Can I port a number out of Sideline that I didn’t originally port-in? Follow Sideline subscription users can port a number out that they did not originally port in for a one-time port out fee of $19.99. For instructions on how to port out, click here. Questions? submit a request. Related articles Porting your number out of Sideline Why would we reject a port out request? Porting FAQs What information do I need to port my number out? How to port your number into Sideline Comments 0 comments Please sign in to leave a comment.