How to check telnet port is working from linux

[applprod@indprod log]$ nc -v imapoutlook.abc.com 993
Ncat: Version 6.40 ( http://nmap.org/ncat )
Ncat: Connected to 30.110.92.50:993.
^C
[applprod@indprod log]$ nc -v smtp.abc.com 587
Ncat: Version 6.40 ( http://nmap.org/ncat )
Ncat: Connected to 30.110.92.50:587.