With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
atmNetPrefixTable
atm Net Prefix Table
1.3.6.1.4.1.351.110.1.4.1.1.1
A table implemented by the UNI Management Entity on the user-side of an ATM UNI port, containing the network-prefix(es) for ATM-layer addresses in effect on the user-side of the UNI.
Back to CISCO-MGX82XX-ATM-UNI-PORT-MIB MIB page.
IPHost Network monitor allows you to monitor atmNetPrefixTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.