| 7301 | CIAQ | CANUS INDUSTRIES | | | SCAC4 |
| 7302 | CIAS | CHEVIN TRANSPORT | | | SCAC4 |
| 7303 | CIAT | CITY AUTO TOWING INC | | | SCAC3 |
| 7304 | CIAU | GEODIS RT ITALIA SRL | | I | BIC |
| 7305 | CIAU | CIAT ROSSI SPA | | | SCAC4 |
| 7306 | CIAU | | Real: CI | AUS | TRAFFIC |
| 7307 | CIAV | CIAVARELLA, FRANK J | | | SCAC3 |
| 7308 | CIAY | CAROLINA AUTO PROCESSING SERVICE | | | SCAC3 |
| 7309 | CIAY | C I TRANSPORTATION | | | SCAC4 |
| 7310 | CIB | Condor Berlin GmbH | IATA: DF, Callsign: Condor Berlin, | D | AVCODES |
| 7311 | CIB | Condor | | | ICAO1 |
| 7312 | CIBC | CONTINENTAL CARRIAGE LIMOUSINE SERV | | | SCAC3 |
| 7313 | CIBD | C I TRANSPORT | | | SCAC4 |
| 7314 | CIBE | C I CONTAINER LINE | | | SCAC4 |
| 7315 | CIBF | CHEMICAL INTERCHANGE COMPANY | | | SCAC4 |
| 7316 | CIBG | CARGILL INCORPORATED | | | SCAC4 |
| 7317 | CIBI | CASAS INTERNATIONAL BROKERAGE INC | | | SCAC3 |
| 7318 | CIBM | CONCORD INTERNATIONAL TRANSPORT INC | | | SCAC4 |
| 7319 | CIBR | CIRCLE B RANCH | | | SCAC3 |
| 7320 | CIBS | CITIBUS | | | SCAC3 |
| 7321 | CIBT | CIRCLE B TRANSPORTATION SYSTEMS INC | | | SCAC3 |
| 7322 | CIBT | CAPTRAN LOGISTICS LLC | | | SCAC4 |
| 7323 | CIBU | CONT-ASPHALT LTD. | | CH | BIC |
| 7324 | CIBU | CONT-ASPHALT LTD | | | SCAC4 |
| 7325 | CIBW | CIRBIN INC | | | SCAC4 |
| 7326 | CIBX | The CIT Group/Capital Finance, Inc. | added 7/2008 | | NAKINA |
| 7327 | CIBX | THE CIT GROUP/CAPITAL FINANCE, INC. | | | PWRC |
| 7328 | CIBX | CIT GROUP/CAPITAL FINANCE INC, THE | | | SCAC4 |
| 7329 | CIC | ICC International Cargo Charters Canada Ltd.. d/b/a ICC Canada Ltd. | Callsign: Air Trader, | CDN | AVCODES |
| 7330 | CIC | Celtic Airways Ltd. | Callsign: Celtic, | GB | AVCODES |
| 7331 | CIC | ICC Canada | | | ICAO1 |
| 7332 | CIC | Cedar Rapids and Iowa City Ry. Co. | 4/1938-7/2005 | | NAKINA |
| 7333 | CIC | Cedar Rapids and Iowa City Ry. Co. | 4/38-7/2000 | | NRHS |
| 7334 | CIC | CEDAR RAPIDS & IOWA CITY RAILWAY COMPANY (CRANDIC) | | | PWRC |
| 7335 | CIC | Cedar Rapids and Iowa City Railway (Crandic) | | | RSRV |
| 7336 | CICA | CISA SA | | CH | VKM |
| 7337 | CICB | CITRANS CORP, THE | | | SCAC3 |
| 7338 | CICC | CIAPUSCI, CHARLES A | | | SCAC3 |
| 7339 | CICD | CICIONI, ALFRED J | | | SCAC3 |
| 7340 | CICE | COMICAGE ENTERTAINMENT | | | SCAC4 |
| 7341 | CICF | CICIONI, FRANK C | | | SCAC3 |
| 7342 | CICH | COMBITRANS CONSOLIDATORS INC | | | SCAC4 |
| 7343 | CICI | CENTRAL INDIANA CARTAGE | | | SCAC3 |
| 7344 | CICI | CENTRAL ILLINOIS CARRIERS INC | | | SCAC4 |
| 7345 | CICJ | CRUISE-IN-COMFORT INC | | | SCAC3 |
| 7346 | CICJ | CANDO CONTRACTING INC | | | SCAC4 |
| 7347 | CICK | CIRCLE C TRUCK LINES INC | | | SCAC3 |
| 7348 | CICM | CHI-CAN TRANSPORT LTEE | | | SCAC3 |
| 7349 | CICM | CHAMPION COACH INC | | | SCAC4 |
| 7350 | CICN | CALSSIC BULK CARRIERS INC | | | SCAC4 |
| 7351 | CICO | CICIO TRUCKING CO INC | | | SCAC3 |
| 7352 | CICP | CAPRICORNIO TRANSPORT S.A | | | SCAC3 |
| 7353 | CICQ | CIRCLE TRANSPORT INC | | | SCAC3 |
| 7354 | CICR | CLIFTON IRON COMPANY RAILROAD | | | PWRC |
| 7355 | CICR | CONTINENTAL CARRIERS INC | | | SCAC4 |
| 7356 | CICS | CHEMICAL SERVICES CORP | | | SCAC3 |
| 7357 | CICT | CIRCLE C TRANSPORTATION COMPANY | | | SCAC3 |
| 7358 | CICU | CIMC CONTAINERS HOLDING COMPANY LTD | | PRC | BIC |
| 7359 | CICU | CIE IMMOBILIERE & COMMERCE | | | SCAC3 |
| 7360 | CICU | CHINA INTERNATIONAL MARINE CONTAINE | | | SCAC4 |
| 7361 | CICV | CICALESE, VINCENT J | | | SCAC3 |
| 7362 | CICV | CATTLE RIDE TRANSPORT | | | SCAC4 |
| 7363 | CICW | CAMELI INTERNATIONAL AND CO. N V | | | SCAC3 |
| 7364 | CICY | CIRCLE CITY TRANSPORT INC | | | SCAC3 |
| 7365 | CID | Asia Continental Airlines | Callsign: Acid, | KZ | AVCODES |
| 7366 | CID | Asia Continental Airlines | | | ICAO1 |
| 7367 | CIDB | CRUCES INTERNACIONALES DE LIQUIDOS | | | SCAC4 |
| 7368 | CIDC | COMMERCIAL INDUSTRIAL COURIER SERVI | | | SCAC3 |
| 7369 | CIDC | CONSOLIDADORA INTERNACIONAL DE CARG | | | SCAC4 |
| 7370 | CIDF | CRUCES INTERNACIONALES DE FRONTERA | | | SCAC4 |
| 7371 | CIDH | CRITICALSHIP INC | | | SCAC4 |
| 7372 | CIDI | CRAIG-IMPERIAL DISTRIBUTION CO | | | SCAC3 |
| 7373 | CIDK | CENTRAL ILLINOIS COURIER | | | SCAC4 |
| 7374 | CIDL | COIL-LINE LIMITED | | | SCAC4 |
| 7375 | CIDM | CRIDER MOVING & STORAGE | | | SCAC4 |
| 7376 | CIDN | CITI CORP DINERS CLUB INC | | | SCAC3 |
| 7377 | CIDO | CITY DELIVERY SERVICE | | | SCAC3 |
| 7378 | CIDO | CASITA DEL SOL | | | SCAC4 |
| 7379 | CIDP | CINDARN PLASTICS | | | SCAC3 |
| 7380 | CIDQ | CITY DRAY & TRANSFER | | | SCAC3 |
| 7381 | CIDR | CONENTAL INDUSTRIES INC | | | SCAC3 |
| 7382 | CIDS | COLLINS INDUSTRIES INC | | | SCAC4 |
| 7383 | CIDT | C I D S TRANSPORTATION INC | | | SCAC3 |
| 7384 | CIDU | I.C.T.C. NV | | B | BIC |
| 7385 | CIDV | CITY DELIVERY SERVICE | | | SCAC3 |
| 7386 | CIDX | CITY OF DAYTON | | | PWRC |
| 7387 | CIE | Czech Government Flying Service | Callsign: Czechia, | CZ | AVCODES |
| 7388 | CIE | Czech Government Flying Service | | | ICAO1 |
| 7389 | CIE | Iarnrod Eireann (Coras Iompair Eireann) | | IE | VKM |
| 7390 | CIEA | CORAL LINES S.A | | | SCAC3 |
| 7391 | CIEB | CINDER EXPRESS | | | SCAC3 |
| 7392 | CIEC | CENTRAL IOWA ENERGY COOPERATIVE | | | SCAC3 |
| 7393 | CIED | CROSSLINE CARRIERS INC | | | SCAC3 |
| 7394 | CIEE | CIALES EXPRESS INC | | | SCAC3 |
| 7395 | CIEG | CIMARRON EXPRESS INC | | | SCAC3 |
| 7396 | CIEG | CIMARRON EXPRESS INC | | | SCAC4 |
| 7397 | CIEH | CHELA LOGISTICS INC | | | SCAC4 |
| 7398 | CIEI | CITY OF EVANSTON | | | SCAC3 |
| 7399 | CIEK | CORRIEA TRUCKING CO | | | SCAC3 |
| 7400 | CIEK | CIM LOGISTICS INC | | | SCAC4 |
