SA31 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 552 postcodes across 3 sectors in Carmarthenshire.
Gigabit
81%
Superfast
98%
Postcodes
552
SA31 in Carmarthenshire is a bright spot: 552 postcodes with excellent 81.4% gigabit reach and near-universal superfast coverage.
Broadband speeds in SA31
Share of SA31 premises by the fastest download speed available, averaged across all 552 postcodes in the district.
Superfast reaches 98.1% of postcodes, nearly universal. Gigabit capacity is strong at 81.4%, with no full-fibre data recorded, suggesting cable and mixed infrastructure dominate. Real-world performance is excellent: 81.4% of postcodes hit 300 Mbps or faster, 16.7% sit between 30 and 300 Mbps, and just 0.3% fall below the universal service obligation. Wireless backup is absent at 0%, indicating fibre and cable are the sole infrastructure routes. SA31 is the standout in Carmarthenshire, suggesting targeted investment in a town centre or densely settled area.
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
SA31 splits into 3 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 |
|---|---|---|---|---|
| SA31 1 | 205 | 99% | TBC | 90% |
| SA31 2 | 147 | 98% | TBC | 64% |
| SA31 3 | 200 | 98% | TBC | 85% |
All SA31 1 postcodes (205)
All SA31 2 postcodes (147)
All SA31 3 postcodes (200)
Best deals
Compare broadband deals in SA31
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Living in Carmarthenshire
SA31 shows what mature Carmarthenshire infrastructure looks like. Nearly all premises have practical gigabit access, and the below-USO tail is negligible. This postcode likely includes Carmarthen town centre or a well-connected settlement.
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
SA31 broadband FAQs
Why is SA31 so much better connected than other Carmarthenshire postcodes?
SA31 likely contains Carmarthen town centre or another major settlement. Urban density attracts provider investment; rural postcodes nearby lag significantly.
Is gigabit realistic for most SA31 postcodes?
Yes. 81.4% already access it. The remaining 18.6% sit on slower cable or partial fibre but will likely upgrade within 1 to 2 years.
Are there any connectivity gaps in SA31?
Only 1.9% sit below 30 Mbps superfast, and just 0.3% fall below 10 Mbps. Virtually no broadband poverty here.
Is there wireless fallback in SA31?
No 0% wireless backup coverage. Your connectivity depends entirely on fixed-line infrastructure (fibre or cable), but urban density means competition and provider choice are good.
Neighbouring districts
Check your exact postcode
Every postcode in SA31 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