Have you tried the display ip interface brief command?
P.S.
If you manage the DHCP Server which is actually releasing the IP address to your Switch and you aren't able to understand what that IP address is...is quite funny...shouldn't be quite simple to see actual active DHCP bindings? ...isn't it? look for the MAC Address stamped on your HPE OfficeConnect 1950 on your DHCP Binding Logs.