Cannot browse to specific websites on home computer

[highlife]

I cannot browse to any websites on my home computer relating to a specific DNS (www.worldofwarcraft.com). Everytime I try I get a timeout error. I also tried pinging the site and get ping timeouts. This problem has been occurring for about 2-3 weeks and it happens in both FireFox and IE6.

I run windows XP Pro,have current up to date virus protection and ran a spyware/adware scan several times with nothing showing up. I run through a linksys router, but I am basically using out of the box default settings on that.

Any idea's how to fix this?