Bulk measures: Dec. 2001 BGP tables 


Global prefixes (26 peers):   102394
Semiglobal (13 or more peers): 103828
Multiorigin prefixes (union of 26 tables): 1170

Smallest blocks (/24s):  57% of global
More specifics:                50% of global

ASes:  12399
Transit ASes: 2001 (16%)
AS paths: 15-16K/table
links in BGP graph: 25630
Atoms: 25698

Average prefixes per AS:   >8
Maximum #prefixes announced by single AS: 2103
ASes with one prefix:                             40%
Prefixes announced by such ASes:      5% 
ASes with over 100 prefixes:                  1%    <--- we define as "large ASes"
Prefixes announced by such ASes:      32%