| 8201 | PRN | Princess Air Plc | IATA: 8Q, Callsign: Whisperjet, Ceased operations on 27 February 1991. | GB | AVCODES |
| 8202 | PRN | Petronord-Avia, Air Company | Callsign: Petronord, | RUS | AVCODES |
| 8203 | PRN | Pirinair Express | Callsign: Pirinair Express, | E | AVCODES |
| 8204 | PRN | Pirinair Express | | | ICAO1 |
| 8205 | PRNB | PRONTO BUSINESS COURIER INC | | | SCAC3 |
| 8206 | PRNC | PRINCE CORP | | | SCAC3 |
| 8207 | PRND | PRENDAS S A DE C V | | | SCAC4 |
| 8208 | PRNF | PRINCL FREIGHT LINES INC | | | SCAC3 |
| 8209 | PRNG | PRATT TRUCKING | | | SCAC3 |
| 8210 | PRNH | PRN TRANSPORT LTD | | | SCAC4 |
| 8211 | PRNI | PARTNERS TRANSPORTATION INC | | | SCAC3 |
| 8212 | PRNL | PIPE RENEWAL SERVICE INC | | | SCAC3 |
| 8213 | PRNL | PURNELL FURNITURE SERVICE INC | | | SCAC4 |
| 8214 | PRNM | PERRON, TIMON TRUCKING INC | | | SCAC4 |
| 8215 | PRNN | PRYOR & SONS | | | SCAC3 |
| 8216 | PRNN | PRONAUTIC CUSTOM YACHT INTERIORS | | | SCAC4 |
| 8217 | PRNO | PARNELL OIL CO INC | | | SCAC4 |
| 8218 | PRNP | PRINTPACK INC | | | SCAC4 |
| 8219 | PRNQ | PRINCIPAL LINES LTD. | | | SCAC3 |
| 8220 | PRNR | PRINCE TRANSPORTATION | | | SCAC3 |
| 8221 | PRNS | PRIESTLEY & SONS MOVING & STORAGE | | | SCAC3 |
| 8222 | PRNT | PRINS TRUCKING INC | | | SCAC3 |
| 8223 | PRNT | PRINS TRUCKING INC | | | SCAC4 |
| 8224 | PRNV | PARNON NAVIGATION CORP | | | SCAC3 |
| 8225 | PRNV | PRESTIGE NAVIGATION CORP | | | SCAC4 |
| 8226 | PRNW | PRESSON AND WARTHON INC | | | SCAC3 |
| 8227 | PRNY | PARNEY TRUCKING | | | SCAC3 |
| 8228 | PRO | Propair, Inc. | Callsign: Propair, | CDN | AVCODES |
| 8229 | PRO | Propair, Inc. | IATA: 6P, Callsign: Propair, Designator recalled by IATA | CDN | AVCODES |
| 8230 | PRO | Propair | | | ICAO1 |
| 8231 | PROBO | PROBO TRANS BEROUN | | CZ | TRAFFIC |
| 8232 | PROC | PROCTOR EXPRESS INC | | | SCAC3 |
| 8233 | PROC | PROCAN EXPRESS INC | | | SCAC4 |
| 8234 | PROD | PRODUCE SUPPLY COMPANY | | | SCAC3 |
| 8235 | PROD | PRODUCTORA AGRICOLA INDUSTRIAL DEL | | | SCAC4 |
| 8236 | PROE | PRODUCE CARRIER | | | SCAC3 |
| 8237 | PROE | PROEXI LOGISTIC SA DE CV | | | SCAC4 |
| 8238 | PROF | PROTECTIVE FOOD SERVICES INC | | | SCAC3 |
| 8239 | PROG | PROGRESSIVE TRANSPORTATION COMPANY | | | SCAC3 |
| 8240 | PROG | PROGRESS BULK CARRIERS LTD | | | SCAC4 |
| 8241 | PROH | PROUD, KEITH E, MOVING & STORAGE IN | | | SCAC3 |
| 8242 | PROI | PERONTI TRUCKING CO INC | | | SCAC3 |
| 8243 | PROK | PRO EXPRESS INC | | | SCAC3 |
| 8244 | PROL | PENROD, LARRY TRUCKING | | | SCAC3 |
| 8245 | PROL | PRO LOGISTICS INC | | | SCAC4 |
| 8246 | PROM | PROMPT MOTOR LINES, INC | | | SCAC3 |
| 8247 | PROM | PROMET Sp. z o.o. | | PL | VKM |
| 8248 | PRON | PRO TRANSIT INC | | | SCAC3 |
| 8249 | PRON | PRO-MEX | | | SCAC4 |
| 8250 | PROO | PRO EXPRESS, Pro Express, INC | | | SCAC3 |
| 8251 | PROP | PROCOPIO BROTHERS TRUCKING COMPANY | | | SCAC3 |
| 8252 | PROQ | PRONTO DELIVERY SERVICE | | | SCAC3 |
| 8253 | PROQ | PRO-TRAINER INC | | | SCAC4 |
| 8254 | PROR | PRODUCERS SERVICE INC | | | SCAC3 |
| 8255 | PROR | PROFICIENT TRANSPORT INCORPORATED | | | SCAC4 |
| 8256 | PROS | PROTOS SHIPPING, INC. | | | SCAC3 |
| 8257 | PROSE | PROSE AG | | CH | VKM |
| 8258 | PROT | PRO TRANSPORT INC | | | SCAC3 |
| 8259 | PROT | Protor sp. z o.o. sp. k. | | PL | TRAFFIC |
| 8260 | PROT | PROTOR S.A. | | PL | VKM |
| 8261 | PROU | PRO-TRANS A/S | | DK | BIC |
| 8262 | PROV | PROVOST BULK TRANSPORT INC | | | SCAC3 |
| 8263 | PROV | PROVIDER EXPRESS LTD | | | SCAC4 |
| 8264 | PROV | Chemins de fer de Provence | Real: CP | F | TRAFFIC |
| 8265 | PROW | PRO WEST CARTAGE TRANSPORT | | | SCAC3 |
| 8266 | PROX | Procor Ltd. | added 1/1974; 1/1975-7/2005 | | NAKINA |
| 8267 | PROX | Procor Ltd. | added 1/74; 1/75-7/2000 | | NRHS |
| 8268 | PROX | PROCOR LTD. | | | PWRC |
| 8269 | PROX | PROCOR LIMITED | | | PWRC |
| 8270 | PROX | Procor | | | RSRV |
| 8271 | PROX | PROCOR LIMITED | | | SCAC4 |
| 8272 | PROX | Procor Ltd. | | USA | TRAFFIC |
| 8273 | PROY | PRO-TRANS | | | SCAC3 |
| 8274 | PRP | PRT Aviation, S.L. | Callsign: Pronto, | E | AVCODES |
| 8275 | PRP | PRT Aviation | | | ICAO1 |
| 8276 | PRPA | PRONTO PARCEL | | | SCAC3 |
| 8277 | PRPB | PRODUCE TRANSPORT LLC | | | SCAC4 |
| 8278 | PRPC | PROSPECT CARTAGE COMPANY INC | | | SCAC3 |
| 8279 | PRPD | PREFERRED TRANSPORT&DISTRIBUTION, INC | | | SCAC3 |
| 8280 | PRPD | PREFERRED TRANSPORT & DISBRIBUTION | | | SCAC4 |
| 8281 | PRPE | PROFFER PRODUCE EXPRESS INC | | | SCAC3 |
| 8282 | PRPE | PROFFER PRODUCE EXPRESS INC | | | SCAC4 |
| 8283 | PRPG | PATRIA PACKAGING INC | | | SCAC3 |
| 8284 | PRPI | PREMIUM PROCESSORS INC | | | SCAC4 |
| 8285 | PRPJ | PRP LOGISTICS INC | | | SCAC4 |
| 8286 | PRPL | PURPLE SAGE TRUCKING | | | SCAC4 |
| 8287 | PRPM | PERMIAN PETROLEUM CO | | | SCAC3 |
| 8288 | PRPN | PROPANE TRANSPORT, INC | | | SCAC3 |
| 8289 | PRPN | PROPANE TRANSPORT, INC | | | SCAC4 |
| 8290 | PRPQ | PRISE PIGGYBACK SERVICE | | | SCAC3 |
| 8291 | PRPQ | PORT-PASS INC | | | SCAC4 |
| 8292 | PRPR | PRO PETROLEUM INC | | | SCAC4 |
| 8293 | PRPS | PARAY EXPRESS | | | SCAC4 |
| 8294 | PRPT | PRUETT PETROLEUM | | | SCAC4 |
| 8295 | PRPV | PRECISION TRANSPORT SERVICE INC | | | SCAC3 |
| 8296 | PRPW | P R ENTERPRISE INC | | | SCAC4 |
| 8297 | PRPX | Pacific Railroad Preservation Association | 7/2005 | | NAKINA |
| 8298 | PRPX | Union Tank Car Co. | added 10/1953; 7/1954-10/1957; eliminated 7/1958 | | NAKINA |
| 8299 | PRPX | Transit Co., Ltd. | 7/1930-1/1952; eliminated 10/1953 | | NAKINA |
| 8300 | PRPX | Transit Co., Ltd. | 4/38-1/52; eliminated 10/53 | | NRHS |
