Am 30.08.2025 um 18:54:15 Uhr schrieb nanog--- via NANOG: > 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.
Isn't 2400::/16 used in the APNIC area? Various Asian countries use networks in that area. According to whois, 2400::/20 is allocated to South Korea. KRNIC is not an ISP but a National Internet Registry similar to APNIC. [ Network Information ] IPv6 Address : 2400:0000::/20 Organization Name : Korea Telecom Service Name : KORNET Address : Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90 Zip Code : 13606 Registration Date : 20050601 Name : IP Manager Phone : +82-2-500-6630 E-Mail : [email protected] - KISA/KRNIC WHOIS Service - > 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". Summarizing routes is different to that - not all prefixes from that net are announced. > 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. Do they use that to reduce the amount of routing table entries in routers that are far away from such networks? -- Gruß Marco Send unsolicited bulk mail to [email protected]
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