Apparatus

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sensors Mode-S transponder

A6DFD8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N542FA · SWEARINGEN Metro · operated by CBG LLC

Hex
A6DFD8
Octal
51557730
Decimal
10,936,280
Country
US
Tail
N542FA
Type
SW4
No current signal · last broadcast 4d ago
Flights observed
91
Distinct callsigns
12
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A6DFD8.

Country allocation

The ICAO 24-bit address A6DFD8 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 12 distinct

Callsign Airline Flights Last seen
LYM414 - 34 2026-07-11
LYM593 - 29 2026-07-04
LYM640 - 10 2026-07-14
LYM640A - 4 2026-07-13
LYM137 - 4 2026-07-10
LYM711 - 3 2026-07-11
LYM510 - 2 2026-06-15
LYM777 Key Lime Air 1 2026-05-11
LYM717 Key Lime Air 1 2026-05-07
LYM404 Key Lime Air 1 2026-06-13
LYM143 Key Lime Air 1 2026-06-09
LYM117 Key Lime Air 1 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 LYM640 - Jul 14, 01:25 UTCJul 14, 02:15 UTC50m
2026-07-13 LYM640A - Jul 13, 20:40 UTCJul 13, 21:45 UTC1h 5m
2026-07-11 LYM711 - Jul 11, 16:20 UTCJul 11, 17:15 UTC55m
2026-07-11 LYM640A - Jul 11, 14:30 UTCJul 11, 15:10 UTC40m
2026-07-11 LYM414 - Jul 11, 01:35 UTCJul 11, 02:00 UTC25m
2026-07-10 LYM414 - Jul 10, 12:30 UTCJul 10, 13:05 UTC35m
2026-07-10 LYM137 - Jul 10, 01:40 UTCJul 10, 02:15 UTC35m
2026-07-09 LYM137 - Jul 9, 12:35 UTCJul 9, 13:15 UTC40m
2026-07-04 LYM593 - Jul 4, 01:10 UTCJul 4, 02:00 UTC50m
2026-07-03 LYM593 - Jul 3, 12:40 UTCJul 3, 13:10 UTC30m
2026-07-03 LYM593 - Jul 3, 02:10 UTCJul 3, 03:00 UTC50m
2026-07-02 LYM593 - Jul 2, 12:50 UTCJul 2, 13:15 UTC25m
2026-07-01 LYM640 - Jul 1, 02:00 UTCJul 1, 03:00 UTC1h 0m
2026-06-30 LYM640 - Jun 30, 13:40 UTCJun 30, 14:30 UTC50m
2026-06-30 LYM640 - Jun 30, 01:19 UTCJun 30, 02:15 UTC56m
2026-06-29 LYM640A - Jun 29, 21:14 UTCJun 29, 22:15 UTC1h 0m
2026-06-27 LYM640 - Jun 27, 16:24 UTCJun 27, 17:25 UTC1h 0m
2026-06-27 LYM640A - Jun 27, 14:29 UTCJun 27, 15:24 UTC55m
2026-06-27 LYM640 - Jun 27, 01:24 UTCJun 27, 02:25 UTC1h 0m
2026-06-26 LYM640 - Jun 26, 13:04 UTCJun 26, 14:05 UTC1h 0m
2026-06-26 LYM640 - Jun 26, 01:24 UTCJun 26, 02:40 UTC1h 15m
2026-06-25 LYM640 - Jun 25, 13:24 UTCJun 25, 14:20 UTC55m
2026-06-20 LYM137 DEN → GXY Jun 20, 16:14 UTCJun 20, 16:49 UTC35m
2026-06-20 LYM593 - Jun 20, 01:24 UTCJun 20, 02:00 UTC35m
2026-06-19 LYM593 - Jun 19, 12:49 UTCJun 19, 13:20 UTC30m
2026-06-19 LYM593 - Jun 19, 01:39 UTCJun 19, 02:14 UTC35m
2026-06-18 LYM593 - Jun 18, 13:15 UTCJun 18, 13:40 UTC25m
2026-06-18 LYM593 - Jun 18, 01:35 UTCJun 18, 02:15 UTC40m
2026-06-17 LYM593 - Jun 17, 13:10 UTCJun 17, 13:40 UTC30m
2026-06-17 LYM593 - Jun 17, 01:25 UTCJun 17, 02:05 UTC40m
2026-06-16 LYM593 - Jun 16, 13:25 UTCJun 16, 13:55 UTC30m
2026-06-15 LYM510 - Jun 15, 04:15 UTCJun 15, 04:20 UTC5m
2026-06-15 LYM510 DEN → APA Jun 15, 03:30 UTCJun 15, 03:45 UTC15m
2026-06-13 LYM404 DEN → GXY Jun 13, 01:20 UTCJun 13, 01:50 UTC30m
2026-06-12 LYM414 DEN → LBF Jun 12, 12:40 UTCJun 12, 13:10 UTC30m
2026-06-12 LYM414 DEN → LBF Jun 12, 01:05 UTCJun 12, 01:35 UTC30m
2026-06-11 LYM414 DEN → LBF Jun 11, 12:40 UTCJun 11, 13:10 UTC30m
2026-06-11 LYM593 DEN → BFF Jun 11, 01:30 UTCJun 11, 02:10 UTC40m
2026-06-10 LYM593 DEN → BFF Jun 10, 13:25 UTCJun 10, 13:50 UTC25m
2026-06-10 LYM640 RIW → DEN Jun 10, 02:05 UTCJun 10, 02:50 UTC45m
2026-06-09 LYM143 GRK → DEN Jun 9, 23:00 UTCJun 9, 23:55 UTC55m
2026-06-03 LYM593 DEN → BFF Jun 3, 01:40 UTCJun 3, 02:10 UTC30m
2026-06-02 LYM137 DEN → GXY Jun 2, 13:15 UTCJun 2, 13:45 UTC30m
2026-06-02 LYM593 DEN → BFF Jun 2, 02:00 UTCJun 2, 02:30 UTC30m
2026-06-01 LYM117 DEN → CEZ Jun 1, 22:45 UTCJun 1, 23:15 UTC30m
2026-05-29 LYM593 DEN → BFF May 29, 01:50 UTCMay 29, 02:25 UTC35m
2026-05-28 LYM593 DEN → BFF May 28, 13:30 UTCMay 28, 14:00 UTC30m
2026-05-28 LYM593 DEN → BFF May 28, 01:40 UTCMay 28, 02:20 UTC40m
2026-05-27 LYM593 DEN → BFF May 27, 13:10 UTCMay 27, 13:35 UTC25m
2026-05-27 LYM414 DEN → LBF May 27, 01:24 UTCMay 27, 01:49 UTC25m

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 N542FA page for operator, model, and routing details .

Mode-S A6DFD8 frequently asked

What is Mode-S code A6DFD8?
A6DFD8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N542FA.
Where is Mode-S A6DFD8 registered?
Mode-S code A6DFD8 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A6DFD8 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6DFD8, octal 51557730, decimal 10,936,280.
What flights does A6DFD8 operate?
Mode-S A6DFD8 has broadcast 12 distinct callsigns, including LYM414, LYM593, LYM640, LYM640A, LYM137.