A support ticket was put in to GameServers since some of us were having problems with our two Dallas server. The following is GameServer's response.
Ticket LRY-169NN has been updated by Alexander Zeid [staff].
I do apologise for the inconvenience that this is causing, Unfortunately, the Dallas location was affected by a large DDoS attack at a time just after you received the last reply to this ticket. It lasted for approximately 2-3 hours. As of this time, it has since ceased. Upon checking both servers in Dallas, Texas. They appear to now be online correctly. As far as the Blackops subscription goes, it is heavily occupied. As for the Battlefield 4 subscription, it is indeed online, however just in case it wasn't connecting to the backend correctly due to the previous disruption, a restart has been executed. Give the servers a test run to see how they now go.