| 1 | SPQ | Servicios Aereos Palenque, S.A. de C.V. | Callsign: Servicios Palenque, | MEX | AVCODES |
| 2 | SPQ | Servicios Aereos Palenque | | | ICAO1 |
| 3 | SPQ | Southern Pacific Transportation Co. | added 7/1988; 1/1994 | | NAKINA |
| 4 | SPQ | Union Pacific R.R. Co. | 7/2000-7/2005 | | NAKINA |
| 5 | SPQ | Southern Pacific Transportation Co. | added 7/88; 1/94 | | NRHS |
| 6 | SPQ | Union Pacific R.R. Co. | Jul-00 | | NRHS |
| 7 | SPQ | UNION PACIFIC RAILROAD [SOUTHERN PACIFIC TRANSPORTATION CO.] | | | PWRC |
| 8 | SPQ | Southern Pacific Railroad (Union Pacific Railroad) | | | RSRV |
| 9 | SPQA | SPIRIT LOGISTICS INC | | | SCAC4 |
| 10 | SPQB | SUTTON, PERCY TRUCKING INC | | | SCAC4 |
| 11 | SPQD | STAMPEDE LOGISTICS GROUP | | | SCAC4 |
| 12 | SPQK | S & P TRUCKING INC | | | SCAC4 |
| 13 | SPQL | SPECIAL TEAMS INTERNATIONAL INC | | | SCAC4 |
| 14 | SPQN | S & T TRANSPORT INC | | | SCAC4 |
| 15 | SPQO | SUPER QUALITY OIL CO INC | | | SCAC4 |
| 16 | SPQP | S S P TRANSPORT | | | SCAC4 |
| 17 | SPQS | SPS | | | SCAC4 |
| 18 | SPQT | SOUTH POINT EQUINE TRANSPORT INC | | | SCAC4 |
| 19 | SPQV | SPECIALTY MOVING SYSTEMS INC | | | SCAC4 |
| 20 | SPQW | SAPPHIRE MARINE CO LTD | | | SCAC4 |
| 21 | SPQY | SAPA CANADA INC | | | SCAC4 |
