A good friend of our radio blog pages Mark Cleary has passed along his latest reference sheets for the following services that use the HF spectrum: US Coast Guard (complete list of aircraft, cutters, callsigns, and various shore establishments), DHS Cothen Net, DEA Panther Net, TISCOM, FBI ALE Net, and the US Army Latin American Skywatch Net.
All of these sheets are posted to the two blogs listed below and links to these and other frequency references posted to these blogs are located down the right hand side of the blog pages.
Btown Monitoring Post: http://monitor-post.blogspot.com/
Milcom Monitoring Post: http://mt-milcom.blogspot.com/