[user@enterprise ~]$ nmap 192.168.1.100

Starting Nmap 7.01 ( https://nmap.org ) at 2017-01-15 23:39 CET
Nmap scan report for some.domain.tld (192.168.1.100)
Host is up (0.00049s latency).
Not shown: 988 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
110/tcp  open  pop3
111/tcp  open  rpcbind
143/tcp  open  imap
443/tcp  open  https
548/tcp  open  afp
993/tcp  open  imaps
995/tcp  open  pop3s
2049/tcp open  nfs
5000/tcp open  upnp
8080/tcp open  http-proxy

Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds
[user@enterprise ~]$ nc -v 192.168.1.100 995
found 0 associations
found 1 connections:
     1:	flags=82<CONNECTED,PREFERRED>
	outif lo0
	src 127.0.0.1 port 52613
	dst 127.0.0.1 port 12995
	rank info not available
	TCP aux info available

Connection to 192.168.1.100 port 995 [tcp/pop3s] succeeded!
^C
[user@enterprise ~]$ nc -v 192.168.1.100 993
found 0 associations
found 1 connections:
     1:	flags=82<CONNECTED,PREFERRED>
	outif lo0
	src 127.0.0.1 port 52621
	dst 127.0.0.1 port 12993
	rank info not available
	TCP aux info available

Connection to 192.168.1.100 port 993 [tcp/imaps] succeeded!
^C
[user@enterprise ~]$ nc -v 192.168.1.100 143
found 0 associations
found 1 connections:
     1:	flags=82<CONNECTED,PREFERRED>
	outif lo0
	src 127.0.0.1 port 52646
	dst 127.0.0.1 port 12143
	rank info not available
	TCP aux info available

Connection to 192.168.1.100 port 143 [tcp/imap] succeeded!