Is anyone else having problems with a changing IP address?

I'm having issues with my IP constantly changing as well.  I get the same added verification requirements as noted above.  At work I have to give our IT person my IP address for him to enter into the backend of our system so when I try to login it will see my IP address is already on the "guest list" and then grant me access.  Every time the power goes out or I have to reboot the tower it changes.  I'm starting to really feel back having to ask him to yet again enter in my new IP address.  I would really like to know if there is a IP range they are using for my area so I can provide that to my IT person keeping him from having to manually enter in each new IP address - very annoying.