They're installing new repeaters in much of the country. The input(s) apparently remain on 163.8125 but the outputs have been shifted to frequencies chosen between 168 and 174 MHz. The newer repeaters appear to use an NAC of $293. Rumor has it that other agencies besides the Marshals use these new DOJ systems. In the Kansas City area the outputs are on 168.9125 and 171.6125, presumably one in KS and one in MO. They usually simulcast but different input NACs can probably select one or the other. They are generally encrypted.