If you are in physical reach of the switch, you could attach yourself to the console port at the back of the switch and login from there to check the IP-address (look for either "interface VLAN1" or another VLAN-interface which is NOT in the "shutdown" state).
If you have another Cisco-device connected to the switch and the CDP protocol runs on both the switch and the other device, you could do a "show cdp neighbor detail" and look for the IP-address there.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...