Here’s something handy for people still stuck on dialup, or with cable or DSL where they frequently change the IP address assigned to you.

http://ipupdate.virtualave.net/cgi-bin/myip.pl
http://dynupdate.no-ip.com/ip.php
http://ip.ChangeIP.com/ip.asp
http://dynamic.zoneedit.com/checkip.html
http://checkip.dyndns.org/
http://ipdetect.dnspark.com/
http://www.dnsart.com/myip.php
http://www.dnsart.com:7777/myip.php
http://checkip.dyndns.org:8245/
http://update.dynu.com/basic/ipcheck.asp

These are all links to scripts that will show your current IP address. The first few return only the IP address, while the others provide other info. Some are just as simple as lablling the address, others also show the hostname or other details too.