Yes for the most part.
NIFC is the National Interagency Fire Center in Boise, Idaho that controls resouces for all fire agencies including BLM, USFS, state and also NPS, FWS, BIA, etc. Just like shovels, and water pumps, radio frequencies and equipment are just another commodity to be issued.
Sometime around the turn of the century (millineum) they rolled the old BLM tacticals and commands and the USFS tacticals and commands into one list. Some of the BLM frequencies disappeared, and other frequencies appeared that were not there before.
Additionally, the USFS originally only had 3 tacticals, numbered 1, 2, and 3. In California they gave us 3 more many years ago because of all the large incidents but they are only to be used in California. They used to be called tac 4, 5, and 6.
With this new system, there is a NIFC tac 4, 5, and 6 as well so the numbers conflict. So the California tacs have become "region 5 tac" 4, 5, and 6 overlapping the NIFC tac 4, 5, and 6.
Birken