Got to know this from one of my colleagues. Looks promising. For my Electronic Resources peers who are interested to find out more about this, check their website: IPRegistry.org
One of the benefits: “make it easier for libraries to communicate any changes in their authentication details to all publishers who sign up to use the service, saving them significant time and reducing errors. The registry already contains 1.5 billion validated IP addresses for over 60,000 content licensing organisations worldwide.” Taken from their news release .
Hope this helps.