This status change concerns the following RFCs: RFC 793, RFC 1065, RFC 1723, RFC 1725. These RFCs are Internet Standards, however they have been superseded by other RFCs, which are themselves Internet Standards:

RFC 793 obsoleted by RFC 9293 (STD 7)
RFC 1065 obsoleted by RFC 1155 (STD 16)
RFC 1723 obsoleted by RFC 2453 (STD 56)
RFC 1725 obsoleted by RFC 1939 (STD 53)

To reflect their correct status and use, this document reclassifies these RFCs as "Historic".