The only evidence I see here is that NW's and AA's computer systems behave differently from those of UA. No contradictory testimony. I'm trying to think back on the time I saw a CRT with my trip's PNR displayed (this was on a tour of a UA reservations facility; I don't think they - officially at least - allow this any more) ... it had my MP status (the famous dollar-sign surrounded field), upgrade status, and I believe there was a field for meal requests. As well as bunches of other stuff; I don't recall a contact number field, but whenever I offer an en route number to an agent, it does get typed in SOMEWHERE.