News for hackers. Stuff that matters.

A comment on Tell HN: Amazon now owns 3.0.0.0/8. Parent comment

Re:Tell HN: Amazon now owns 3.0.0.0/8 by parliament32 on Thursday November 08, 2018 @12:50PM (#18408182)
There's no reason why you can't assign 3.0.0.0 to a host, it'll work fine. Just make sure you don't put anything else there by convention.

3.255.255.255 would be the default broadcast address, but not only can you use a different address (in fact, any address you want for broadcast, you just need to configure it), but this is also not a real /8... it's 3.0.0.0/15 according to ARIN.

https://whois.arin.net/rest/net/NET-3-0-0-0-2/pft?s=3.0.0.0

3.255.255.255 is default broadcast for 3.128.0.0/9.

[ Parent | on HN ]
Re:Tell HN: Amazon now owns 3.0.0.0/8 by icedchai on Thursday November 08, 2018 @01:42PM (#18408714)
They delegated 3.0.0.0/15 to Singapore, out of the AWS 3.0.0.0/9 block, which is adjacent to their 3.128.0.0/9 block... which gives them all of 3.0.0.0/8...

Broadcast addresses have no meaning outside of a broadcast domain / subnet. Nobody would use a full /9 as a subnet. It would be split into much smaller blocks...

[ Parent | on HN ]