Blocking equipment installed on phones belonging to older and more vulnerable Angus residents has prevented 81,643 nuisance calls from getting through.
Angus Council has installed 154 trueCall units free of charge to phones since 2013, with the aim of preventing scam calls from reaching their targets.
The protected phones received about 41 calls per month, two times the national average, with 99% being blocked.
Feedback has been overwhelmingly positive, with families saying it has allowed elderly relatives to live in their own homes for longer, reduced their fear of cold calls and improved their quality of life.
Mark Hodgkinson, adult protection and review officer for Angus Health and Social Care Partnership, said: “The scale of the problem with scammers is massive.
“We’re proud of what we have done locally.”