Have you ever heard a callsign and said "Gee, I wonder who that is?" Well,
now you can find out. There are multiple methods of finding out who a
callsign is. The two methods discussed here rely on the
QRZ.com web site lookup.
The easiest method is to send a message to WHO-IS with the callsign as the only
text in the message. This returns a one line message with the information
you are looking for. If you want full information, add "f " before the
call to get a multi-line response
AE5PL-10>APRS::WHO-IS :ae5pl
AE5PL-10>APRS::WHO-IS :f ae5pl
WHO-IS is a javAPRSQRZ application written in Java and makes XML to access
online.qrz.com information. You can also use WHO-15 (fifteen) to
accommodate those living in areas where the IGate is either out-of-date or the
sysop has turned on callsign filtering for gated packets. Both servers
perform exactly the same and may be used interchangeably.