| 1 | TOP | Top Air Havacilik Sanayi Ve Ticaret A.S. | Callsign: Air Top, | TR | AVCODES |
| 2 | TOP | Topflight Aviation Co. Ltd. | Callsign: topflight, | GB | AVCODES |
| 3 | TOP | Top Air | | | ICAO1 |
| 4 | TOP | TEXAS, OKLAHOMA & PORTLAND | | | PWRC |
| 5 | TOPC | TOP CLASS LLC | | | SCAC4 |
| 6 | TOPD | TOPLINE TRANSPORTATION INC | | | SCAC4 |
| 7 | TOPH | TOP HAT LIVESTOCK 2003 LTD | | | SCAC4 |
| 8 | TOPI | TOP CAT INC | | | SCAC4 |
| 9 | TOPK | TOPEAKA FARMS LTD | | | SCAC4 |
| 10 | TOPM | TRANSPORT P M DROUIN | | | SCAC4 |
| 11 | TOPM | Topeka Metropolitan Transit Authority: Topeka Metro | City: Cincinnati | USA | TRAFFIC |
| 12 | TOPO | TOPOCEAN CONSOLIDATION SERVICE (LOS | | | SCAC4 |
| 13 | TOPP | TOPAR, L P OIL CO | | | SCAC4 |
| 14 | TOPQ | T O P S S INC | | | SCAC4 |
| 15 | TOPR | Top Rail | | F | TRAFFIC |
| 16 | TOPU | TOPTAINER CONTAINERMANAGEMENT & SALES GMBH | | D | BIC |
| 17 | TOPU | TOPTAINER CONTAINERMANAGEMENT & SAL | | | SCAC4 |
| 18 | TOPW | TAYLOR OIL & PROPANE INC | | | SCAC4 |
| 19 | TOPY | TOPSYN FLEXIBLE PACKAGING LTD | | | SCAC4 |
