Once upon a time, I started RabbitEars (with Bruce's help) with a goal of providing information on stations' technical operations, their programming, as well as their history. While the first two have been well represented, the third has been... lacking, to say the least. I never really made any in-roads with it.
That changes now. I'm pleased to announce a new feature on RabbitEars, Historic Allotments. You'll find this in the Listings drop-down menu. It contains a record of every TV allotment that ever existed in the analog TV table of allotments, stretching from 1945 through the end of the digital TV transition. You can watch how the allotments changed over time, see what changes happened on particular dates, and even plot the allotments on a map.
Already, I'm considering adding another function to it beyond the current Table, List, Changes, and Map functionalities, but I think this is enough to launch it with. Be sure to read the documentation if you have questions. I look forward to hearing feedback!