| 3701 | PH&D | Port Huron and Detroit R.R. Co. | 7/65-10/66 | | NRHS |
| 3702 | PH&D | PORT HURON & DETROIT RAILROAD (NOW CSX TRANSPORTATION) | | | PWRC |
| 3703 | PHA | Phoenix Air Group, Inc. | IATA: PH, Callsign: Gray Bird, ICAO Designator changed to GRB. | USA | AVCODES |
| 3704 | PHA | Phoenix Air Group | | | ICAO1 |
| 3705 | PHAC | PHILLY A C TOURS INC | | | SCAC3 |
| 3706 | PHAD | PADRON HERNANDEZ, ADAN | | | SCAC4 |
| 3707 | PHAE | PACIFIC HARBOR EXPRESS | | | SCAC3 |
| 3708 | PHAE | PHINO TRANSFER | | | SCAC4 |
| 3709 | PHAI | PHASE II TRANSPORTATION INC | | | SCAC4 |
| 3710 | PHAK | PHILADELPHIA TANKER CORP | | | SCAC3 |
| 3711 | PHAL | PHALANX LOGISTICS SOLUTIONS | | | SCAC4 |
| 3712 | PHAM | PELHAM TRANSPORT SERVICES INC | | | SCAC4 |
| 3713 | PHAN | PHANTOM EXPRESS, INC | | | SCAC3 |
| 3714 | PHAP | PITTSBURG HOT LINK PACKER INC | | | SCAC4 |
| 3715 | PHAR | PHARAOHS TRUCKING & STORAGE INC | | | SCAC4 |
| 3716 | PHAS | PHARMA LASER | | | SCAC4 |
| 3717 | PHAT | PARHAM TRUCKING | | | SCAC3 |
| 3718 | PHAZ | PORT OF HOUSTON AUTHORITY | | | PWRC |
| 3719 | PHB | Phoebus Apollo Aviation CC | IATA: PE, Callsign: Phoebus, IATA Prefix: 855, Designator PE recalled by IATA | ZA | AVCODES |
| 3720 | PHB | Phoebus Apollo Aviation CC | Callsign: Phoebus, IATA Prefix: 855, Designator PE recalled by IATA | ZA | AVCODES |
| 3721 | PHB | Phoebus Apollo Aviation | | | ICAO1 |
| 3722 | PHB | Peter Hausmann & Co Bauunternehmung | | DE | VKM |
| 3723 | PHBA | PHILADELPHIA BULK AGENCIES INC | | | SCAC3 |
| 3724 | PHBC | PHILIP BROTHERS CHEMICAL INC | | | SCAC3 |
| 3725 | PHBC | PHOENICIAN BULK CARRIERS LTD | | | SCAC4 |
| 3726 | PHBE | PHOENIX BEREEDE | | | SCAC4 |
| 3727 | PHBH | PANHANDLE BOAT HAULERS | | | SCAC3 |
| 3728 | PHBI | PIONEER HI-BRED PRODUCTION LTD | | | SCAC4 |
| 3729 | PHBL | POLKINHORN, BILL INC | | | SCAC4 |
| 3730 | PHBM | PHIBER MANUFACTURING INC | | | SCAC4 |
| 3731 | PHBR | PHILBAR TRANSPORTATION | | | SCAC3 |
| 3732 | PHBR | PHILIPSBURG TRANSIT LTEE | | | SCAC4 |
| 3733 | PHBS | PHILS BUS SERVICE | | | SCAC3 |
| 3734 | PHC | Petroleum Helicopters de Colombia, S.A. | Callsign: Helicopters, Subsidary of Petroleum Helicopters, Inc. | CO | AVCODES |
| 3735 | PHC | Petroleum Helicopters de Colombia | | | ICAO1 |
| 3736 | PHC | PETROCART SA | | RO | VKM |
| 3737 | PHCA | PANHANDLE COOPERATIVE ASSOCIATION | | | SCAC4 |
| 3738 | PHCC | PANHANDLE CARTAGE COMPANY INCORPORA | | | SCAC4 |
| 3739 | PHCH | P & H CHARTER | | | SCAC3 |
| 3740 | PHCH | PHOTECH ENVIRONMENTAL SOLUTIONS INC | | | SCAC4 |
| 3741 | PHCL | PHOENIX COURIER LTD | | | SCAC3 |
| 3742 | PHCM | PATRIOT HAULING CO | | | SCAC4 |
| 3743 | PHCO | PHILADELPHIA COKE | | | PWRC |
| 3744 | PHCO | PHONECO | | | SCAC3 |
| 3745 | PHCO | PACHECO, CARMEN TRANSPORTATION LLC | | | SCAC4 |
| 3746 | PHCP | PHELPS, C P INC | | | SCAC4 |
| 3747 | PHCQ | PHILLIPS TRUCKING COMPANY | | | SCAC3 |
| 3748 | PHCR | PORT COLBORNE HARBOUR RAILWAY | | | PWRC |
| 3749 | PHCR | Port Colborne Harbour Railway | | | RSRV |
| 3750 | PHCT | PHILLIPS, CHARLES TRUCKING INC | | | SCAC3 |
| 3751 | PHCU | SC INDUSTRIAL GAS MANUFACTURER LTD | | | SCAC4 |
| 3752 | PHCX | Harnischfeger Corp. | 7/1965 (not listed); added 4/1966; 10/1966; eliminated 7/1969 | | NAKINA |
| 3753 | PHCX | Harnischfeger Corp. | added 4/66; 7/65-10/66; eliminated 7/69 | | NRHS |
| 3754 | PHCX | HARNISCHFEGER CORP. | | | PWRC |
| 3755 | PHD | Duncan Aviation, Inc. | Callsign: Panhandle, | USA | AVCODES |
| 3756 | PHD | Duncan Aviation | | | ICAO1 |
| 3757 | PHD | Port Huron and Detroit R.R. Co. | 1/1975-7/2005; eliminated 10/2008 | | NAKINA |
| 3758 | PHD | (PH&D) Port Huron and Detroit R.R. Co. | 4/1970 | | NAKINA |
| 3759 | PHD | (PH&D) Port Huron and Detroit R.R. Co. | Apr-70 | | NRHS |
| 3760 | PHD | Port Huron and Detroit R.R. Co. | 1/75-7/2000 | | NRHS |
| 3761 | PHD | CSX TRANSPORTATION, INC. [CHESSIE SYSTEM; PORT HURON & DETROIT RAILROAD] | | | PWRC |
| 3762 | PHD | Port Huron and Detroit Railroad (CSX Transportation) | | | RSRV |
| 3763 | PHD | Port Huron and Detroit Railroad Company | City: Grodzisk Mazowiecki | USA | TRAFFIC |
| 3764 | PHDB | PHYSICAL DISTRIBUTION SERVICES, INC. | | | SCAC3 |
| 3765 | PHDB | PHYSICAL DISTRIBUTION SERVICE INC | | | SCAC4 |
| 3766 | PHDC | PARHAM, H D CO INC | | | SCAC3 |
| 3767 | PHDC | POLISH EXPRESS INC | | | SCAC4 |
| 3768 | PHDH | PLATINUM HOME DELIVERY | | | SCAC4 |
| 3769 | PHDI | PHIL-DI OF TEXAS | | | SCAC3 |
| 3770 | PHDL | PHILLIPS, D L TRUCKING | | | SCAC3 |
| 3771 | PHDN | PHIL-DAN TRUCKING | | | SCAC3 |
| 3772 | PHDQ | PONDEROSA HEAVY DUTY TRUCKS INC | | | SCAC4 |
| 3773 | PHDS | PITCHER, CARL L | | | SCAC4 |
| 3774 | PHDT | P H D TRUCKING SERVICE INC | | | SCAC3 |
| 3775 | PHDT | PICHARDO, D TRANSPORT | | | SCAC4 |
| 3776 | PHDX | Phelps-Dodge Corp. | added 1/1960; 4/1961-1/1975; eliminated 10/1978 | | NAKINA |
| 3777 | PHDX | Phelps-Dodge Corp. | added 1/60; 4/61-1/75; eliminated 10/78 | | NRHS |
| 3778 | PHDX | PHELPS-DODGE CORP. | | | PWRC |
| 3779 | PHDX | PHELPS DODGE CORP | | | SCAC3 |
| 3780 | PHE | Pawan Hans Limited | Callsign: Pawan Hans, | IND | AVCODES |
| 3781 | PHE | Pawan Hans | | | ICAO1 |
| 3782 | PHEC | PHELCO INCORPORATED | | | SCAC3 |
| 3783 | PHEE | PEREZ, HERIBERTO | | | SCAC4 |
| 3784 | PHEH | P & H EXPRESS LLC | | | SCAC4 |
| 3785 | PHEI | PHOTO EXPRESS INC | | | SCAC3 |
| 3786 | PHEI | P H EXPRESS INC | | | SCAC4 |
| 3787 | PHEK | PAINT HORSE EXPRESS ODS LLC | | | SCAC4 |
| 3788 | PHEL | PHELAN, GERALD LLC | | | SCAC4 |
| 3789 | PHEN | PHOENIX TRANSPORTATION INC | | | SCAC3 |
| 3790 | PHEN | PHENIX TRANSPORTATION INC | | | SCAC4 |
| 3791 | PHEO | PHILPET TRUCKING | | | SCAC3 |
| 3792 | PHEP | PRAIRIE HYDRAULIC EQUIPMENT LTD | | | SCAC4 |
| 3793 | PHEQ | PHELPS DELIVERY | | | SCAC3 |
| 3794 | PHER | PENA HERNANDEZ, BALDEMAR | | | SCAC4 |
| 3795 | PHES | PHEASANT EXPRESS INC | | | SCAC3 |
| 3796 | PHET | PHELPS TRUCKING COMPANY INC | | | SCAC3 |
| 3797 | PHEU | PURE HELIUM GULF FZE | | | SCAC4 |
| 3798 | PHEW | P H E | | | SCAC3 |
| 3799 | PHF | Shaanxi Phoenix International Flying College Co., Ltd. | Callsign: Shan Feng, | PRC | AVCODES |
| 3800 | PHFE | PIGEON HOLLOW FARMS EXPRESS | | | SCAC3 |
