Note : Port must be listening to othe other end 
If Not you can start a listener using this

--------------------------------
-- Start a Listener on port 5500
--------------------------------
nc –l 5500 &

To validate, let’s use netstat command

--
[root@Chandan ~]# netstat -anlp |grep 5500
tcp       0     0 0.0.0.0:5500    0.0.0.0:*     LISTEN    21085/nc 



--------------------------------
-- Test Port is open or not
--------------------------------

nc -vz HOST_or_ip  PORT

Example root# nc -vz plkgg.abc.com  1521


Windows/Linux
telnet HOST_or_ip  PORT




# nmap 192.168.1.8 -p 80
Starting Nmap 7.70 ( https://nmap.org ) at 2019-03-16 04:30 IST
Nmap scan report for 192.168.1.8
Host is up (0.00036s latency).

PORT   STATE  SERVICE
80/tcp closed http

Nmap done: 1 IP address (1 host up) scanned in 13.07 seconds