Yes the Wiki is a good place to start, but many freq's have been changed around and are not always active.
Down the Cape, good luck, sorry. Even the die-hard Federal [Non Mil] monitors cry for activity or to hear what we on the Mainland Hear.
Why I tend to recommend to folks just begining is to SEARCH the following bands
for a few weeks and see what you hear first.
138-144 Mhz [12.5 Khz Splits] 148-150.8 Mhz [12.5 Khz Splits]
162-174 Mhz [12.5 Khz Splits] and finally 406-420 Mhz [12.5 Khz Splits]
All FM
The 138-151 you might [hint hint hint] concentrate at 8pm nightly and Sunday 8a-11a for various NETS [CG AUX, MARS etc] The others will vary depending on your Antenna situation.
Federal Monitoring is still a close-to-the-vest target and not everyone will openly share the secrets.
Take a try at the above and post back.
Also, take a gander over at
ScanNewEngland
Can anybody help me with the federal law enforcement rqdio frequencies in Massachusetts ie FBI, DEA, ATF,US Marshall and Postal Inspectors. Thank you