> > A route to 2400::/12 is effectively a route to North America - well, part > of it, because ARIN has more than one prefix.
2400::/12 is APNNIC, not ARIN. https://www.iana.org/assignments/ipv6-unicast-address-assignments/ipv6-unicast-address-assignments.xhtml On Sat, Aug 30, 2025 at 12:54 PM nanog--- via NANOG <[email protected]> wrote: > 2400::/12 is larger than any prefix allocated to a network. In fact it's a > prefix allocated to ARIN, which sub-allocates prefixes to various North > American networks. > > A route to 2400::/12 is effectively a route to North America - well, part > of it, because ARIN has more than one prefix. > > Network operators can announce whatever they want to their customers. It's > not uncommon for some customers to get summarized routes. Some ISP far away > from America could be telling its customers "yes, I know how to get to > North America". > > This radar tool seems to be showing what ISPs tell it, without filtering > such ISP-specific routes. You can see other "invalid" routes such as /128 > routes in the same tool. Such routes won't propagate across the whole > internet, by convention, but there's no rule that a single ISP can't use > them. > > > > On 30 August 2025 08:58:21 CEST, Pirawat WATANAPONGSE via NANOG < > [email protected]> wrote: > >Dear Gurus, > > > > > >Radar tool by Qrator [Reference: https://radar.qrator.net ] claims that > >Zenlayer Inc. [AS4229] is “umbrella-ing” me by announcing ‘2400::/12’ on > >top of my more-specific address block. > >The tool classifies it as a type of hijacking. > >[Disclaimer: apologies to Zenlayer if you didn’t do it; but that’s the > >information I received] > >My neighboring organization also has a more-specific block that falls > under > >The Umbrella too. > > > >However, other tools (https://stat.ripe.net , > https://irrexplorer.nlnog.net > >, https://bgp.he.net , etc.) seem unable to see that particular > >announcement. > > > >Questions: > >1. Is Qrator claim true? (because I have already tried but cannot verify) > >2. If so, should I be concerned? > >Even though I already ROA-ed *and* IRR-ed my own block, but if “the other > >end” doesn’t validate, it won’t do any good, correct? > >(Oh, yeah, the other end also has to somehow “not see” my longer-prefix. > >But that can happen as well, no?) > >3. In that case, what more do I must do? > > > >I would extremely appreciate someone helping me out on this matter. > > > > > >Best Regards, > > > >Pirawat. > >_______________________________________________ > >NANOG mailing list > > > https://lists.nanog.org/archives/list/[email protected]/message/GT2M54NGQQHRE7IU63ECEOMVTGH7FRIW/ > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/IGZBNRW343ULHYZWYMRPCJ7DV4HAS4AD/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/5YZNDRPBTZUESHSF6KXZOUV2QKYDQYI4/
