With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
agentTrustHostIPSubnetMask
agent Trust Host IP Subnet Mask
1.3.6.1.4.1.171.12.1.2.10.1.1.4
Specifies the IP subnet mask of the Trust Host.
Back to AGENT-MIB MIB page.
IPHost Network monitor allows you to monitor agentTrustHostIPSubnetMask on D-Link device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring D-Link access points right now.