| 16501 | CTEJ | CTL MARITIME INC | | | SCAC4 |
| 16502 | CTEK | COMPETITION TIRE EAST INC | | | SCAC4 |
| 16503 | CTEL | CARIBBEAN TRAILER EXPRESS LINE | | | SCAC3 |
| 16504 | CTEL | CENTURY TRUCKING EXPRESS LLC | | | SCAC4 |
| 16505 | CTEM | CERES TERMINALS INC | | | SCAC3 |
| 16506 | CTEM | CTS ELECTRO DE MATAMOROS SA DE CV | | | SCAC4 |
| 16507 | CTEN | COMMERCIAL TERMINAL SERVICE INC | | | SCAC3 |
| 16508 | CTEO | COASTAL TRANSFER CO | | | SCAC3 |
| 16509 | CTEP | C T S ENTERPRISES INC | | | SCAC3 |
| 16510 | CTEQ | C T INC | | | SCAC3 |
| 16511 | CTER | The Indiana & Ohio Rail System | added 4/1995; eliminated 7/1999 | | NAKINA |
| 16512 | CTER | The Indiana & Ohio Rail System | added 4/95; eliminated 7/99 | | NRHS |
| 16513 | CTER | *CINCINNATI TERMINAL RAILWAY CO. (THE) | | | PWRC |
| 16514 | CTER | *INDIANA AND OHIO RAIL SYSTEM | | | PWRC |
| 16515 | CTES | | City: Cesky Tesin | CZ | TRAFFIC |
| 16516 | CTET | CROTEAU TRANSPORT INC | | | SCAC3 |
| 16517 | CTEU | SHENZHEN CIMC INTELLIGENT TECHNOLOGY CO., LTD. | | PRC | BIC |
| 16518 | CTEU | SPANISH LINES | | | PWRC |
| 16519 | CTEU | Spanish Lines | | | RSRV |
| 16520 | CTEU | CAVE WOOD TRANSPORT LTD | | | SCAC3 |
| 16521 | CTEW | CAROLINA TOOL & EQUIPMENT CO | | | SCAC3 |
| 16522 | CTEX | The CIT Group/Capital Finance, Inc. | added 1/2006 | | NAKINA |
| 16523 | CTEX | PLM International, Inc. | added 4/1991; 1/1994-7/2005; eliminated 1/2006 | | NAKINA |
| 16524 | CTEX | Canterra Energy, Ltd. | added 1/1984; eliminated 4/1991 | | NAKINA |
| 16525 | CTEX | PLM International, Inc. | added 4/91; 1/94-7/2000 | | NRHS |
| 16526 | CTEX | Canterra Energy, Ltd. | eliminated 4/91 | | NRHS |
| 16527 | CTEX | *CANTERRA ENERGY LTD. | | | PWRC |
| 16528 | CTEX | +THE CIT GROUP/CAPITAL FINANCE INC. {(PLMX) PLM INTERNATIONAL, INC.] | | | PWRC |
| 16529 | CTEX | Canterra Energy (PLM International) | | | RSRV |
| 16530 | CTEX | CIT GROUP/CAPITAL FINNACE INC, THE | | | SCAC4 |
| 16531 | CTEY | COUNTESS TRUCKING COMPANY | | | SCAC3 |
| 16532 | CTEZ | CHRYSLER TRENTON ENGINE | | | PWRC |
| 16533 | CTF | CETFA, S.A. | Callsign: Fotocarto, | E | AVCODES |
| 16534 | CTF | Cutter Aviation | Callsign: Cutter Flight, | USA | AVCODES |
| 16535 | CTF | Compania Transport Feroviar | | RO | TRAFFIC |
| 16536 | CTF | COMPANIA DE TRANSPORT FEROVIAR BUCURESTI SA | | RO | VKM |
| 16537 | CTFA | CENTRAL TRACTOR FARM & FAMILY CENTE | | | SCAC3 |
| 16538 | CTFB | CLINE TRANSFER INC | | | SCAC3 |
| 16539 | CTFC | C & T EXPRESS TRANSPORT INC | | | SCAC4 |
| 16540 | CTFD | CENTRAL TRANSFER LTD | | | SCAC3 |
| 16541 | CTFE | CT'S FURNITURE ENTERPRISES | | | SCAC4 |
| 16542 | CTFER | Impresa COSTFER S.r.l. | | IT | VKM |
| 16543 | CTFF | COMPREHENSIVE TRAFFIC SYSTEMS INC | | | SCAC4 |
| 16544 | CTFG | CAROLINA TRANSFER & STORAGE | | | SCAC3 |
| 16545 | CTFG | CONSUL-TECH TRAFFIC MANAGEMENT INC | | | SCAC4 |
| 16546 | CTFH | CENTER TRANSFER SERVICE INC | | | SCAC3 |
| 16547 | CTFH | CHASTAIN TRUCKING LLC | | | SCAC4 |
| 16548 | CTFI | CENTURY TRANSFER & STG | | | SCAC3 |
| 16549 | CTFJ | CAITO, FRANCIS J INC (AN INDIANA CO | | | SCAC3 |
| 16550 | CTFJ | CORNERSTONE TRANSPORTATION SERVICES | | | SCAC4 |
| 16551 | CTFK | C & T FERTILIZER INC | | | SCAC3 |
| 16552 | CTFL | CANNATELLI FUEL COMPANY | | | SCAC4 |
| 16553 | CTFM | COULTERS TRANSFER & STORAGE CO | | | SCAC3 |
| 16554 | CTFO | CENTRAL TRANSFER & STORAGE CO | | | SCAC3 |
| 16555 | CTFQ | COTNEY TRANSFER | | | SCAC3 |
| 16556 | CTFR | CARPENTER TRANSFER INC | | | SCAC3 |
| 16557 | CTFT | COAST FREIGHT SYSTEM INC | | | SCAC3 |
| 16558 | CTFU | CON.A.P. SCRL | | I | BIC |
| 16559 | CTFU | CON A P SCRL | | | SCAC4 |
| 16560 | CTFV | CT FREIGHT | | | SCAC4 |
| 16561 | CTFW | COAST FREIGHTWAYS INC | | | SCAC3 |
| 16562 | CTFY | COAST TRANSFER CO INC, (DIV OF CTCI | | | SCAC3 |
| 16563 | CTG | Canadian Coast Guard | Callsign: Canadian Coast Guard, | CDN | AVCODES |
| 16564 | CTG | Canadian Coast Guard | | | ICAO1 |
| 16565 | CTGA | CERTIFIED GASOLINES | | | SCAC4 |
| 16566 | CTGB | CREATIVE LOGISTICS INC | | | SCAC4 |
| 16567 | CTGD | CONESTOGA TRANSPORTATION INC | | | SCAC3 |
| 16568 | CTGE | CARTHAGE FREIGHT LINE INC | | | SCAC3 |
| 16569 | CTGE | COT' N GEAR | | | SCAC4 |
| 16570 | CTGG | COTTON TRUCKING CO | | | SCAC3 |
| 16571 | CTGH | CAINS TRUCKING | | | SCAC3 |
| 16572 | CTGI | C T L TRUCKING INC | | | SCAC3 |
| 16573 | CTGJ | COLT TRUCKING COMPANY | | | SCAC3 |
| 16574 | CTGJ | CENTURY TRUCKING | | | SCAC4 |
| 16575 | CTGK | COAN TRUCKING | | | SCAC3 |
| 16576 | CTGK | COLUMBIA TRANSFER INC | | | SCAC4 |
| 16577 | CTGL | COMMERCIAL TRUCKING & LEASING INC | | | SCAC3 |
| 16578 | CTGL | COARD TRANSPORTATION GROUP LTD | | | SCAC4 |
| 16579 | CTGM | CARTHAGE MARINE TRANSPORT LLC | | | SCAC4 |
| 16580 | CTGO | CITIES SERVICE OIL CO | | | SCAC3 |
| 16581 | CTGP | COMMERCIAL TRUCKING CO | | | SCAC3 |
| 16582 | CTGQ | CARLSONS TRUCKING | | | SCAC3 |
| 16583 | CTGQ | CHARLES TAMAYO, CARLOS JOEL | | | SCAC4 |
| 16584 | CTGR | CAMAS TRANSPORT INC | | | SCAC3 |
| 16585 | CTGR | CAMAS TRANSPORT INC | | | SCAC4 |
| 16586 | CTGS | CONCRETE TRUCKING SERVICE INC | | | SCAC3 |
| 16587 | CTGT | COOPER, T G TRUCKING | | | SCAC3 |
| 16588 | CTGU | C-TANK GLOBAL PTE.LTD | | SGP | BIC |
| 16589 | CTGU | CONTAINER TRADING & LEASING | | | SCAC3 |
| 16590 | CTGV | COLEMAN TRUCKING INC | | | SCAC3 |
| 16591 | CTGW | CONNOISEUR TOURS OF THE GOLDEN WEST | | | SCAC3 |
| 16592 | CTGW | CANALES TRUCKING | | | SCAC4 |
| 16593 | CTGY | CONICOR TRANSPORT INC | | | SCAC4 |
| 16594 | CTGZ | COMBINED TRANSPORT GROUP, INC. | | | PWRC |
| 16595 | CTGZ | Combined Transport Group | | | RSRV |
| 16596 | CTH | China General Aviation Corporation | | | ICAO1 |
| 16597 | CTH | CALIFORNIA TOUCH OF CLASS | | | SCAC4 |
| 16598 | CTHB | CONNECTICUT TRANSIT | | | SCAC3 |
| 16599 | CTHB | CITY TRANSFER FAYETTEVILLE LLC | | | SCAC4 |
| 16600 | CTHC | CURLEY TRUCKING CO | | | SCAC4 |
