netdiscover

Good for finding networks!!!

Passively discover networks/IPs

sudo netdiscover -P

I recommend running this in tmux. Because once you let netdiscover run a while, you can use tmux to scroll back up into the log buffer and highlight all results and save to a file. Then you can parse out just the IPs in a sorted list with:

cat netdiscover.txt | awk '{print $1}' | sort -n