If using default/individual static IP provisioning, the highest IP address(es) issued to you will be reclaimed. If you wish to elect specific IPs to retain, please contact Technical Support before submitting your change order.
If you elected CIDR provisioning at the time of install, your existing IPs will change and a new CIDR block will be issued to you.
See “Does Omni Fiber Internet support additional static IPs in a contiguous CIDR block for use in a WAN/LAN style configuration?” for more info.