Assuming I formatted the query correctly (no promises), these are the 1900 operators in the FAA certification database:
AIR MIDWEST INC
BH CHARTER LTD
TULSA COUNTY AREA VOTECH DISTRICT NUMBE
CENTRAL MOUNTAIN AIR LTD
HAGELAND AVIATION SERVICES INC
FRONTIER FLYING SERVICE INC
GREAT LAKES AVIATION LTD
GULFSTREAM INTERNATIONAL AIRLINES INC
CORPORATE AIR
ISLAND AIR INC
SKY UNLIMITED LIMITED
SUBURBAN AIR FREIGHT INC
AMERIFLIGHT INC
CHAMPLAIN ENTERPRISES INC
SOUTHERN AIR CHARTER COMPANY LTD
SUNDANCE AIR INC
MEDICAL UNIVERSITY OF SOUTH CAROLINA
NORTH CARIBOO FLYING SERVICE LTD
NORTHROP GRUMMAN SYSTEMS CORPORATION
COLGAN AIR INC
NORTHERN THUNDERBIRD AIR LTD
EAGLE CANYON AIRLINES INC
PRINCE EDWARD AIR LTD
SKYLINK EXPRESS INC
RANGE SYSTEMS ENGINEERING COMPANY
SKYWAY AIRLINES INC
AIR GEORGIAN LTD
TAB EXPRESS AIRLINE INC
ALPINE AVIATION INC
SUNDANCE AIR VENEZUELA SA
PACIFIC EAGLE AVIATION LTD
WASAYA AIRWAYS LTD PARTNERSHIP
PACIFIC COASTAL AIRLINES LTD
HELIJET INTERNATIONAL INC FIXED WING
SERVICIOUS AEREOS PROFESIONALES INC
TRANS CARIBBEAN AIRWAYS INC
ALASKA CENTRAL EXPRESS INC
2734141 CANADA INC
ARIZONA EXPRESS AIRLINES INC
Good luck!
Dave