Remove all unnecessary except ip-v4?

Question

Notepad++

How to remove everything unnecessary from a file of this type:

Nmap scan report for 192.168.0.21
Host is up (0.18s latency).
Not shown: 1 filtered port
Some closed ports may be reported as filtered due to --defeat-rst-ratelimit
PORT   STATE SERVICE
22/tcp open  ssh

Nmap scan report for 192.168.0.29
Host is up (0.029s latency).
Not shown: 1 filtered port
Some closed ports may be reported as filtered due to --defeat-rst-ratelimit
PORT   STATE SERVICE
22/tcp open  ssh

Nmap scan report for 192.168.0.25
Host is up (0.15s latency).
Not shown: 1 filtered port
Some closed ports may be reported as filtered due to --defeat-rst-ratelimit
PORT   STATE SERVICE
22/tcp open  ssh

So that the result is:
192.168.0.21
192.168.0.29
192.168.0.25

Answer 1

Find: (?s).*?(\z|\d+\.\d+\.\d+\.\d+)
Replace: $1\n
https://regex101.com/r/f4tDrt/1