TCP port 389 is commonly used for Lightweight Directory Access Protocol (LDAP)
Port No. for Tranmission Control Protocal (TCP) is 6 Port No. for User Datagram Protocol (UDP) is 17
TCP port 80
I am not sure how to unlock a TCP port on a phone. You will have to tell me what kind of phone you are using.
port 389
TCP port numbers, as well as UDP port numbers, are 2-byte numbers, therefore, the range is from 0 to 65535.
ICMP does not have a port like TCP and UDP.
used TCP port 110.
Port 1151 is used for TCP/UDP
A single port can be configured to listen for UDP or TCP inbound connection requests (or both). Telnet uses TCP. So when you telnet to a specific IP:port, telnet will attempt to make a TCP connection. If there is no TCP listener on the port you specify, then the connection request will be refused. It matters not if you have a UDP listener on the port. Telnet will not be able to establish a connection to a UDP port.
An SMTP port is the port used to transfer email using the SMTP protocol. Typically SMTP is configured to use TCP port 25, although some servers will use TCP port 587.
TCP port 21
You can connect to an open port, for instance, 80 TCP port is a standard port for web pages.