Apparatus

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sensors Mode-S transponder

A34DEF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N31171 · SWEARINGEN Metro · operated by CBG LLC

Hex
A34DEF
Octal
50646757
Decimal
10,702,319
Country
US
Tail
N31171
Type
SW4
No current signal · last broadcast 5h ago
Flights observed
97
Distinct callsigns
18
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A34DEF.

Country allocation

The ICAO 24-bit address A34DEF 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 18 distinct

Callsign Airline Flights Last seen
LYM593 - 21 2026-07-14
LYM640 - 20 2026-06-24
LYM820 Key Lime Air 12 2026-05-25
LYM507 - 8 2026-06-22
LYM414 - 6 2026-06-19
LYM416 Key Lime Air 5 2026-05-23
LYM404 Key Lime Air 5 2026-06-25
LYM143 - 5 2026-06-17
LYM530 Key Lime Air 3 2026-05-12
LYM777 Key Lime Air 2 2026-05-20
LYM356 Key Lime Air 2 2026-04-29
LYM292 Key Lime Air 2 2026-06-06
LYM704 Key Lime Air 1 2026-05-19
LYM674 Key Lime Air 1 2026-06-09
LYM593A - 1 2026-07-09
LYM242 Key Lime Air 1 2026-05-13
LYM234 Key Lime Air 1 2026-04-22
LYM155 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 LYM593 - Jul 14, 01:20 UTCJul 14, 01:55 UTC35m
2026-07-13 LYM593 - Jul 13, 22:00 UTCJul 13, 22:30 UTC30m
2026-07-11 LYM593 - Jul 11, 16:10 UTCJul 11, 16:45 UTC35m
2026-07-11 LYM593 - Jul 11, 14:30 UTCJul 11, 15:00 UTC30m
2026-07-11 LYM593 - Jul 11, 01:30 UTCJul 11, 02:05 UTC35m
2026-07-10 LYM593 - Jul 10, 13:00 UTCJul 10, 13:30 UTC30m
2026-07-10 LYM593 - Jul 10, 01:50 UTCJul 10, 02:30 UTC40m
2026-07-09 LYM593 - Jul 9, 13:05 UTCJul 9, 13:35 UTC30m
2026-07-09 LYM593A - Jul 9, 02:30 UTCJul 9, 03:05 UTC35m
2026-07-08 LYM593 - Jul 8, 13:00 UTCJul 8, 13:30 UTC30m
2026-07-08 LYM593 - Jul 8, 01:25 UTCJul 8, 02:00 UTC35m
2026-07-07 LYM593 - Jul 7, 13:20 UTCJul 7, 13:50 UTC30m
2026-07-07 LYM593 - Jul 7, 01:45 UTCJul 7, 02:20 UTC35m
2026-07-07 LYM593 - Jul 7, 00:05 UTCJul 7, 00:40 UTC35m
2026-06-25 LYM404 DEN → GXY Jun 25, 01:40 UTCJun 25, 02:49 UTC1h 10m
2026-06-24 LYM640 - Jun 24, 14:00 UTCJun 24, 15:09 UTC1h 10m
2026-06-24 LYM640 - Jun 24, 01:30 UTCJun 24, 02:15 UTC45m
2026-06-23 LYM640 - Jun 23, 13:34 UTCJun 23, 14:35 UTC1h 0m
2026-06-23 LYM640 - Jun 23, 01:15 UTCJun 23, 02:04 UTC50m
2026-06-22 LYM507 - Jun 22, 20:49 UTCJun 22, 21:59 UTC1h 10m
2026-06-20 LYM507 - Jun 20, 16:24 UTCJun 20, 17:10 UTC45m
2026-06-19 LYM414 - Jun 19, 01:50 UTCJun 19, 02:19 UTC30m
2026-06-18 LYM414 - Jun 18, 12:25 UTCJun 18, 12:50 UTC25m
2026-06-18 LYM640 - Jun 18, 01:20 UTCJun 18, 02:10 UTC50m
2026-06-17 LYM640 - Jun 17, 13:15 UTCJun 17, 14:25 UTC1h 10m
2026-06-17 LYM143 - Jun 17, 01:20 UTCJun 17, 02:10 UTC50m
2026-06-16 LYM640 - Jun 16, 13:30 UTCJun 16, 14:25 UTC55m
2026-06-16 LYM640 - Jun 16, 01:25 UTCJun 16, 02:15 UTC50m
2026-06-15 LYM143 - Jun 15, 20:40 UTCJun 15, 21:40 UTC1h 0m
2026-06-15 LYM404 DEN → GXY Jun 15, 17:40 UTCJun 15, 18:25 UTC45m
2026-06-15 LYM404 DEN → GXY Jun 15, 15:35 UTCJun 15, 16:09 UTC35m
2026-06-13 LYM143 GRK → DEN Jun 13, 15:10 UTCJun 13, 16:00 UTC50m
2026-06-13 LYM143 GRK → DEN Jun 13, 13:15 UTCJun 13, 14:05 UTC50m
2026-06-09 LYM674 APA → GJT Jun 9, 02:50 UTCJun 9, 03:15 UTC25m
2026-06-06 LYM292 DEN → MTJ Jun 6, 14:40 UTCJun 6, 14:50 UTC10m
2026-06-06 LYM292 DEN → MTJ Jun 6, 13:20 UTCJun 6, 13:44 UTC25m
2026-06-06 LYM640 RIW → DEN Jun 6, 01:20 UTCJun 6, 02:15 UTC55m
2026-06-05 LYM640 RIW → DEN Jun 5, 13:05 UTCJun 5, 14:05 UTC1h 0m
2026-06-05 LYM640 RIW → DEN Jun 5, 01:20 UTCJun 5, 02:20 UTC1h 0m
2026-06-04 LYM640 RIW → DEN Jun 4, 12:55 UTCJun 4, 14:00 UTC1h 5m
2026-06-04 LYM640 RIW → DEN Jun 4, 01:25 UTCJun 4, 02:20 UTC55m
2026-06-03 LYM640 RIW → DEN Jun 3, 12:45 UTCJun 3, 13:40 UTC55m
2026-06-03 LYM507 DEN → LBF Jun 3, 01:35 UTCJun 3, 02:10 UTC35m
2026-06-02 LYM640 RIW → DEN Jun 2, 13:10 UTCJun 2, 13:45 UTC35m
2026-05-30 LYM593 DEN → BFF May 30, 15:10 UTCMay 30, 16:00 UTC50m
2026-05-30 LYM593 DEN → BFF May 30, 13:20 UTCMay 30, 13:45 UTC25m
2026-05-30 LYM414 DEN → LBF May 30, 02:06 UTCMay 30, 02:40 UTC34m
2026-05-29 LYM414 DEN → LBF May 29, 12:35 UTCMay 29, 13:00 UTC25m
2026-05-29 LYM414 DEN → LBF May 29, 01:30 UTCMay 29, 01:55 UTC25m
2026-05-28 LYM414 DEN → LBF May 28, 12:45 UTCMay 28, 13:25 UTC40m

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 N31171 page for operator, model, and routing details .

Mode-S A34DEF frequently asked

What is Mode-S code A34DEF?
A34DEF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N31171.
Where is Mode-S A34DEF registered?
Mode-S code A34DEF 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 A34DEF broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A34DEF, octal 50646757, decimal 10,702,319.
What flights does A34DEF operate?
Mode-S A34DEF has broadcast 18 distinct callsigns, including LYM593, LYM640, LYM820, LYM507, LYM414.