The Teletype Networking protocol (TelNet) is used to provide bidirectional interactive text-oriented communications. TelNet works close to the transport layer, so it can also intercept and manipulate traffic intended for other protocols. A TelNet server is accessed using a TelNet client that emulates the DEC VT100 terminal command set (other terminals like TN3270 and TN5250 can also be emulated if necessary), or with a Browser that understand the URI "telnet://". Many TelNet clients also understand ANSI control codes. Telnet is mostly used for remote login to a computer, as a remote database terminal, or as a communications portal to BBS, MOO and MU* servers. Interestingly, most versions of Windows include an easily activated TelNet server. Below are addresses for TelNet servers open to the public anonymously.
[IANA Port assignment = 23]

TelNet Servers - (listed by service)