These gateway providers, in addition to simply spoofing the outgoing number, will also sell blocks of legitimate domestic numbers to the scammers- knowingly- to use for callback numbers. Truly disgusting

https://www.justice.gov/opa/pr/district-court-enters-permane...

Yea, I wasn't tryna call anyone out, there are legit use-case and I like Twilio approach and yet, it's so easy so fake a CID :(