For anyone wondering how to do this (like me from a month or two back). Here's a useful tool/site: https://bgp.tools https://bgp.tools You can feed it an ip

For anyone wondering how to do this (like me from a month or two back). Here's a useful tool/site: https://bgp.tools https://bgp.tools You can feed it an ip address to get an AS ("Autonomous System"), then ask it for all prefixes associated with that AS. I fed it that first ip address from that list (43.131.0.0) and it showed my the same Tencent owned AS132203, and it gives back all the prefixes they have here: https://bgp.tools/as/132203#prefixes https://bgp.tools/as/132203#prefixes (Looks like roguebloodrage might have missed at least the 1.12.x.x and 1.201.x.x prefixes?) I started searching about how to do that after reading a RachelByTheBay post where she wrote: Enough bad behavior from a host -> filter the host. Enough bad hosts in a netblock -> filter the netblock. Enough bad netblocks in an AS -> filter the AS. Think of it as an "AS death penalty", if you like. (from the last part of https://rachelbythebay.com/w/2025/06/29/feedback/ https://rachelbythebay.com/w/2025/06/29/feedback/ )