Here's my list of what I can pick up on my HP-1 with a RS-800 antenna from the Greater Hartford area
FBI : 167.5625, 167.5875 (Springfield), 167.6625. 167.7375, 168.2250, 168.8250 (New Haven), 168.8750,
170.5000 (Hartford), 170.6250, 170.9125, 170.9250,171.4250, 173.4750 (most active recently)
DEA : 414.4750, 415.6000, 416.1000, 418.6250 (Springfield), 418.6750, 418.7500. 418.8250 (Springfield),
419.4500 (Hartford)
ICE : 163.6500, 163.7000, 168.5875, 168.9250, 170.7750
CPB : 163.6250, 165.2375, 168.8375 (aerial surveillance), 171.0750
Interop (FedCom) 171.2250, 171.4000
IRS : 165.9500
AGAIN, all these are not active at all times... some are much more active than others, but this will get you started. Don't forget to search for the NAC too, that;ll confirm who is who.
I should also say, I only listen to LEO Feds, not TSA, or FPS etc.....
Hope this helped
Paul S.