UK Area Code information for Carmarthen

Carmarthen Area Code Allocation

Ofcom has allocated the 01267 area code to service Carmarthen and the surrounding area on at least 1 exchange.

The Residential Area of Carmarthen

More about Carmarthen?

Carmarthen comprises postcodes covering roughly 5,571km2 containing 820 commercial properties and 8,798 domestic properties.

Carmarthen Exchange Information

Carmarthen SWCT

The Carmarthen exchange has 820 commercial and 8,798 domestic properties.
Adsl Max
Fixed Rate
Wbc Fixed Rate
Wbc Adsl 2+
Wbc Adsl 2+ Annex M
Some postcodes covered by this exange include;
SA31 3BH
SA31 3AT
SA31 3AR
SA31 3AS
SA31 3AW
SA31 3AU
SA31 3AX
SA31 3AA
SA31 1BG
SA31 3BT
SA31 1BJ
SA31 3DG
SA31 3AY
SA31 3BE
SA31 3DF
SA31 3AZ
SA31 3BD
SA31 3BA
SA31 3AH
SA31 3BG
SA31 3BX
SA31 3BQ
SA31 3AP
SA31 3AL
SA31 3DU
SA31 3DQ
SA31 3BS
SA31 3LL
SA31 3AN
SA31 3DZ
SA31 3AG
SA31 3DP
SA31 3DW
SA31 3DE
SA31 3LB
SA31 3LF
SA31 3JY
SA31 3DY
SA31 3BY
SA31 3DX
SA31 3EB
SA31 3AJ
SA31 3BU
SA31 3AQ
SA31 3AE
SA31 1PZ
SA31 3EW
SA31 3BN
SA31 1PY
SA31 3JP

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.