With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgprsAccPtMsTpduDstAddr
Cisco GPRS Access Point Ms Tpdu Dst Address
1.3.6.1.4.1.9.9.183.1.4.4
This object specifies the upstream TPDU destination address used by a MS that falls in the reserved range of IP addresses for PLMN devices.
Back to CISCO-GPRS-ACC-PT-MIB MIB page.
IPHost Network monitor allows you to monitor cgprsAccPtMsTpduDstAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.