luke@server1 $ sudo yum repolist
Loaded plugins: rhnplugin, security
This system is receiving updates from RHN Classic or RHN Satellite.
repo id                        repo name                                                 status
acme-rhel-x86-64-server-5      ACME Packages (v.5 for 64-bit)                                 1
epel                           Extra Packages for Enterprise Linux 5 - x86_64             7,745
rhel-x86_64-server-5           Red Hat Enterprise Linux (v. 5 for 64-bit x86_64)         16,133
rhn-tools-rhel-x86_64-server-5 Red Hat Network Tools for RHEL Server (v.5 64-bit x86_64)    564
repolist: 24,443

luke@server1 $ grep -ri acme /etc/yum.repos.d /etc/yum/pluginconf.d

root@xxxxxxlp03 ~ $ rhn-channel -l
epel6-64bit
rhel-x86_64-server-6
rhn-tools-rhel-x86_64-server-6