UK Area Code information for Llanelli

Llanelli Area Code Allocation

Ofcom has allocated the 01554 area code to service Llanelli and the surrounding area on at least 3 exchanges.

The Residential Area of Llanelli

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Llanelli comprises postcodes covering roughly 15,083km2 containing 908 commercial properties and 21,755 domestic properties.

Llanelli Exchange Information

Pontyates SWPYH

The Pontyates exchange has 102 commercial and 1,918 domestic properties.
Adsl Max
Fixed Rate
Fttc Range A (Clean)
Fttc Range B (Impacted)
Fttp On Demand
Some postcodes covered by this exange include;
SA15 5TR
SA15 5TT
SA15 5TS
SA15 5TX
SA15 5TU
SA15 5RS
SA15 5UA
SA15 5UU
SA15 4RQ
SA15 5RU
SA15 5UJ
SA15 5TY
SA15 5TD
SA15 5TB
SA15 5UE
SA15 5UF
SA15 5RT
SA15 5RY
SA15 5UD
SA15 5UB
SA15 5SA
SA15 5UG
SA15 5UT
SA15 5SD
SA15 5SB
SA15 5PG
SA15 5SJ
SA15 5SE
SA15 5SF
SA15 5SY
SA15 5ST
SA15 5UH
SA15 5RW
SA15 5TE
SA15 5SU
SA15 5SG
SA15 5RD
SA15 5UW
SA15 5PY
SA15 5NP
SA15 5SS
SA15 5UN
SA15 5SH
SA15 5NS
SA15 5NY
SA15 5PT
SA15 5TF
SA15 5RN
SA15 5PN
SA15 5NU

Llangennech SWLLG

The Llangennech exchange has 41 commercial and 2,170 domestic properties.
Adsl Max
Fixed Rate
Fttc Range A (Clean)
Fttc Range B (Impacted)
Fttp On Demand
Wbc Adsl 2+
Wbc Adsl 2+ Annex M
Some postcodes covered by this exange include;
SA14 8TE
SA14 8WB
SA14 9RF
SA14 8UQ
SA14 8TF
SA14 8QS
SA14 9RH
SA14 8GE
SA14 8GA
SA14 8TG
SA14 8GF
SA14 9UP
SA14 8GD
SA14 8WA
SA14 9RY
SA14 9RG
SA14 8UP
SA14 8WD
SA14 9UW
SA14 8SJ
SA14 8UR
SA14 8GB
SA14 8SZ
SA14 8TH
SA14 9RT
SA14 8TZ
SA14 8SX
SA14 8TJ
SA14 8TX
SA14 8RX
SA14 9UN
SA14 8TQ
SA14 9RS
SA14 8AH
SA14 8UJ
SA14 9UL
SA14 8UU
SA14 8TL
SA14 8YR
SA14 9RR
SA14 9UH
SA14 8TR
SA14 8UF
SA14 8TP
SA14 8DJ
SA14 9RU
SA14 9RQ
SA14 8TN
SA14 8TW
SA14 8EF

Llanelli SWLJ

The Llanelli exchange has 867 commercial and 19,585 domestic properties.
Adsl Max
Fixed Rate
Wbc Fixed Rate
Wbc Adsl 2+
Wbc Adsl 2+ Annex M
Some postcodes covered by this exange include;
SA15 2PU
SA15 2PT
SA15 2SL
SA15 2TN
SA15 2TL
SA15 1AH
SA15 2UH
SA15 1AD
SA15 1AZ
SA15 2TE
SA15 2SH
SA15 1AB
SA15 1UT
SA15 3AD
SA15 3AA
SA15 2TJ
SA15 2TP
SA15 3AP
SA15 2TW
SA15 3AG
SA15 2SR
SA15 2SG
SA15 1AF
SA15 1BJ
SA15 1AE
SA15 4YG
SA16 0WX
SA16 0WZ
SA16 0XW
SA16 0YX
SA16 0ZQ
SA16 0ZH
SA16 0XY
SA16 0YJ
SA16 0XA
SA16 0XG
SA15 4ZW
SA15 9BD
SA15 9BP
SA15 9BT
SA15 9BW
SA15 9BX
SA15 9BU
SA15 9BQ
SA15 9BR
SA15 9BS
SA15 9BE
SA15 9BJ
SA15 9BL
SA15 9BN

Broadband Connectivity Type Definitions

Different telephone exchanges have different broadband connectivity depending on their geographic location, the consumers they serve (demand and composition of those consumers) and the competative landscape in that locale. As a result there is a mix of services and related performance which BT classify as follows;

Fixed Rate

There for three fixed rate lines; 512Kbps, 1Mbps and 2Mbps. As with IPStream 500, 1000 and 2000, these have an upstream capped at 288Kbps. Note that all of the other WBC products apart from these are strictly rate adaptive (like ADSL Max).

WBC Fixed Rate

Wholesale Broadband Connect (WBC) offers high-speed, high-performance broadband services.


BT's original ADSL2+ wholesale product with an option of an upstream cap at 448Kbps or no cap at all. ADSL2+ can achieve up to 1Mbps upstream.


ADSL2+ (also known as 21CN (21st Century Network) and WBC (Wholesale Broadband Connect) is a high speed broadband service which offers download speeds of up to 24Mbs and upload speeds of up to 1Mbs.

WBC ADSL 2+ Annex M

ADSL2+ Annex M offers up to 2.5Mbps upstream in the UK. This product is used by many businesses who could previously only find this level of upstream bandwidth with SDSL. Note that there is no option for a capped upstream with this product.

FTTC Range A (Clean)

FTTC Range A is a range where the circuits are deemed to be free of any copper line faults, and any local wiring issues (in a customer's premises). This range is often very wide for both upload and download, and does beg the question of why a copper line fault may exist without being fixed.

FTTC Range B (Impacted)

FTTC Range B is a range where circuits may have copper faults and/or internal wiring issues at a customer's site. The term impacted could be useful, as sometimes crosstalk is mentioned as something that impacts on line speeds, but there is no official word from BT on whether either Range A or Range B take into account the effects of crosstalk.

FTTP On Demand

Fiber to the home (FTTH), also called "fiber to the premises" (FTTP), is the installation and use of optical fiber from a central point directly to individual buildings such as residences, apartment buildings and businesses to provide unprecedented high-speed Internet access. FTTH dramatically increases the connection speeds available to computer users compared with technologies now used in most places.