IP Registration & Updates

Registering IP addresses for eResources purchased through MCLS

Please submit all new IP addresses, and any changes, additions, and deletions to MCLS.

One computer

If you have only one computer in your library that you want to have access to a product, report a single IP:

Multiple computers

If you have more computers that you want to have access to a product (for example, your entire library or campus), report all of the relevant IPs, such as:

Range of individual IPs

A group of computers;, for example: 123.456.789.12-17

Class C range

Up to 256 computers at a site;*, for example: 123.456.789.*

Class B range

Up to 65,536 computers at a site;*, for example: 123.456.*

To register or to report any addition or change in your library's IP address, use the IP Reporting Form.

You will be asked to verify the following about your IP address:

We can only register static, external, or dedicated IP addresses. 

If you're unsure of your IP address, point your browser to new-window-icon.png and write down the IP address that is presented.

Static IP addresses

Static IP addresses stay the same every time you log on. IP changes should happen infrequently (for example, only when work is done on your network). See How To Determine If Your IP is Static Or

External (or routable) IPs

External IPs are the IP addresses presented to the outside world regardless of how workstations/printers/etc. are addressed within your network. An external IP address is the one assigned by your Internet Service Provider while an internal IP is assigned to each machine by your local network. If providing an IP range for authorization, please indicate if the range includes workstations outside the library. See How To Determine If Your IP Is External. new-window-icon.png Or you may point your browser to new-window-icon.png from several workstations and if they all return the same IP address, that is the external/routable IP. (In this environment, workstations in your local network are assigned individual nonroutable, internal IP addresses.)

The following IP address ranges are ALWAYS internal IPs and should not be submitted for authorization:

*** NOTE: We are not able to accept IPs in CIDR notation.