DELTA - INTERNATIONAL 1-239
DELTA - DOMESTIC (INTL EQUIPMENT) 240-249
DELTA - DOMESTIC 250-1299
IT TESTING $ DL/DCI RES/ACS NEEDS/OH ACS 1300-1399
DELTA - DOMESTIC 1400-1904
DELTA - SHUTTLE 1905-1974
SKYWEST - ASM BUY 1975-1999
PINNACLE 2000-2099
CONTINENTAL 2100-3522
US HELICOPTER 3523-3562
OPEN 3563-3662
SKYWEST - PRORATE 3663-3742
SKYWEST - ASM BUY 3743-4149
ATLANTIC SOUTHEAST AIRLINES (ASA) 4150-4932
COMAIR 4933-5699
AMERICAN EAGLE 5700-5844
FUTURE CODESHARE/DCI 5845-5957
FREEDOM AIRLINES 5958-6212
CHAUTAUQUA AIRLINES 6213-6432
SHUTTLE AMERICA 6433-6512
NORTHWEST 1ST RANGE 6513-7649
EXPRESS JET - ASM BUY 7650-7749
EXPRESS JET - PRORATE 7750-7829
CHINA SOUTHERN 7830-7839
ROYAL AIR MAROC 7840-7849
KOREAN 7850-7939
AEROLITORAL (AM) 7940-7999
AEROMEXICO 8000-8149
ALITALIA 8150-8287
AIR FRANCE 8288-8709
CSA 8710-8769
KLM 8770-8899
AVIANCA 8900-8939
CHINA AIRLINES 8940-8974
EL AL(DISCONTINUED 30MAR08) 8975-8991
CHINA SOUTHERN(2ND RANGE)(EFF 30MAR08) 8975-8991
ALASKA 8992-9124
FUTURE CODESHARE 9125-9284
AIR FRANCE 9285-9384
US HELICOPTER GROUND HANDLING 9385-9399
CODESHARE PARTNER GROUND HANDLING 9400-9406
SKYWEST DOD/FLT OPS ASM BUY 9407-9415
SKYWEST EXTRA SECTIONS/TRANSITION/MKTG 9416-9417
SKYWEST DOD/FLT OPS-PRORATE 9418-9421
ATLANTIC SOUTHEAST DOD/FLT OPS 9422-9429
FREEDOM EXTRA SECTIONS 9430-9439
COMAIR DOD/FLT OPS 9433-9434
OPEN 9435-9440
COMAIR STUB FLIGHTS 9441-9444
DCI TESTING $ BUSINESS NEEDS 9445-9452
CHAUTAQUA DOD/FLT OPS 9453-9454
CONTRACT CARRIER HANDLING 9455-9574
EXPRESS JET EXTRA SECTIONS ASM BUY 9575-9576
EXPRESS JET CHARTERS ASM BUY 9577-9579
DELTA STUB FLIGHTS 9580-9659
DELTA SHUTTLE DOD/FLIGHT OPS 9660-9689
DL EXTRA SECTION/TRANSITION/CHARTER MKTG 9690-9705
Y CLASS EQUIPMENT/MARKETING 9706-9713
TRANSITION MKTG (INCLUDES DOUBLE DATED) 9714-9733
TRANSITION MKTG INTERNATIONAL AIRCRAFT 9734-9739
PINNACLE EXTRA SECTIONS 9740-9741
PINNACLE DOD/FLT OPS 9742-9743
CHAUTAQUA AIRLINES CHARTERS 9744-9745
COMAIR CHARTERS 9746-9750
COMAIR DOD / FLT OPS 9751-9758
COMAIR EXTRA SECTIONS 9759-9763
ATLANTIC SOUTHEAST EXTRA SECTIONS 9764-9767
ATLANTIC SOUTHEAST CHARTERS 9768-9774
DL CHARTERS 9775-9839
EXPRESS JET EXTRA SECTIONS - PRORATE 9840-9842
OPEN 9843-9849
DL FLIGHT CONTROL/DL EXTRA SECTIONS (U) 9850-9899
DL FERRY 9900-9934
DL FERRY FROM/TO FUNCTIONAL CHECK FLIGHTS 9935-9939
CHAUTAQUA DOD/FLIGHT OPS 9940-9944
SHUTTLE AMERICA CHARTERS 9945-9945
SHUTTLE AMERICA DOD/FLIGHT OPS 9946-9949
ATLANTIC SOUTHEAST FERRY FLIGHTS 9950-9959
FREEDOM DOD / FLIGHT OPS 9960-9966
OH FERRY 9967-9969
ATLANTIC SOUTHEAST STUB FLIGHTS 9970-9975
FUNCTIONAL CHECK FLIGHTS (FCF) - FERRY 9976-9979
VERIFICATION FLIGHTS (VF) 9980-9985
FUNCTIONAL CHECK FLIGHTS (FCF) FERRY 9986-9991
TRAINING FLIGHTS 9992-9996
PUBLICITY FLIGHTS 9997-9998
NON REV NRSB - SSR FLIGHT NUMBER 9999-9999

Now, I have no idea the actual logic behind the numbering system.
-b-