$ nmap -p5900 10.36.0.0/16 | grep -B3 open

Interesting ports on 10.36.2.6:
PORT     STATE SERVICE
5900/tcp open  vnc

Interesting ports on 10.36.2.8:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.25:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.46:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.73:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.108:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.110:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.127:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.212:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.2.249:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.4.13:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.101.14:
PORT     STATE SERVICE
5900/tcp open  vnc
--

Interesting ports on 10.36.112.11:
PORT     STATE SERVICE
5900/tcp open  vnc

Interesting ports on 10.36.112.12:
PORT     STATE SERVICE
5900/tcp open  vnc

Interesting ports on 10.36.112.13:
PORT     STATE SERVICE
5900/tcp open  vnc

Interesting ports on 10.36.112.14:
PORT     STATE SERVICE
5900/tcp open  vnc