| 6501 | CHGE | CHARLEY, G E | | | SCAC3 |
| 6502 | CHGF | CARROLL HOSPITAL GROUP INC | | | SCAC4 |
| 6503 | CHGG | CHIGGER EQUIPMENT HAUL INC | | | SCAC4 |
| 6504 | CHGH | COLUMBIA HOLDINGS INC | | | SCAC4 |
| 6505 | CHGI | CHATTANOOGA TRANSFER AND STORAGE CO | | | SCAC3 |
| 6506 | CHGJ | CHG LOGISTICS INCORPORATED | | | SCAC4 |
| 6507 | CHGL | CHICAGO HARVARD & GENEVA LAKE RWY | | | PWRC |
| 6508 | CHGM | CHRISMAN LP GAS | | | SCAC4 |
| 6509 | CHGN | CHAMPAGNE LIMOUSINE SERVICE | | | SCAC3 |
| 6510 | CHGN | CHOICEONE LOGISTICS INC | | | SCAC4 |
| 6511 | CHGP | CHALLENGE TRANSPORTATION INC | | | SCAC3 |
| 6512 | CHGQ | CHICAGO HAULAGE INC | | | SCAC3 |
| 6513 | CHGR | CHALLENGER MANUFACTURING LTD | | | SCAC4 |
| 6514 | CHGS | CASCADE HOLDINGS INC | | | SCAC4 |
| 6515 | CHGT | CHICAGO TRANSPORT INC | | | SCAC3 |
| 6516 | CHGV | CHAMBERLAIN HAULING | | | SCAC4 |
| 6517 | CHGW | CHICAGO TOWING INC | | | SCAC3 |
| 6518 | CHGY | CHARCY COMPANY | | | SCAC3 |
| 6519 | CHGY | CHARCY COMPANY | | | SCAC4 |
| 6520 | CHGZ | CHOTEAU GRAIN COMPANY | | | PWRC |
| 6521 | CHH | Hainan Airlines Company Limited | IATA: HU, Callsign: Hainan, IATA Prefix: 880, Name changed to Hainan Airlines Holding Company Limited. IATA designator changed from HX | PRC | AVCODES |
| 6522 | CHH | Hainan Airlines Company Limited | IATA: H4, Callsign: Hainan, IATA designator changed to HX | PRC | AVCODES |
| 6523 | CHH | Hainan Airlines Company Limited | IATA: HX, Callsign: Hainan, IATA designator changed from H4. IATA changed to HU | PRC | AVCODES |
| 6524 | CHH | Hainan Airlines Holding Company Limited | IATA: HU, Callsign: Hainan, IATA Prefix: 880, Name changed from Hainan Airlines Company Limited. IATA designator changed from HX | PRC | AVCODES |
| 6525 | CHH | Hainan Airlines | IATA: HU | | ICAO1 |
| 6526 | CHH | Cheswick & Harmar | 1/1975-1/1980 | | NAKINA |
| 6527 | CHH | Cheswick & Harmar | 1/75-1/80 | | NRHS |
| 6528 | CHH | CHESWICK & HARMAR RAILROAD | | | PWRC |
| 6529 | CHH | Cheswick and Harmar | | | RSRV |
| 6530 | CHHA | CAWARD HEAVY HAUL LLC | | | SCAC4 |
| 6531 | CHHB | CHAPPELL HILL SAUSAGE COMPANY | | | SCAC4 |
| 6532 | CHHC | CHANNEL HOME CENTERS INC | | | SCAC3 |
| 6533 | CHHD | C & H HEAVY DUTY SPECIALISTS INC | | | SCAC3 |
| 6534 | CHHE | CHARTERHOUSE | | | SCAC3 |
| 6535 | CHHE | CANCHOLA ESCALANTE, JUAN ANTONIO | | | SCAC4 |
| 6536 | CHHG | CHURCHILL TRUCKING INC | | | SCAC3 |
| 6537 | CHHG | CHAUDHARY TRUCKING INC | | | SCAC4 |
| 6538 | CHHH | CROSSROAD HIGHWAY HAULERS LLC | | | SCAC4 |
| 6539 | CHHI | CHATTAHOOCHEE INDUSTRIAL SERVICES I | | | SCAC3 |
| 6540 | CHHJ | CHERRY HILL MOVING & STORAGE | | | SCAC3 |
| 6541 | CHHJ | CHERRY HILL MOVING & STORAGE | | | SCAC4 |
| 6542 | CHHK | CHEROKEE TRANSPORTATION INC | | | SCAC3 |
| 6543 | CHHK | CHINA SHIPPING CONTAINER LINES (HON | | | SCAC4 |
| 6544 | CHHM | CHEMCENTRAL CORP | | | SCAC3 |
| 6545 | CHHM | CMA HEAVY HAUL INC | | | SCAC4 |
| 6546 | CHHN | CHRISTIANSEN, HARLIN TRUCKING INC | | | SCAC3 |
| 6547 | CHHN | CHOHAN CARRIER LTD | | | SCAC4 |
| 6548 | CHHO | CHA-CO TRAILS | | | SCAC3 |
| 6549 | CHHP | CHURCHILL LOGISTICS INC | | | SCAC4 |
| 6550 | CHHQ | CHERRY HILL CLUB LIMITED | | | SCAC4 |
| 6551 | CHHR | CHATTANOOGA RUNNERS INC | | | SCAC3 |
| 6552 | CHHS | CHRISTIANSON TRUCKING CO | | | SCAC3 |
| 6553 | CHHT | CHRISTIANSEN TRUCKING | | | SCAC3 |
| 6554 | CHHU | CLH CONTAINER LOGISTIC HAMBURG GMBH & CO KG | | D | BIC |
| 6555 | CHHU | CLH CONTAINER LOGISTIC HAMBURG GMBH | | | SCAC4 |
| 6556 | CHHV | CHENAULT, HARVEY | | | SCAC3 |
| 6557 | CHHV | CLAIBORNE HEAVY HAULING LLC | | | SCAC4 |
| 6558 | CHHW | CONTINENTAL HOME HARDWARE AND CABIN | | | SCAC4 |
| 6559 | CHHY | CHERAMIE, HUEY L INC | | | SCAC3 |
| 6560 | CHHY | COMERCIALIZADORA HERMANOS HAYASHI | | | SCAC4 |
| 6561 | CHI | Cougar Helicopters, Inc. | Callsign: Cougar, | CDN | AVCODES |
| 6562 | CHI | Cougar Helicopters | | | ICAO1 |
| 6563 | CHI | Chichibu Railway | | J | TRAFFIC |
| 6564 | CHIA | CHINATRANS INTERNATIONAL LIMITED | | | SCAC4 |
| 6565 | CHIB | CHARLO INC | | | SCAC3 |
| 6566 | CHIB | CHICAGO LOGISTIC SERVICE INC | | | SCAC4 |
| 6567 | CHICAGO | | City: Chicago | USA | TRAFFIC |
| 6568 | CHICHIBU | | | J | TRAFFIC |
| 6569 | CHID | CHILDS MOVING & STORAGE INC | | | SCAC3 |
| 6570 | CHIE | CHRISTIANSEN, R E TRUCKING INC | | | SCAC3 |
| 6571 | CHIF | CHIEFTAIN EXPRESS, INC | | | SCAC3 |
| 6572 | CHIG | CHAR-LO INC | | | SCAC3 |
| 6573 | CHIH | CHARMER INDUSTRIES INC | | | SCAC3 |
| 6574 | CHIHNAN | Chihnan Bus Company, Ltd | City: Taipei | RC | TRAFFIC |
| 6575 | CHIK | CHICKASAW MOTOR LINE | | | SCAC3 |
| 6576 | CHIL | CHILDRESS TRANSPORT | | | SCAC3 |
| 6577 | CHIL | Chiltern Railways Ltd. | Real: CR, 1999: 269km standard gauge, not electrified Chiltern Railways is a train operating company in England. It was formed by the privatisation of British Rail in 1996 and it operates train mainline services from Marylebone station in London, to Aylesbury and Birmingham Snow Hill. Initially the line was franchised to a company formed by the British Rail managers of the route, but since 2003 has been a wholly owned subsidiary of Laing Rail, who owned a much smaller shareholding at privatisation. In 2002 a new 20 year franchise began which promises significant investment in the route. | GB | TRAFFIC |
| 6578 | CHIM | CHIPMAN CORPORATION | | | SCAC3 |
| 6579 | CHIN | CHICAGO INDIANA RAILWAY | | | PWRC |
| 6580 | CHIO | CHICAGO TRIBUNE | | | SCAC3 |
| 6581 | CHIO | CHILOS TRUCKING | | | SCAC4 |
| 6582 | CHIP | CHIPPEWA MOTOR FRT INC | | | PWRC |
| 6583 | CHIP | CHIPS EXPRESS INC | | | SCAC4 |
| 6584 | CHIQ | CHIPPEWA VALLEY TRANSPORTATION CO I | | | SCAC3 |
| 6585 | CHIQ | CHEMAS INTERNACIONAL S DE RL DE CV | | | SCAC4 |
| 6586 | CHIS | CHICKALOON SERVICE | | | SCAC3 |
| 6587 | CHIS | CHICKALOON SERVICE | | | SCAC4 |
| 6588 | CHITOSE | Chitose Sougo Kanko Bus | | J | TRAFFIC |
| 6589 | CHIU | TEXTAINER EQUIPMENT MANAGEMENT LTD | | BM | BIC |
| 6590 | CHIU | CHIMCO - BULGARIA | | | PWRC |
| 6591 | CHIU | Chimco | | | RSRV |
| 6592 | CHIU | CAPITAL LEASE LTD | | | SCAC4 |
| 6593 | CHIV | CHILTON MOVING & STORAGE | | | SCAC3 |
| 6594 | CHIV | C H I OVERHEAD DOORS INC | | | SCAC4 |
| 6595 | CHIW | CHILEAN LINE INC | | | PWRC |
| 6596 | CHIW | CHILEAN LINES INC | | | SCAC3 |
| 6597 | CHIW | COMPANIA SUD AMERICANA DE VAPORES S | | | SCAC4 |
| 6598 | CHIX | Consolidated Holdings Co., Inc. | added 4/1975; 1/1980; eliminated 1/1983 | | NAKINA |
| 6599 | CHIX | Chicago Tank Car Co. | 7/1930-7/1935 | | NAKINA |
| 6600 | CHIX | Consolidated Holdings Co., Inc. | added 4/75; 1/80; eliminated 1/83 | | NRHS |
