I signed up for Global Entry as soon as the program was available to me (I am a non-US citizen/legal permanent resident green card holder). This was before PreCheck was included as part of Global Entry. I was approved for Global Entry and have happily been a member since then.

I became a member of PreCheck in late 2013 and my PreCheck number is different than my Global Entry number.

I received a notification from CBP/GOES that my Global Entry was expiring in August and to renew it, so I applied to renew it some weeks back. Today I received the notification that my renewal for Global Entry was approved, and I can use the program immediately. The notice states that my Global Entry number will also act as my Known Traveler Number for TSA PreCheck.

The PreCheck I had signed up for independently expires towards the end of this year. When I visit universalenroll.dhs.gov and click the "check service status" link, and enter my name/DOB, it says my program is active and returns my PreCheck number I was issued when I independently signed up for PreCheck in 2013.

I am unsure which PreCheck number I should be using - the one I was issued when I signed up originally in 2013, or my Global Entry number? I am obviously the same person and CBP/TSA has enough information about me to know I'm the same person, and I am absolutely sure I am not the first person to sign up for GE prior to TSA Precheck being an included benefit, then get Precheck, then renew GE after Precheck was added - so hopefully someone else has gone through this and can offer their wisdom on the matter?

Do I need to contact someone (who?) about this to sort it out? Or do I need to continue using my old TSA Pre # until it expires? Or just switch to the new GE number immediately? Or can I use either one interchangeably?

Thanks!