Visitors passing thru Northbound today via Norfolk ATC,Wash Ctr>ZNY 1330 local BLADE-11 flight of 3 direct Albany via JFK vortac 1350 local SCAR-61 flight of 4 direct Albany via JFK vortac 1355 local QUILL-23 flight of 3? (sounded like) Alabany same as above. All at FL 270 last pushing ZNY 323.000 None self id type.. Any ideas who? Mark Maryland