All, Today in the 1500 hour (EST) caught Baltimore Sector (165.2375 PL 100.0) trying to contact Customs aircraft Omaha 47Y. This was probably a C-12 (King Air) N7247Y. Over the last week or so I've heard more Customs aircraft activity in this area than I have in the past 4 years. RON ANNE ARUNDEL COUNTY, MD (NEAR BWI)