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 How to port your number out of Sideline Porting FAQs How to port your number into Sideline What information do I need to port my number out? VoIP Calling & Call Quality Comments 0 comments Please sign in to leave a comment.