| 496 | TNLS quick reference card is availableM.F. Auerbach | Unknown | April 1973 |
| 497 | Traffic Statistics (March 1973)A.M. McKenzie | Unknown | April 1973 |
| 498 | On mail service to CCNR.T. Braden | Unknown | April 1973 |
| 499 | Harvard's network RJEB.R. Reussow | Unknown | April 1973 |
| 500 | Integration of data management systems on a computer networkA. Shoshani, I. Spiegler | Unknown | April 1973 |
| 501 | Un-muddling "free file transfer"K.T. Pogran | Unknown | May 1973 |
| 503 | Socket number listN. Neigus, J. Postel · obsoleted by RFC 739 | Unknown | April 1973 |
| 504 | Distributed resources workshop announcementR. Thomas | Unknown | April 1973 |
| 505 | Two solutions to a file transfer access problemM.A. Padlipsky | Unknown | June 1973 |
| 506 | FTP command naming problemM.A. Padlipsky | Unknown | June 1973 |
| 508 | Real-time data transmission on the ARPANETL. Pfeifer, J. McAfee | Unknown | May 1973 |
| 509 | Traffic statistics (April 1973)A.M. McKenzie | Unknown | April 1973 |
| 510 | Request for network mailbox addressesJ.E. White | Unknown | May 1973 |
| 511 | Enterprise phone service to NIC from ARPANET sitesJ.B. North | Unknown | May 1973 |
| 512 | More on lost message detectionW. Hathaway | Unknown | May 1973 |
| 513 | Comments on the new Telnet specificationsW. Hathaway | Unknown | May 1973 |
| 514 | Network make-workW. Kantrowitz | Unknown | June 1973 |
| 515 | Specifications for Datalanguage, Version 0/9R. Winter | Unknown | June 1973 |
| 516 | Lost message detectionJ. Postel | Unknown | May 1973 |
| 518 | ARPANET accountsN. Vaughan, E.J. Feinler | Unknown | June 1973 |
| 519 | Resource EvaluationJ.R. Pickens | Unknown | June 1973 |
| 520 | Memo to FTP group: Proposal for File Access ProtocolJ.D. Day | Unknown | June 1973 |
| 521 | Restricted use of IMP DDTA.M. McKenzie | Unknown | May 1973 |
| 522 | Traffic Statistics (May 1973)A.M. McKenzie | Unknown | June 1973 |
| 523 | SURVEY is in operation againA.K. Bhushan | Unknown | June 1973 |
| 524 | Proposed Mail ProtocolJ.E. White | Unknown | June 1973 |
| 525 | MIT-MATHLAB meets UCSB-OLS -an example of resource sharingW. Parrish, J.R. Pickens | Unknown | June 1973 |
| 526 | Technical meeting: Digital image processing software systemsW.K. Pratt | Unknown | June 1973 |
| 527 | ARPAWOCKYR. Merryman | Unknown | May 1973 |
| 528 | Software checksumming in the IMP and network reliabilityJ.M. McQuillan | Unknown | June 1973 |
| 529 | Note on protocol synch sequencesA.M. McKenzie, R. Thomas, R.S. Tomlinson, K.T. Pogran | Unknown | June 1973 |
| 530 | Report on the Survey ProjectA.K. Bhushan | Unknown | June 1973 |
| 531 | Feast or famine? A response to two recent RFC's about network informationM.A. Padlipsky | Unknown | June 1973 |
| 532 | UCSD-CC Server-FTP facilityR.G. Merryman | Unknown | July 1973 |
| 533 | Message-ID numbersD.C. Walden | Unknown | July 1973 |
| 534 | Lost message detectionD.C. Walden | Unknown | July 1973 |
| 535 | Comments on File Access ProtocolR. Thomas | Unknown | July 1973 |
| 537 | Announcement of NGG meeting July 16-17S. Bunch | Unknown | June 1973 |
| 538 | Traffic statistics (June 1973)A.M. McKenzie | Unknown | July 1973 |
| 539 | Thoughts on the mail protocol proposed in RFC 524D. Crocker, J. Postel | Unknown | July 1973 |
| 542 | File Transfer ProtocolN. Neigus · obsoleted by RFC 765 | Unknown | August 1973 |
| 543 | Network journal submission and deliveryN.D. Meyer | Unknown | July 1973 |
| 544 | Locating on-line documentation at SRI-ARCN.D. Meyer, K. Kelley | Unknown | July 1973 |
| 545 | Of what quality be the UCSB resources evaluators?J.R. Pickens | Unknown | July 1973 |
| 546 | Tenex load averages for July 1973R. Thomas | Unknown | August 1973 |
| 547 | Change to the Very Distant Host specificationD.C. Walden | Unknown | August 1973 |
| 548 | Hosts using the IMP Going Down messageD.C. Walden | Unknown | August 1973 |
| 549 | Minutes of Network Graphics Group meeting, 15-17 July 1973J.C. Michener | Unknown | July 1973 |
| 550 | NIC NCP experimentL.P. Deutsch | Unknown | August 1973 |
| 551 | NYU, ANL, and LBL Joining the NetY. Feinroth, R. Fink | Unknown | August 1973 |
| 552 | Single access to standard protocolsA.D. Owen | Unknown | July 1973 |
| 553 | Draft design for a text/graphics protocolC.H. Irby, K. Victor | Unknown | July 1973 |
| 555 | Responses to critiques of the proposed mail protocolJ.E. White | Unknown | July 1973 |
| 556 | Traffic Statistics (July 1973)A.M. McKenzie | Unknown | August 1973 |
| 557 | REVELATIONS IN NETWORK HOST MEASUREMENTSB.D. Wessler | Unknown | August 1973 |
| 559 | Comments on The New Telnet Protocol and its ImplementationA.K. Bushan | Unknown | August 1973 |
| 560 | Remote Controlled Transmission and Echoing Telnet optionD. Crocker, J. Postel | Unknown | August 1973 |
| 561 | Standardizing Network Mail HeadersA.K. Bhushan, K.T. Pogran, R.S. Tomlinson, J.E. White | Unknown | September 1973 |
| 562 | Modifications to the TELNET SpecificationA.M. McKenzie | Unknown | August 1973 |
| 563 | Comments on the RCTE Telnet optionJ. Davidson | Unknown | August 1973 |
| 565 | Storing network survey data at the datacomputerD. Cantor | Unknown | August 1973 |
| 566 | Traffic statistics (August 1973)A.M. McKenzie | Unknown | September 1973 |
| 567 | Cross Country Network BandwidthL.P. Deutsch | Unknown | September 1973 |
| 568 | Response to RFC 567 - cross country network bandwidthJ.M. McQuillan | Unknown | September 1973 |
| 569 | NETED: A Common Editor for the ARPA NetworkM.A. Padlipsky | Historic | October 1973 |
| 570 | Experimental input mapping between NVT ASCII and UCSB On Line SystemJ.R. Pickens | Unknown | October 1973 |
| 571 | TENEX FTP PROBLEMR. Braden | Unknown | November 1973 |
| 573 | DATA AND FILE TRANSFER - SOME MEASUREMENT RESULTSA. Bhushan | Unknown | September 1973 |
| 574 | Announcement of a Mail Facility at UCSBM. Krilanovich | Unknown | September 1973 |
| 576 | Proposal for modifying linkingK. Victor | Unknown | September 1973 |
| 577 | Mail priorityD. Crocker | Unknown | October 1973 |
| 578 | Using MIT-Mathlab MACSYMA from MIT-DMS MuddleA.K. Bhushan, N.D. Ryan | Unknown | October 1973 |
| 579 | Traffic statistics (September 1973)A.M. McKenzie | Unknown | November 1973 |
| 580 | Note to Protocol Designers and ImplementersJ. Postel | Unknown | October 1973 |
| 581 | Corrections to RFC 560: Remote Controlled Transmission and Echoing Telnet OptionD. Crocker, J. Postel | Unknown | November 1973 |
| 582 | Comments on RFC 580: Machine readable protocolsR. Clements | Unknown | November 1973 |
| 584 | Charter for ARPANET Users Interest Working GroupJ. Iseli, D. Crocker, N. Neigus | Unknown | November 1973 |
| 585 | ARPANET users interest working group meetingD. Crocker, N. Neigus, E.J. Feinler, J. Iseli | Unknown | November 1973 |
| 586 | Traffic statistics (October 1973)A.M. McKenzie | Unknown | November 1973 |
| 587 | Announcing New Telnet OptionsJ. Postel | Unknown | November 1973 |
| 588 | London Node Is Now UpA. Stokes | Unknown | October 1973 |
| 589 | CCN NETRJS server messages to remote userR.T. Braden | Unknown | November 1973 |
| 590 | MULTICS address changeM.A. Padlipsky | Unknown | November 1973 |
| 591 | Addition to the Very Distant Host specificationsD.C. Walden | Unknown | November 1973 |
| 592 | Some thoughts on system design to facilitate resource sharingR.W. Watson | Unknown | November 1973 |
| 593 | Telnet and FTP implementation schedule changeA.M. McKenzie, J. Postel | Unknown | November 1973 |
| 594 | Speedup of Host-IMP interfaceJ.D. Burchfiel | Unknown | December 1973 |