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De-Bogonising New Address Blocks Report - 20090210

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Summary

IPv4

Anchor Prefix: 84.205.83.0/24      
Size of set: 95 ASes

Visibility estimation	93 (+- 0) out of 95 ASes (97 %)
Filtering ASes (2)	6730 16150
Uncertain ASes (part of a filtering as-path segment)	0

Visibility estimation	93 (+- 0) out of 95 ASes (97 %)
Filtering ASes (2)	6730 16150
Uncertain ASes (part of a filtering as-path segment)	0

Visibility estimation	94 (+- 0) out of 95 ASes (98 %)
Filtering ASes (1)	16150
Uncertain ASes (part of a filtering as-path segment)	0

Visibility estimation	89 (+- 0) out of 95 ASes (93 %)
Filtering ASes (5)	5413 6730 12859 16150 20771
Uncertain ASes (part of a filtering as-path segment)	1
Filtering segments (at least one filtering AS):	[ 6730 5413 ] [ 12859 16150 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	75 (+- 4) out of 95 ASes (78 %)
Filtering ASes (15)	1853 2857 3356 5413 7018 9304 12350 12859 13030 16150 20483 20771 20932 21202 29222
Uncertain ASes (part of a filtering as-path segment)	9
Filtering segments (at least one filtering AS):	[ 3.5 1125 ] [ 1853 3356 5413 ] [ 1930 20965 ] [ 3356 5413 ] [ 6695 12859 ] [ 12350 12859 ] [ 12859 16150 ] [ 13030 16150 ] [ 16186 16150 ] [ 20932 16150 ] [ 25091 20932 ] [ 25091 20932 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	75 (+- 4) out of 95 ASes (78 %)
Filtering ASes (15)	1853 2857 3356 5413 7018 9304 12350 12859 13030 16150 20483 20771 20932 21202 29222
Uncertain ASes (part of a filtering as-path segment)	9
Filtering segments (at least one filtering AS):	[ 3.5 1125 ] [ 1853 3356 5413 ] [ 1930 20965 ] [ 3356 5413 ] [ 6695 12859 ] [ 12350 12859 ] [ 12859 16150 ] [ 13030 16150 ] [ 16186 16150 ] [ 20932 16150 ] [ 25091 20932 ] [ 25091 20932 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	73 (+- 4) out of 95 ASes (76 %)
Filtering ASes (17)	1853 2857 3257 3356 5413 7018 8331 9304 12350 12859 13030 16150 20483 20771 20932 21202 29222
Uncertain ASes (part of a filtering as-path segment)	9
Filtering segments (at least one filtering AS):	[ 3.5 1125 ] [ 1853 3356 5413 ] [ 1930 20965 ] [ 3356 5413 ] [ 6695 12859 ] [ 12350 12859 ] [ 12859 16150 ] [ 13030 16150 ] [ 16186 16150 ] [ 20932 16150 ] [ 25091 20932 ] [ 25091 20932 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	87 (+- 1) out of 95 ASes (91 %)
Filtering ASes (7)	5413 8331 12859 16150 20483 20771 29222
Uncertain ASes (part of a filtering as-path segment)	2
Filtering segments (at least one filtering AS):	[ 12859 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	88 (+- 1) out of 95 ASes (92 %)
Filtering ASes (6)	5413 12859 16150 20483 20771 29222
Uncertain ASes (part of a filtering as-path segment)	2
Filtering segments (at least one filtering AS):	[ 12859 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	88 (+- 1) out of 95 ASes (92 %)
Filtering ASes (6)	5413 12859 16150 20483 20771 29222
Uncertain ASes (part of a filtering as-path segment)	2
Filtering segments (at least one filtering AS):	[ 12859 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	87 (+- 1) out of 95 ASes (91 %)
Filtering ASes (7)	5413 8331 12859 16150 20483 20771 29222
Uncertain ASes (part of a filtering as-path segment)	2
Filtering segments (at least one filtering AS):	[ 12859 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	88 (+- 1) out of 95 ASes (92 %)
Filtering ASes (6)	5413 12859 16150 20483 20771 29222
Uncertain ASes (part of a filtering as-path segment)	2
Filtering segments (at least one filtering AS):	[ 12859 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	88 (+- 1) out of 95 ASes (92 %)
Filtering ASes (6)	5413 12859 16150 20483 20771 29222
Uncertain ASes (part of a filtering as-path segment)	2
Filtering segments (at least one filtering AS):	[ 12859 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ]

Visibility estimation	73 (+- 6) out of 95 ASes (76 %)
Filtering ASes (16)	2857 5413 7018 8419 9304 12350 12859 13030 16150 20483 20771 20932 21202 29222 29636 39202
Uncertain ASes (part of a filtering as-path segment)	12
Filtering segments (at least one filtering AS):	[ 3.5 1125 1103 ] [ 1930 20965 ] [ 6067 12859 ] [ 6067 5413 ] [ 6695 12859 ] [ 8419 12859 ] [ 8468 5413 ] [ 12350 12859 ] [ 12859 16150 ] [ 13030 16150 ] [ 16186 16150 ] [ 20932 16150 ] [ 25091 20932 ] [ 25091 20932 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ] [ 39202 12859 ]

Visibility estimation	73 (+- 6) out of 95 ASes (76 %)
Filtering ASes (16)	2857 5413 7018 8419 9304 12350 12859 13030 16150 20483 20771 20932 21202 29222 29636 39202
Uncertain ASes (part of a filtering as-path segment)	12
Filtering segments (at least one filtering AS):	[ 3.5 1125 1103 ] [ 1930 20965 ] [ 6067 12859 ] [ 6067 5413 ] [ 6695 12859 ] [ 8419 12859 ] [ 8468 5413 ] [ 12350 12859 ] [ 12859 16150 ] [ 13030 16150 ] [ 16186 16150 ] [ 20932 16150 ] [ 25091 20932 ] [ 25091 20932 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ] [ 39202 12859 ]

Visibility estimation	71 (+- 6) out of 95 ASes (74 %)
Filtering ASes (18)	2857 3257 5413 7018 8331 8419 9304 12350 12859 13030 16150 20483 20771 20932 21202 29222 29636 39202
Uncertain ASes (part of a filtering as-path segment)	12
Filtering segments (at least one filtering AS):	[ 3.5 1125 1103 ] [ 1930 20965 ] [ 6067 12859 ] [ 6067 5413 ] [ 6695 12859 ] [ 8419 12859 ] [ 8468 5413 ] [ 12350 12859 ] [ 12859 16150 ] [ 13030 16150 ] [ 16186 16150 ] [ 20932 16150 ] [ 25091 20932 ] [ 25091 20932 16150 ] [ 29222 6830 ] [ 29222 6830 5413 ] [ 30844 12859 ] [ 30844 5413 ] [ 39202 12859 ]

Details

IPv4 AS Number 41.223.236.0 /22 186.128.0.0 /16 186.127.248.0 /21 197.255.252.0 /22 109.0.0.0 /16 109.1.0.0 /21 109.1.24.0 /24 110.0.0.0 /24 110.50.0.0 /22 110.255.0.0 /16 111.0.0.0 /24 111.50.0.0 /22 111.255.0.0 /16 178.0.0.0 /16 178.1.0.0 /21 178.1.24.0 /24 3.5 174 286 513 1103 1125 1221 1239 1280 1299 1853 1930 2497 2857 2895 2914 3257 3269 3333 3356 3549 4589 4608 4637 4777 5413 6067 6453 6461 6667 6695 6730 6762 6830 6881 6939 7018 8331 8359 8402 8419 8447 8468 8596 8763 8881 8928 9002 9304 12350 12637 12779 12859 12956 12989 13030 13237 14361 16150 16186 16735 17379 19089 19151 20483 20562 20640 20771 20932 20965 21202 22691 25091 25560 27664 28917 29208 29222 29449 29636 30844 30890 31323 34102 34347 34695 35054 39202 39792 39821 39912 41853 41877 41965 42109

Methodology

The anchor and debogon prefixes are announced by the same router (RRC3) and AS number (AS12654). The AS-path from any point on the Internet towards the announcing router should therefore be the same for both prefixes. If this is not the case, it is assumed that debogon prefix filtering is being applied somewhere on the path.

The collection points of the AS-paths used in this report are all the RIS RRCs. Therefore, ASes covered in this report are only those seen in the AS-paths between the collection points and the anchor prefix.

To perform this report, all the AS-paths towards the anchor and the debogon prefixes are compared:

• ASes appearing on matching anchor and debogon paths are labelled non-filtering.
• From the unmatching AS-paths, all ASes labeled as non-filtering are removed, generating a list of AS-path segments.
• If a segment consists of only one AS, the AS is labelled filtering.
• All remaining ASes are labelled uncertain.

If an AS is labelled uncertain, it means that it is part of an AS-path segment in which at least one AS is considered to be filtering, but it is unconclusive which one(s).

The visibility plots show the percentage of how many ASes are estimated to be non-filtering. The grey area represents the indeterminacy caused by the ASes considered uncertain.