December 2011 Monthly  World  Medical from PSBL Volume
(Last Month, Next Month)

1 (9)  AS 18495 NOVANT-AS1  US 2 (-)  AS 46648 SUTTERHEALTH  US 3 (-)  AS 11015 TCH-AS  US 4 (2)  AS 9208 WIN  BE 5 (3)  AS 20252 JSIWMC  US 6 (-)  AS 26810 HHSNET-NOC-ASN  US More...

Three of the top six didn't place at all last month. Could they be having infosec problems?

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values.csv CBL data missing 6 December 2011.
PSBL data missing 5 December 2011, and oddly low 13-21 Dec. Change the chart to logarithmic.

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.

December 2011 Monthly  World  Medical from PSBL Volume
(Last Month, Next Month)

Interestingly, Sutter Health dropped out of the CBL rankings but still shows up in these PSBL rankings. And perennial CBL winner WIN is only #4 here. Rank Organization Country Volume Vol% This - (Last)  ()  Name Website AS number name This  (Last) 1 (9)  Novant Health Inc. novanthealth.org/ AS 18495 NOVANT-AS1  US 293  (6) 34.3% 2 (-)  Sutter Health www.sutterhealth.org/ AS 46648 SUTTERHEALTH  US 272  (-) 31.9% 3 (-)  Texas Children\'s Hospital www.texaschildrens.org/ AS 11015 TCH-AS  US 253  (-) 29.7% 4 (2)  WIN AS www.win.be/ AS 9208 WIN  BE 10  (40) 1.17% 5 (3)  Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University www.med.cornell.edu/ AS 20252 JSIWMC  US 7  (11) 0.821% 6 (-)  U.S. Dept. of Health and Human Services www.hhs.gov/ AS 26810 HHSNET-NOC-ASN  US 5  (-) 0.586% 7 (7)  University of Pittsburgh Medical Center www.upmc.com AS 122 U-PGH-NET-AS  US 4  (7) 0.469% 8 (-)  SSM Health Care www.ssmhc.com AS 26305 ASN-SSM  US 3  (-) 0.352% 9 (-)  UT Southwestern Medical Center at Dallas www.swmed.edu AS 13998 SWMED  US 3  (-) 0.352% 10 (10)  Cedars-Sinai Health Systems www.cedars-sinai.edu/ AS 22328 CSHS  US 3  (4) 0.352%   Total 853 100% Not  in this ranking but in previous - (1)  Cleveland Clinic Foundation www.clevelandclinic.org AS 22093 CCF-NETWORK  US -  (2,172) - (4)  Mayo Foundation for Medical Education and Research www.mayo.edu/ en.wikipedia.org/wiki/Mayo_Medical_School AS 7973 MAYO  US -  (10) - (5)  DoD Network Information Center www.nic.mil/ AS 1778 DMSSC-GATEWAY  US -  (9) - (6)  Thomas Jefferson University Hospitals www.jeffersonhospital.org/ AS 22644 TJUH  US -  (8) - (8)  The Children_s Hospital of Philadelphia www.chop.edu/ AS 7328 CHOP  US -  (6)