| 1 | PTC | Patria Cargas Aereas, S.A. | Callsign: Patria, | USA | AVCODES |
| 2 | PTC | Pilot Training College | Callsign: Mentor, | IRL | AVCODES |
| 3 | PTC | Patria Cargas Aereas | | | ICAO1 |
| 4 | PTC | Plainview Terminal Co. | added 1/1996; eliminated 4/1997; 7/2000-7/2005 | | NAKINA |
| 5 | PTC | Peoria Terminal Co. | 1/1975-1/1980 | | NAKINA |
| 6 | PTC | Peoria Terminal Co. | 1/75-1/80 | | NRHS |
| 7 | PTC | Plainview Terminal Co. | added 1/96; eliminated 4/97; 7/2000 | | NRHS |
| 8 | PTC | PLAINVIEW TERMINAL COMPANY (CODE FORMERLY USED BY PEORIA TERMINAL) | | | PWRC |
| 9 | PTC | Plainview Terminal | | | RSRV |
| 10 | PTC | PLAINVIEW TERMINAL COMPANY | | | SCAC4 |
| 11 | PTC | Philadelphia Transportation Co. | | USA | TRAFFIC |
| 12 | PTCA | PATTEE, CLARE INC | | | SCAC3 |
| 13 | PTCA | PTC AIR FREIGHT INC | | | SCAC4 |
| 14 | PTCB | PURPOSE TRANSPORTATION CORP | | | SCAC4 |
| 15 | PTCC | PITTMAN CONSTRUCTION COMPANY | | | SCAC4 |
| 16 | PTCE | PETRO CARRIERS INC | | | SCAC4 |
| 17 | PTCG | PETERSON CARTAGE CO | | | SCAC3 |
| 18 | PTCI | PINE TIMBER CO INC | | | SCAC3 |
| 19 | PTCJ | PRIORITY ONE TRANSPORT CORP | | | SCAC3 |
| 20 | PTCJ | PRITCHARD, CAROL J | | | SCAC4 |
| 21 | PTCL | PORT CITY LEASING | | | SCAC3 |
| 22 | PTCM | PRO-TECH ELECTRONIC MOVERS | | | SCAC3 |
| 23 | PTCM | PRINTERY COMMUNICATIONS INC | | | SCAC4 |
| 24 | PTCN | PRODUCT TRANSPORT CORPORATION | | | SCAC3 |
| 25 | PTCO | PURE TRANSPORTATION COMPANY | | | SCAC3 |
| 26 | PTCP | POLANC TRUCKING INC | | | SCAC4 |
| 27 | PTCQ | PERIMETER TRANSPORTATION CO INC | | | SCAC4 |
| 28 | PTCS | PETROLEUM CARRIERS INC | | | SCAC4 |
| 29 | PTCT | PARTCO TRUCKING CO INC | | | SCAC3 |
| 30 | PTCU | MAMMOET EUROPE BV | | NL | BIC |
| 31 | PTCU | MAMMOET EUROPE BV | | | SCAC4 |
| 32 | PTCV | PORT CANAVERAL TOWING INC | | | SCAC3 |
| 33 | PTCW | PORT CITY COMMERCIAL WAREHOUSE | | | SCAC3 |
| 34 | PTCX | Texas Petrochemicals Corp. | added 1/1985; added 10/1986 | | NAKINA |
| 35 | PTCX | Petro-Tex Chemical Corp. | added 1/1975; 1/1975-1/1980; eliminated 1/1985 | | NAKINA |
| 36 | PTCX | Peoples Transportation Co. | added 1/1964; 7/1965; eliminated 7/1966 | | NAKINA |
| 37 | PTCX | Poultry Transit Co., Inc. | 1/1950 | | NAKINA |
| 38 | PTCX | Poultry Transit Co. | 1/1945-4/1947 | | NAKINA |
| 39 | PTCX | Peoples Transportation Co. | 7/65; eliminated 7/66 | | NRHS |
| 40 | PTCX | Petro-Tex Chemical Corp. | added 1/75; 1/75-1/80; eliminated 1/85 | | NRHS |
| 41 | PTCX | Texas Petrochemicals Corp. | added 1/85; added 10/86 | | NRHS |
| 42 | PTCX | *POULTRY TRANSIT CO., INC. | | | PWRC |
| 43 | PTCX | *PEOPLES TRANSPORTATION CO. | | | PWRC |
| 44 | PTCX | *TEXAS PETROCHEMICALS CORP. [PETRO-TEX CHEMICAL CORP.] | | | PWRC |
| 45 | PTCX | PEOPLES TRANSPORTATION CO | | | SCAC3 |
| 46 | PTCY | PRITCHETT TRUCKING COMPANY INC | | | SCAC3 |
| 47 | PTCY | PATRON | | | SCAC4 |
| 48 | PTCZ | PORT CONTINENTAL | | | PWRC |
