BGP table change contributors: prefix flips (reannouncements after withdrawals)

50% flips from 150 ASes (3% of 5259 flipping ASes)
75% flips from 12.4% ASes
#events for AOL larger than for other ASes
not just background noise
                         					Cum
   type    ASN        Av.#pf   Flips Fp/Kupt Fp/Klft  %fps %fps  newap tmpdisp  re-app   finaldisp
 1 AOL  4323        421.72    1466      4.89      4.59   2.47   2.47        34          52         51        16
 2 Res     752             3.60    1444 564.72  335.58   2.44   4.91           1       659       658          2
 3 Bac     701      2196.94    1379      0.88      0.82   2.33   7.24       101       351       350        91
 4 Bac     702         956.48     924      1.36      1.32   1.56   8.80         68       373       346        45
 5 Bac   3908        652.29      921      1.99      1.79   1.55  10.35        63       105       109        43
 6 Bac     705         397.04     661      2.34      2.18   1.12  11.47        62       162       165        46
 7 Mil   1580         180.75     613      4.77      4.36   1.03  12.50           5       147       144          7
 8 Mil   3475           28.91     540     26.27   21.79   0.91  13.41        23       237       238        22
 9 Dev   4755        308.19     510      2.33      2.20   0.86  14.27        31       195       180        31
10 Dev  8708        161.29     497      4.33      4.14   0.84  15.11        21        52          59        19

Under best conditions, a prefix flips once in 3 months
Aside: global (all-peer) prefixes have twice as much flux as semiglobal (flux estimates depend on the prefix set)