I'm not sure if it is a BLM allocated frequency, but many frequencies in the 170 MHz range are allocated to the Forest Service, National Park Service, and U.S. Fish and Wildlife Service as well as the BLM. The distinction is not really particularlarly important as this frequency is used by all of these agencies anyway. It is shared with the state as well. It should be shown in the database in a way that if you are looking at the BLM, Forest Service, and NDF you would find it no matter which one of them you are looking at.