| 1 | PEC | Pacific East Asia Cargo Airlines, Inc. | IATA: Q8, Callsign: Pac-East Cargo, IATA Prefix: 505, Ceased operations on 30 December 2010. Designator Q8 reinstated by IATA | RP | AVCODES |
| 2 | PEC | Pacific East Asia Cargo Airlines, Inc. | IATA: 4P, Callsign: Pac-East Cargo, Founded on 09 October 1990. | RP | AVCODES |
| 3 | PEC | ProJETS Aviation Senegal SAS | Callsign: Pass Aviation, | SN | AVCODES |
| 4 | PEC | Pacific East Asia Cargo Airlines | IATA: Q8 | | ICAO1 |
| 5 | PEC | PHILADELPHIA ELECTRIC CO. | | | PWRC |
| 6 | PEC | Parkeisenbahn Cottbus | | D | TRAFFIC |
| 7 | PECC | PENNER, JACOB ERNEST | | | SCAC4 |
| 8 | PECD | PENINSULA CITIES DELIVERY | | | SCAC3 |
| 9 | PECE | PACKAGE EXPRESS CO. OF ELGIN | | | SCAC3 |
| 10 | PECE | P E T EXPRESS | | | SCAC4 |
| 11 | PECG | PETROLEUM CARGO SERVICE INC | | | SCAC3 |
| 12 | PECH | PEACH STATE TRUCK BROKERS INC | | | SCAC3 |
| 13 | PECH | PEACH STATE TRUCK LINES INC | | | SCAC4 |
| 14 | PECH | Parkeisenbahn Chemnitz | | D | TRAFFIC |
| 15 | PECI | PERRYS COURIER SERVICE INC | | | SCAC3 |
| 16 | PECI | PECINA RODRIGUEZ, JAVIER | | | SCAC4 |
| 17 | PECK | PEGASUS ENVIRONMENTAL CO | | | SCAC4 |
| 18 | PECL | PERFECT COURIER LTD | | | SCAC3 |
| 19 | PECL | PERHAM, CLIFFORD W INC | | | SCAC4 |
| 20 | PECM | PETCHEM INC. | | | SCAC3 |
| 21 | PECN | PETCO INC INTERSTATE | | | SCAC3 |
| 22 | PECO | PECORARO, P L TRUCKING INC | | | SCAC3 |
| 23 | PECO | PROMOECO SA DE CV | | | SCAC4 |
| 24 | PECP | PENEREX CARPET SERVCES INC | | | SCAC3 |
| 25 | PECP | P & E MANUFACTURING LTD | | | SCAC4 |
| 26 | PECQ | PENCO CORP | | | SCAC3 |
| 27 | PECR | PETROLEUM CARRIER INC | | | SCAC4 |
| 28 | PECT | PERRON, E & C TRUCKING INC | | | SCAC4 |
| 29 | PECU | PEC ENGINEERING | | | SCAC3 |
| 30 | PECV | PRIME CANADA LIMITED | | | SCAC4 |
| 31 | PECX | General Electric Rail Services Corp. | 7/2005 (not listed) | | NAKINA |
| 32 | PECX | General Electric Railcar Services Corp. | 1/1994 (not listed); 7/2000 (not listed) | | NAKINA |
| 33 | PECX | Pekin Energy Co. | added 1/1983; eliminated 7/1984 | | NAKINA |
| 34 | PECX | Pioneer Equipment Co. | 1/1943-1/1952; eliminated 1/1954 | | NAKINA |
| 35 | PECX | Pioneer Equipment Co. | Jan-52 | | NRHS |
| 36 | PECX | Pekin Energy Co. | added 1/83; eliminated 7/84 | | NRHS |
| 37 | PECX | General Electric Railcar Services Corp. | Jan-94 | | NRHS |
| 38 | PECX | General Electric Rail Services Corp. | Jul-00 | | NRHS |
| 39 | PECX | *PIONEER EQUIPMENT CO. | | | PWRC |
| 40 | PECX | +GENERAL ELECTRIC RAILCAR SERVICES CORP. (PEKIN ENERGY COMPANY LESSOR) | | | PWRC |
| 41 | PECX | Pekin Energy | | | RSRV |
| 42 | PECY | PETRUCELA & COMPANY | | | SCAC3 |
| 43 | PECY | PINATAS ETC COMPANY | | | SCAC4 |
| 44 | PECZ | PREMIER ELKHORN COAL | | | PWRC |
