no input info in the RRDB so far
the FCC ULS shows only 2 licensed users of 154.9575 in Massachusetts - Shrewsbury and Barnstable County - so unless Shrewsbury has some sort of strange mutual aid comms agreement with Cape Cod, one would have to guess that Shrewsbury PD is using 154.9575 as an tac channel / short range channel - maybe even a portable extender channel (MO3)