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Welcome to the IETF

Register for IETF 116 today

Join leading technologists from around the world in Yokohama and online from 25-31 March 2023 for an IETF Hackathon and more than 100 technical sessions.

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Upcoming events

  • Yokohama

    IETF 116 Yokohama 

    IETF 116 starts Saturday 25 March and runs through Friday afternoon, 31 March.

    Yokohama, Japan
  • San Francisco panorama

    IETF 117 San Francisco 

    IETF 117 starts Saturday 22 July and runs through Friday afternoon, 28 July.

    San Francisco
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What's new?

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Search the IETF email archive

Much of the daily work of the IETF is conducted on electronic mailing lists. A new mail archive tool realizing the requirements developed in RFC 6778 is now in use:

Search IETF Datatracker

The IETF Datatracker contains data about IETF documents, working groups, meetings, agendas, minutes, presentations, and more:


Understanding the Internet Engineering Task Force

Working Groups

Working Groups are the primary mechanism for development of IETF specifications and guidelines. Working Groups are typically created to address a specific problem or to produce one or more specific deliverables (a guideline, standards specification, etc.).

Featured Working Group

Network Time Protocol

Accurate, precise, and reliable time is an important function relied upon by modern systems, devices, and applications. This requires reliable and accurate network time synchronization over modern IP…

NTP ntp@ietf.org

Request for Comments (RFCs)

The IETF publishes RFCs authored by network operators, engineers, and computer scientists to document methods, behaviors, research, or innovations applicable to the Internet.

Featured RFC

Network Time Protocol Version 4: Protocol and Algorithms Specification

The Network Time Protocol (NTP) is widely used to synchronize computer clocks in the Internet. This document describes NTP version 4 (NTPv4), which is backwards compatible with NTP version 3 (NTPv3)…

RFC 5905was: https://datatracker.ietf.org/doc/draft-ietf-ntp-ntpv4-proto/

Topics of interest

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Next IETF meeting

Stay tuned for the latest information on the next IETF meeting scheduled for 25-31 March 2023

Visit the IETF 116 meeting webpage