First Message on the Internet


This is the log of the first message sent on the Internet.

October 29, 1969

UCLA student Charley Kline attempts to transmit the text “login” to a computer at the Stanford Research Institute over the first link on the ARPANET, which was the precursor to the modern Internet. After the letters “l” and “o” are sent the system crashed, making the first message ever sent on the Internet “lo”. About an hour later, after recovering from the crash, the full text of “login” is successfully sent.



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  • Deborah J. Boyd

    Who was the message sent to ? Did they use TCP or something else?

    • The message was sent from UCLA to the Stanford Research Institute.

      The protocol was not TCP, as that was developed in the 1970’s. The actual protocol used was defined in RFC 1. It did not have a name at the time, but later became known as NCP (Network Control Program). This explanation may not be entirely correct, as the information about the details of the protocol I found are a little ambiguous. However, I think this is pretty close. I certainly welcome anyone who was more intimate knowledge of the early ARPANET to comment further.

    • Abdelhak Djilali Souidi

      The tcp / ip protocols are designed in 1981

  • Fascinating. This tidbit of nugget back then was unheralded but little did they know that in 50 years time, messaging is an everyday thing over the internet.

  • IDK_Fred

    Tinder says there is nothing wrong with sending the first message…. they are all liers over there at tinder

    • Jonilo5

      Hehe. Do you mean that the system will crash if one send the first message? 😛

      (Side note – Thinking over using Tinder, but is it worth it?)

  • Todd Smith

    I remember the ARPANET. the DOD gave it away when it upgraded to Autodin