Australia - https://www.donotcall.gov.au/
Canada - https://lnnte-dncl.gc.ca/en/Consumer/Register-your-number/!/
United Kingdom - https://www.tpsonline.org.uk/
United States - https://www.donotcall.gov/index.html
Australia - https://www.donotcall.gov.au/
Canada - https://lnnte-dncl.gc.ca/en/Consumer/Register-your-number/!/
United Kingdom - https://www.tpsonline.org.uk/
United States - https://www.donotcall.gov/index.html
In the Netherlands we used to have this, but the rules changed: unsolicited commercial calls are completely prohibited (so you don’t need to register and the registry has been shut down since 2021)
https://www.rijksoverheid.nl/onderwerpen/bescherming-van-consumenten/vraag-en-antwoord/ongewenste-telefoontjes-van-bedrijven-en-goede-doelen
The Dutch coming in clutch with sensible laws once again!