This app was mentioned in 3 comments, with an average of 4.67 upvotes
If that's the IP address of your NAS, then that would be the first place I'd look. Make sure there's no DHCP server enabled on your NAS. If that turns out to be a dead end, you could try installing LanDroid from Google Play. Then, open the app and tap LocalNet. It will show you your current IP settings, including the IP address of the server that assigned your DHCP address.
https://play.google.com/store/apps/details?id=net.fidanov.landroid
Seems like the landroid link is set to termux in the op. Here it is.
LanDroid. It just does so much stuff and is incredibly useful.