PSTN Switch Off in 2025
We’re all familiar with the copper wire telephone network: in use since 1876, it’s kept business communications’ going for years. But that’s all about to change.
In 2025, the Public Switched Telephone Network (PSTN) is being switched off by BT Openreach, which means everyone, including businesses, currently using PSTN-based services will need to move to another service before then.
The alternative? Voice over Internet Protocol (VoIP), a solution that transmits voice calls and data using an internet connection.
This is a major step towards the United Kingdom’s mass IP-network migration, with VoIP core networks set to replace all the legacy PSTN services in just a few years’ time.
Embrace the future of telephony by replacing your landline with VoIP before the Public Switch Telephone Network (PSTN) is switched off in 2025.
What dates do I need to know?
PSTN Switch Off and Landline Replacement Timeline
November 2017
BT Openreach announces its intention to switch off the PSTN in 2025.
September 2023 - UK Stop Sell
Customers across the whole country cannot purchase new ISDN lines or add new features.
December 2025 - UK End of Life
The PSTN network is completely switched off across the UK.
How do I use this Priority Exchange Switch Off Map?
This map plots which exchanges will undergo a “stop sell” as the nation moves to an All IP.
Openreach has announced 297 priority exchanges for stop sell of PSTN services by April 2022
You can track which exchanges are switching off, and when via our map
- This map is built on Google Maps, and so can be navigated as you would use any online map
- The priority exchanges have been categorised into 4 “tranches” which go in order of “stop sell” dates – these can be viewed on the left-hand side of the map
- Each Exchange has detailed information including exchange code, postcode, SI number, stop sell date, and helpful FAQ’s.
