De-Bogonising New Address Blocks Report for APNIC

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De-Bogonising New Address Blocks Report for APNIC - 20060627

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Summary

All ASes
121.50.0.0/21	is seen by 62 out of 84 ASes	(73 %)
121.100.0.0/20	is seen by 62 out of 84 ASes	(73 %)
121.200.0.0/19	is seen by 62 out of 84 ASes	(73 %)
121.255.0.0/16	is seen by 62 out of 84 ASes	(73 %)
122.0.0.0/24	is seen by 62 out of 84 ASes	(73 %)
122.50.0.0/21	is seen by 62 out of 84 ASes	(73 %)
122.100.0.0/20	is seen by 62 out of 84 ASes	(73 %)
122.200.0.0/19	is seen by 62 out of 84 ASes	(73 %)
122.255.0.0/16	is seen by 62 out of 84 ASes	(73 %)
123.0.0.0/24	is seen by 62 out of 84 ASes	(73 %)
123.50.0.0/21	is seen by 62 out of 84 ASes	(73 %)
123.100.0.0/20	is seen by 62 out of 84 ASes	(73 %)
123.200.0.0/19	is seen by 62 out of 84 ASes	(73 %)
123.255.0.0/16	is seen by 62 out of 84 ASes	(73 %)
193.0.0.0/21	is seen by 65 out of 84 ASes	(77 %)
84.205.83.0/24	is seen by 67 out of 84 ASes	(79 %)
Baseline 193.0.0.0/21
121.50.0.0/21	is seen by 48 out of 65 ASes	(73 %)
121.100.0.0/20	is seen by 48 out of 65 ASes	(73 %)
121.200.0.0/19	is seen by 48 out of 65 ASes	(73 %)
121.255.0.0/16	is seen by 48 out of 65 ASes	(73 %)
122.0.0.0/24	is seen by 48 out of 65 ASes	(73 %)
122.50.0.0/21	is seen by 48 out of 65 ASes	(73 %)
122.100.0.0/20	is seen by 48 out of 65 ASes	(73 %)
122.200.0.0/19	is seen by 48 out of 65 ASes	(73 %)
122.255.0.0/16	is seen by 48 out of 65 ASes	(73 %)
123.0.0.0/24	is seen by 48 out of 65 ASes	(73 %)
123.50.0.0/21	is seen by 48 out of 65 ASes	(73 %)
123.100.0.0/20	is seen by 48 out of 65 ASes	(73 %)
123.200.0.0/19	is seen by 48 out of 65 ASes	(73 %)
123.255.0.0/16	is seen by 48 out of 65 ASes	(73 %)
84.205.83.0/24	is seen by 51 out of 65 ASes	(78 %)
Baseline 84.205.83.0/24
121.50.0.0/21	is seen by 57 out of 67 ASes	(85 %)
121.100.0.0/20	is seen by 57 out of 67 ASes	(85 %)
121.200.0.0/19	is seen by 57 out of 67 ASes	(85 %)
121.255.0.0/16	is seen by 57 out of 67 ASes	(85 %)
122.0.0.0/24	is seen by 57 out of 67 ASes	(85 %)
122.50.0.0/21	is seen by 57 out of 67 ASes	(85 %)
122.100.0.0/20	is seen by 57 out of 67 ASes	(85 %)
122.200.0.0/19	is seen by 57 out of 67 ASes	(85 %)
122.255.0.0/16	is seen by 57 out of 67 ASes	(85 %)
123.0.0.0/24	is seen by 57 out of 67 ASes	(85 %)
123.50.0.0/21	is seen by 57 out of 67 ASes	(85 %)
123.100.0.0/20	is seen by 57 out of 67 ASes	(85 %)
123.200.0.0/19	is seen by 57 out of 67 ASes	(85 %)
123.255.0.0/16	is seen by 57 out of 67 ASes	(85 %)
193.0.0.0/21	is seen by 51 out of 67 ASes	(76 %)

Details

Column Descriptions: AS Number - autonomous system numbers seen anywhere in a path to any of the prefixes; Sees ... - a tick (or 'Y' if viewing this without graphics) indicates that we see the specified prefix with this AS somewhere in the AS Path; Peers ... - a tick here indicates that this AS is seen as an immediate neighbour of the AS announcing the specified prefix.

AS Number	Sees 121.50.0.0 /21	Sees 121.100.0.0 /20	Sees 121.200.0.0 /19	Sees 121.255.0.0 /16	Sees 122.0.0.0 /24	Sees 122.50.0.0 /21	Sees 122.100.0.0 /20	Sees 122.200.0.0 /19	Sees 122.255.0.0 /16	Sees 123.0.0.0 /24	Sees 123.50.0.0 /21	Sees 123.100.0.0 /20	Sees 123.200.0.0 /19	Sees 123.255.0.0 /16	Sees 193.0.0.0 /21	Sees 84.205.83.0 /24	\|	Peers 121.50.0.0 /21	Peers 121.100.0.0 /20	Peers 121.200.0.0 /19	Peers 121.255.0.0 /16	Peers 122.0.0.0 /24	Peers 122.50.0.0 /21	Peers 122.100.0.0 /20	Peers 122.200.0.0 /19	Peers 122.255.0.0 /16	Peers 123.0.0.0 /24	Peers 123.50.0.0 /21	Peers 123.100.0.0 /20	Peers 123.200.0.0 /19	Peers 123.255.0.0 /16	Peers 193.0.0.0 /21	Peers 84.205.83.0 /24
174																	\|
286																	\|
513																	\|
559																	\|
1103																	\|
1273																	\|
1299																	\|
1853																	\|
2118																	\|
2497																	\|
2857																	\|
2914																	\|
3257																	\|
3267																	\|
3277																	\|
3320																	\|
3333																	\|
3343																	\|
3356																	\|
3549																	\|
4637																	\|
4777																	\|
5392																	\|
5511																	\|
6067																	\|
6140																	\|
6320																	\|
6453																	\|
6461																	\|
6509																	\|
6762																	\|
7575																	\|
8167																	\|
8195																	\|
8210																	\|
8331																	\|
8342																	\|
8434																	\|
8442																	\|
8447																	\|
8468																	\|
8631																	\|
8763																	\|
8881																	\|
8928																	\|
9009																	\|
10764																	\|
11537																	\|
12350																	\|
12654																	\|
12695																	\|
12779																	\|
12793																	\|
12859																	\|
12956																	\|
12976																	\|
13030																	\|
13237																	\|
13645																	\|
15772																	\|
15837																	\|
16034																	\|
16150																	\|
16215																	\|
16735																	\|
19151																	\|
20483																	\|
20485																	\|
20562																	\|
20640																	\|
20932																	\|
20965																	\|
22548																	\|
22691																	\|
25232																	\|
25560																	\|
27664																	\|
28895																	\|
28917																	\|
29329																	\|
29686																	\|
30733																	\|
30844																	\|
39202																	\|

Some Explanations...

Not seeing the RIPE NCC's prefix 193.0.0.0/21 is probably caused by seeing one of the other prefixes from a peer which does not provide the RIS with a full feed.

Seeing the /16 but not the /21 in the new allocations is probably caused by incorrect prefix length based filtering somewhere along the line.

Seeing the newly allocated prefixes but not the 195.80.239.0/24 prefix is probably caused by filtering based on the RIR's minimum allocation size somewhere.

How these statistics were gathered

For each of the prefixes (121.50.0.0/21 121.100.0.0/20 121.200.0.0/19 121.255.0.0/16 122.0.0.0/24 122.50.0.0/21 122.100.0.0/20 122.200.0.0/19 122.255.0.0/16 123.0.0.0/24 123.50.0.0/21 123.100.0.0/20 123.200.0.0/19 123.255.0.0/16 193.0.0.0/21 84.205.83.0/24), all RIB entries and Updates for a single day were extracted from the RIS database and from this a list of all AS Paths seen for each prefix was generated. We class an AS as "seeing" one of the prefixes if that AS appears anywhere in an AS Path to that prefix. That an AS is shown as not seeing a particular prefix only indicates that this does not appear in the RIS.

All AS Paths...

27664 16735 12956 12654
12793 1299 12654
28895 1299 12654
28917 1299 12654
8447 1299 12654
2857 8928 1299 12654
16034 16150 12654
13030 20562 12654
16215 13030 20562 12654
13237 20562 12654
13645 19151 20562 12654
20483 12976 8195 20562 12654
3277