We're planning on saving the twilio call ids on our side for specific reasons. For efficiency, it would better for us to store them as uuid instead of varchar.

From our tests, the call ids we are getting are 34 characters long and start with 'CA'. We want to know if this is always the case.

Is it safe for us to store the 32-character id (without first two characters) in our database as uuid? Will this be unique?