4 ms·It should be assumed they check the phone number provider and block twilio as a spam prevention technique.by hirsin 8y agoIt should be assumed they check the phone number provider and block twilio as a spam prevention technique.JoshMnem 8y agoHow can they detect Twilio numbers but still let scammers robocall my phone on a daily basis via bandwidth.com's API?jstanley 8y agoEven where this doesn't happen, Twilio block messages of the form "Your Google verification code is 123456" so you can't receive them anyway.