I've had residential service from Comcast for about 4 years and I still have the same IP address that I started out with. While it CAN change every time the modem reboots, mine never has. YMMV. Jim. On 06/13/2015 03:45 PM, Boris Borisov wrote: > I have residential and my ip stays the same for past two months even > I've had modem power rebooted few times. How often is supposed to change?