On Fri, Jun 05, 2026 at 10:31:10AM -0700, Randolf Richardson, Postmaster via 
mailop wrote:
> > 64.62.197.0/24 shadowserver.org
> 
>       We don't currently block anything from this netblock.


NB: shadowserver is a white hat network scanner that freely offers up its'
results to an ASN that wants to subscribe to their ASN's reports.

I think they do good work, and can alert you to unexpected anomalies that pop up
in your network that you should investigate.

There's plenty of shadow network scanners working for the hackers.

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