With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cContextMappingEntry
Cisco Context Mapping Entry
1.3.6.1.4.1.9.9.468.1.1.1
Information relating to a single mapping of cContextMappingVacmContextName to the corresponding VRF, the corresponding topology, and the corresponding routing protocol instance.
Back to CISCO-CONTEXT-MAPPING-MIB MIB page.
IPHost Network monitor allows you to monitor cContextMappingEntry 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.