Does anyone know if Blizzard permanently bans IPs?

Sometimes I temporarily cannot connect to battle.net through Diablo2 nor their website. The website just plain won't load and it is stuck at querying gateway for diablo2. This has been going on for approx 12 hours now. I am 100% sure it isn't my computer, as I've tested it with 3 other computers on my network and none of them have access either.

Just wondering if my IP is permanently banned so I'll have to go change it...