sensors Mode-S transponder
ABA800
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N850GT · BOEING 747-8 · operated by ATLAS AIR INC
- Hex
- ABA800
- Octal
- 52724000
- Decimal
- 11,249,664
- Country
- US
- Tail
- N850GT
- Type
- B748
- Flights observed
- 26
- Distinct callsigns
- 10
- Country
- US
- Last broadcast
- 9h ago
Last known position
Country allocation
The ICAO 24-bit address ABA800 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 10 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| GTI538 | Atlas Air | 6 | 2026-05-02 |
| GTI537 | Atlas Air | 4 | 2026-05-01 |
| GTI8697 | Atlas Air | 3 | 2026-05-06 |
| GTI612 | Atlas Air | 3 | 2026-04-25 |
| GTI5579 | Atlas Air | 3 | 2026-04-27 |
| GTI9001 | Atlas Air | 2 | 2026-04-24 |
| GTI654 | Atlas Air | 2 | 2026-04-28 |
| GTI8698 | Atlas Air | 1 | 2026-05-06 |
| GTI6581 | Atlas Air | 1 | 2026-05-03 |
| GTI5578 | Atlas Air | 1 | 2026-04-25 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-06 | GTI8698 | EMA → BAH | May 6, 08:15 UTC | May 6, 17:45 UTC | 9h 29m |
| 2026-05-06 | GTI8697 | ORD → ICN | May 6, 05:20 UTC | May 6, 05:35 UTC | 15m |
| 2026-05-05 | GTI8697 | ORD → ICN | May 5, 19:00 UTC | May 6, 02:45 UTC | 7h 45m |
| 2026-05-04 | GTI8697 | ORD → ICN | May 4, 06:50 UTC | May 4, 15:15 UTC | 8h 25m |
| 2026-05-03 | GTI6581 | MIA → UIO | May 3, 07:20 UTC | May 3, 17:45 UTC | 10h 25m |
| 2026-05-02 | GTI538 | ANC → LAX | May 2, 20:35 UTC | May 3, 03:30 UTC | 6h 54m |
| 2026-05-02 | GTI538 | ANC → LAX | May 2, 11:45 UTC | May 2, 18:45 UTC | 7h 0m |
| 2026-05-01 | GTI538 | ANC → LAX | May 1, 16:05 UTC | May 2, 13:00 UTC | 20h 55m |
| 2026-05-01 | GTI537 | ANC → ICN | May 1, 15:15 UTC | May 2, 13:00 UTC | 21h 45m |
| 2026-05-01 | GTI537 | ANC → ICN | May 1, 08:45 UTC | May 1, 16:50 UTC | 8h 5m |
| 2026-04-30 | GTI537 | ANC → ICN | Apr 30, 22:20 UTC | May 1, 06:35 UTC | 8h 15m |
| 2026-04-30 | GTI538 | ANC → LAX | Apr 30, 11:05 UTC | Apr 30, 18:15 UTC | 7h 10m |
| 2026-04-29 | GTI538 | ANC → LAX | Apr 29, 18:20 UTC | Apr 30, 09:10 UTC | 14h 49m |
| 2026-04-29 | GTI538 | ANC → LAX | Apr 29, 12:05 UTC | Apr 30, 09:10 UTC | 21h 4m |
| 2026-04-29 | GTI537 | ANC → ICN | Apr 29, 01:15 UTC | Apr 29, 09:10 UTC | 7h 56m |
| 2026-04-28 | GTI654 | ANC → ORD | Apr 28, 15:10 UTC | Apr 28, 22:35 UTC | 7h 25m |
| 2026-04-28 | GTI654 | ANC → ORD | Apr 28, 03:40 UTC | Apr 28, 12:45 UTC | 9h 5m |
| 2026-04-27 | GTI5579 | MIA → AMS | Apr 27, 04:10 UTC | Apr 27, 04:30 UTC | 20m |
| 2026-04-26 | GTI5579 | MIA → AMS | Apr 26, 16:55 UTC | Apr 26, 21:05 UTC | 4h 10m |
| 2026-04-26 | GTI5579 | MIA → AMS | Apr 26, 04:00 UTC | Apr 26, 12:05 UTC | 8h 5m |
| 2026-04-25 | GTI5578 | UIO → MIA | Apr 25, 11:30 UTC | Apr 26, 01:05 UTC | 13h 35m |
| 2026-04-25 | GTI612 | HSV → MIA | Apr 25, 06:15 UTC | Apr 25, 07:45 UTC | 1h 30m |
| 2026-04-24 | GTI612 | HSV → MIA | Apr 24, 21:40 UTC | Apr 25, 03:40 UTC | 6h 0m |
| 2026-04-24 | GTI612 | HSV → MIA | Apr 24, 10:10 UTC | Apr 24, 18:50 UTC | 8h 40m |
| 2026-04-24 | GTI9001 | MIA → ORD | Apr 24, 06:05 UTC | Apr 24, 06:35 UTC | 30m |
| 2026-04-24 | GTI9001 | MIA → ORD | Apr 24, 05:00 UTC | Apr 24, 05:35 UTC | 35m |
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 N850GT page for operator, model, and routing details .