AS dashboard: AS 16735

The table shows every prefix that originated from the target AS in the last week. The table can be sorted on any column by clicking on the headers. The size is provided as a separate column to ease sorting.

As the current instance of the RIS database started around April 2009, any prefix with a first seen time before 2009-04-01 may be a lot older than 2009. However, the current RIS database can not see that.

Note that this also means that only prefixes seen after April 2009 are included in the graph.

The registry listed is based on IANA's IPv4 Address Space document.

The prefix table changes background color for IANA reserved and RFC1918 space, and unusually large or small prefixes. An IPv4 prefix is unusually small when smaller than a /24 and unusually large when bigger than a /7. An IPv6 prefix is unusually small when smaller than /48 and unusually large when larger than /10.

The number of peers is the number of RIS peers sending this prefix now. This can be used as an indication for the spread of the prefix. Explanation

This list and diagram show the 'transits' seen for the target AS. Whether or not these actually have a business relation to the target AS can not be determined from routing data. Therefore, the software simply looks at all peerings seen for this AS in the last three months and counts all ASes to the left of the target AS.

The software ignores any peerings seen from a direct RIS peer. So if RIS would see '123 456 789', the 123-456 peering would not be counted, the 456-789 peering would. Therefore, all ASes listed here are peers that pass the routes sent by the target AS (not necessarily originating from the target AS) on to at least some other ASes.

Any AS with more than 5% is included in the piechart, any AS with more than 1% is included in the list. ASes seen in only a few percent of the AS paths are most likely not real transits.

The ratio between the different 'transits' is based on the number of routes. All AS paths with 25152 as origin are evaluated for this. Therefore, this is not related to the amount of traffic and changes in the RIS peerings may cause changes in the ratios. Explanation

The diagram shows the average length of all AS paths seen in the last week originating from the target AS. A second diagram can be shown where prepending is stripped from AS paths before calculating.

Note that this is not necessarily related to geographical distance - if the collector in Japan (DIX-IE) would have only one peer and that would happen to be a transit of the target AS, the average distance for DIX-IE would be shown as two (originating AS and its transit).

The absolute minimal distance is one, but most paths will be two ASes at least (without prepending).

When comparing plots, you may sometimes see that although the AS path gets longer, the line get shorter. This is because the line length is calculated on a ratio between the AS paths, not the absolute numbers. Explanation