Package listing comparison?

[Mads V. Pedersen]

> I found that my machines access URLs that look like the following when
> they connect to RHN, but the part after the date doesn't seem to be
> predictable, and i'm not sure what to put for the version string in the
> middle.
> 
> http://xmlrpc.rhn.redhat.com/XMLRPC/$RHN/redhat-linux-i386-9/listPackages/20030924151830
> http://xmlrpc.rhn.redhat.com/XMLRPC/$RHN/redhat-linux-i386-7.3/listPackages/20030924165059

The part after the date looks suspiciously like the time in 24 hr. 
format, e.g. 151830 is 3:18:30pm

-- mads