Re: ARIN Waiting List Recipients Begin Receiving Allocated IPs from 131.143.0.0/16

[Ezri Zhu via NANOG <nanog () lists nanog org>]

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!

-- 
ezri
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