how can I verify that my netgear modem is properly activated with xfinity?

I recently activated a Netgear cable modem (Model CM1200) to use with my Xfinity Internet through the Xfinity app. Everything seemed to go okay but I never got confirmation of successful activation. It seems to be working but I want to make sure I'm getting the full benefits and speeds of my internet plan. Is there a way I can verify proper activation? Is it okay to "re-activate" over the existing activation? Thanks in advance for any help.