Hi Jeroen, For me it is not very surprising that *recently* deregistered ASNs still appear in places. Some work in progress, sorry for the not-so-usable stuff, this is a quick lookup for RIPE NCC reserved ASNs that are visible in the GRT. There are more interesting searchable things there for the curious ;) https://bgpthingy.xindi.eu/search?q=tags%3A+ripencc%2C+rir_status_reserved%2... However, this looks a bit out of scope for the thread and maybe could be moved to a separate one, please see my reply inline below. Also, among these are some good examples of short lived assignments that were perhaps, to say it mildly, not needed. Those just add on the Registration Services workload both for registering and deregistering them with all the bureaucratic steps. On 28/07/2026 02:59, Jeroen Massar via routing-wg wrote:
TLDR: 212032 is reserved but in BGP...
was deregistered on 2026-06-29
More reserved/unallocated ASNs currently announcing things:
Seems AS214026 is a quite common occurrence, but I understand it was recently revoke or something like that. Would be good for transits to be informed of that at least...
was also deregistered on 2026-06-29, registered on 2025-10-13, fun fact it had a proton.me email as contact.
185.250.112.0/24 AS210182 185.250.113.0/24 AS210182 185.250.114.0/24 AS210182 185.250.115.0/24 AS210182
deregistered on 2026-06-24 (looks like LIR closure)
185.177.176.0/24 AS206741 185.177.179.0/24 AS206741
also deregistered on 2026-06-24, likely LIR closure
45.88.203.0/24 AS42651
deregistered on 2026-06-16, out of region
104.234.16.0/24 AS47813
another one deregistered on 2026-06-29, out of region
109.175.133.0/24 AS208279
another one from 2026-06-24 (LIR closure day apparently), was registered on 2025-05-16
117.121.245.0/24 AS49901
this one was deregistered on 2025-03-04, interesting
149.18.96.0/24 AS200113
deregistered on 2026-05-04 (registered on 2023-01-27)
188.72.100.0/24 AS208295 188.72.99.0/24 AS208295
deregistered on 2026-06-25 (likely LIR closure)
2401:f6a0:2000::/36 AS212032
see above, the first one. 2026-06-29
2a0f:7803:fae0::/48 AS215269 2a12:bec4:1444::/48 AS215269
mistery on this, I am too lazy to look it up
2a13:2380:11::/48 AS213205 2a13:2380:359::/48 AS213205 2a13:2380::/29 AS213205
deregistered on 2026-05-12 (likely LIR closure), out of region, registered on 2022-08-17