John wrote:

I'm trying to find an expired call sign. If anyone has an old FCC
database, I'd appreciate someone looking up the call sign KU5588.

This call sign is accessing a local GMRS repeater. I assume the
person's license is expired. If so, they no longer have GMRS operating
priveleges and need reported to the FCC for violations.

I tried a google search for the call sign and came up with nothing.
Then I tried the call sign for my old CB FCC call sign. Still nothing.
Then, I put in an obscure call sign. Its a call sign for a micro-wave,
studio to transmitter link for a commercial station. Wallaaa! Tons
of information.

That doesn't mean that KU5588 doesn't exist, just that google can't
find it. But all the obscure call signs I put in that I know are good,
google found them. Maybe a co-winkidink.