
0%
Gigabit
98%
Superfast
98%
Postcodes
429
Portsmouth's PO3 is the city's densest connectivity pocket: 97.8% of 429 postcodes reach gigabit, with 99.9% achieving superfast. Urban density defines this area.
Broadband speeds in PO3
Share of PO3 premises by the fastest download speed available, averaged across all 429 postcodes in the district.
Virtually every postcode in PO3 meets superfast standards (99.9%). Gigabit reaches 97.5%, the highest concentration in Portsmouth's core. Cable networks cluster densely, creating redundant competitive markets at the gigabit tier. The 97.8% reaching 300 Mbps-plus speed reflects cable's near-omnipresence. Only 0.4% sit in the 30-300 Mbps band, and just 1.2% fall below 10 Mbps (an oddity in an otherwise ultra-connected code, possibly isolated premises or data noise). Residents here face choice abundance rather than constraint: multiple gigabit providers, strong price competition, switching largely driven by service quality rather than availability. This is cable at peak urban density.
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
0%
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
PO3 splits into 2 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 |
|---|---|---|---|---|
| PO3 5 | 244 | 97% | 0% | 97% |
| PO3 6 | 185 | 99% | 0% | 98% |
All PO3 5 postcodes (244)
All PO3 6 postcodes (185)
Best deals
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Living in Portsmouth
PO3 shows peak urban cable deployment. No switching constraints exist on broadband grounds.
Remote worker score
55/100
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
PO3 broadband FAQs
Is gigabit the standard in PO3?
Essentially yes. 97.5% of postcodes are gigabit-passed, making it the default rather than premium.
What about postcodes outside the gigabit footprint?
About 11 postcodes (2.5%) are not gigabit-passed, but nearly all sit in the 30-300 Mbps tier.
Should broadband availability influence a property decision here?
No. It is not a practical constraint. Focus on provider choice, pricing, or service quality instead.
Why is there a tiny 1.2% below 10 Mbps?
Likely a small cluster of isolated premises or legacy copper links in an otherwise fibre-dense zone.
Neighbouring districts
Check your exact postcode
Every postcode in PO3 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