Maybe I'm confused with what rheine is asking. I thought he/she would just print the TN and look at what Key 0 or Key 1 has. If it shows SCR 2222 1 for example the CLID table for that phone is using CLID 1. Default is 0. So, we got jammed by having our agent build at CLID 0 cuz now I can't use default when building new phones for rolling out staff. Lesson learned - build agents (fairly static as CLID 1 or higher) ... I came from a site that used default for pretty much everything so I often forget to enter the CLID. At least know I build templates in Element Manager so anyone I train can build a phone that is not familiar with command line.
Yes, TNB report is also pretty good. I don't use reports as much as some probably do.