Seems porting is supported: https://support.twilio.com/hc/en-us/articles/223179348-Porting-a-Phone-Number-to-Twilio https://support.twilio.com/hc/en-us/article

Seems porting is supported: https://support.twilio.com/hc/en-us/articles/223179348-Porting-a-Phone-Number-to-Twilio https://support.twilio.com/hc/en-us/articles/223179348-Porti... I used one of their existing pool of numbers. For inbound short-code support, you have to contact support directly and agree to a legal T&C for them to enable it.