Our first ever /16 listing goes to IMS Health, Inc. of Collegeville, PA.

NetRange:       162.44.0.0 - 162.44.255.255
CIDR:           162.44.0.0/16
NetName:        IMSHEALTH
NetHandle:      NET-162-44-0-0-1
Parent:         NET162 (NET-162-0-0-0-0)
NetType:        Direct Assignment
OriginAS:       
Organization:   IMS Health, Inc. (IMSHEA)
RegDate:        1992-05-07
Updated:        2012-10-26
Ref:            http://whois.arin.net/rest/net/NET-162-44-0-0-1

The reason for such drastic actions? Spam that was

Received: from cdthurricanemta.ims-emails.com (cdthurricanemta.ims-emails.com [162.44.202.90]

containing the following self-nomination to our list:

From: Healthcare Information <[email protected]>
Date: 16 Sep 2015 hh:mm:ss -0400
Subject: We request your permission

Dear Healthcare Provider,

We respect your time and value your opinion as a healthcare professional, which is why we would like an opportunity to communicate with you via email.

IMS Health, a healthcare information provider, and our clients would like to keep you up-to-date by providing the following types of healthcare related messages:

…

If you would like to receive healthcare related email information in the future from IMS Health, please do not take any additional actions.