With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL3IpCtrlIpSubnetMask
Switch L3 Ip Control Ip Subnet Mask
1.3.6.1.4.1.171.11.70.5.3.2.1.3.1.4
The IP net mask for this interface.
Back to SWL3MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL3IpCtrlIpSubnetMask 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 WiFi routers right now.