Despite Activision's size and experience, their servers are often overwhelmed by the sheer number of players trying to connect, and the chances are they will suffer some issues during this period.
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If you want to find out the status of Call of Duty's servers, here's how to do it.
How to check the official status of Call of Duty servers
Compared to many other game developers/publishers, Activision are surprisingly open about their servers.
Players can visit the Activision support website to see the status of all Activision's recent games. This includes every Call of Duty title since Black Ops II, and Crash Team Racing Nitro Fueled.
Players can also filter the server status by their desired platform, while also seeing any recently resolved server issues.
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How to check Call of Duty servers in real-time
While Activision may be pretty transparent about their servers on this website, it doesn't mean every issue will be accounted for. This is why unofficial websites that offer real-time status of Call of Duty's servers are so popular.
The best of these is DownDetector. The website presents a graph of all the people claiming to have connection issues in Call of Duty over the last 24 hours.
If you see a spike in reported incidents, then the chances are there are wider connection issues.
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