| 301 | PAGT | PROMOTORA AGRICOLA EL TORO S A DE C | | | SCAC4 |
| 302 | PAGU | PAGANELLA SPA | | I | BIC |
| 303 | PAGU | PAGANELLA SPA | | | SCAC4 |
| 304 | PAGV | PAGE AVJET CORP | | | SCAC3 |
| 305 | PAGW | PAN AMERICAN GRAIN COMPANY | | | SCAC4 |
| 306 | PAGX | Planta Almacenadora de Gas, S.A. | added 1/1956; 10/1957-10/1966; eliminated 4/1969 | | NAKINA |
| 307 | PAGX | Planta Almacenadora de Gas, S.A. | 10/57-10/66; eliminated 4/69 | | NRHS |
| 308 | PAGX | PLANTA ALMACENADORA DE GAS, SA | | | PWRC |
| 309 | PAGX | PLANTA ALMACENADORA DE GAS, S A | | | SCAC3 |
| 310 | PAGY | PIT, ANTHONY & LAGOON INC | | | SCAC4 |
| 311 | PAH | Panorama Air Tour, Inc. | Callsign: Lani, | USA | AVCODES |
| 312 | PAH | Panorama Air Tour | | | ICAO1 |
| 313 | PAHA | PANHANDLE TRANSFER CO | | | SCAC3 |
| 314 | PAHA | PANADERIA CHIHUAHUA | | | SCAC4 |
| 315 | PAHC | PARRISH, H. C., TRUCK SERVICE | | | SCAC3 |
| 316 | PAHD | PACIFIC HIDE AND FUR DEPOT | | | SCAC3 |
| 317 | PAHF | PAN AMERICAN FORWARDING CO INC | | | SCAC3 |
| 318 | PAHI | P & H TRANSPORTATION INC | | | SCAC3 |
| 319 | PAHL | PATH TRUCK LINES INC | | | SCAC3 |
| 320 | PAHS | PARKHURST TRUCKING INC | | | SCAC3 |
| 321 | PAHT | PACIFIC HIGHWAY TRANSPORT, INC | | | SCAC3 |
| 322 | PAHU | PORT AUTONOME DU HAVRE | | | SCAC4 |
| 323 | PAHW | PACIFIC HAWAIIAN TERMINALS, INC | | | SCAC3 |
| 324 | PAHZ | PACER STACKTRAIN | | | SCAC4 |
| 325 | PAI | Paradise Airways, Inc. | Callsign: Sea Ray, | USA | AVCODES |
| 326 | PAI | Piedmont Airlines, Inc. | IATA: PI, Callsign: Piedmont, Merged into UsAir | USA | AVCODES |
| 327 | PAI | Paradise Airways | | | ICAO1 |
| 328 | PAIA | PAMPLIN, GARY TRUCKING | | | SCAC3 |
| 329 | PAIA | PUEBLO AMIGO IMPORT | | | SCAC4 |
| 330 | PAIB | PACIFIC | | | SCAC4 |
| 331 | PAIC | PACIFIC INLAND TRANSPORT INC | | | SCAC3 |
| 332 | PAID | PAINE, DENNIS SERVICE CO | | | SCAC3 |
| 333 | PAID | PACIFIC ATLANTIC LINE (ISRAEL) LTD | | | SCAC4 |
| 334 | PAIE | PAM'S, THE DELIVERY SERVICE | | | SCAC3 |
| 335 | PAIE | PAMS, THE DELIVERY SERVICE | | | SCAC4 |
| 336 | PAIF | PILOT AIR FREIGHT | | | SCAC4 |
| 337 | PAII | PAN AM INT'L INC | | | SCAC3 |
| 338 | PAIK | PAI TRUCKING | | | SCAC4 |
| 339 | PAIL | PACIFIC INLAND NAVIGATION CO INC, | | | SCAC3 |
| 340 | PAIL | PATTERSON INDUSTRIES (CANADA) LIMIT | | | SCAC4 |
| 341 | PAIM | PACIFIC INTERMODAL TRANSPORT INC | | | SCAC3 |
| 342 | PAIN | PAINE-WOODFIN EXPRESS CO, INC | | | SCAC3 |
| 343 | PAIP | PRO AMERICA INC | | | SCAC4 |
| 344 | PAIQ | PAILLE EXPRESS INC | | | SCAC3 |
| 345 | PAIS | PAISLEY TRUCKING INC | | | SCAC3 |
| 346 | PAIS | PAISLEY TRUCKING INC | | | SCAC4 |
| 347 | PAIV | PACITTI, STEVE INC | | | SCAC4 |
| 348 | PAIX | Pol-Tex International, Division of Poly-America | added 10/2001; 7/2005; eliminated 4/2006 | | NAKINA |
| 349 | PAIX | Poly-America, Inc. | added 1/1991; 1/1994; eliminated 4/1994; 7/2000 (not listed) | | NAKINA |
| 350 | PAIX | Poly-America, Inc. | added 1/91; 1/94; eliminated 4/94; 7/2000 | | NRHS |
| 351 | PAIX | POL-TEX INTERNATIONAL, DIV. POLY-AMERICA, INC. | | | PWRC |
| 352 | PAIX | Pol-Tex Internation Division of Poly-America | | | RSRV |
| 353 | PAIX | POLY-AMERICA, INC | | | SCAC4 |
| 354 | PAJ | Aliparma S.r.l. | Callsign: Airparma, Callsign changed to Aliparma. | I | AVCODES |
| 355 | PAJ | Aliparma S.r.l. | Callsign: Aliparma, Callsign changed from Airparma. | I | AVCODES |
| 356 | PAJ | Aliparma | | | ICAO1 |
| 357 | PAJA | PARK, JAMES A | | | SCAC3 |
| 358 | PAJB | P & J TOURS INC | | | SCAC3 |
| 359 | PAJC | PAJO TRANSPORT CO INC | | | SCAC3 |
| 360 | PAJE | PAJE TRUCKING INC | | | SCAC4 |
| 361 | PAJI | PAJA INC | | | SCAC3 |
| 362 | PAJT | PALMER TRUCKING, JIM | | | SCAC3 |
| 363 | PAJT | PALMER, JIM TRUCKING | | | SCAC4 |
| 364 | PAJU | UAB Pajurio Autobusai | City: Klaipeda | LT | TRAFFIC |
| 365 | PAK | Pacific Alaska Airlines | Callsign: Pacific Alaska, | USA | AVCODES |
| 366 | PAK | Pacific Alaska Airlines | | | ICAO1 |
| 367 | PAKA | PEAK TRANSPORT | | | SCAC4 |
| 368 | PAKB | PEACE ARCH TRUCKING SERVICE INC | | | SCAC4 |
| 369 | PAKC | PARK CITY STORAGE & VAN COMPANY | | | SCAC3 |
| 370 | PAKE | PARKER, ED TRUCKING CO INC | | | SCAC3 |
| 371 | PAKF | PACIFIC ALASKA FORWARDERS | | | SCAC3 |
| 372 | PAKG | PACKAGE EXPRESS | | | SCAC3 |
| 373 | PAKH | PACIFIC ALASKA TRANSPORT, INC | | | SCAC3 |
| 374 | PAKH | PACIFIC ALASKA FREIGHTWAYS INC | | | SCAC4 |
| 375 | PAKI | P & K MATERIALS INC | | | SCAC3 |
| 376 | PAKI | POLYTANK INC | | | SCAC4 |
| 377 | PAKJ | PATRICKS BODY SHOP INC | | | SCAC3 |
| 378 | PAKJ | PANKO, JOHN M | | | SCAC4 |
| 379 | PAKK | PARK TRUCKING | | | SCAC3 |
| 380 | PAKL | PACKERLAND TRANSPORT INC | | | SCAC3 |
| 381 | PAKL | Przewozy Autokarowe Kazimierz Lisinski | | PL | TRAFFIC |
| 382 | PAKN | PARKINSON, T & T/FRANK O WRIGHT | | | SCAC3 |
| 383 | PAKN | PAK TRUCKING INC | | | SCAC4 |
| 384 | PAKP | PACK TRANSPORTATION SERVICES INC | | | SCAC3 |
| 385 | PAKP | PACE TRANSPORTATION | | | SCAC4 |
| 386 | PAKQ | PARKER TRUCKING COMPANY | | | SCAC3 |
| 387 | PAKS | PAK TRANSPORT, INC | | | SCAC3 |
| 388 | PAKU | PACORINI, B SPA CASA DI SPEDIZIONI | | | SCAC3 |
| 389 | PAKU | SHARIF OXYGEN (PUT) LTD | | | SCAC4 |
| 390 | PAKV | PARKER, F V AND SONS INC | | | SCAC3 |
| 391 | PAKW | PACIFIC ALASKA FUEL SERVICES INC | | | SCAC3 |
| 392 | PAL | Philippine Airlines, Inc. | IATA: PR, Callsign: Philippine, IATA Prefix: 079, Name changed from Philippine Air Lines, Inc. (PAL). ICAO callsgin changed from Filairline | RP | AVCODES |
| 393 | PAL | Philippine Air Lines, Inc. (PAL) | IATA: PR, Callsign: Filairline, IATA Prefix: 079, Name changed to Philippine Airlines, Inc. ICAO Callsign changed to Philippine | RP | AVCODES |
| 394 | PAL | Philippine Airlines | IATA: PR | | ICAO1 |
| 395 | PAL | Paducah & Louisville Ry., Inc. | added 10/1986; 1/1994-7/2005 | | NAKINA |
| 396 | PAL | Paducah & Louisville Ry., Inc. | added 10/86; 1/94-7/2000 | | NRHS |
| 397 | PAL | PADUCAH & LOUISVILLE RAILWAY LLC | | | PWRC |
| 398 | PAL | Paducah and Louisville Railway | | | RSRV |
| 399 | PAL | PADUCAH & LOUISVILLE RAILWAY | | | SCAC4 |
| 400 | PAL | Paducah & Louisville | | USA | TRAFFIC |
