Are the older CoD games still active online?

Hey there,

A friend of mine saw some CoD games on sale for OS X and was wondering if the online community for CoD 1: UO and/or CoD 2 is still active in the US.

Thank you!

I still have my copies of COD1 and UO. I should install them for ole nostalgia's sake. :)

Would love to play some Foy again!

COD: UO is was my favorite online multiplayer game. I don't know how active it is but it was way more enjoyable than current CODs multiplayers

I believe COD4 has always had an active online playerbase, correct me if I'm wrong.