Choice Privileges - corporate codes

Excuse my post but I've never been on this site and not sure how to use it but am looking for a list of usable corporate codes for hotels?

Check with your company to see if they have a corp, code. I would think most hotels would require an id at check in if you use a corp. code.

FYI, my corp. code only gives me a "few dollars" discount over the senior rate if even that.