This information might be helpful for listeners trying to identify federal agencies heard on various frequencies. The Department of the Interior (DOI) allocated, or would it be IRAC, assigned number series to specific DOI agencies callsigns (formatted just like FCC licenses as most of us know). This series involves the last three characters or the number portion of the callsign. The assignments are as follows:
200 Misc agencies
300 Misc agencies
400 Bureau of Land Management
500 Bureau of Indian Affairs
600 U.S. Fish and Wildlife Service
700 National Park Service
800 Bureau of Reclamation
900 Bonneville Power Administration, Southwestern Power Administration and Southeastern Power Administration, all formerly of the Department of the Interior and subsequently absorbed by the Department of Energy when it was created in 1977.
Some examples of this in my local area are the KOJ437 callsign for the BLM Carson City District and KMC719 of Yosemite National Park.
I don't recall where I first came across this information, but it was quite some time ago, measured in two or three decades. I know that it was official information I ran across while employed by the U.S. Forest Service.
I hope this information is of some use to others.
200 Misc agencies
300 Misc agencies
400 Bureau of Land Management
500 Bureau of Indian Affairs
600 U.S. Fish and Wildlife Service
700 National Park Service
800 Bureau of Reclamation
900 Bonneville Power Administration, Southwestern Power Administration and Southeastern Power Administration, all formerly of the Department of the Interior and subsequently absorbed by the Department of Energy when it was created in 1977.
Some examples of this in my local area are the KOJ437 callsign for the BLM Carson City District and KMC719 of Yosemite National Park.
I don't recall where I first came across this information, but it was quite some time ago, measured in two or three decades. I know that it was official information I ran across while employed by the U.S. Forest Service.
I hope this information is of some use to others.