Currently, STIR/SHAKEN is only required for VOIP and intermediate carriers but a lot of carriers have implemented or are in progress. Here's a recent report fr

Currently, STIR/SHAKEN is only required for VOIP and intermediate carriers but a lot of carriers have implemented or are in progress. Here's a recent report from the GSMA: https://www.gsma.com/get-involved/gsma-membership/gsma_resources/tns-2024-robocall-investigation-report-stir-shaken-implementation-paying-off-for-top-us-carriers/ https://www.gsma.com/get-involved/gsma-membership/gsma_resou... > Signed traffic between Tier-1 carriers increased to 85% in 2023 We're getting there, just not soon enough. The whole world will have transitioned to never answering their phone before this actually is fully enforced.