Here's a link someone had sent me that lists the main rangers by ranger badge number and then what park they are assigned.
The rangers badge number listed on this page would be the same as what you hear on the air when dispatch is calling an actual ranger.
Roster | Missouri State Parks
Not sure how accurate the above info is but a small portion of the list I have verified with a ranger I know in my area.
I don't know if any of the users with a "ranger" number also have a 3 or 4 digit DSN like the troopers and water patrol use. So a ranger with a call of say "Ranger 29" may be the actual DSN for that ranger.
Most of the water patrol DSN's heard on the rivers around my area have been in either the upper 900's (like 991 etc) and then I heard a few that were in the 11xx range for their DSN's. 1129 is an example of one that I heard a lot from over the last couple weeks. Not sure if 1129 was the actual DSN I heard as that info is not transmitted over the network as data so it is not logged but it was close to that number. He was working other users who were also using similar 11xx and 9xx something DSN's while searching the Meramec river out around Eureka.
All seemed to be doing water patrol work as they were all involved in a search of the Meramec river and its flood waters along the river since around the Memorial Day weekend.
I've heard the "Ranger" numbers from the link above being called on the Troop C dispatch talkgroups as well as the listed DNR talkgroups and some of the TG's listed as interop TG's.
I did not take written notes of the DSN's heard while they were involved in the river and flood water searches so I can't match any of those up to the many radio ID's that were logged. One of the DSN's I heard often came up on several different radio id's. That user must have been switching from a portable to a mobile maybe or even using another users radio if his radio was not handy at the time.
They gave GPS coordinates often during the daily searches as there were no landmarks to report over the air.
I heard GPS coordinates being read to those on the water by aircraft above as well as coordinates being read to the aircraft so they could look into areas that the flood waters must have made it impossible to reach by boat by those on the water. I don't recall the calls or DSN's assigned to the aircraft involved.
Anyway, if anyone hears a "Ranger xx" call, try and match it up at the link above and it may give an indication of that rangers home area.
I don't recall hearing any "Ranger" type calls during the river search efforts but I missed much of it due to work. Get off work and it was dark and all searches had been halted for the night.
I should have setup the HP1 and let it record for me.
edit: I should have added the fact that the MOSWIN system seemed to work well for those involved but I think some of the GPS location reports I heard were indicating trouble spots with the system.