| 1 | PRL | Pearl Air Pvt. Ltd. | Callsign: Pearl Line, | PK | AVCODES |
| 2 | PRL | Pearl Air | | | ICAO1 |
| 3 | PRL | East Penn Railroad LLC | added 10/2007 | | NAKINA |
| 4 | PRL | Penn Eastern Rail Lines, Inc. | added 4/1998; 7/2000-7/2005; eliminated 10/2007 | | NAKINA |
| 5 | PRL | Penn Eastern Rail Lines, Inc. | added 4/98; 7/2000 | | NRHS |
| 6 | PRL | EAST PENN RAILWAY [PENN EASTERN RAIL LINES INC.] | | | PWRC |
| 7 | PRL | Penn Eastern Rail Lines (East Penn Railway) | | | RSRV |
| 8 | PRL | PENN EASTERN RAIL LINES INC | | | SCAC4 |
| 9 | PRL | Penn Eastern Rail Lines, Inc. | | USA | TRAFFIC |
| 10 | PRLA | PUROLATOR COURIER LTD | | | SCAC3 |
| 11 | PRLA | PUROLATOR COURIER LTD | | | SCAC4 |
| 12 | PRLB | PRICE, LAMAR B TRUCKING | | | SCAC3 |
| 13 | PRLB | PRIME LUBE INC | | | SCAC4 |
| 14 | PRLC | PARRISH LEASING CO | | | SCAC3 |
| 15 | PRLC | PARRISH LEASING CO | | | SCAC4 |
| 16 | PRLD | PARMLEY, DAVID L | | | SCAC3 |
| 17 | PRLD | PEDREGON RACING LLC | | | SCAC4 |
| 18 | PRLE | PEERLESS CLOTHING INC | | | SCAC4 |
| 19 | PRLG | PRO TRANSPORT AND LEASING INC | | | SCAC3 |
| 20 | PRLI | PRAIRIE LINES INC | | | SCAC3 |
| 21 | PRLI | PATRIOT LINES | | | SCAC4 |
| 22 | PRLJ | PRENTICE, LEE J | | | SCAC3 |
| 23 | PRLJ | PEARL TRUCKING LLC | | | SCAC4 |
| 24 | PRLK | PEARL TRUCKING | | | SCAC3 |
| 25 | PRLK | PEARL TRUCKING | | | SCAC4 |
| 26 | PRLL | PEARL K/S | | | SCAC3 |
| 27 | PRLL | PRECISION ROLLS INC | | | SCAC4 |
| 28 | PRLM | PARR LUMBER CO | | | SCAC3 |
| 29 | PRLN | P & R OIL CO | | | SCAC4 |
| 30 | PRLO | PRELL OHIO | | | SCAC3 |
| 31 | PRLP | PACIFIC ROLLER POWER CORPORATION | | | SCAC3 |
| 32 | PRLQ | PORT LIONS OIL COMPANY | | | SCAC3 |
| 33 | PRLQ | PEARLMAR LIMITED | | | SCAC4 |
| 34 | PRLR | PEERLESS ENTERPRISE OF EVANSTON | | | SCAC3 |
| 35 | PRLR | PROLOG INTERNATIONAL INC (NOVA MARI | | | SCAC4 |
| 36 | PRLS | PEERLESS TRUCKING COMPANY, 4H Mountain Valley Express, INC | | | SCAC3 |
| 37 | PRLS | PEERLESS TRUCKING COMPANY | | | SCAC4 |
| 38 | PRLT | PERRAULT, WILLARD | | | SCAC3 |
| 39 | PRLT | PRIME LINE TRANSPORTATION INC | | | SCAC4 |
| 40 | PRLU | TIANJIN PLC ENTERPRISE CO., LTD. | | PRC | BIC |
| 41 | PRLV | PROVINCIAL VAN LINES LLC | | | SCAC4 |
| 42 | PRLW | PRELLWITZ TRUCKING | | | SCAC3 |
| 43 | PRLW | PRIDE LOGISTICS INC | | | SCAC4 |
| 44 | PRLW | Pennsylvania Railroad Lines West | | USA | TRAFFIC |
| 45 | PRLX | Progress Rail Services Corp. | added 4/2008 | | NAKINA |
| 46 | PRLX | Private Rail Ltd. | 1/1994-7/2005 (not listed) | | NAKINA |
| 47 | PRLX | Priebe Refrigerator Line (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 48 | PRLX | Priebe Refrigerator Line | 7/1932 | | NAKINA |
| 49 | PRLX | Private Rail Ltd. | 1/94-7/2000 | | NRHS |
| 50 | PRLX | *PRIEBE REFRIGERATOR LINE | | | PWRC |
| 51 | PRLX | *PRIVATE RAIL LIMITED | | | PWRC |
| 52 | PRLX | +PROGRESS RAIL SERVICES CORP. | | | PWRC |
| 53 | PRLX | Progress Rail Services Corporation | | | RSRV |
| 54 | PRLX | PROGRESS RAIL SERVICES CORPORATION | | | SCAC4 |
| 55 | PRLY | PAYNE, RICHARD L | | | SCAC3 |
| 56 | PRLY | PRESLEY, S L | | | SCAC4 |
