DNS uses port 53. DNS queries are generally performed via UDP, and zone transfers are normally done via TCP.
53..
DHCP listens for incoming on UDP 67 and send out on UDP 68 For 'well known' and 'registered' ports, you can check http://www.iana.org/assignments/port-numbers too. by gerson.freire@terra.com.br
TCP has no default port. Individual applications - such as FTP, DNS, or Telnet - do have default ports.
The default port number depends on the protocol. If a URL starts, for example, with "http://", then the default port number will be 80. For other protocols, other default port numbers are used.The default port number depends on the protocol. If a URL starts, for example, with "http://", then the default port number will be 80. For other protocols, other default port numbers are used.The default port number depends on the protocol. If a URL starts, for example, with "http://", then the default port number will be 80. For other protocols, other default port numbers are used.The default port number depends on the protocol. If a URL starts, for example, with "http://", then the default port number will be 80. For other protocols, other default port numbers are used.
Implicit FTPS runs on port 990 by default.
Default HTTP port number is 80.
The default Port number for Active Direcotory server is 389
port 80
port 23
By default, your minecraft port number is 25565, unless you've changed it this is your port number.
Port 53
110
80