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

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 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 ASnumber name This  (Last) 1 (9)  Novant Health Inc. novanthealth.org/ AS18495 NOVANT-AS1  US 293  (6) 34.3% 2 (-)  Sutter Health www.sutterhealth.org/ AS46648 SUTTERHEALTH  US 272  (-) 31.9% 3 (-)  Texas Children\'s Hospital www.texaschildrens.org/ AS11015 TCH-AS  US 253  (-) 29.7% 4 (2)  WIN AS www.win.be/ AS9208 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/ AS20252 JSIWMC  US 7  (11) 0.821% 6 (-)  U.S. Dept. of Health and Human Services www.hhs.gov/ AS26810 HHSNET-NOC-ASN  US 5  (-) 0.586% 7 (7)  University of Pittsburgh Medical Center www.upmc.com AS122 U-PGH-NET-AS  US 4  (7) 0.469% 8 (-)  SSM Health Care www.ssmhc.com AS26305 ASN-SSM  US 3  (-) 0.352% 9 (-)  UT Southwestern Medical Center at Dallas www.swmed.edu AS13998 SWMED  US 3  (-) 0.352% 10 (10)  Cedars-Sinai Health Systems www.cedars-sinai.edu/ AS22328 CSHS  US 3  (4) 0.352%   Total 853 100% Not  in this ranking but in previous - (1)  Cleveland Clinic Foundation www.clevelandclinic.org AS22093 CCF-NETWORK  US -  (2,172) - (4)  Mayo Foundation for Medical Education and Research www.mayo.edu/en.wikipedia.org/wiki/Mayo_Medical_School AS7973 MAYO  US -  (10) - (5)  DoD Network Information Center www.nic.mil/ AS1778 DMSSC-GATEWAY  US -  (9) - (6)  Thomas Jefferson University Hospitals www.jeffersonhospital.org/ AS22644 TJUH  US -  (8) - (8)  The Children_s Hospital of Philadelphia www.chop.edu/ AS7328 CHOP  US -  (6)