Picking up where published guides once covered, and where formerly easy to access web databases once ruled, RadioReference.com is whole lot of information cleanly put together online.
RadioReference.com is the world’s largest radio communications data provider, featuring a complete frequency database, trunked radio system information, and FCC license data. RadioReference is also the largest broadcaster of public safety live audio communications feeds, hosting thousands of live audio broadcasts of Police, Fire, EMS, Railroad, and aircraft communications.
With hundreds of thousands of members, RadioReference is a world leading collaboration platform for public safety communications professionals and hobbyists.
As a heads-up the Mobile version http://m.radioreference.com is hand and shows very cleanly on my phone, though it is a limited portion of the whole website.