Fed freq hit on pro 106 on 95 bridge

Hi guys, I've been signal stalking a LONG time, different scanners. While in Portsmouth NH this morning, got a few gmrs hits, ( 1 may be the social security building, need more tune in time ) but on my way onto the I-95 northbound RAMP, I got a hit.. i quickly pushed STORE. At the height of the 95 bridge, my signal stalker went off again with encryption .. So I hit STORE again.. I just got home, and heres what I caught. I have never heard these before..All I ever caught in Portsmouth was 408.200/p25 ...

418.675-nac-156 ,

418.750-nac-156

both encrypted, new to Portsmouth? Or did a signal travel 100 miles?