Telephone Exchange
Treharris Telephone Exchange

Fibre Enabled

BT Logo Fibre to the Cabinet, Fibre to the Premises & Fibre on Demand services are available to customers connected to the Treharris exchange. Most customers can now upgrade from ADSL to fibre internet. Suppliers include BT Superfast Fibre, Plusnet Fibre Broadband, TalkTalk Fast Broadband, John Lewis Broadband & ee Unlimited Fibre Broadband

Local Authority = Merthyr Tydfil County Borough Council

UK area dialling code (STD code) for the Treharris exchange is 01443

International dialling code for the Treharris exchange is +44 1443 or 0044 1443

The Treharris exchange is in the Pontypridd group of exchanges.

18 telephone exchanges form this regional grouping.

OS Grid Ref: ST 10123 97097

Exchange Address

Located at :-
British Telecom,
Telephone Exchange,
Cardiff Road,
CF46 5EY

/// what3words geocode = Prayers Trickster Pump

Treharris -> Merthyr Tydfil -> Wales

See Location Map Below

Exchange Location

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Openreach Identifer

  • Network identifier code for the Treharris exchange is SWTEZ

Your LLU Services

 Telephone Exchange, Treharris (SWTEZ) has been unbundled by TalkTalk

Static IP Address

  • Plusnet offer their broadband customers the option of a "Static IP Address" for a one off charge of just £5. Make reliable VoIP calls, run a server, host a website or monitor CCTV remotely with a "Static IP Address" from Plusnet

Fibre To The Cabinet

  • The Treharris exchange provides fibre services.


  • This exchange has not been 21CN WBC enabled


  • The Treharris exchange has been enabled for ADSL Max since March 2006


  • The Treharris telephone exchange in Merthyr Tydfil was enabled for ADSL in December 2003

Ofcom Classification

  • The BT exchange, Treharris is classified by Ofcom as:- Market 2.

Historic Fact

  • Before PhONE Day On 16th April 1995, the STD Code For This Exchange Was 0443

PSTN Network Switch Off In 2025

The first stage Openreach propose to facilitate the retirement of their public switched telephone network (PSTN) is to issue 'Stop Sell' dates for specific telephone exchanges. Once a 'Stop Sell' date has passed, communication providers (CP's) will be unable to order any copper based products if a fibre solution is available at the customer's premises. Accepted fibre solutions include FTTP and SOGEA/SOGFast.

Impacted product and services that will be unavailable beyond a 'Stop Sell' date include WLR3 analogue, ISDN 2, ISDN 30, LLU SMPF, SLU SMPF, Narrowband Line Share and Classic products.

Openreach have identified 581 specific 'FTTP Priority Exchanges' that will be the first to receive 'Stop Sell' notices, see below.

Openreach have not identified the Treharris Exchange as a 'FTTP Priority Exchange' and the 'Stop Sell' date will be September 2023.

LLU services from TalkTalk are available from this exchange TalkTalk

LLU services from Sky are available from this exchange Sky