Telephone Exchange
Dyffryn Telephone Exchange

Fibre Enabled

BT Broadband Fibre to the Cabinet, Fibre to the Premises & Fibre on Demand services are available to customers connected to the Dyffryn exchange. Most customers can now upgrade from ADSL to fibre internet. BT Broadband is supplied via the Openreach Network. BT Broadband



Local Authority = Gwynedd Council

UK area dialling code (STD code) for the Dyffryn exchange is 01341

International dialling code for the Dyffryn exchange is +44 1341 or 0044 1341

The Dyffryn exchange is in the Barmouth group of exchanges.

8 telephone exchanges form this regional grouping.

OS Grid Ref: SH 58650 23270

Exchange Address

Located at :-
British Telecom,
Telephone Exchange,
Pentre Uchaf,
DYFFRYN ARDUDWY.
LL44 2HF

/// what3words geocode = Crouching Signature Nervy

Dyffryn -> Gwynedd -> Wales

See Location Map Below

Exchange Location



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Openreach Identifer

  • Network identifier code for the Dyffryn exchange is WNDYF

Fibre To The Cabinet

  • The Dyffryn exchange provides fibre services.

21CN WBC

  • This exchange has not been 21CN WBC enabled

ADSL Max

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

ADSL

  • The Dyffryn telephone exchange in Gwynedd was enabled for ADSL in February 2005

Ofcom Classification

  • The BT exchange, Dyffryn is classified by Ofcom as:- Market 1.

Historic Fact

  • Before PhONE Day On 16th April 1995, the STD Code For This Exchange Was 0341 7
Virgin Media

PSTN Network Switch Off In 2027

Openreach and the wider UK telecoms industry are retiring the old Public Switched Telephone Network (PSTN) and associated copper-based services as part of the move to an all-digital, internet-protocol (IP) based network.

The PSTN and associated wholesale copper services - including traditional analogue phone lines, ISDN2, ISDN30 and other legacy products - are being withdrawn.

These services historically relied on copper wiring connected from exchanges to premises. They will be replaced with digital alternatives such as Full Fibre (FTTP) and IP-based broadband services like SOGEA, SOGFAST and other All-IP products.

Originally planned for December 2025, the final withdrawal of the PSTN network has been rescheduled to 31 January 2027 to give more time for migration, particularly for vulnerable customers and specialist services. By this date, all legacy services that depend on the PSTN must be transitioned off the copper network.

Openreach have not identified the Dyffryn Exchange as a 'FTTP Priority Exchange' and the 'Stop Sell' date was September 2023.

Stop Sell is triggered when a majority (75%) of premises connected to a particular exchange can get ultrafast Full Fibre. Customers who then want to switch, upgrade or re-grade their broadband or phone service will have to take a new digital service over their new Full Fibre network.