| 1601 | PCMN | PACIFIC MAGNETICS INC | | | SCAC4 |
| 1602 | PCMO | PACIFIC COAST MOVING AND STORAGE | | | SCAC3 |
| 1603 | PCMO | ONE HUNDRED PERCENT (100%) | | | SCAC4 |
| 1604 | PCMQ | PACIFIC CONTAINER MANAGEMENT SERVIC | | | SCAC4 |
| 1605 | PCMR | PLEASURE CRAFT MARINE ENGINE CO | | | SCAC3 |
| 1606 | PCMS | PENN, C M & SONS INC | | | SCAC3 |
| 1607 | PCMS | PACIFIC COMMERCIAL SERVICES LLC | | | SCAC4 |
| 1608 | PCMT | PCM TRUCKING, INC | | | SCAC3 |
| 1609 | PCMT | PCM TRANSPORT LLC | | | SCAC4 |
| 1610 | PCMU | UNITED INITIATORS GMBH | | D | BIC |
| 1611 | PCMU | PEROXID-CHEM | | | SCAC4 |
| 1612 | PCMW | PINELLAS COMPRESSOR & MOTOR WORKS I | | | SCAC3 |
| 1613 | PCMW | PACIFIC COAST MARINE WINDSHIELDS LT | | | SCAC4 |
| 1614 | PCMX | Petro-Chem Marketing Co. | added 7/1968; 4/1970-1/1980; eliminated 4/1992 | | NAKINA |
| 1615 | PCMX | Petro-Chem Marketing, Inc. | added 1/1965; 7/1965-10/1966; eliminated 7/1968 | | NAKINA |
| 1616 | PCMX | Petro-Chem Marketing, Inc. | added 1/65; 7/65-10/66; eliminated 7/68 | | NRHS |
| 1617 | PCMX | Petro-Chem Marketing Co. | added 7/68; 4/70-1/80; eliminated 4/92 | | NRHS |
| 1618 | PCMX | RETIRED 02-18-92 ATP (1462) [PETRO-CHEM MARKETING CO.] | | | PWRC |
| 1619 | PCMX | Petro-Chem Marketing | | | RSRV |
| 1620 | PCMX | PETRO-CHEM MARKETING INC | | | SCAC3 |
| 1621 | PCMZ | PENINSULAR COMMUTER (SAN MATEO COUNTY TRANSIT DISTRICT) | | | PWRC |
| 1622 | PCN | Princeton Aviation Corporation | Callsign: Princeton, | USA | AVCODES |
| 1623 | PCN | Princeton Aviation Corporation | | | ICAO1 |
| 1624 | PCN | Point Comfort & Northern Ry. Co. | 1/1975-1/1980; added 4/1980; 1/1994-7/2005 | | NAKINA |
| 1625 | PCN | Point Comfort & Northern Ry. Co. | 1/75-1/80; added 4/80; 1/94-7/2000 | | NRHS |
| 1626 | PCN | POINT COMFORT & NORTHERN RAILWAY CO. | | | PWRC |
| 1627 | PCN | Point Comfort and Northern Railway | | | RSRV |
| 1628 | PCNA | PRINCESS NAVIGATION LTD MONROVIA LI | | | SCAC3 |
| 1629 | PCNA | PACT TRANSPORT LLC | | | SCAC4 |
| 1630 | PCNC | PACIFIC TRANSPORTATION SERVICES INC | | | SCAC4 |
| 1631 | PCND | PACIFIC CONCORD INTERNATIONAL CORP. | | | SCAC3 |
| 1632 | PCND | PACIFIC CONCORD INTERNATIONAL LIMIT | | | SCAC4 |
| 1633 | PCNF | PECAN INTERNATIONAL FORWARDERS INC | | | SCAC3 |
| 1634 | PCNI | PORT CONTAINER INDUSTRIES INC | | | SCAC3 |
| 1635 | PCNM | PRECISION COMPONENTS INC | | | SCAC4 |
| 1636 | PCNN | PRECISION TRUCK LINES INC | | | SCAC4 |
| 1637 | PCNP | PACK CRATE N SHIP | | | SCAC3 |
| 1638 | PCNR | PRECISION CONTAINER SHIPPING LINE | | | SCAC3 |
| 1639 | PCNS | PERRY, C A & SON TRANSIT INC | | | SCAC3 |
| 1640 | PCNS | PERRY, C A & SON TRANSIT INC | | | SCAC4 |
| 1641 | PCNT | PACON TRANSPORTATION | | | SCAC3 |
| 1642 | PCNT | PACIFIC NINE (9) TRANSPORTATION INC | | | SCAC4 |
| 1643 | PCNU | PADOS COMPANIA NAVIERA | | | SCAC3 |
| 1644 | PCNV | PACNAV S A | | | SCAC3 |
| 1645 | PCNV | PACNAV S A | | | SCAC4 |
| 1646 | PCNW | PACIFIC CARTAGE&WAREHOUSING, INC | | | SCAC3 |
| 1647 | PCNZ | Flexi-Van Leasing | | | RSRV |
| 1648 | PCO | Pacific Coastal Airlines Limited | IATA: 8P, Callsign: Pasco, | CDN | AVCODES |
| 1649 | PCO | Pacific Coastal Airline | IATA: 8P | | ICAO1 |
| 1650 | PCOA | PALCO AIR CARGO | | | SCAC3 |
| 1651 | PCOA | PALCO AIR CARGO | | | SCAC4 |
| 1652 | PCOB | PUCINO BROS | | | SCAC3 |
| 1653 | PCOC | PICCOTTI CORP | | | SCAC3 |
| 1654 | PCOE | PACIFIC COAST EXPRESS | | | SCAC3 |
| 1655 | PCOF | PACIFIC CONTINENTAL SHIPPERS | | | SCAC4 |
| 1656 | PCOH | PREMIER COACH CO INC | | | SCAC4 |
| 1657 | PCOI | PASCAP CO INC | | | SCAC3 |
| 1658 | PCOI | PASCAP CO INC | | | SCAC4 |
| 1659 | PCOJ | PETRUCELA & COMPANY | | | SCAC4 |
| 1660 | PCOK | PRESCOTT TANK LINES INC | | | SCAC4 |
| 1661 | PCOM | PARCO | | | SCAC3 |
| 1662 | PCOM | PARDO CORRAL, MANUEL | | | SCAC4 |
| 1663 | PCON | PROMAN CONTAINERS INC. | | | SCAC3 |
| 1664 | PCON | PROMAN CONTAINERS INC | | | SCAC4 |
| 1665 | PCOO | PIERCE OIL COMPANY INC | | | SCAC4 |
| 1666 | PCOP | PALM COAST CO-OP FARM LINES INC | | | SCAC3 |
| 1667 | PCOP | PRO COOPERATIVE | | | SCAC4 |
| 1668 | PCOQ | POSNER CORP | | | SCAC4 |
| 1669 | PCOR | PEARCOOR EXPRESS INC | | | SCAC3 |
| 1670 | PCOS | PATRIOT COURIER SERVICE, INC | | | SCAC3 |
| 1671 | PCOS | PROCOAT TECHNOLOGIES INC | | | SCAC4 |
| 1672 | PCOT | PACIFIC COAST TRANSPORT | | | SCAC3 |
| 1673 | PCOU | PRAXAIR COSTA RICA | | | SCAC4 |
| 1674 | PCOW | PULVERMACHE | | | SCAC4 |
| 1675 | PCOX | Phoenix Cotton Oil Co. | 8/1920 | | NAKINA |
| 1676 | PCOX | PHOENIX COTTON OIL CO. | | | PWRC |
| 1677 | PCOZ | PEVIER COAL COMPANY | | | PWRC |
| 1678 | PCPC | PANCO PETROLEUM PANSTAR PROPANE | | | SCAC4 |
| 1679 | PCPI | POIRIER, CHRISTIAN PIERRE | | | SCAC4 |
| 1680 | PCPL | PACIFIC PALLET LTD | | | SCAC3 |
| 1681 | PCPN | PEDREGAL COMPANIA NAVIERA S A | | | SCAC3 |
| 1682 | PCPO | PRECISION TRANSPORTATION INC | | | SCAC3 |
| 1683 | PCPR | PACE TRANSPORT INC | | | SCAC3 |
| 1684 | PCPS | PARCEL POST (DIV OF UNITED STATES P | | | SCAC3 |
| 1685 | PCPT | POPLAR CAMP TRUCK REPAIR | | | SCAC3 |
| 1686 | PCPT | PRACTICALLY PERFECT TRUCKS | | | SCAC4 |
| 1687 | PCPW | P C TRANSPORTATION SERVICES OF WISC | | | SCAC3 |
| 1688 | PCPZ | PC POTASH PLANT | | | PWRC |
| 1689 | PCQC | PACIFIC CONTAINER LINE HONG KONG | | | SCAC3 |
| 1690 | PCQC | PETROLEUM CARGO CARRIERS LLC | | | SCAC4 |
| 1691 | PCQG | PC INTERMODAL INC | | | SCAC4 |
| 1692 | PCQI | PANCREST, INC. | | | SCAC3 |
| 1693 | PCQI | PRAIRIECOAST EQUIPMENT INC | | | SCAC4 |
| 1694 | PCQM | PC MOTOR LINES INC | | | SCAC3 |
| 1695 | PCQS | PRECISE TRANSPORT INC | | | SCAC4 |
| 1696 | PCQT | P & C TRANSPORT INC | | | SCAC3 |
| 1697 | PCQU | PACIFIC CONTAINER LOGISTICS | | | SCAC4 |
| 1698 | PCR | Pearson Aviation Corporation d/b/a Pac Air | Callsign: Pacair, | USA | AVCODES |
| 1699 | PCR | Island Pacific Air | Callsign: Pacair, | USA | AVCODES |
| 1700 | PCR | PAC Air | | | ICAO1 |
