Seems like there's an epidemic of loss of service. Even with new modems. See following thread.
Experienced drop last night and tried hitting my router, modem and cox ip.
Modem status lights all normal showing connectivity, however no surf. Ping router & modem with no problem. But request times out when pinging outside ip. Hard reset on modem and back online, but status page on router partially blank for modem ip & dns addresses.
Tech scheduled for tomorrow afternoon. I don't want to throw equipment at this issue if the equipment is not the problem.