https://steempeak.com/witnesses
On this page you can see which version are the witnesses running. Justin's sock puppet accounts are running the 22.5 version marked in blue, while the human Steem witnesses are running 22.1, 22.4444 and other versions.
RE: Review your witness votes NOW!!! Remove your votes from the following witnesses who have shut down their servers and help Steem. More than 65 mill SP is of no use at the moment.