Apparatus

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sensors Mode-S transponder

A37D0D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3239E · CESSNA 172 Skyhawk · operated by LEAF AIR LLC

Hex
A37D0D
Octal
50676415
Decimal
10,714,381
Country
US
Tail
N3239E
Type
C172
No current signal · last broadcast 5d ago
Flights observed
54
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S A37D0D.

Country allocation

The ICAO 24-bit address A37D0D 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 1 distinct

Callsign Airline Flights Last seen
N3239E - 54 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N3239E - Jul 15, 18:10 UTCJul 15, 18:40 UTC30m
2026-07-14 N3239E - Jul 14, 15:05 UTCJul 14, 15:30 UTC25m
2026-07-13 N3239E - Jul 13, 19:15 UTCJul 13, 19:30 UTC15m
2026-07-01 N3239E - Jul 1, 14:25 UTCJul 1, 14:35 UTC10m
2026-06-28 N3239E - Jun 28, 17:00 UTCJun 28, 17:25 UTC25m
2026-06-28 N3239E - Jun 28, 16:39 UTCJun 28, 16:55 UTC15m
2026-06-24 N3239E - Jun 24, 17:34 UTCJun 24, 18:29 UTC55m
2026-06-24 N3239E - Jun 24, 16:59 UTCJun 24, 17:25 UTC25m
2026-06-23 N3239E - Jun 23, 20:44 UTCJun 23, 22:19 UTC1h 35m
2026-06-23 N3239E - Jun 23, 18:39 UTCJun 23, 19:59 UTC1h 20m
2026-06-21 N3239E - Jun 21, 16:39 UTCJun 21, 17:10 UTC30m
2026-06-21 N3239E - Jun 21, 14:40 UTCJun 21, 14:59 UTC20m
2026-06-21 N3239E - Jun 21, 13:04 UTCJun 21, 13:20 UTC15m
2026-06-16 N3239E - Jun 16, 14:45 UTCJun 16, 15:00 UTC15m
2026-06-16 N3239E LEB → LEB Jun 16, 14:15 UTCJun 16, 14:25 UTC10m
2026-06-16 N3239E - Jun 16, 13:00 UTCJun 16, 13:44 UTC45m
2026-06-13 N3239E - Jun 13, 13:05 UTCJun 13, 14:25 UTC1h 20m
2026-06-12 N3239E - Jun 12, 16:25 UTCJun 12, 16:35 UTC10m
2026-06-12 N3239E - Jun 12, 15:30 UTCJun 12, 15:40 UTC10m
2026-06-09 N3239E - Jun 9, 20:05 UTCJun 9, 20:25 UTC20m
2026-06-09 N3239E LEB → LEB Jun 9, 19:25 UTCJun 9, 19:35 UTC10m
2026-06-09 N3239E - Jun 9, 18:50 UTCJun 9, 19:20 UTC30m
2026-06-09 N3239E - Jun 9, 17:05 UTCJun 9, 17:15 UTC10m
2026-06-09 N3239E - Jun 9, 14:15 UTCJun 9, 14:30 UTC15m
2026-06-08 N3239E - Jun 8, 17:55 UTCJun 8, 18:15 UTC20m
2026-06-08 N3239E - Jun 8, 13:30 UTCJun 8, 14:55 UTC1h 25m
2026-06-05 N3239E - Jun 5, 18:40 UTCJun 5, 19:50 UTC1h 10m
2026-06-05 N3239E - Jun 5, 15:35 UTCJun 5, 16:45 UTC1h 10m
2026-06-05 N3239E - Jun 5, 13:50 UTCJun 5, 14:20 UTC30m
2026-06-03 N3239E - Jun 3, 19:45 UTCJun 3, 21:05 UTC1h 20m
2026-06-03 N3239E - Jun 3, 16:20 UTCJun 3, 18:00 UTC1h 40m
2026-06-02 N3239E - Jun 2, 15:55 UTCJun 2, 16:15 UTC20m
2026-05-28 N3239E - May 28, 13:50 UTCMay 28, 14:30 UTC40m
2026-05-21 N3239E - May 21, 18:25 UTCMay 21, 19:05 UTC40m
2026-05-18 N3239E - May 18, 17:40 UTCMay 18, 18:30 UTC49m
2026-05-05 N3239E - May 5, 01:55 UTCMay 5, 02:20 UTC25m
2026-05-05 N3239E - May 5, 00:30 UTCMay 5, 00:45 UTC15m
2026-04-26 N3239E - Apr 26, 19:10 UTCApr 26, 20:10 UTC1h 0m
2026-04-26 N3239E - Apr 26, 14:30 UTCApr 26, 15:35 UTC1h 5m
2026-04-25 N3239E - Apr 25, 17:35 UTCApr 25, 17:50 UTC15m
2026-04-25 N3239E - Apr 25, 01:55 UTCApr 25, 02:35 UTC40m
2026-04-24 N3239E - Apr 24, 23:55 UTCApr 25, 00:50 UTC55m
2026-04-22 N3239E - Apr 22, 02:00 UTCApr 22, 03:00 UTC1h 0m
2026-04-22 N3239E - Apr 22, 00:10 UTCApr 22, 00:55 UTC45m
2026-04-21 N3239E - Apr 21, 17:45 UTCApr 21, 18:25 UTC40m
2026-04-21 N3239E LEB → LEB Apr 21, 16:55 UTCApr 21, 17:05 UTC10m
2026-04-21 N3239E LEB → LEB Apr 21, 16:40 UTCApr 21, 16:50 UTC10m
2026-04-21 N3239E LEB → LEB Apr 21, 16:15 UTCApr 21, 16:25 UTC10m
2026-04-21 N3239E - Apr 21, 15:35 UTCApr 21, 16:10 UTC35m
2026-04-20 N3239E - Apr 20, 14:40 UTCApr 20, 15:00 UTC20m

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 N3239E page for operator, model, and routing details .

Mode-S A37D0D frequently asked

What is Mode-S code A37D0D?
A37D0D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3239E.
Where is Mode-S A37D0D registered?
Mode-S code A37D0D 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 A37D0D broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37D0D, octal 50676415, decimal 10,714,381.
What flights does A37D0D operate?
Mode-S A37D0D has broadcast 1 distinct callsign, including N3239E.