Yeah, it's mostly wireless carriers at least for now. Already T-Mobile and I think ATT are rolling this out to consumers, called Certified Caller ID I think. However, the FCC is coming down hard on all carriers for this. I don't know if there's any fines for not having it implemented, but I know Chairman Pai said he expected it to be implemented this year. Obviously, telecom moves slow and it's not possible for all carriers. Even some SBCs I'm sure don't support it (specialized call handling hardware). It will be interesting what kind of legal requirements they put in place with regards to this. I think they will try to strong arm all carriers soon.