Talk:IP address


Additional Reserved IPv4 Subnets Per RFC5737

Latest comment: 2 years ago1 comment1 person in discussion

The IP Address page is protected (and my English is not good enough for editing such a page) so I just like to note that there are 3 more IP addresses subnets that are reserved: https://datatracker.ietf.org/doc/rfc5737/

The blocks 192.0.2.0/24 (TEST-NET-1), 198.51.100.0/24 (TEST-NET-2), and 203.0.113.0/24 (TEST-NET-3) are provided for use in documentation and I think that this should be noted in a separate paragraph. 2A06:C701:4C05:C200:47E2:4FB4:F37A:C580 (talk) 21:35, 26 April 2024 (UTC)Reply

Does 127.0.0.0/8 count as part of class A?

Latest comment: 1 year ago2 comments2 people in discussion

https://www.icann.org/en/system/files/files/inet-tutorial-ajm-18jun02-en.pdf (page 15) implies that it doesn't count as part of class A, and I find it hard to believe that a mistake would stay on ICANN's website for 20 years

If it does count as part of class A, a citation should definitely be added Person568 (talk) 03:17, 14 March 2025 (UTC)Reply

The definition of class A is that the first bit (MSB) is zero (RFC790 page 2). Class B has first two bits 10, class C is 110. Looking at those bits is how computers work out the class. 127.x.x.x has a special purpose but it is class A. Your link shows some slides for a tutorial talk. A tutorial might omit 127 because they don't want to give the impression that it is available for a private network. Johnuniq (talk) 03:46, 14 March 2025 (UTC)Reply

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.