4 towns · Updated October, 2026
Broadband Deals in Carmarthenshire
01Live comparison
Best Broadband Offers in Carmarthenshire October, 2026
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Carmarthenshire is a principal area of Wales. It has 6,566 live residential postcodes, and 14 postcode districts lie mainly within it (ONS Postcode Directory, May 2025). Four of its towns have their own broadband page: Ammanford, Burry Port, Caerfyrddin and Llanelli.
Enter your postcode in the comparison above to see the broadband deals available at your address.
Broadband deals by town in Carmarthenshire
Each town page has the live comparison and lists the postcodes it covers.
-
Ammanford
- Postcode districts
- SA14 (part), SA18 (part), SA19 (part), SA32 (part)
- Live residential postcodes
- 1,257
- Gigabit-capable
- 76.9% of premises
-
Burry Port
- Postcode districts
- SA15 (part), SA16, SA17 (part)
- Live residential postcodes
- 661
- Gigabit-capable
- 72% of premises
-
Caerfyrddin
- Postcode districts
- SA17 (part), SA31, SA32 (part), SA33 (part)
- Live residential postcodes
- 1,218
- Gigabit-capable
- 69.1% of premises
-
Llanelli
- Postcode districts
- SA14 (part), SA15 (part)
- Live residential postcodes
- 1,404
- Gigabit-capable
- 89.9% of premises
Postcode districts in Carmarthenshire
These 14 postcode districts have at least half of their live residential postcodes in Carmarthenshire. Enter your full postcode in the comparison to see the deals for your address.
- SA14
- SA15
- SA16
- SA17
- SA18
- SA19
- SA20
- SA31
- SA32
- SA33
- SA34
- SA38
- SA39
- SA40
Sources: ONS Postcode Directory, May 2025 (postcode districts, postcodes and councils); Ofcom Connected Nations, January 2026 (gigabit-capable broadband).
Carmarthenshire broadband FAQs
Still unsure? Call us on 01483 355354 or send us a message.
Which towns in Carmarthenshire have their own broadband page?
Four towns in Carmarthenshire have their own broadband page on Switch My Broadband: Ammanford, Burry Port, Caerfyrddin and Llanelli. Enter your postcode in the comparison on this page to see the deals available at your address.
Which postcode districts are in Carmarthenshire?
14 postcode districts have at least half of their live residential postcodes in Carmarthenshire: SA14, SA15, SA16, SA17, SA18, SA19, SA20, SA31, SA32, SA33, SA34, SA38, SA39 and SA40. Source: ONS Postcode Directory, May 2025.
Which council covers Carmarthenshire?
All 6,566 live residential postcodes in Carmarthenshire are in the Carmarthenshire council area. Source: ONS Postcode Directory, May 2025.
Can I get full fibre in Carmarthenshire?
73% of premises in Carmarthenshire (69,415 of 95,119) could get full fibre, compared with 81% across the UK. Whether your home can get it depends on your address: enter your postcode in the comparison on this page to see the deals available there. Source: Ofcom Connected Nations, January 2026.
How many homes and businesses in Carmarthenshire can get gigabit broadband?
69,415 premises in Carmarthenshire (73% of 95,119) could get gigabit-capable broadband, with download speeds of 1 Gbit/s or more; across the UK the figure is 87.8%. Source: Ofcom Connected Nations, January 2026.
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