<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta content="text/html;charset=UTF-8" http-equiv="Content-Type"></head><body ><div style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt;"><div>Is there any requirement for an ISP to allow transferring IP's in use by a customer to another ISP?<br></div><div><br></div><div>In the telephone world, NANP requires local number portability such that a customer isn't beholden to a single carrier.<br></div><div><br></div><div>Case example: Long standing customer at a data center with a /24 IP block wants to move to another datacenter.<br></div></div><br></body></html>