| 1 | CIA | Civil Aviation Authority of the Slovak Republic | Callsign: Calimera, | SK | AVCODES |
| 2 | CIA | CIPRA | Callsign: Cipra, | F | AVCODES |
| 3 | CIA | CIPRA | | F | AVCODES |
| 4 | CIA | Civil Aviation Authority | | | ICAO1 |
| 5 | CIAA | CONTINENTAL TRANSPORTATION | | | SCAC3 |
| 6 | CIAA | CAMERON LOGISTICS INC | | | SCAC4 |
| 7 | CIAB | CAROLINA AMERICAN TOURS | | | SCAC3 |
| 8 | CIAC | CICALESE, RICHARD TRUCKING | | | SCAC4 |
| 9 | CIAD | CIPOLLA, RICHARD | | | SCAC3 |
| 10 | CIAE | CRAIG IMPERIAL ACME CONSOLIDATORS I | | | SCAC3 |
| 11 | CIAE | CRAIG IMPERIAL ACME CONSOLIDATORS I | | | SCAC4 |
| 12 | CIAF | CAVALIER INTERNATIONAL AIR FREIGHT | | | SCAC4 |
| 13 | CIAG | CIRCLE A CARTAGE | | | SCAC3 |
| 14 | CIAH | COLUMBIA HAULERS INC | | | SCAC3 |
| 15 | CIAH | COSMO EXPRESS INTERNATIONAL CORPORA | | | SCAC4 |
| 16 | CIAJ | CODELITE INC | | | SCAC4 |
| 17 | CIAK | CTE INC | | | SCAC4 |
| 18 | CIAL | CONTINENTAL AIR FREIGHT | | | SCAC3 |
| 19 | CIAL | C I ANALYTICS | | | SCAC4 |
| 20 | CIAN | CHRISTIAN, PAUL | | | SCAC3 |
| 21 | CIAN | CHARIOTS AFIRE LLC | | | SCAC4 |
| 22 | CIAO | CAROLINA AIR CARGO | | | SCAC3 |
| 23 | CIAP | COLUMBINE CONSOLIDATED SERVICES INC | | | SCAC3 |
| 24 | CIAQ | CINCINNATI ASSEMBLEY & DISTRIBUTION | | | SCAC3 |
| 25 | CIAQ | CANUS INDUSTRIES | | | SCAC4 |
| 26 | CIAS | CHEVIN TRANSPORT | | | SCAC4 |
| 27 | CIAT | CITY AUTO TOWING INC | | | SCAC3 |
| 28 | CIAU | GEODIS RT ITALIA SRL | | I | BIC |
| 29 | CIAU | CIAT ROSSI SPA | | | SCAC4 |
| 30 | CIAU | | Real: CI | AUS | TRAFFIC |
| 31 | CIAV | CIAVARELLA, FRANK J | | | SCAC3 |
| 32 | CIAY | CAROLINA AUTO PROCESSING SERVICE | | | SCAC3 |
| 33 | CIAY | C I TRANSPORTATION | | | SCAC4 |
