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IP Registry

We partner with The IP Registry to make the process of checking, monitoring and updating the IP addresses used to authenticate access to content as easy as possible for librarians.

What is The IP Registry?

The IP Registry is a single repository that contains over 1.5 billion verified IP addresses for over 60,000 content licensing organizations worldwide, accessible by both publishers and libraries and maintained for the benefit of the whole scholarly communication community.

With The IP Registry, a service by PSI, publishers and libraries can save time and streamline processes, eliminate errors, improve the reliability of usage metrics, and ensure the right content is accessible to the right users.

The IP Registry can be accessed through our Librarian portal DG Data.

In order to change or update your IPs, please register with The IP Registry.

Benefits include:

  • IPs will be updated in real-time from The IP Registry into the De Gruyter system.
  • IPs will be validated upon input to reduce errors and access issues.
  • The service is free for libraries.
  • IPs are sent to other publishers where you may have licensed content, not just De Gruyter, with no need to contact all individually.
  • The IP Registry does not share any personal data, so only your IPs are passed on to publisher systems.

Want to learn more? Have a look at our recorded info session on The IP Registry:

If you have further questions about The IP Registry, have a look at their FAQ pages or see our FAQs below.

IP Registry: Frequently Asked Questions

What is The IP Registry?

The IP Registry is a single repository of over 1.5 billion validated IP addresses for more than 70,000 content licensing organisations worldwide, accessible by both publishers and libraries and maintained for the benefit of the whole scholarly communication community.

It is administered by PSI (Publisher Solutions International Ltd), based in Oxford, UK, and Boston, US, and operative since 2005.

There are almost 4,000 registered customers providing IP updates to participating publishers (see list attached), from a range of organisation types: universities, public libraries, national libraries, government, medical and corporate.

Why choose The IP Registry?

This new service ensures accurate communication of IPs, reduces delay in access for users, and saves you time: Through The IP Registry, you can communicate IP changes to multiple publishers with just one click.

All IPs associated with your subscriptions are vetted by The IP Registry to prevent duplication and/or misallocation before they are communicated to publishers.

Every update via The IP Registry is applied to the systems almost instantaneously, avoiding possible delays of the communication via email, which could affect your patrons’ access to the contents.

Each time your IT department or proxy server provider needs to register an IP address change, you need to notify each of your content providers; these can be hundreds of individual publishers and require multiple emails to each. Some, or all, of your users, may be denied access to content for as long as this process takes.

Moreover, by limiting the opportunity for mistakes due to the manual copying of long strings of IPs, The IP Registry provides very accurate usage metrics: It checks for errors upon input (typos in the ranges, ranges that are too large or registered to a different country), making the data a lot cleaner and more reliable.

Is the service free?

Yes, the service is free for all libraries and will remain so, as it is financed by the participating publishers.

How do I register?

To register, please visit and click on Not registered yet? Sign up here!

Be sure to check your spam folder, in case you haven’t received the confirmation email. You can find a step-by-step explanation in the attached “Registration Process” guide.

If you are having any trouble registering, you can contact the

Need more help? Please consult our quick manual for registration.

How do I add or delete IPs in the IP Registry?

If you need to make any changes in your IPs, please follow the step-by-step explanation in the attached guide “Add or Delete IP Process”.

If you are still having trouble with the changes, please contact

How do the IPs get from the IP Registry to De Gruyter?

The IP Registry sends the IPs via an API to the mapped De Gruyter account in our new admin system Liblynx. Our system receives updates from the IP Registry every two hours, which in turn grants content access to your patrons very quickly.

What can I add to the IP Registry?

You can add all your IPs, including proxy IPs. The IP Registry accepts both IPv4 and IPv6. If you use a VPN connection, please ensure to add your IPv6.

Can multiple staff members at my library register for access?

Yes, The IP Registry allows multiple administrators to manage the same organization.

Once you are registered, you can check all registered accounts for your institution on your main profile page under “Manage my Organisations” - “Browse Menu”.

Can I manage IPs for multiple affiliated institutions?

Yes, The IP Registry allows a single administrator to manage multiple organizations.

It can build a hierarchy and allocate different IPs to different parts of the hierarchy.

Institutional hierarchies (universities and various libraries, or colleges, departments, etc.) and IPs can be customized by submitting a request for IP management privileges to

The IP Registry will build the customized hierarchy to best reflect the way organizations license access to content.

Is The IP Registry secure?

Absolutely! Access to the registry is by IP address and username/password to ensure that it is secure.

PSI is taking major steps to detect and prevent fraud, verifying IP addresses for content access, and to ensure to ensure that all personal data is protected against loss, theft, misuse and unauthorised access or disclosure. They employ appropriate administrative, physical and technical security measures, including limiting access to the information through electronic security systems and passwords, training employees on data protection policies, obliging employees and third parties we engage to process data to respect confidentiality, and storing data on secure servers.

Furthermore, PSI has developed two block lists designed to help organisations protect themselves from various forms of cyber-crime, such as phishing, spamming, hacking. Here you can find further information on the PSI Block Lists:

If you require any further detail, please contact Andrew Pitts, CEO of the IP Registry,, who will be happy to address all your questions and concerns.

Where can I find the Privacy Policy and the Terms & Conditions?

To have detailed information regarding GDPR compliance and data protection and processing queries, please visit:

If you have any comments, questions or concerns regarding this Privacy Policy or the processing of your information, please contact Andrew Pitts at or

Who can I contact for more information?

If you would like to have more information on The IP Registry, you can contact their customer service department directly at

If you have further questions about the partnership between De Gruyter and The IP Registry, please contact Katharina Baier, Senior Manger Sales Operations, She is happy to provide answers, arrange a call with you, or a joint meeting with the IP Registry to address your concerns and requests.

More Information on Access, Holdings, and Admin

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