Show HN: IP Guide – info on IP addresses, Networks, and ASNs

Re:Show HN: IP Guide – info on IP addresses, Networks, and ASNs by baby_souffle on Friday November 24, 2023 @09:46PM (#38410694)

> I dig that idea, I'll have to think of the best way to pull that data while keeping the app stateless and fast.

Reverse DNS lookups are usually pretty quick:

```shell

  > time dig +short -x 2600:dead::beef
  customer.my-isp.net.
  dig +short -x 2600:dead::beef  0.00s user 0.01s system 1% cpu 0.882 total

```

[ Parent | on HN ]

Re:Show HN: IP Guide – info on IP addresses, Networks, and ASNs by teh_klev on Friday November 24, 2023 @10:06PM (#38410794)

This might be useful to review:

https://news.ycombinator.com/formatdoc

"Text after a blank line that is indented by two or more spaces is reproduced verbatim. (This is intended for code.)"

[ Parent | on HN ]

Re:Show HN: IP Guide – info on IP addresses, Networks, and ASNs by baby_souffle on Friday November 24, 2023 @11:24PM (#38411163)

Thanks.

I spend all day writing markdown and fenced blocks with type-hint is muscle memory at this point

[ Parent | on HN ]

Re:Show HN: IP Guide – info on IP addresses, Networks, and ASNs by spacehunt on Friday November 24, 2023 @11:31PM (#38411195)

Reverse DNS does not give you all the hostnames that can point to a particular IP address though.

[ Parent | on HN ]

Re:Show HN: IP Guide – info on IP addresses, Networks, and ASNs by necovek on Saturday November 25, 2023 @01:36AM (#38411716)

Other than brute forcing, I don't think anything does — that's the beauty and the curse of a proper federated system :)

[ Parent | on HN ]

Re:Show HN: IP Guide – info on IP addresses, Networks, and ASNs by jedberg on Saturday November 25, 2023 @02:18AM (#38411875)

In fact, it might not even give you any names that point to an IP address, since it might be out of sync with the forward system, especially if the records are built by hand.

[ Parent | on HN ]