Do they usually use "Brickyard"?
Brickyard is a very common callsign in the Northeast US airspace used by a US Airways, United Airlines, and other major airlines' regional carrier now operating under the company name of Republic Airlines.
See here for their website:
http://www.republicairlines.com/whoweare.html
"Brickyard" is the call sign only for Republic Airlines only who is code share partners with US Airways and Frontier" Republic Airways Holdings owns three operating certificates, Chautauqua call sign "Chautauqua", Shuttle America call sign "Mercury" and Republic Airlines call sign "Brickyard" Shuttle code shares for Delta and United. Chautauqua code shares with American, Continental, Delta, United and US Airways