With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c3gHomeAddr
Cisco 3G Home Address
1.3.6.1.4.1.9.9.661.1.2.5.2.1.10
A unicast routable address assigned to a Mobile Node, used as the permanent address of the Mobile Node.
Back to CISCO-WAN-3G-MIB MIB page.
IPHost Network monitor allows you to monitor c3gHomeAddr 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.
