Tried listening after seeing your post. Seems all i'm getting on 453.100 is the paging tones, with none of the voice to go with it. Med 91 (856.4375) is completely silent. I looked up the licenses (KMK915 & WNQQ764) on the FCC website and they do not reflect any recent changes. Bit of a mystery.
On the up side, it's not your gear.