NTP - Network Time Protocol: Cox server?

I've searched everywhere I can to see if there's an on-network NTP service I can sync to. I know there's lots of them out there... but if there's one on the Cox network, I'd prefer to connect to that (assuming it's reliable). And if there already is one... why doesn't it show up when searching for "NTP"? (A search for "time" brings up a huge batch of unrelated entries.) Thanks! Ray