Can't change your IP address. It's assigned by your ISP. Either to your computer or the device that routes IP. (usually a router for most)
All other IP addresses gained internally are USUALLY 192 or 10 to start but whatever you want will work fine.
If you are having issues, hard reset your router and reset the settings. (security etc)
If you for some reason have a ban because of IP, well unplugging your cable modem for about an hour or so MIGHT do it but I doubt. Usually at least 24 hours until your 'lease' expires and it's given off to someone else that grabs it on your subnet. Chances are though unless you are in a dense population, the old IP will be reassigned to you. (via your cable modem or directly into your computer).
In short: one IP per customer and it's not static. If you want a perm IP address you will have to pay more. And prolly explain why. So your router dishes out more IP address for your 'internal' network.
Do not confused internal (your home pc, xbox etc) with your external IP adress (whatever is assigned to your router/cable modem)