Hello, I've been following this thread, and I find it quite interesting.
I’m curious if there is an official definition for "noisy prefix" (or perhaps "noisy AS").
Thank you, On 9/2/25 1:01 AM, Romain Fontugne via NANOG wrote:
Hi, We are seeing in RIS data a constant flow of update messages from a few ASes, here is the list of the top prefixes: ┌─────────────────────┬────────────┬──────────────┐ │ prefix │ origin_asn │ num_announce │ │ varchar │ varchar │ int64 │ ├─────────────────────┼────────────┼──────────────┤ │ 169.145.140.0/23 │ 6979 │ 843376 │ │ 2a03:eec0:3212::/48 │ 22616 │ 435608 │ │ 172.224.198.0/24 │ 36183 │ 380117 │ │ 172.226.208.0/24 │ 36183 │ 374040 │ │ 172.226.148.0/24 │ 36183 │ 367083 │ │ 104.206.88.0/22 │ 62904 │ 316325 │ │ 2806:202::/32 │ 28458 │ 313775 │ │ 2a03:74c0::/32 │ 203304 │ 275372 │ │ 2a02:26f7:eccc::/48 │ 36183 │ 238053 │ │ 2a02:26f7:f90c::/48 │ 36183 │ 237923 │ │ 2a02:26f7:ec8c::/48 │ 36183 │ 237448 │ │ 2a02:26f7:ee0c::/48 │ 36183 │ 237287 │ │ 2a02:26f7:f00c::/48 │ 36183 │ 236646 │ │ 2a02:26f7:ec10::/48 │ 36183 │ 234305 │ │ 2a02:26f7:c44c::/48 │ 36183 │ 234204 │ │ 2a02:26f7:d650::/48 │ 36183 │ 233471 │ │ 2a02:26f7:d258::/48 │ 36183 │ 233192 │ │ 2a02:26f7:c54c::/48 │ 36183 │ 232795 │ │ 2a02:26f7:e08c::/48 │ 36183 │ 232303 │ You can also see live data here: https://www.ihr.live/en/bgp-monitor?prefix=169.145.140.0/23&maxHops=6&rrc=rrc25.ripe.net For the first prefix this has been going on since at least last June. Anyone knows what's happening? Thanks, Romain Fontugne
