15 providers offer 180 broadband deals in Carmarthen Town North and, from £20.00 a month and up to 1,600 Mbps. Typical measured speed is 76 Mbps down and 23 Mbps up, 25% below the UK download average.
Best value broadband deal in Carmarthen Town North and, Carmarthenshire (SA31)
The best value in Carmarthen Town North and, Carmarthenshire (SA31) on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in Carmarthen Town North and, Carmarthenshire (SA31)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in Carmarthen Town North and, Carmarthenshire (SA31)
The fastest deal available in Carmarthen Town North and, Carmarthenshire (SA31) is Full Fibre 1.6GB Premium from EE at 1,600 Mbps.
Fastest in Carmarthen Town North and, Carmarthenshire (SA31)
Full Fibre 1.6GB Premium
115 Mbps upload · Full Fibre
Best for power users & big households
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Avg £37.32/mo over contract · £896 total over 24 months
Cheapest broadband deal in Carmarthen Town North and, Carmarthenshire (SA31)
The cheapest deal in Carmarthen Town North and, Carmarthenshire (SA31) is 300Mb Full Fibre (24 Months) from 4th Utility at £20.00 a month for 300 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £20.00 is an intro price that rises to £40.00 a month after the intro window, making the real first-year cost £240. Onestream is essentially level at £20.63 a month.
Cheapest in Carmarthen Town North and, Carmarthenshire (SA31)
300Mb Full Fibre (24 Months)
300 Mbps upload · Full Fibre
Best for 4–5 person households, heavy use
£20/mo
for 12 months, then £40/mo
Avg £30/mo over contract · £720 total over 24 months
Runner-up on price
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Compare broadband deals in Carmarthen Town North and, Carmarthenshire (SA31)
£21/mo
rises to £24 in April 2027 (+£3)
Avg £23.25/mo over contract · £558 total over 24 months
£30/mo
rises to £33.50 in April 2027 (+£3.50)
Avg £32.63/mo over contract · £783 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Broadband providers in Carmarthen Town North and, Carmarthenshire (SA31)
15 providers serve Carmarthen Town North and, Carmarthenshire (SA31), with EE the fastest at 1,600 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical Carmarthen Town North and, Carmarthenshire (SA31) download speed at 76 Mbps.
Upgrade nudge
Room to upgrade in Carmarthen Town North and, Carmarthenshire (SA31)
Only 9% of the 5,100 connections here are on 300Mbps or faster, even though 76% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical Carmarthen Town North and, Carmarthenshire (SA31) line runs 76 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 76% of Carmarthen Town North and, Carmarthenshire (SA31), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Carmarthen Town North and, Carmarthenshire (SA31)?
The wholesale networks carrying Carmarthen Town North and, Carmarthenshire (SA31) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Independently-built fibre networks in Carmarthen Town North and, Carmarthenshire (SA31), taken from the live deal mix. They don't cover every street, but on streets they reach, they typically beat the Openreach price.
- CityFibre: Sky, The One Broadband
- 4th Utility: 4th Utility, Rise Fibre
Plus Openreach (Openreach is laid to virtually every UK address).
Currently 15 providers have addressable deals in Carmarthen Town North and, Carmarthenshire (SA31).
What broadband coverage does Carmarthen Town North and, Carmarthenshire (SA31) have?
Superfast broadband reaches 97% of Carmarthen Town North and, Carmarthenshire (SA31) premises but gigabit only 76%, so around 21% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Carmarthen Town North and, Carmarthenshire (SA31)?
Outdoor 5G reaches 92% of Carmarthen Town North and, Carmarthenshire (SA31), but 2% of homes get no indoor 4G from any network, so a mobile backup here wants a window.
How Carmarthen Town North and, Carmarthenshire (SA31) compares within Carmarthenshire
Across 14 postcode districts in Carmarthenshire, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for Carmarthen Town North and, Carmarthenshire (SA31)come from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.