| 4101 | PIAS | PINELAND FARMS LTD | | | SCAC4 |
| 4102 | PIAT | PICK-A-TREAT INC | | | SCAC3 |
| 4103 | PIAU | TRANSPORTS PIALLA | | | SCAC4 |
| 4104 | PIBA | PIONEER NAVIGATION LTD | | | SCAC4 |
| 4105 | PIBC | PACGRAN INC | | | SCAC4 |
| 4106 | PIBD | PINE BELT DISTRIBUTORS INC | | | SCAC3 |
| 4107 | PIBL | PINE BLUFF WAREHOUSE CO | | | SCAC3 |
| 4108 | PIBL | PINE BLUFF TRUCK DRIVING SCHOOL INC | | | SCAC4 |
| 4109 | PIBM | PIBOMULTI | | | SCAC4 |
| 4110 | PIBO | PIEDMONT DISTRIBUTION CENTER | | | SCAC3 |
| 4111 | PIBT | PITRE BROS TRANSFER, INC | | | SCAC3 |
| 4112 | PIBT | PHILS TRANSPORT INC | | | SCAC4 |
| 4113 | PIC | Pacific Airlines Co. Ltd. | IATA: BL, Callsign: Pacific Express, IATA Prefix: 550, Name changed to Jetstar Pacific w.e.f. 23 May 2008. | VN | AVCODES |
| 4114 | PIC | Jetstar Pacific Airlines Co. Ltd. | IATA: BL, Callsign: Pacific Express, IATA Prefix: 550, Name changed to Pacific Airlines Co. Ltd. Name changed from Pacific Airlines Co. Ltd. w.e.f. 23 May 2008. | VN | AVCODES |
| 4115 | PIC | Pacific Airlines Co. Ltd. | IATA: BL, Callsign: Pacific Express, IATA Prefix: 550, Name changed from Jetstar Pacific Airlines Co. Ltd. and previously from Pacific Airlines Co. Ltd. w.e.f. 23 May 2008. | VN | AVCODES |
| 4116 | PIC | Pacific Airlines | IATA: BL | | ICAO1 |
| 4117 | PICB | PICORP TRANSPORT INC | | | SCAC3 |
| 4118 | PICB | PICORP INC BALTIMORE | | | SCAC4 |
| 4119 | PICC | PICON TRANSPORTATION INC | | | SCAC3 |
| 4120 | PICC | PROLOGIC INC | | | SCAC4 |
| 4121 | PICE | PICKENS ENTERPRISES INC | | | SCAC3 |
| 4122 | PICE | PICKENS ENTERPRISES INC | | | SCAC4 |
| 4123 | PICF | PITTS CARTAGE INC | | | SCAC3 |
| 4124 | PICF | P I XPRESS INC | | | SCAC4 |
| 4125 | PICG | PICKERING, ORAL G | | | SCAC3 |
| 4126 | PICH | PICHE, ALAIN TRANSPORT INC | | | SCAC4 |
| 4127 | PICH | Pichenot Bouillé | | F | TRAFFIC |
| 4128 | PICI | PANICI TRUCKING | | | SCAC3 |
| 4129 | PICI | PENTAGON LOGISTICS INC | | | SCAC4 |
| 4130 | PICJ | PHAETHON INTERNATIONAL COMPANY SA | | | SCAC4 |
| 4131 | PICJ | Jetstar Pacific | | VDR | TRAFFIC |
| 4132 | PICK | The Pickens R.R. Co. | added 7/1973; 1/1975-1/1980; eliminated 10/1992; eliminated 10/1993; 1/1994 (not listed); eliminated 1/1995; 7/2000-7/2005 | | NAKINA |
| 4133 | PICK | The Pickens R.R. Co. | added 7/73; 1/75-1/80; eliminated 10/92; eliminated 10/93; 1/94; eliminated 1/95; 7/2000 | | NRHS |
| 4134 | PICK | PICKENS RAILWAY CO. | | | PWRC |
| 4135 | PICK | Pickens Railroad | | | RSRV |
| 4136 | PICK | PICKENS RAILROAD COMPANY | | | SCAC3 |
| 4137 | PICK | PICKENS RAILWAY COMPANY | | | SCAC4 |
| 4138 | PICK | Pickens Railway | | USA | TRAFFIC |
| 4139 | PICL | PIONEER CARLOADING COMPANY (DIV OF | | | SCAC3 |
| 4140 | PICL | PIONEER CARLOADING COMPANY (DIV OF | | | SCAC4 |
| 4141 | PICM | PICKELNER, MORRIS | | | SCAC3 |
| 4142 | PICM | PREMIER FREIGHT INC | | | SCAC4 |
| 4143 | PICN | PICKETT TRUCKING | | | SCAC3 |
| 4144 | PICO | PIERCE & SON TRUCKING | | | SCAC3 |
| 4145 | PICO | PRAIRIE INTERNATIONAL CONTAINER & D | | | SCAC4 |
| 4146 | PICP | PRINCETON INDUSTRIES CORP, P I C | | | SCAC3 |
| 4147 | PICP | PLANES MOVING & STORAGE COMPANY OF | | | SCAC4 |
| 4148 | PICQ | PICKENS-KANE MOVING & STORAGE CO | | | SCAC3 |
| 4149 | PICS | PIC | | | SCAC4 |
| 4150 | PICT | PICO TRANSPORTATION CO INC | | | SCAC3 |
| 4151 | PICU | AUTOTRASPORTI PICCININI S.R.L. | | I | BIC |
| 4152 | PICU | PICKFORDS REMOVALS LTD | | | PWRC |
| 4153 | PICU | Pickfords Removals Limited | | | RSRV |
| 4154 | PICU | PICKFORDS REMOVALS LTD | | | SCAC3 |
| 4155 | PICU | AUTOTRASPORTI PICCININI S A S | | | SCAC4 |
| 4156 | PICW | PIC-WALSH FREIGHT CO | | | PWRC |
| 4157 | PICW | PLASMA INNOVATION COOKWARE INC | | | SCAC4 |
| 4158 | PICX | Pioneer Ice Cream Division, The Borden Corp. | 1/1950 | | NAKINA |
| 4159 | PICX | The Penn Iron & Coal Co. | 8/1920-7/1923 | | NAKINA |
| 4160 | PICX | *PENN IRON & COAL CO. | | | PWRC |
| 4161 | PICX | *PIONEER ICE CREAM DIV., THE BORDON CORP. | | | PWRC |
| 4162 | PICX | TRINITY MANUFACTURING INC | | | SCAC4 |
| 4163 | PICY | PERRY ICE CREAM COMPANY INC | | | SCAC3 |
| 4164 | PICZ | PLYMOUTH INDUSTRY COMPLEX | | | PWRC |
| 4165 | PIDB | PIERSON DISTRIBUTING | | | SCAC3 |
| 4166 | PIDB | PILLETTE TRANSFER STATION LTD | | | SCAC4 |
| 4167 | PIDE | PRIDE ENTERPRISES | | | SCAC3 |
| 4168 | PIDI | PIONEER DELIVERY SERVICE | | | SCAC3 |
| 4169 | PIDI | PHOENIX INTERACTIVE DESIGN INC | | | SCAC4 |
| 4170 | PIDL | PIER DELIVERIES INC | | | SCAC3 |
| 4171 | PIDL | PIONEER TRANSPORTATION LLC | | | SCAC4 |
| 4172 | PIDM | PLATT & SON INC | | | SCAC4 |
| 4173 | PIDN | PACIFIC ISLE DELIVERY INC | | | SCAC3 |
| 4174 | PIDN | PIRTLE, DANNY NURSERY INC | | | SCAC4 |
| 4175 | PIDO | PULIDO'S TOWING | | | SCAC4 |
| 4176 | PIDS | PIONEER DRIVER SERVICES INC | | | SCAC3 |
| 4177 | PIDS | PRIEFERT LOGISTICS | | | SCAC4 |
| 4178 | PIDT | PITNER, DALE TRUCKING | | | SCAC3 |
| 4179 | PIDT | PITNER, DALE TRUCKING | | | SCAC4 |
| 4180 | PIDU | PACIFIC INTERNATIONAL LINES (PTE) LTD | | SGP | BIC |
| 4181 | PIDV | PIO DELIVERY | | | SCAC3 |
| 4182 | PIE | Air South West | Callsign: Pirate, Ceased operations | GB | AVCODES |
| 4183 | PIE | Air South West | | | ICAO1 |
| 4184 | PIEC | PACIFIC INTERMOUNTAIN EXPRESS | | | PWRC |
| 4185 | PIEC | PIERCE NATIONAL INC | | | SCAC4 |
| 4186 | PIED | PIEDMONT EXPRESS SERVICES | | | SCAC4 |
| 4187 | PIEE | PIONEER EXPRESS INC | | | SCAC3 |
| 4188 | PIEG | PIER TRUCKING CORPORATION | | | SCAC4 |
| 4189 | PIEH | PIEHL, H TRANSFER COMPANY | | | SCAC3 |
| 4190 | PIEH | PIEHL, H TRANSFER | | | SCAC4 |
| 4191 | PIEJ | PIERCE, J F & ASSOCIATES | | | SCAC3 |
| 4192 | PIEK | PIONEER EXPRESS | | | SCAC3 |
| 4193 | PIEN | PIERSON, J W CO | | | SCAC4 |
| 4194 | PIEO | PRIETO & SON TRANSPORTATION INC | | | SCAC3 |
| 4195 | PIEO | PINE LAND FARMS LTD | | | SCAC4 |
| 4196 | PIEP | PIER EXPRESS INC | | | SCAC4 |
| 4197 | PIEQ | PIEDMONT MOVERS INCORPORATED | | | SCAC3 |
| 4198 | PIES | PIER SERVICE | | | SCAC3 |
| 4199 | PIESBERG | Piesberger Steinindustrie | | D | TRAFFIC |
| 4200 | PIEV | PINSON EXPRESS INC | | | SCAC3 |
