sensors Mode-S transponder
A6DFFE
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N542GP · DASSAULT Falcon 7X · operated by AVIATION SERVICES THE FOURTH INC TRUSTEE
- Hex
- A6DFFE
- Octal
- 51557776
- Decimal
- 10,936,318
- Country
- US
- Tail
- N542GP
- Type
- FA7X
- Flights observed
- 66
- Distinct callsigns
- 2
- Country
- US
- Last broadcast
- 21d ago
Last known position
Country allocation
The ICAO 24-bit address A6DFFE 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 2 distinct
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | CLY107 | - | Jul 24, 01:45 UTC | Jul 24, 02:20 UTC | 35m |
| 2026-07-24 | CLY107 | - | Jul 24, 00:25 UTC | Jul 24, 01:00 UTC | 35m |
| 2026-07-23 | CLY107 | - | Jul 23, 21:05 UTC | Jul 23, 23:35 UTC | 2h 30m |
| 2026-07-22 | CLY107 | - | Jul 22, 23:35 UTC | Jul 23, 23:30 UTC | 23h 55m |
| 2026-07-22 | CLY107 | - | Jul 22, 22:15 UTC | Jul 23, 21:30 UTC | 23h 15m |
| 2026-07-20 | CLY107 | - | Jul 20, 11:05 UTC | Jul 20, 22:30 UTC | 11h 25m |
| 2026-07-16 | CLY107 | - | Jul 16, 19:20 UTC | Jul 16, 21:19 UTC | 2h 0m |
| 2026-07-16 | CLY107 | - | Jul 16, 16:30 UTC | Jul 16, 18:00 UTC | 1h 30m |
| 2026-07-13 | CLY107 | - | Jul 13, 11:55 UTC | Jul 13, 13:10 UTC | 1h 15m |
| 2026-07-12 | CLY107 | - | Jul 12, 21:15 UTC | Jul 12, 23:05 UTC | 1h 50m |
| 2026-07-12 | CLY107 | - | Jul 12, 19:35 UTC | Jul 12, 19:50 UTC | 15m |
| 2026-07-10 | CLY107 | - | Jul 10, 20:55 UTC | Jul 10, 21:10 UTC | 15m |
| 2026-07-10 | CLY107 | - | Jul 10, 19:05 UTC | Jul 10, 20:10 UTC | 1h 5m |
| 2026-07-10 | CLY107 | - | Jul 10, 13:05 UTC | Jul 10, 14:00 UTC | 55m |
| 2026-07-08 | CLY107 | - | Jul 8, 18:30 UTC | Jul 8, 19:15 UTC | 45m |
| 2026-07-03 | CLY107 | - | Jul 3, 17:25 UTC | Jul 3, 19:15 UTC | 1h 50m |
| 2026-07-02 | CLY107 | - | Jul 2, 22:45 UTC | Jul 2, 23:25 UTC | 40m |
| 2026-07-02 | CLY107 | - | Jul 2, 21:25 UTC | Jul 2, 21:50 UTC | 25m |
| 2026-06-24 | CLY107 | - | Jun 24, 13:40 UTC | Jun 24, 20:24 UTC | 6h 45m |
| 2026-06-21 | CLY107 | - | Jun 21, 23:30 UTC | Jun 22, 01:44 UTC | 2h 15m |
| 2026-06-21 | CLY107 | - | Jun 21, 20:34 UTC | Jun 21, 22:29 UTC | 1h 55m |
| 2026-06-21 | CLY107 | - | Jun 21, 19:00 UTC | Jun 21, 19:45 UTC | 45m |
| 2026-06-21 | CLY107 | - | Jun 21, 16:30 UTC | Jun 21, 16:49 UTC | 20m |
| 2026-06-19 | CLY107 | - | Jun 19, 12:49 UTC | Jun 19, 15:29 UTC | 2h 40m |
| 2026-06-18 | CLY107 | - | Jun 18, 18:45 UTC | Jun 18, 21:25 UTC | 2h 40m |
| 2026-06-18 | CLY107 | - | Jun 18, 14:25 UTC | Jun 18, 14:40 UTC | 15m |
| 2026-06-18 | CLY107 | - | Jun 18, 11:05 UTC | Jun 18, 13:30 UTC | 2h 25m |
| 2026-06-17 | CLY107 | - | Jun 17, 17:25 UTC | Jun 17, 19:55 UTC | 2h 30m |
| 2026-06-09 | CLY107 | - | Jun 9, 23:45 UTC | Jun 10, 00:05 UTC | 20m |
| 2026-06-09 | CLY107 | - | Jun 9, 22:25 UTC | Jun 9, 22:55 UTC | 30m |
| 2026-06-09 | CLY107 | - | Jun 9, 19:55 UTC | Jun 9, 21:55 UTC | 2h 0m |
| 2026-06-07 | CLY107 | BED → PNE | Jun 7, 19:15 UTC | Jun 7, 20:05 UTC | 50m |
| 2026-06-07 | CLY107 | - | Jun 7, 10:30 UTC | Jun 7, 18:00 UTC | 7h 30m |
| 2026-06-02 | CLY107 | - | Jun 2, 10:35 UTC | Jun 2, 11:30 UTC | 55m |
| 2026-05-30 | CLY107 | - | May 30, 11:40 UTC | May 30, 18:00 UTC | 6h 20m |
| 2026-05-30 | CLY107 | ACY → BED | May 30, 10:10 UTC | May 30, 11:05 UTC | 55m |
| 2026-05-29 | N542GP | - | May 29, 17:25 UTC | May 29, 17:55 UTC | 30m |
| 2026-05-28 | CLY107 | - | May 28, 15:30 UTC | May 29, 01:30 UTC | 10h 0m |
| 2026-05-27 | CLY107 | - | May 27, 22:15 UTC | May 27, 22:40 UTC | 25m |
| 2026-05-27 | CLY107 | - | May 27, 15:35 UTC | May 27, 17:45 UTC | 2h 10m |
| 2026-05-25 | CLY107 | - | May 25, 18:45 UTC | May 25, 21:04 UTC | 2h 19m |
| 2026-05-25 | CLY107 | YHU → HPN | May 25, 17:00 UTC | May 25, 17:50 UTC | 50m |
| 2026-05-25 | CLY107 | DUB → YHU | May 25, 10:10 UTC | May 25, 16:05 UTC | 5h 55m |
| 2026-05-24 | N542GP | - | May 24, 01:15 UTC | May 24, 07:05 UTC | 5h 50m |
| 2026-05-22 | N542GP | - | May 22, 20:15 UTC | May 22, 22:00 UTC | 1h 45m |
| 2026-05-21 | N542GP | - | May 21, 22:35 UTC | May 21, 22:40 UTC | 5m |
| 2026-05-21 | N542GP | - | May 21, 20:40 UTC | May 21, 21:40 UTC | 1h 0m |
| 2026-05-21 | N542GP | - | May 21, 13:01 UTC | May 21, 19:25 UTC | 6h 25m |
| 2026-05-17 | CLY107 | TPA → LTN | May 17, 14:55 UTC | May 17, 22:50 UTC | 7h 55m |
| 2026-05-17 | CLY107 | - | May 17, 13:20 UTC | May 17, 14:01 UTC | 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 N542GP page for operator, model, and routing details .