On Wed, Dec 17, 2025 at 11:08 AM Christopher Morrow <[email protected]> wrote: > On Wed, Dec 17, 2025 at 12:06 AM William Herrin via NANOG > <[email protected]> wrote: > I don't think, really, there was ever any REAL hope that 100.64 was
> > If you know it's 4.10 space (not address space allocated under a > > different policy section) and you know they're using it for plain IPv4 > > or generic dual stack, please file a report at > > https://account.arin.net/public/fraud > > Is it abuse/fraud if the LIR is treating this as RFC1918 / private space? Hi Chris, Did I miss the part where we pivoted to talking about RFC 6598 space? I thought we were talking about ARIN NRPM 4.10 space. An ISP can employ 100.64.0.0/10 (RFC 6598 space) any way they choose. ARIN is not a party to that process. It's usually not a good idea to use 100.64.0.0/10 for anything other than numbering downstream customers in conjunction with CGNAT, but that's an operational choice for the ISP. Regards, Bill Herrin -- For hire. https://bill.herrin.us/resume/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/GTAR4AOYC4XAM3JMNPNFGKCT7RKY5X6A/
