as-ip-blocks

Download IP block lists by ASN - network provider addresses, updated daily

Systems & Infrastructure Networking

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535GitHub stars

REPOSITORY AT A GLANCE

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What it is

Download IP block lists by ASN - network provider addresses, updated daily

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Where it is used

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

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Mentions over time

HN mentions by hour2 dated mentions

Observed mentions: 2025-12-22 14:37:00 UTC to 2025-12-22 15:54:56 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
Dec 22, 14:00	2025-12-22 14:00:00 UTC	2025-12-22 15:00:00 UTC	1	0	1
Dec 22, 15:00	2025-12-22 15:00:00 UTC	2025-12-22 16:00:00 UTC	1	0	1

What Hacker News says

2 sources

embedding-shape·Dec 22, 2025

> If anyone's interested in trying to implement something similar, there's a regularly updated database of ASN <-> IP ranges announced here: https://github.com/ipverse/asn-ip What exactly is the source of these mappings? Never heard about ipverse before, seems to be a semi-anonymous GitHub organization and their website has had a failing certificate for more than a year by now.

In How I protect my Forgejo instance from AI web crawlers

nucleardog·Dec 22, 2025

Yeah, this is where I landed a while ago. What problem am I _really_ trying to solve? For some people it's an ideological one--we don't want AI vacuuming up all of our content. For those, "is this an AI user?" is a useful question to answer. However it's a hard one. For many the problem is simply "there are a class of users that are putting way too much load on the system and it's causing problems". Initially I was playing wack-a-mole with this and dealing with alerts firing on a regular basis because of Meta crawling our site very aggressively, not backing off when errors were returned, etc. I looked at rate limiting but the work involved in distributed rate limiting versus the number of offenders involved made the effort look a little silly, so I moved towards a "nuke it from orbit" strategy: Requests are bucketed by class C subnet (31.

Read the rest

13.80.36 -> 31.13.80.x) and request rate is tracked over 30 minute windows. If the request rate over that window exceeds a very generous threshold I've only seen a few very obvious and poorly behaved crawlers exceed it fires an alert. The alert kicks off a flow where we look up the ASN covering every IP in that range, look up every range associated with those ASNs, and throw an alert in Slack with a big red "Block" button attached. When approved, the entire ASN is blocked at the edge. It's never triggered on anything we weren't willing to block (e.g., a local consumer ISP). We've dropped a handful of foreign providers, some "budget" VPS providers, some more reputable cloud providers, and Facebook. It didn't take long before the alerts stopped--both for high request rates and our application monitoring seeing excessive loads. If anyone's interested in trying to implement something similar, there's a regularly updated database of ASN <-> IP ranges announced here: https://github.com/ipverse/asn-ip

In How I protect my Forgejo instance from AI web crawlers