UK telephone exchange · Openreach stop-sell tracker
Sidcup telephone exchange
Sidcup serves Greater London - Bexley and carries the Openreach exchange code LSSID. Copper stop-sell restrictions have been in force here since 4 June 2024 (Tranche 12).
Stop-sell status
In force
since 4 June 2024
Exchange code
LSSID
Tranche 12
Analogue switch-off (national)
31 Jan 2027
PSTN retirement — every UK exchange
What this means if you’re on the Sidcup exchange
Openreach places an exchange on the FTTP priority list once full fibre reaches roughly 75% of the premises it serves. From the restriction date, any premises here that can order full fibre can no longer take out new copper services — analogue phone lines, FTTC broadband, working-line takeovers. Nothing is switched off on that date: existing lines keep working until your provider migrates you ahead of the national PSTN retirement on 31 January 2027.
When migration happens your number stays the same — local landlines here use the 020 dialling code for London, which is unaffected by the switch-off. If a call from an unfamiliar local number is what brought you here, run it through the lookup to see the Ofcom range holder and live reputation reports.
Nearby exchanges
- BexleyheathGreater London - Bexley · LSBEX2 August 2022
- CrayfordGreater London - Bexley · LSCRAY9 May 2023
- ErithGreater London - Bexley · LSERI8 August 2023
- BalhamGreater London - Wandsworth · LSBAL8 February 2023
- BetchworthBrockham · LSBET25 January 2022
- Burgh HeathEwell · LSBURH13 October 2021
- ChertseyChertsey · LSCHERTBD
- ChessingtonGreater London - Kingston upon Thames · LSCHES4 June 2024
Related lookups
FAQs about the Sidcup exchange
Is the Sidcup telephone exchange closing?
Sidcup (code LSSID) is on Openreach's FTTP priority stop-sell list — copper sales restrictions have applied since 4 June 2024. The building isn't shutting yet, but analogue (PSTN) service ends nationally on 31 January 2027, and premises with full fibre available here can no longer order new copper products.
What does stop sell at Sidcup mean for my landline?
Existing services keep working — stop sell only blocks new supply of copper products (new analogue lines, copper broadband, transfers between providers on copper) at premises where full fibre is available. When your provider migrates you, your phone number stays the same and calls move to digital voice over broadband.
Which numbers come from the Sidcup exchange?
Sidcup serves the London area, where landlines use the 020 dialling code. Bear in mind UK numbers are portable, so a 020 number no longer proves a physical line on this exchange — use the lookup to check any specific number.
Source: Openreach FTTP Priority Exchange stop-sell ancillary document (© British Telecommunications plc), republished as facts with attribution. Dates reflect the most recent published document revision; always confirm migration plans with your own provider.