sensors Mode-S transponder
ABB6DC
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N854GT · BOEING 747-8 · operated by ATLAS AIR INC
- Hex
- ABB6DC
- Octal
- 52733334
- Decimal
- 11,253,468
- Country
- US
- Tail
- N854GT
- Type
- B748
- Flights observed
- 80
- Distinct callsigns
- 6
- Country
- US
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address ABB6DC 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 6 distinct
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | GTI804 | ORD → JFK | May 30, 10:30 UTC | May 30, 11:00 UTC | 30m |
| 2026-05-29 | GTI804 | ORD → JFK | May 29, 19:10 UTC | May 30, 08:25 UTC | 13h 15m |
| 2026-05-28 | GTI803 | EZE → MIA | May 28, 20:00 UTC | May 29, 10:05 UTC | 14h 5m |
| 2026-05-27 | GTI804 | ORD → JFK | May 27, 19:30 UTC | May 28, 08:50 UTC | 13h 20m |
| 2026-05-23 | GTI801 | TLV → LGG | May 23, 18:15 UTC | May 24, 07:30 UTC | 13h 15m |
| 2026-05-23 | GTI804 | ORD → JFK | May 23, 07:50 UTC | May 23, 13:15 UTC | 5h 25m |
| 2026-05-22 | GTI804 | ORD → JFK | May 22, 16:00 UTC | May 23, 05:20 UTC | 13h 20m |
| 2026-05-21 | GTI803 | EZE → MIA | May 21, 20:25 UTC | May 22, 09:55 UTC | 13h 30m |
| 2026-05-21 | GTI804 | ORD → JFK | May 21, 11:20 UTC | May 21, 17:00 UTC | 5h 40m |
| 2026-05-20 | GTI804 | ORD → JFK | May 20, 19:05 UTC | May 21, 09:00 UTC | 13h 55m |
| 2026-05-19 | GTI803 | EZE → MIA | May 19, 18:20 UTC | May 20, 08:05 UTC | 13h 46m |
| 2026-05-19 | GTI802 | PVG → ANC | May 19, 08:20 UTC | May 19, 13:30 UTC | 5h 10m |
| 2026-05-18 | GTI802 | PVG → ANC | May 18, 22:50 UTC | May 19, 06:15 UTC | 7h 25m |
| 2026-05-16 | GTI801 | TLV → LGG | May 16, 19:20 UTC | May 17, 09:25 UTC | 14h 5m |
| 2026-05-16 | GTI804 | ORD → JFK | May 16, 09:01 UTC | May 16, 14:35 UTC | 5h 35m |
| 2026-05-15 | GTI804 | ORD → JFK | May 15, 22:45 UTC | May 16, 06:06 UTC | 7h 21m |
| 2026-05-14 | GTI803 | EZE → MIA | May 14, 22:40 UTC | May 15, 11:35 UTC | 12h 55m |
| 2026-05-14 | GTI804 | ORD → JFK | May 14, 11:25 UTC | May 14, 17:00 UTC | 5h 35m |
| 2026-05-13 | GTI804 | ORD → JFK | May 13, 18:45 UTC | May 14, 08:50 UTC | 14h 5m |
| 2026-05-12 | GTI803 | EZE → MIA | May 12, 20:05 UTC | May 13, 09:50 UTC | 13h 45m |
| 2026-05-12 | GTI802 | PVG → ANC | May 12, 11:35 UTC | May 12, 16:45 UTC | 5h 10m |
| 2026-05-11 | GTI802 | PVG → ANC | May 11, 19:35 UTC | May 12, 09:25 UTC | 13h 50m |
| 2026-05-09 | GTI804 | ORD → JFK | May 9, 07:30 UTC | May 9, 12:35 UTC | 5h 5m |
| 2026-05-08 | GTI804 | ORD → JFK | May 8, 22:50 UTC | May 9, 05:20 UTC | 6h 30m |
| 2026-05-07 | GTI803 | EZE → MIA | May 7, 18:30 UTC | May 8, 09:39 UTC | 15h 9m |
| 2026-05-06 | GTI804 | ORD → JFK | May 6, 23:35 UTC | May 7, 06:40 UTC | 7h 5m |
| 2026-05-04 | GTI802 | PVG → ANC | May 4, 21:20 UTC | May 5, 10:00 UTC | 12h 40m |
| 2026-05-02 | GTI801 | TLV → LGG | May 2, 21:35 UTC | May 3, 12:40 UTC | 15h 4m |
| 2026-05-02 | GTI804 | ORD → JFK | May 2, 13:00 UTC | May 2, 18:05 UTC | 5h 5m |
| 2026-05-01 | GTI804 | ORD → JFK | May 1, 21:05 UTC | May 2, 11:10 UTC | 14h 5m |
| 2026-04-30 | GTI803 | EZE → MIA | Apr 30, 21:50 UTC | May 1, 11:40 UTC | 13h 50m |
| 2026-04-30 | GTI804 | ORD → JFK | Apr 30, 13:20 UTC | Apr 30, 18:30 UTC | 5h 10m |
| 2026-04-29 | GTI804 | ORD → JFK | Apr 29, 20:50 UTC | Apr 30, 11:15 UTC | 14h 24m |
| 2026-04-28 | GTI803 | EZE → MIA | Apr 28, 23:54 UTC | Apr 29, 13:55 UTC | 14h 1m |
| 2026-04-28 | GTI802 | PVG → ANC | Apr 28, 07:45 UTC | Apr 28, 13:05 UTC | 5h 20m |
| 2026-04-27 | GTI802 | PVG → ANC | Apr 27, 16:05 UTC | Apr 28, 06:00 UTC | 13h 55m |
| 2026-04-25 | GTI801 | TLV → LGG | Apr 25, 22:40 UTC | Apr 26, 12:35 UTC | 13h 55m |
| 2026-04-25 | GTI804 | ORD → JFK | Apr 25, 12:30 UTC | Apr 25, 17:55 UTC | 5h 25m |
| 2026-04-24 | GTI804 | ORD → JFK | Apr 24, 20:30 UTC | Apr 25, 10:25 UTC | 13h 55m |
| 2026-04-24 | GTI803 | EZE → MIA | Apr 24, 00:35 UTC | Apr 24, 14:25 UTC | 13h 50m |
| 2026-04-23 | GTI804 | ORD → JFK | Apr 23, 15:35 UTC | Apr 23, 20:55 UTC | 5h 19m |
| 2026-04-22 | GTI804 | ORD → JFK | Apr 22, 23:30 UTC | Apr 23, 13:20 UTC | 13h 50m |
| 2026-04-22 | GTI803 | EZE → MIA | Apr 22, 06:50 UTC | Apr 22, 21:00 UTC | 14h 10m |
| 2026-04-21 | GTI802 | PVG → ANC | Apr 21, 21:55 UTC | Apr 22, 02:45 UTC | 4h 50m |
| 2026-04-21 | GTI802 | PVG → ANC | Apr 21, 08:15 UTC | Apr 21, 20:15 UTC | 12h 0m |
| 2026-04-20 | GTI801 | TLV → LGG | Apr 20, 15:25 UTC | Apr 21, 05:35 UTC | 14h 10m |
| 2026-04-20 | GTI8994 | IND → HHN | Apr 20, 07:20 UTC | Apr 20, 12:15 UTC | 4h 55m |
| 2026-04-19 | GTI8994 | IND → HHN | Apr 19, 20:45 UTC | Apr 20, 05:00 UTC | 8h 15m |
| 2026-04-18 | GTI8993 | ORD → ICN | Apr 18, 22:40 UTC | Apr 19, 12:35 UTC | 13h 55m |
| 2026-04-18 | GTI804 | ORD → JFK | Apr 18, 13:20 UTC | Apr 18, 18:30 UTC | 5h 10m |
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 N854GT page for operator, model, and routing details .