| 1 | CLP | Aero Club de Portugal | Callsign: Club Portugal, | P | AVCODES |
| 2 | CLP | Aero Club De Portugal | | | ICAO1 |
| 3 | CLP | The Clarendon and Pittsford R.R. Co. | 1/1975; added 1/1977; 1/1980-7/2005 | | NAKINA |
| 4 | CLP | The Clarendon and Pittsford R.R. Co. | 1/75; added 1/77; 1/80-7/2000 | | NRHS |
| 5 | CLP | CLARENDON & PITTSFORD RAILROAD | | | PWRC |
| 6 | CLP | Clarendon and Pittsford Railroad | | | RSRV |
| 7 | CLP | The Clarendon and Pittsford R.R. Co. | | USA | TRAFFIC |
| 8 | CLPA | COASTLINE TRANSPORT INC | | | SCAC4 |
| 9 | CLPB | CLAYPOOL, BILLY | | | SCAC3 |
| 10 | CLPC | CO-ALLIANCE LLP | | | SCAC4 |
| 11 | CLPD | CONSOLDIATED PIER DELIVERIES INC | | | SCAC3 |
| 12 | CLPF | CAL-PAC INDUSTRIES | | | SCAC3 |
| 13 | CLPG | CLARK TRANSPORT CO | | | SCAC3 |
| 14 | CLPH | CLP TRANSPORTATION, INC | | | SCAC3 |
| 15 | CLPH | CLIMER TRUCKING LLC | | | SCAC4 |
| 16 | CLPI | C & L ENTERPRISES | | | SCAC3 |
| 17 | CLPJ | CLINE, PHIL TRUCKING | | | SCAC3 |
| 18 | CLPJ | CREMERIA LOS PIONEROS SA DE CV | | | SCAC4 |
| 19 | CLPL | CLARCO PIPELINE COMPANY | | | SCAC3 |
| 20 | CLPL | CLASSIC PLASTICS | | | SCAC4 |
| 21 | CLPM | CLP ENTERPRISES INCORPORATED | | | SCAC3 |
| 22 | CLPN | CALIFORNIA PRODUCE DISTRIBUTORS | | | SCAC3 |
| 23 | CLPN | CLAPPER CORPORATION | | | SCAC4 |
| 24 | CLPO | CLIPPER TRUCKING CO | | | SCAC3 |
| 25 | CLPP | CULPEPPER TRAILER SALES INC | | | SCAC3 |
| 26 | CLPP | CLIPPER BULK SHIPPING LTD | | | SCAC4 |
| 27 | CLPQ | CASTLE LEASING CORP | | | SCAC3 |
| 28 | CLPQ | CLEOPATRA TRUCKING LLC | | | SCAC4 |
| 29 | CLPR | CLIPPER LINES, INC | | | SCAC3 |
| 30 | CLPR | CLIPPER INC | | | SCAC4 |
| 31 | CLPS | CREST LIMOUSINE SERVICES INC | | | SCAC3 |
| 32 | CLPT | CLOVER PASS TRANSFER | | | SCAC3 |
| 33 | CLPT | COLES PETROLEUM BULK INC | | | SCAC4 |
| 34 | CLPU | CARGOSOL LOGISTICS PVT.LTD. | | IND | BIC |
| 35 | CLPU | CLARENDEN AND PITTSFORD RAILROAD | | | SCAC3 |
| 36 | CLPV | CARTER, LEWIS INCORPORATED | | | SCAC3 |
| 37 | CLPW | CLIPPER CRUISE LINE INC | | | SCAC3 |
| 38 | CLPW | CARTER LOGISTIC GROUP LLC (REFRIGER | | | SCAC4 |
| 39 | CLPX | Boulder Scientific Co. | 1/1994-7/2005 (not listed) | | NAKINA |
| 40 | CLPX | Boulder Scientific Co. | 1/94-7/2000 | | NRHS |
| 41 | CLPX | BOULDER SCIENTIFIC COMPANY | | | PWRC |
| 42 | CLPX | Boulder Scientific | | | RSRV |
| 43 | CLPX | BOULDER SCIENTIFIC COMPANY | | | SCAC4 |
| 44 | CLPY | COLOPY MOVING & STORAGE INC | | | SCAC3 |
| 45 | CLPY | CHEM LAB PRODUCTS INC | | | SCAC4 |
| 46 | CLPZ | CLARENDON & PITTSFORD RR | | | PWRC |
| 47 | CLPZ | Clarendon and Pittsford Railroad | | | RSRV |
| 48 | CLPZ | CLARENDEN AND PITTSFORD RAILROAD | | | SCAC3 |
| 49 | CLPZ | CLARENDON AND PITTSFORD RAILROAD CO | | | SCAC4 |
