Fygedew :
ive called my isp and they cant change it but can I? I have xfinity and I really need to change it. thank you.
Generally when you reboot as in shut it down and wait a couple minutes then plug the power back in to your equipment it changes your IP address, that said some providers do assign your main equipment (modem) a permanent public address.
Why do you need so urgently to change it, were you banned from a game or forum?