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This topic has been renamed to fit the description better.

This is an overall list of active licenses for POCSAG and/or FLEX transmitters across the midwest that are used mainly for emergency communications. Including police, fire calls, house fires, severe weather warnings watches & advisories, EAS, shootings, etc. regarding HIPAA information, unfortunately that topic is a complicated one to discuss...
All licenses are already listed in this website's FCC database and are already active until their specified dates...

Regarding Indiana Paging Network:

Some information regarding one of the most active POCSAG networks in the midwest. Includes licenses, frequencies that you may encounter. All data is decodable in PDW and other paging decoder software such as MultimonNG. IPN's website also contains a send-a-page option that allows you to send a POCSAG message to a specified device.

KNKJ297 -> Active until 2029. Renewed since 2009. 72-76 Mhz is occupied as direct modulation outputs of 454.325 (as in AFSK modulated transmission links). This entire license uses this frequency all across the state and is practically serving the whole state of Indiana, parts of IL and Chicago. Some other frequencies to listen to: 459.325, 459.375 & 473.0625. The La Porte transmitter that contains the frequencies of 473.0625 and the primary input 454.325 MHz is received all the way as far as Muskegon, MI. And sometimes as far as Kent County (140+ miles!!).

KNKM492: Primarily a UHF license, it uses UHF frequencies of 931 Mhz with 473 MHz modulation inputs to them as well.
KNKJ285: not as big, but still uses the same 454.325 as KNKJ297. Uses 473.2875 as its AFSK transmission links.
KNKM446: Again, not as big. Perhaps localized...instead uses 454.375 and 72.02 (AFSK).
WPUK831: Im not sure if this was primarily intended for private use as an AFSK only or some other purpose...
WNQR258: For low-power use possibly for restaurants or healthcare...

For IL:
This allocation is extremely weird because some of these licenses are combined together with different feeds of data, and can range to different licenses.

If you are in downtown chicago: you will most likely receive these:

Most of these licenses have been allocated to AT&T. Aka the old "American Messaging System".
KSA810. Primarily, 454.475 is the frequency that dominates this license. It also mixes modes up with PSK and AFSK together as various modes, with most of the modes sounding similar to v.27ter (8PSK in a way) with different center audio carriers. It is fed as a primary output from KTS203 on 158.1 MHz. Again, we dont know why.
KNKH915. Apparently this license does not have a listing of 454.425 MHz which it should. Reason, because the FCC website only lists the 931 Mhz frequencies only..And...as 454.425 only outputs QAM glenayre noise, with a morse ID every hour, it isnt really pliable for the license to be revealed since the traffic is on 931.

KTS203: Again, as mentioned, the only license that has 158.1 MHz...

Im unsure if these licenses are indeed active, but we'll list them here anyways:
KSA262: Somehow I didnt realize Arch Wireless was a nationwide provider for pagers too. 454.275 Mhz. 72.1, 72.64 & 75.64 MHz.
KSA310: another license by another nationwide provider called metrocall.
KNKP207: I dont know why this is shared with Indiana paging network, but due to the coverage, ig it works.
KNKG281: Another metrocall license.

This post is still being edited and will be added on.