Surprise winner AS 18495 NOVANT-AS1 came up from number nine.
|1||(9) ||AS18495 NOVANT-AS1|| US|
|2||(-) ||AS46648 SUTTERHEALTH|| US|
|3||(-) ||AS11015 TCH-AS|| US|
|4||(2) ||AS9208 WIN|| BE|
|5||(3) ||AS20252 JSIWMC|| US|
|6||(-) ||AS26810 HHSNET-NOC-ASN|| US||
Three of the top six didn't place at all last month. Could they be having infosec problems?
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CBL data missing 6 December 2011.
PSBL data missing 5 December 2011, and oddly low 13-21 Dec.
The top 3, AS 18495 NOVANT-AS1,
AS 46648 SUTTERHEALTH, and
AS 11015 TCH-AS, show very similar curves, raising the question of whether they are infested by the same botnet and are unknowingly being used in the same spam campaigns.
Congratulations to Cleveland Clinic for cleaning up its act!
Four others also dropped out from last month.
Unfortunately, five new ones joined.