Old EE license number question

Hello, I am trying to find the EE license number for an older client’s site from likely 2011. Most of our licenses on the purchases page have companies/domains associated with them but a few do not. I suspect one of these unlabeled ones is the license I am looking for. Is there any way to figure out what domain a given license is associated with, or what license number is being used on a site?

Thank you!