~ $ nmap -sV /404/
Starting Nmap 7.95 ( https://nmap.org )
Nmap scan report for /404/
Host is down. Failed to resolve.
┌──────────────────────────────────────────────┐
│ STATUS : 404 host unreachable │
│ REASON : the path you typed isn't here │
│ ACTION : try the nav, or hit / │
└──────────────────────────────────────────────┘
~ $