sensors Mode-S transponder
A5417E
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N438GT · BOEING 747-400 · operated by ATLAS AIR INC
- Hex
- A5417E
- Octal
- 51240576
- Decimal
- 10,830,206
- Country
- US
- Tail
- N438GT
- Type
- B744
- Flights observed
- 119
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address A5417E falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.
Callsign history 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| GTI8998 | Atlas Air | 49 | 2026-05-27 |
| GTI8997 | Atlas Air | 31 | 2026-05-25 |
| GTI8818 | Atlas Air | 4 | 2026-05-04 |
| GTI8817 | Atlas Air | 4 | 2026-05-02 |
| GTI8631 | Atlas Air | 4 | 2026-05-10 |
| GTI8503 | Atlas Air | 3 | 2026-05-14 |
| GTI792 | Atlas Air | 3 | 2026-05-05 |
| GTI9912 | Atlas Air | 2 | 2026-05-15 |
| GTI9191 | Atlas Air | 2 | 2026-04-29 |
| GTI8692 | Atlas Air | 2 | 2026-05-12 |
| GTI8422 | Atlas Air | 2 | 2026-05-15 |
| GTI8365 | Atlas Air | 2 | 2026-04-30 |
| GTI8029 | Atlas Air | 2 | 2026-05-07 |
| GTI658 | Atlas Air | 2 | 2026-05-08 |
| CMB132 | - | 2 | 2026-05-06 |
| GTI9002 | Atlas Air | 1 | 2026-05-01 |
| GTI8988 | Atlas Air | 1 | 2026-04-24 |
| GTI8825 | Atlas Air | 1 | 2026-05-07 |
| GTI8824 | Atlas Air | 1 | 2026-05-05 |
| GTI6572 | Atlas Air | 1 | 2026-04-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | GTI8998 | CHS → HHN | May 27, 13:30 UTC | May 27, 20:55 UTC | 7h 25m |
| 2026-05-26 | GTI8998 | CHS → HHN | May 26, 17:09 UTC | May 27, 11:00 UTC | 17h 50m |
| 2026-05-26 | GTI8998 | CHS → HHN | May 26, 11:34 UTC | May 27, 11:00 UTC | 23h 25m |
| 2026-05-25 | GTI8997 | RMS → BWI | May 25, 21:49 UTC | May 26, 05:20 UTC | 7h 30m |
| 2026-05-24 | GTI8998 | CHS → HHN | May 24, 10:00 UTC | May 24, 16:55 UTC | 6h 55m |
| 2026-05-23 | GTI8998 | CHS → HHN | May 23, 14:35 UTC | May 24, 07:25 UTC | 16h 50m |
| 2026-05-23 | GTI8998 | CHS → HHN | May 23, 09:40 UTC | May 24, 07:25 UTC | 21h 45m |
| 2026-05-23 | GTI8998 | CHS → HHN | May 23, 08:30 UTC | May 24, 07:25 UTC | 22h 55m |
| 2026-05-22 | GTI8997 | RMS → BWI | May 22, 22:55 UTC | May 23, 06:35 UTC | 7h 39m |
| 2026-05-22 | GTI8998 | CHS → HHN | May 22, 10:10 UTC | May 22, 18:05 UTC | 7h 55m |
| 2026-05-21 | GTI8998 | CHS → HHN | May 21, 14:30 UTC | May 22, 07:25 UTC | 16h 55m |
| 2026-05-21 | GTI8998 | CHS → HHN | May 21, 09:35 UTC | May 22, 07:25 UTC | 21h 50m |
| 2026-05-21 | GTI8997 | RMS → BWI | May 21, 08:15 UTC | May 22, 07:25 UTC | 23h 10m |
| 2026-05-20 | GTI8997 | RMS → BWI | May 20, 22:10 UTC | May 21, 06:25 UTC | 8h 15m |
| 2026-05-20 | GTI8998 | CHS → HHN | May 20, 11:05 UTC | May 20, 18:10 UTC | 7h 5m |
| 2026-05-19 | GTI8998 | CHS → HHN | May 19, 14:40 UTC | May 20, 08:30 UTC | 17h 51m |
| 2026-05-19 | GTI8998 | CHS → HHN | May 19, 09:40 UTC | May 20, 08:30 UTC | 22h 51m |
| 2026-05-19 | GTI8997 | RMS → BWI | May 19, 08:30 UTC | May 20, 07:30 UTC | 23h 1m |
| 2026-05-18 | GTI8997 | RMS → BWI | May 18, 21:45 UTC | May 19, 05:40 UTC | 7h 55m |
| 2026-05-17 | GTI8998 | CHS → HHN | May 17, 21:30 UTC | May 18, 05:05 UTC | 7h 35m |
| 2026-05-17 | GTI8998 | CHS → HHN | May 17, 02:10 UTC | May 17, 19:30 UTC | 17h 20m |
| 2026-05-16 | GTI8997 | RMS → BWI | May 16, 19:35 UTC | May 17, 19:30 UTC | 23h 55m |
| 2026-05-16 | GTI8997 | RMS → BWI | May 16, 19:25 UTC | May 17, 13:25 UTC | 18h 0m |
| 2026-05-16 | GTI8997 | RMS → BWI | May 16, 08:55 UTC | May 16, 16:55 UTC | 8h 0m |
| 2026-05-15 | GTI8422 | ANC → MIA | May 15, 21:15 UTC | May 16, 04:40 UTC | 7h 25m |
| 2026-05-15 | GTI8422 | ANC → MIA | May 15, 05:30 UTC | May 15, 18:45 UTC | 13h 14m |
| 2026-05-15 | GTI9912 | IAH → CVG | May 15, 02:45 UTC | May 15, 03:05 UTC | 20m |
| 2026-05-14 | GTI9912 | IAH → CVG | May 14, 14:50 UTC | May 14, 19:55 UTC | 5h 5m |
| 2026-05-14 | GTI8503 | HHN → BWI | May 14, 08:05 UTC | May 14, 08:20 UTC | 15m |
| 2026-05-13 | GTI8503 | HHN → BWI | May 13, 23:45 UTC | May 14, 08:00 UTC | 8h 15m |
| 2026-05-13 | GTI8503 | HHN → BWI | May 13, 16:25 UTC | May 13, 18:00 UTC | 1h 35m |
| 2026-05-12 | GTI8692 | ANC → GDL | May 12, 15:20 UTC | May 13, 04:30 UTC | 13h 10m |
| 2026-05-12 | GTI8692 | ANC → GDL | May 12, 03:25 UTC | May 12, 12:55 UTC | 9h 30m |
| 2026-05-10 | GTI8631 | SUU → HNL | May 10, 22:20 UTC | May 10, 22:45 UTC | 25m |
| 2026-05-10 | GTI8631 | SUU → HNL | May 10, 16:04 UTC | May 10, 20:14 UTC | 4h 10m |
| 2026-05-10 | GTI8631 | SUU → HNL | May 10, 06:20 UTC | May 10, 12:30 UTC | 6h 10m |
| 2026-05-09 | GTI8631 | SUU → HNL | May 9, 20:20 UTC | May 10, 04:09 UTC | 7h 50m |
| 2026-05-08 | GTI658 | ANC → ORD | May 8, 23:55 UTC | May 9, 05:00 UTC | 5h 5m |
| 2026-05-08 | GTI658 | ANC → ORD | May 8, 13:40 UTC | May 8, 20:35 UTC | 6h 55m |
| 2026-05-07 | GTI8029 | NZY → EDF | May 7, 21:05 UTC | May 8, 11:30 UTC | 14h 25m |
| 2026-05-07 | GTI8029 | NZY → EDF | May 7, 13:35 UTC | May 7, 16:20 UTC | 2h 45m |
| 2026-05-07 | GTI8825 | HHN → BWI | May 7, 02:40 UTC | May 7, 05:00 UTC | 2h 20m |
| 2026-05-06 | CMB132 | - | May 6, 15:25 UTC | May 6, 23:20 UTC | 7h 55m |
| 2026-05-06 | CMB132 | - | May 6, 00:25 UTC | May 6, 07:45 UTC | 7h 20m |
| 2026-05-05 | GTI8824 | BWI → HHN | May 5, 19:25 UTC | May 5, 20:01 UTC | 35m |
| 2026-05-05 | GTI792 | PVG → ANC | May 5, 09:30 UTC | May 5, 15:45 UTC | 6h 15m |
| 2026-05-05 | GTI792 | PVG → ANC | May 5, 08:45 UTC | May 5, 08:50 UTC | 5m |
| 2026-05-04 | GTI792 | PVG → ANC | May 4, 18:50 UTC | May 5, 07:15 UTC | 12h 25m |
| 2026-05-04 | GTI8818 | UAM → HNL | May 4, 04:09 UTC | May 4, 16:40 UTC | 12h 30m |
| 2026-05-03 | GTI8818 | UAM → HNL | May 3, 20:00 UTC | May 4, 00:40 UTC | 4h 40m |
About Mode-S
A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.
Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.
Prefer a tail-number view? See the N438GT page for operator, model, and routing details .