T-Mobile is using PA certificates, I'm passing live traffic with them right
now. What I've heard so far intercarrier is just Comcast (private cert),
T-Mobile (STI-PA cert), Twilio (not sure), and us (STI-PA cert). Verizon and
AT&T have just been doing private interconnect from what I understand.
Paul, this is in reply to your question posted on July 24th: Currently there
are 34 active STI-GA SHAKEN participants authorized to exchange SHAKEN
tokens in the U.S. While Canada and the UK are working on SHAKEN, to my
knowledge there are no PA's or CA's to operate and approve new applicants in
th
