[Help] Different Sites Tell you differen't IP's Which one is the Offical site?

I have been checking to see if my IP is correct But, when i go to sites where they say they can tell you your IP, Some are different from the other sites. I really want to find out whats my Real IP cause i'm having problems with Friends who can't see my Match Server, Does anyone know which site is trustable?
Lets say my IP is 165.21.154.99 , the last 2 numbers of the IP keeps on changing and i don't know which one to pick, sometimes it even goes to 3 digits.

This is from the first web i went into :
http://img523.imageshack.us/img523/434/firstipib6.png

This is the second web i went into :
http://img299.imageshack.us/img299/5264/ipyw8.png

Both are different...so ireally don't know how to get my IP =/

gimme some example of the two sites you meant

Try What Is My IP Address? - IP Address Lookup, IP Address Info, Speed Test, and more
Donno if it's correct but i always follow it.

uhh wait let me upload pics from 2 different websites.

k done.

try ipchicken.com

isn't the second pic IP chicken? <,<'

Somethings messed up with your internet. is the router near you? if it is. try rebooting then checking again. the IP only changes normally when you restart the modem/router

Maybe your ISP is a nutter?

yes my router is near me, uhh how do i do that? <,<' uhh when i put 127.0.0.1 IP in the system.mrs i can see the server and access it but when i put these IP address i find on ths sites i can't see the servers.Do you have anyidea how to fix it? =/