@misc{rfc9371,
    series =    {Request for Comments},
    number =    9371,
    howpublished =  {RFC 9371},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC9371},
    url =       {https://www.rfc-editor.org/info/rfc9371},
        author =    {Amanda Baber and Paul E. Hoffman},
    title =     {{Registration Procedures for Private Enterprise Numbers (PENs)}},
    pagetotal = 6,
    year =      2023,
    month =     mar,
    abstract =  {This document describes how Private Enterprise Numbers (PENs) are registered by IANA. It shows how to request a new PEN and how to modify a current PEN. It also gives a brief overview of PEN uses.},
}