RFC-400
- RFC 401 - Conversion of NGP-0 Coordinates to Device Specific Coordinates
- RFC 402 - ARPA Network Mailing Lists
- RFC 403 - Desirability of a Network 1108 Service
- RFC 404 - Host Address Changes Involving Rand and ISI
- RFC 405 - Correction to RFC 404
- RFC 406 - Scheduled IMP Software Releases
- RFC 407 - Remote Job Entry Protocol
- RFC 408 - NETBANK
- RFC 409 - Tenex interface to UCSB's Simple-Minded File System
- RFC 410 - Removal of the 30-Second Delay When Hosts Come Up
- RFC 411 - New MULTICS Network Software Features
- RFC 412 - User FTP Documentation
- RFC 413 - Traffic statistics (October 1972)
- RFC 414 - File Transfer Protocol (FTP) status and further comments
- RFC 415 - Tenex bandwidth
- RFC 416 - ARC System Will Be Unavailable for Use During Thanksgiving Week
- RFC 417 - Link usage violation
- RFC 419 - To: Network liaisons and station agents
- RFC 420 - CCA ICCC weather demo
- RFC 421 - Software Consulting Service for Network Users
- RFC 422 - Traffic statistics (November 1972)
- RFC 423 - UCLA Campus Computing Network Liaison Staff for ARPANET
- RFC 425 - "But my NCP costs $500 a day"
- RFC 426 - Reconnection Protocol
- RFC 429 - Character Generator Process
- RFC 430 - Comments on File Transfer Protocol
- RFC 431 - Update on SMFS Login and Logout
- RFC 432 - Network logical map
- RFC 433 - Socket number list
- RFC 434 - IMP/TIP memory retrofit schedule
- RFC 435 - Telnet issues
- RFC 436 - Announcement of RJS at UCSB
- RFC 437 - Data Reconfiguration Service at UCSB
- RFC 438 - FTP server-server interaction
- RFC 439 - PARRY encounters the DOCTOR
- RFC 440 - Scheduled network software maintenance
- RFC 441 - Inter-Entity Communication - an experiment
- RFC 442 - Current flow-control scheme for IMPSYS
- RFC 443 - Traffic statistics (December 1972)
- RFC 445 - IMP/TIP preventive maintenance schedule
- RFC 446 - Proposal to consider a network program resource notebook
- RFC 447 - IMP/TIP memory retrofit schedule
- RFC 448 - Print files in FTP
- RFC 449 - Current flow-control scheme for IMPSYS
- RFC 450 - MULTICS sampling timeout change
- RFC 451 - Tentative proposal for a Unified User Level Protocol
- RFC 452 - TELNET Command at Host LL
- RFC 453 - Meeting announcement to discuss a network mail system
- RFC 454 - File Transfer Protocol - meeting announcement and a new proposed document
- RFC 455 - Traffic statistics (January 1973)
- RFC 456 - Memorandum: Date change of mail meeting
- RFC 457 - TIPUG
- RFC 458 - Mail retrieval via FTP
- RFC 459 - Network questionnaires
- RFC 460 - NCP survey
- RFC 461 - Telnet Protocol meeting announcement
- RFC 462 - Responding to user needs
- RFC 463 - FTP comments and response to RFC 430
- RFC 464 - Resource notebook framework
- RFC 466 - Telnet logger/server for host LL-67
- RFC 467 - Proposed change to Host-Host Protocol: Resynchronization of connection status
- RFC 468 - FTP data compression
- RFC 469 - Network mail meeting summary
- RFC 470 - Change in socket for TIP news facility
- RFC 471 - Workshop on multi-site executive programs
- RFC 472 - Illinois' reply to Maxwell's request for graphics information (NIC 14925)
- RFC 473 - MIX and MIXAL?
- RFC 474 - Announcement of NGWG meeting: Call for papers
- RFC 475 - FTP and Network Mail System
- RFC 476 - IMP/TIP memory retrofit schedule (rev 2)
- RFC 477 - Remote Job Service at UCSB
- RFC 478 - FTP server-server interaction - II
- RFC 479 - Use of FTP by the NIC Journal
- RFC 480 - Host-dependent FTP parameters
- RFC 482 - Traffic statistics (February 1973)
- RFC 483 - Cancellation of the resource notebook framework meeting
- RFC 485 - MIX and MIXAL at UCSB
- RFC 486 - Data transfer revisited
- RFC 487 - Free file transfer
- RFC 488 - NLS classes at network sites
- RFC 489 - Comment on resynchronization of connection status proposal
- RFC 490 - Surrogate RJS for UCLA-CCN
- RFC 491 - What is "Free"?
- RFC 492 - Response to RFC 467
- RFC 493 - GRAPHICS PROTOCOL
- RFC 494 - Availability of MIX and MIXAL in the Network
- RFC 495 - Telnet Protocol specifications
- RFC 496 - TNLS quick reference card is available
- RFC 497 - Traffic Statistics (March 1973)
- RFC 498 - On mail service to CCN
- RFC 499 - Harvard's network RJE
- RFC 500 - Integration of data management systems on a computer network