https://www.cnet.com/news/fccs-ajit-pai-tells-carriers-to-combat-spoofed-robocalls-or-else/

"Uniform adoption will help improve authentication throughout the network and make sure no consumer gets left behind," Pai said in a press release (PDF). "This goal should be achievable for every major wireless provider, interconnected VoIP operator, and telephone company -- and I expect those lagging behind to make every effort to catch up."

This isn't the first time Pai has called on carriers to step up their game in combating spoofed calls, which come from numbers that may appear familiar but in fact are hijacked by scammers. Pai in November sent letters to the heads of AT&T, Comcast, T-Mobile, Sprint, Google and others, urging them to adopt the call authentication system and get it done in 2019.