| 1 | PTT | Promotora Industra Totolapa, S.A. de C.V. | Callsign: Totolapa, | MEX | AVCODES |
| 2 | PTT | Promotora Industria Totolapa | | | ICAO1 |
| 3 | PTT | Post | | CH | TRAFFIC |
| 4 | PTTA | PARAMOUNT TRUCK SALES | | | SCAC4 |
| 5 | PTTB | PTL TIRE SERVICE INC | | | SCAC3 |
| 6 | PTTB | PATTON LUMBER CO | | | SCAC4 |
| 7 | PTTC | PATERSON TALLOW CO | | | SCAC3 |
| 8 | PTTC | PINE TREE TRUCKING | | | SCAC4 |
| 9 | PTTD | PATTI DELIVERY INC | | | SCAC3 |
| 10 | PTTD | POTTER INC | | | SCAC4 |
| 11 | PTTE | POTTER, TROY INC | | | SCAC3 |
| 12 | PTTE | PATTERSON, GRANT | | | SCAC4 |
| 13 | PTTF | PETERSON TRANSFER | | | SCAC3 |
| 14 | PTTF | POINT TRANSFER | | | SCAC4 |
| 15 | PTTG | PONTIAC TRUCKING INC | | | SCAC3 |
| 16 | PTTG | PARTEE TRUCKING | | | SCAC4 |
| 17 | PTTH | P T TRANSFER | | | SCAC3 |
| 18 | PTTI | PORT TERMINAL TRANSPORTATION INC | | | SCAC3 |
| 19 | PTTI | PETROLEUM TRANSPORT INC | | | SCAC4 |
| 20 | PTTJ | POWERLINE TRUCK TRANSPORT | | | SCAC3 |
| 21 | PTTJ | P T | | | SCAC4 |
| 22 | PTTL | PRIME TIME TRANSPORTATION INC | | | SCAC4 |
| 23 | PTTM | PITTMAN TRANSPORT INC | | | SCAC3 |
| 24 | PTTN | PINE TREE TRUCKING INC | | | SCAC3 |
| 25 | PTTN | PRATT TRANSPORT | | | SCAC4 |
| 26 | PTTO | PETROLEUM TRANSPORT INC | | | SCAC3 |
| 27 | PTTP | PRO TRANSPORT TAMPA INC | | | SCAC4 |
| 28 | PTTQ | PORTSMOUTH TERMINALS INC | | | SCAC3 |
| 29 | PTTS | PETROLEUM TRANSPORT SERVICES INC | | | SCAC4 |
| 30 | PTTT | PORT TERMINAL TRANSPORT INC | | | SCAC3 |
| 31 | PTTU | PARITET LTD | | RUS | BIC |
| 32 | PTTU | TRIKORA LLOYD, P.T. KERR CO. | | | SCAC3 |
| 33 | PTTV | PANORAMA TOUR & TRAVEL INC | | | SCAC3 |
| 34 | PTTW | PORT OF TACOMA | | | SCAC3 |
| 35 | PTTW | PST TRANSPORT INC | | | SCAC4 |
| 36 | PTTX | TTX Co. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 37 | PTTX | Trailer Train Co. | added 10/1964; 7/1965-1/1980; eliminated 1/1992 | | NAKINA |
| 38 | PTTX | Pensacola Tar & Turpentine Co. | 8/1920-7/1923 | | NAKINA |
| 39 | PTTX | Trailer Train Co. | added 10/1964 | | NAKINA |
| 40 | PTTX | Trailer Train Co. (FMS flat cars specially equipped with bulkheads 48'6"" apart, to provide for loading of wallboard, plywood, etc.) | 7/1965-10/1968 | | NAKINA |
| 41 | PTTX | Trailer Train Co./TTX Co. (flat cars equipped with bulkheads, spaced 48'6"" apart, for transporting plywood, wallboard, etc.) | 4/1970-1/1994 | | NAKINA |
| 42 | PTTX | TTX Co. (flat cars equipped with bulkheads, spaced 48'6"" apart, for transporting plywood, wallboard, etc., equipped with end of car cush.) | 7/2000 | | NAKINA |
| 43 | PTTX | Trailer Train Co. | Jul-65 | | NRHS |
| 44 | PTTX | Trailer Train Co. (FMS flat cars specially equipped with bulkheads 48'6" apart, to provide for loading of wallboard, plywood, etc.) | 10/66-10/68 | | NRHS |
| 45 | PTTX | Trailer Train Co. | Apr-70 | | NRHS |
| 46 | PTTX | Trailer Train Co. (flat cars equipped with bulkheads, spaced 48'6" apart, for transporting plywood, wallboard, etc.) | 1/75-1/80; eliminated 1/92 | | NRHS |
| 47 | PTTX | TTX Co. (flat cars equipped with bulkheads, spaced 48'6" apart, for transporting plywood, wallboard, etc.) | added 1/92; 1/94 | | NRHS |
| 48 | PTTX | TTX Co. (flat cars equipped with bulkheads, spaced 48'6" apart, for transporting plywood, wallboard, etc., equipped with end of car cush.) | Jul-00 | | NRHS |
| 49 | PTTX | *PENSACOLA TAR & TURPENTINE CO. | | | PWRC |
| 50 | PTTX | +TTX COMPANY | | | PWRC |
| 51 | PTTX | TTX Corporation | | | RSRV |
| 52 | PTTX | TTX COMPANY | | | SCAC4 |
| 53 | PTTY | PETTY, CHARLES F & SONS INC | | | SCAC3 |
| 54 | PTTY | PETTYS TRUCKING INC | | | SCAC4 |
