Thanks for asking. I'm quite certain it's not an X1 box because when I go to https://www.xfinity.com/support/articles/self-service-set-top-box-program-non-x1-remote, which contains instructions for how to program a non-x1 remote to control other hardware besides the box, I do recognize the remote(s) that are pictured. ( I do have two different remotes for the one box).
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