RFC Status Reference Notes
748 Unknown M. Crispin (1 April 1978), TELNET RANDOMLY-LOSE Option, IETF, doi:10.17487/RFC0748, RFC 748, https://datatracker.ietf.org/doc/html/rfc748  This is an April Fools' Day Request for Comments.
750 Obsolete J. Postel (January 1981), ASSIGNED NUMBERS, IETF, doi:10.17487/RFC0750, RFC 750, https://datatracker.ietf.org/doc/html/rfc750  Obsoleted by RFC 755. Obsoletes RFC 739.
760 Obsolete J. Postel, ed. (January 1980), INTERNET PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION, IETF, doi:10.17487/RFC0760, RFC 760. IEN 128, https://datatracker.ietf.org/doc/html/rfc760  Obsoleted by RFC 791. Replaces IEN 123, 111, 80, 54, 44, 41, 28 and 26. Updated by RFC 777.
761 Obsolete J. Postel, ed. (January 1980), DOD STANDARD - TRANSMISSION CONTROL PROTOCOL, IETF, doi:10.17487/RFC0761, RFC 761. IEN 129, https://datatracker.ietf.org/doc/html/rfc761  Obsoleted by RFC 793 and 7805. Replaces: IENs 124, 112, 81, 55, 44, 40, 27, 21, and 5.
764 Obsolete J. Postel, ed. (June 1980), TELNET PROTOCOL SPECIFICATION, IETF, doi:10.17487/RFC0764, RFC 764. IEN 148, https://datatracker.ietf.org/doc/html/rfc764  Obsoleted by RFC 854.
768 Internet Standard 6 J. Postel, ed. (28 August 1980), User Datagram Protocol, IETF, doi:10.17487/RFC0768, STD 6. RFC 768, https://datatracker.ietf.org/doc/html/rfc768 
776 Obsolete J. Postel (January 1981), ASSIGNED NUMBERS, IETF, doi:10.17487/RFC0776, RFC 776, https://datatracker.ietf.org/doc/html/rfc776  Obsoleted by RFC 790. Obsoletes RFC 770 and IEN 127.
777 Obsolete J. Postel (April 1981), Internet Control Message Protocol, IETF, doi:10.17487/RFC0777, RFC 777. IEN 128, 109, https://datatracker.ietf.org/doc/html/rfc777  Obsoleted by RFC 792. Updates RFC 760.
778 Historic D.L. Mills (April 1981), DCNET Internet Clock Service, IETF, doi:10.17487/RFC0778, RFC 778, https://datatracker.ietf.org/doc/html/rfc778 
781 Unknown Zaw-Sing Su (May 1981), A SPECIFICATION OF THE INTERNET PROTOCOL (IP) TIMESTAMP OPTION, IETF, doi:10.17487/RFC0781, RFC 781, https://datatracker.ietf.org/doc/html/rfc781 
783 Unknown K. R. Sollins (June 1981), THE TFTP PROTOCOL (REVISION 2), Network Working Group, doi:10.17487/RFC0783, RFC 783, https://datatracker.ietf.org/doc/html/rfc783  Obsoleted by RFC 1350.
790 Obsolete J. Postel (September 1981), ASSIGNED NUMBERS, Network Working Group, doi:10.17487/RFC0790, RFC 790, https://datatracker.ietf.org/doc/html/rfc790  Obsoleted by RFC 820. Obsoletes RFC 776, 770, 762, 758, 755, 750, 739, 604, 503, 433 and 349.Obsoletes IENs: 127, 117, 93.
791 Internet Standard 5 J. Postel, ed. (September 1981), INTERNET PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION, IETF, doi:10.17487/RFC0791, STD 5. RFC 791. IEN 128, 123, 111, 80, 54, 44, 41, 28, 26, https://datatracker.ietf.org/doc/html/rfc791  Obsoletes RFC 760. Updated by RFC 1349, 2474 and 6864.
792 Internet Standard 5 J. Postel (September 1981), INTERNET CONTROL MESSAGE PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION, Network Working Group, doi:10.17487/RFC0792, STD 5. RFC 792, https://datatracker.ietf.org/doc/html/rfc792  Updates RFC 760, 777, IENs 109, 128. Updated by RFC 950, 4884, 6633 and 6918.
793 Obsolete J. Postel, ed. (September 1981), TRANSMISSION CONTROL PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION, IETF, doi:10.17487/RFC0793, STD 7. RFC 793. IEN 129, 124, 112, 81,55, 44, 40, 27, 21, 5, https://datatracker.ietf.org/doc/html/rfc793  Obsoleted by RFC 9293. Obsoletes RFC 761. Updated by RFC 1122, 3168, 6093 and 6528.