Ofcom data · 558 postcodes

SA31 broadband coverage — Carmarthenshire

Full-fibre, gigabit and superfast broadband availability across the SA31 postcode district, plus business broadband and leased-line options for Carmarthenshire.

Strong coverage

Superfast (30Mb+)

96.7%

Ultrafast (300Mb+)

73.3%

Gigabit-capable

73.3%

Below USO (10Mb)

0.2%

Check broadband at your exact SA31 postcode

District figures are an average — get the precise availability, full-fibre status and mobile signal for your address.

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Broadband in SA31

Broadband availability in the SA31 postcode district (Carmarthenshire) is Strong — superfast is near-universal and gigabit is rolling out. Across the 558 postcodes Ofcom measures in SA31, superfast broadband (30 Mbit/s or faster) reaches 96.7% of premises and gigabit-capable lines are available to 73.3%.

Around 0.2% of premises in SA31 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.

Sample postcodes in SA31

Postcode	Superfast	Gigabit
SA31 1AA	100%	0%
SA31 1AD	100%	0%
SA31 1AF	100%	0%
SA31 1AG	100%	0%
SA31 1AH	100%	100%
SA31 1AN	100%	0%
SA31 1AS	100%	100%
SA31 1AW	100%	100%
SA31 1BA	100%	0%
SA31 1BD	100%	12.5%

Business broadband & leased lines in Carmarthenshire

Whether the SA31 district has full fibre yet or not, we can connect your business. Where FTTP and gigabit are live we quote ultrafast full-fibre; where they aren't, a leased line still delivers guaranteed, symmetric speeds with an SLA. We also handle mobile coverage and VoIP for the same site.

Get a business broadband quote for SA31

Free, no obligation — full fibre, leased line or FTTC, matched to what's actually available at your postcode.

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Nearby SA districts

SA1 — 89.6% gigabit SA4 — 75.8% gigabit SA62 — 49.5% gigabit SA15 — 70.2% gigabit SA11 — 63.6% gigabit SA14 — 71.7% gigabit SA19 — 27.7% gigabit SA12 — 86.9% gigabit SA10 — 68.9% gigabit SA18 — 41.3% gigabit

See all Swansea (SA) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the SA31 area (Carmarthenshire)?

In the SA31 area (Carmarthenshire), superfast broadband (30 Mbit/s+) is available to approximately 96.7% of premises and gigabit-capable broadband to around 73.3%, based on Ofcom Connected Nations data. Exact availability varies by postcode — enter your full postcode in our checker for a precise result.

Can I get full-fibre or gigabit broadband in the SA31 area (Carmarthenshire)?

Gigabit-capable coverage in the SA31 area (Carmarthenshire) stands at about 73.3% of premises. Where gigabit and full-fibre (FTTP) are live, businesses can order symmetric, low-latency connections — ideal for cloud, VoIP and multi-site working. If full fibre hasn't reached your premises yet, a leased line can still deliver guaranteed gigabit speeds.

How do I check broadband at my exact address in the SA31 area (Carmarthenshire)?

Use the free broadband postcode checker on this page: enter your postcode to see fixed-broadband availability, gigabit/full-fibre coverage and mobile signal for all four networks at that location, sourced from official Ofcom data.

Who provides business broadband in the SA31 area (Carmarthenshire)?

Most UK providers serve the SA31 area (Carmarthenshire) over the Openreach and (where present) CityFibre or Virgin Media networks. Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines across the area — request a quote to compare options for your postcode.

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.