If a resource requires your IPs in one format or another (CIDR versus IP
range, etc.) there are many sites online that will help you convert back
and forth, e.g.: https://www.ipaddressguide.com/cidr

For instance, 222.222.2.222/27 is equivalent to 222.222.2.192
- 222.222.2.223.

Best,
Eric


On Wed, Jul 9, 2025 at 7:30 AM Tim McMahon <
[log in to unmask]> wrote:

> Are there any other IP related fields in the online form?  Maybe one
> marked netmask?  I doubt I'd know what to do even if I had that info,
> but I'm thinking maybe someone here could be more help with more info.
>
> On 7/9/25 8:12 AM, Kristin Oberholtzer wrote:
> > [ External Email ]: This email originated from outside of the
> organization. Do not click links or open attachments unless you recognize
> the sender and know the content is safe.. When in doubt, contact your IT
> Department
> >
> >
> > Our campus IP will soon change, and I am preparing to update our many
> > eresource providers. While we can update a fair number by logging into
> the
> > providers' admin portals and manually changing our settings, quite a few
> > will need to be handled by direct contacts to the providers.
> >
> > I am not especially technical and would welcome some basic insights on
> the
> > question below so we can minimize confusion when we contact providers.
> >
> > The format of the old IP is 1111.11.1.1 and the format of the new IP is
> > 222.222.2.222/27
> > The first eresource we tested (via updating the admin portal) would not
> > accept the /27 portion of the new IP. My colleague's explanation was that
> > the /27 suffix denotes how many bytes are available, which is extraneous
> > technical info that some systems may need, but is not required. Since our
> > old IP does not have such a suffix, and it was rejected in our testing, I
> > am inclined to omit the /27 when we contact providers. In nontechnical
> > terms please, do you advise including or excluding the /27 suffix?
> >
> > Thank you!
> > Kristin
> > Franklin & Marshall College Library
>
> --
> Tim McMahon
> West Liberty Public Library
>