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Hijack information for IPv4

Hijack information for IPv6

Route hijacks are estimated based on RPKI validation data. If an announcement is identified as invalid, it is considered a potential route hijack. There are two possible reasons for this: the origin autonomous system is not authorized to announce the route, or the announced prefix is ​​too specific (the maximum length is exceeded). But what about the announcements that are not covered by RPKI? For these cases, we use information from the Internet Route Registries ( IRR ) to validate whether the announcements are recorded. If there is a record in the IRR that matches the announcement (same origin ASN and same prefix length), then it is labeled as IRR-valid. If there are records but these records contradict this information, then it is considered as IRR-invalid. If the prefix is not registered in an IRR, it is considered as IRR-not found. In such cases, potential route hijacks are not considered, but they are reported as anomalies.

The unit used to perform the calculations is the Prefix/Origin AS pair.