most recent ARIN issued report
[arin-issued] Daily Report for 2025-10-07
Add 131.143.16.0-131.143.19.255
through
Add 131.143.235.0-131.143.235.255
131.143.0.0/16 was issued to Rockwell so its easy to see that there
could be blocks that existed globally.
Trey
On 10/8/25 1:04 PM, Ezri Zhu via NANOG wrote:
zgx,
On Wed Oct 8, 2025 at 9:39 AM EDT, Zhang Gaoxing via NANOG wrote:
I have noticed that the number of people on the ARIN Waiting List has been
decreasing significantly recently, and some have started receiving IP
allocations from the 131.143.0.0/16 range. I also found that these IPs were
previously geolocated in Switzerland. Were these addresses reclaimed from
an organisation? I’m curious about the origin of these IPs.
Have you checked out
https://stat.ripe.net/resource/131.143.0.0-131.143.207.255#tab=database
yet? it has some nice graphs showing all the historical
announcements from that range. Sadly the page takes forever to
load due to the size.
However, I failed to find the 131.143.0.0/16 range from the ARIN
"Cleared for Waiting List" CSV, may I ask how you found that
range?
btw, i'd recommend signing up for
https://www.arin.net/reference/research/whowas/ as that's
probably your best bet.
let us know how it goes!
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