With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
managementDomainLastChange
management Domain Last Change
1.3.6.1.4.1.9.9.46.1.2.1.1.6
The time at which the Configuration Revision Number was (last) increased to its current value, as indicated in the most recently received VTP advertisement for this management domain when managementDomainVersionInUse is not version3(4) or in the most recently received VTP VLAN database advertisement for this management domain when managementDomainVersionInUse is version3(4). The value 0x0000010100000000 indicates that the device which last increased the Configuration Revision Number had no idea of the date/time, or that no advertisement has been received.
Back to CISCO-VTP-MIB MIB page.
IPHost Network monitor allows you to monitor managementDomainLastChange 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.