| 1 | SPN | Skorpion Air | Callsign: Air Skorpion, | BG | AVCODES |
| 2 | SPN | Sepahan Airlines | IATA: H8, Callsign: Sepahan, Founded in 2010. Ceased operations during 2014. Name changed from Hesa Airlines during 2011. | IR | AVCODES |
| 3 | SPN | Skorpion Air | | | ICAO1 |
| 4 | SPNC | SPRINTER TRUCKING INC | | | SCAC4 |
| 5 | SPND | SPLENDOR POOLS | | | SCAC4 |
| 6 | SPNE | SPENCER TRUCKING INC | | | SCAC4 |
| 7 | SPNF | SUNOCO PIPELINE L P | | | SCAC4 |
| 8 | SPNJ | SPARTA LOGISTICS | | | SCAC4 |
| 9 | SPNK | SPINNAKER, INC | | | SCAC1 |
| 10 | SPNK | SPINNAKER TRANSPORTATION INC | | | SCAC4 |
| 11 | SPNM | SPANN ENTERPRISES | | | SCAC4 |
| 12 | SPNN | SPINNAKER INC | | | SCAC4 |
| 13 | SPNQ | SHIPNTRANS | | | SCAC4 |
| 14 | SPNR | STEPPY TRANSPORTATION LLC | | | SCAC4 |
| 15 | SPNU | PT SALAM PACIFIC INDONESIA LINES | | RI | BIC |
| 16 | SPNU | PT SALAM PACIFIC INDONESIA LINES | | | SCAC4 |
| 17 | SPNW | STEPHAN, C TRUCKING INC | | | SCAC4 |
| 18 | SPNX | Suburban Propane Nat-Gas Co. of New Jersey | added 1/1956; eliminated 4/1957 | | NAKINA |
| 19 | SPNX | Suburban Propane Gas Corp. | added 4/1957; 10/1957-10/1966; eliminated 7/1969 | | NAKINA |
| 20 | SPNX | Suburban Propane Nat-Gas Co. of New Jersey | eliminated 4/57 | | NRHS |
| 21 | SPNX | Suburban Propane Gas Corp. | added 4/57; 10/57-10/66; eliminated 7/69 | | NRHS |
| 22 | SPNX | SUBURBAN PROPANE GAS CORP. | | | PWRC |
