At 2025-11-10 17:40:57 UTC Cloudflare for some unknown reason withdrew 2400:cb00:2049::/48, A prefix that contains a lot of DNS name servers for many customers (including bgp.tools) (see https://bgp.tools/prefix/2400:cb00:2049::/48#dns ) Everything was back by 2025-11-10 18:00:30, but it's kinda wild that a prefix that contains .gov and loads of other name servers on it would just disappear like that. This graph shows a selection of bgp.tools's session visibility second-by-second during the incident.
one honk maybe more
benjojo
replied 10 Nov 2025 19:24 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/7XtQ6k2vjx31G1w4n1
In theory I could have done the full view over all 3000 sessions, but that would have taken a lot of CPU time on my machine that probably have better things to be doing :)
benjojo
replied 10 Nov 2025 19:26 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/k7WfV2Xf34jc3gHWCs
Ah! Cloudflare did put a status page up for it ( https://www.cloudflarestatus.com/incidents/x90btpk9bmr7 ) , but I failed to find it because the status page for cloudflare these days is basically incomprehensible with so many different scheduled maintenances on it
vaelen@tech.lgbt
replied 10 Nov 2025 19:30 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/7sM5W86j5m8zR2qF8y