Call of Duty Black Ops 4 Server Status: How to Check Server Status

Call of Duty Black Ops 4 server status, like any server status, can occasionally change from right as rain to belly up. Players can be unable to connect to the game's servers for any number of reasons. Here's how to find out whether or not the servers are online.
Hey Xbox players, the “you’re too early” has been resolved. Please let us know if you are still experiencing the issue.
— Activision Support (@ATVIAssist) September 19, 2019
Enjoy the Beta.
Call of Duty Black Ops 4 Server Status: How to Check Server Status
Activision is fairly vigilant about keeping track of its games' server statuses. For Call of Duty Black Ops 4, players can check the game's support page on Activision's website. There they'll see a breakdown of the game's online availability on PlayStation 4, Xbox One and PC. They can also report outages and cycle through troubleshooting steps.
For an explanation of any downtime, players can check the official Activision Support Twitter account. If the downtime is planned, a reason will typically appear on that account's feed. If not, the downtime will be addressed once it reaches a critical mass or a solution is found.