shaw.ca
you probably have a cable modem, right?!
shaw normally offers "some kind of" dynamic ips..
the ip changes when you log on but is not always different (although it changes you mostly get the same ip).

when you want to have a static ip, just do not dial out... just keep online all the time and you have what you want.

if you want to check it just log in and out several time and always check your ip address online. you can for example do this on http://www.phorax.com/v5.3/htdocs/service/webTools.php

greets