| 1 | PB | Provincial Airlines | ICAO: PVL, Callsign: Provincial, IATA Prefix: 967, Name changed to PAL Airlines Ltd. w.e.f. 01 June 2016. | CDN | AVCODES |
| 2 | PB | Service des Transports Aériens du Burundi | Callsign: Stabair, | RU | AVCODES |
| 3 | PB | Air Burundi | ICAO: PBU, Callsign: Air Burundi, Designator PB recalled by IATA | RU | AVCODES |
| 4 | PB | PAL Airlines Ltd. | ICAO: PVL, Callsign: Provincial, IATA Prefix: 967, Name changed from Provincial Airlines. w.e.f. 01 June 2016. | CDN | AVCODES |
| 5 | PB | Porterbrook | Porterbrook is one of the three major ROSCOs (ROlling Stock COmpany) in the United Kingdom. Created in 1994 as part of the privatisation of British Rail, it owns around a third of passenger railway locomotives, multiple units and coaching stock running on Network Rail's system which it leases to various train operators. In 1996 it was sold as in a management-employee buyout and subsequently owned by Stagecoach Group until 2000 when it was taken over by the Abbey National bank. | GB | TRAFFIC |
| 6 | PB | Porterbrook Leasing Co. Ltd. | | UK | VKM |
| 7 | PB&NE | PHILADELPHIA, BETHLEHEM & NEW ENGLAND RAILROAD | | | PWRC |
| 8 | PBA | PB Air Company Limited | IATA: 9Q, Callsign: PeeBee Air, IATA Prefix: 543, Ceased operation on 21 December 2009. Designator 9Q* reinstated by IATA | T | AVCODES |
| 9 | PBA | PB Air Company Limited | Callsign: PeeBee Air, Designator 9Q* recalled by IATA | T | AVCODES |
| 10 | PBA | Pilbara Airlines Pty Ltd | Callsign: Pilbara, Planned to start domestic and international serives from Pilbara with A320 or A321. | AUS | AVCODES |
| 11 | PBA | PB Air | IATA: 9Q | | ICAO1 |
| 12 | PBAI | POLAR BEAR TRUCKING INC | | | SCAC4 |
| 13 | PBAL | PACIFIC BASIN AGENCIES LTD | | | SCAC3 |
| 14 | PBAL | PLASTICOS BAJACAL S A DE C V | | | SCAC4 |
| 15 | PBAR | PERFORMANCE BY AIR | | | SCAC3 |
| 16 | PBAR | PIT BULL EXPRESS INC | | | SCAC4 |
| 17 | PBAS | PANERA BREAD AND ST LOUIS BREAD CO | | | SCAC4 |
| 18 | Pbas | Paliva-Bernat a.s. | | CZ | VKM |
| 19 | PBAT | PATTERSON, B A TRUCKING INC | | | SCAC3 |
| 20 | PBAT | PBA TUNDRA SUPPLY LTD | | | SCAC4 |
| 21 | PBAU | ACUGREEN LTD | | | SCAC3 |
| 22 | PBAV | PERCIBALLI CONSTRUCTION CO LTD | | | SCAC4 |
| 23 | PBAY | PREMIER BAY SHIPPING COMPANY LIMITE | | | SCAC4 |
| 24 | PBB | Polizeihubschrauberstaffel Brandenburg | Callsign: Adebar, | D | AVCODES |
| 25 | PBB | Polizeihubschrauberstaffel Brandenburg | | | ICAO1 |
| 26 | PBB | | City: Merseburg | D | TRAFFIC |
| 27 | PBB | BESTGES BAU GMBH | | DE | VKM |
| 28 | PBBX | Ketchikan Pulp Co. | added 10/1968; 4/1970-1/1975; eliminated 10/1977 | | NAKINA |
| 29 | PBBX | P. Ballantine Refrigerator Line (Newark, N.J.) (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 30 | PBBX | Ketchikan Pulp Co. | added 10/68; 4/70-1/75 | | NRHS |
| 31 | PBBX | KETCHIKAN PULP CO. | | | PWRC |
| 32 | PBC | Aerotaxis Paba, S.A. de C.V. | Callsign: Paba, | MEX | AVCODES |
| 33 | PBC | Pittsburg County Ry. | 4/1938-7/1954 | | NAKINA |
| 34 | PBC | Pittsburg County Ry. | 4/38-1/52 | | NRHS |
| 35 | PBC | PITTSBURG COUNTY RAILROAD | | | PWRC |
| 36 | PBC | POZ BRUK sp. z o. o. sp. j. | | PL | VKM |
| 37 | PBCA | PRIMO BULK CARRIERS, INC. | | | SCAC3 |
| 38 | PBCC | PEABODY COAL CO. | | | PWRC |
| 39 | PBCC | PARABRUSH CARRIER SERVICE INC | | | SCAC4 |
| 40 | PBCC | Peabody Coal Company (old) | | USA | TRAFFIC |
| 41 | PBCD | PACIFIC BASIN CONSOLIDATORS | | | SCAC3 |
| 42 | PBCE | PALMENTERE BROTHERS CARTAGE SERVICE | | | SCAC4 |
| 43 | PBCH | PACIFIC BASIN CHARTERING CO | | | SCAC3 |
| 44 | PBCH | PEPPER BROS TRUCKING | | | SCAC4 |
| 45 | PBCI | PRIDMORE BROS CONSTRUCTION INC | | | SCAC3 |
| 46 | PBCJ | PORTABLE CHURCH INDUSTRIES INC | | | SCAC4 |
| 47 | PBCL | PBCL TRUCKING | | | SCAC3 |
| 48 | PBCL | PANOCEANIC BULK CARRIERS LIMITED | | | SCAC4 |
| 49 | PBCO | PABCO FLUID POWER CO | | | SCAC3 |
| 50 | PBCQ | POTTER, B & C TRANSFER | | | SCAC3 |
| 51 | PBCR | PETROBULK CARRIERS A/S | | | SCAC3 |
| 52 | PBCS | POITIER BUS CHARTERING SERVICE INC | | | SCAC3 |
| 53 | PBCT | PATS BELLE CITY TRUCKING INC | | | SCAC3 |
| 54 | PBCW | PACIFIC BULK CARRIERS LTD | | | SCAC4 |
| 55 | PBCX | Tyson Fresh Meats | added 4/2006 | | NAKINA |
| 56 | PBCX | Parker Brothers & Co., Inc. | added 1/1974; 1/1975; eliminated 4/1976 | | NAKINA |
| 57 | PBCX | The Portsmouth By-Product Coke Co. | 7/1923-7/1930 | | NAKINA |
| 58 | PBCX | Parker Brothers & Co., Inc. | added 1/74; 1/75; eliminated 4/76 | | NRHS |
| 59 | PBCX | *PORTSMOUTH BY-PRODUCT COKE CO. | | | PWRC |
| 60 | PBCX | *PARKER BROTHERS & CO., INC. | | | PWRC |
| 61 | PBCX | +TYSON FRESH MEATS | | | PWRC |
| 62 | PBCX | TYSON FRESH MEATS | | | SCAC4 |
| 63 | PBD | Pobeda Airlines LLC | IATA: DP, Callsign: Pobeda, Founded on 16 September 2014. Commenced operations on 01 December 2014. Low cost subsidary of Aeroflot | RUS | AVCODES |
| 64 | PBDL | PRAIRIE ROADBUILDERS LTD | | | SCAC4 |
| 65 | PBDO | PARRY, LAWRENCE M JR | | | SCAC3 |
| 66 | PBDO | PANELLA, B DRAYAGE COMPANY | | | SCAC4 |
| 67 | PBDS | P AND B DELIVERY SERVICE | | | SCAC3 |
| 68 | PBDS | PRIDE BODIES LTD | | | SCAC4 |
| 69 | PBDT | PORTERS BP | | | SCAC4 |
| 70 | PBE | Pfalzbahn Eisenbahnbetriebsgesellschaft mbH | | DE | VKM |
| 71 | PBEA | PARKER BEE APIARIES LTD | | | SCAC4 |
| 72 | PBEI | PUBLIC EXPRESS INC | | | SCAC3 |
| 73 | PBEI | PETKAU BROTHERS EXPRESS INC | | | SCAC4 |
| 74 | PBEL | POLAR BEAR EXPRESS LOGISTICS | | | SCAC4 |
| 75 | PBEQ | PEN BULLET EXPRESS INC | | | SCAC4 |
| 76 | PBF | Pennsylvania Bureau of Forestry | Callsign: Penn-Forest, | USA | AVCODES |
| 77 | PBFC | P B F ENTERPRISES INC | | | SCAC3 |
| 78 | PBFE | PBX INC | | | SCAC3 |
| 79 | PBFF | PACIFIC BASIN FREIGHT FORWARDERS LL | | | SCAC4 |
| 80 | PBFG | PETERSEN BROS FEED & GRAIN INC | | | SCAC3 |
| 81 | PBFL | PRUDHOE BAY FREIGHTLINES INC | | | SCAC3 |
| 82 | PBFL | PUREWAL BLUEBERRY FARMS LTD | | | SCAC4 |
| 83 | PBFO | PACIFIC TRANSPORTATION & WAREHOUSE | | | SCAC3 |
| 84 | PBFR | PINE BLUFFS FEED AND GRAIN TRUCKING | | | SCAC3 |
| 85 | PBFR | PINE BLUFFS FEED AND GRAIN TRUCKING | | | SCAC4 |
| 86 | PBFU | PACIFIC BULK FUEL LIMITED | | NZ | BIC |
| 87 | PBFW | PEABODY FLOWAY INC | | | SCAC3 |
| 88 | PBFX | The CIT Group/Capital Finance, Inc. | added 7/2007 | | NAKINA |
| 89 | PBFX | Tyson Fresh Meats | added 4/2006; eliminated 7/2007 | | NAKINA |
| 90 | PBFX | IBP, Inc. | added 7/1994; 7/2000-7/2005; eliminated 4/2006 | | NAKINA |
| 91 | PBFX | IBP, Inc. | added 7/94; 7/2000 | | NRHS |
| 92 | PBFX | *TYSON FRESH MEATS [TYSON FOODS; IBP, INC.] | | | PWRC |
| 93 | PBFX | +THE CIT GROUP/CAPITAL FINANCE, INC. | | | PWRC |
| 94 | PBFX | IBP (Tyson Foods) | | | RSRV |
| 95 | PBFX | TYSON FRESH MEATS | | | SCAC4 |
| 96 | PBG | Preußen Bahn GmbH | Groß Kreutz | D | privat-bahn.de |
| 97 | PBG | PROBUGAS, a.s. Bratislava | | SK | VKM |
| 98 | PBGC | PETERSBURG CO-OP GIN | | | SCAC4 |
| 99 | PBGI | PETERSBURG MOTORS INC | | | SCAC3 |
| 100 | PBGN | POLLOCK BROTHERS GROUP INC | | | SCAC4 |
