There are several types of IP settings available for the Ebook Central platform. The following IP settings are visible in LibCentral on the System Settings page.

Anonymous Access IPs
Access IPs 
Download IPs 
NOTE: IP ranges are limited to 18 bits. If you enter a range larger than 18 bits, you will receive the following error: "IP range not allowed. Please contact ebooksupport@proquest.com for assistance."
If your institution's IP range is larger than 18 bits, contact Ebook Support.