Apparatus

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sensors Mode-S transponder

A437D0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N371DC · PIPER PA-28-140/150/160/180 · operated by SKYBORNE AIRLINE ACADEMY INC

Hex
A437D0
Octal
51033720
Decimal
10,762,192
Country
US
Tail
N371DC
Type
P28A
No current signal · last broadcast 16m ago
Flights observed
254
Distinct callsigns
1
Country
US
Last broadcast
16m ago

Last known position

Most recent position reported by Mode-S A437D0.

Country allocation

The ICAO 24-bit address A437D0 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
SFY204 - 251 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SFY204 - Jul 14, 18:50 UTCJul 14, 19:50 UTC1h 0m
2026-07-14 SFY204 - Jul 14, 16:20 UTCJul 14, 17:10 UTC50m
2026-07-14 SFY204 - Jul 14, 13:40 UTCJul 14, 14:25 UTC45m
2026-07-14 SFY204 - Jul 14, 11:25 UTCJul 14, 12:05 UTC40m
2026-07-13 SFY204 - Jul 13, 20:10 UTCJul 13, 21:35 UTC1h 25m
2026-07-13 SFY204 - Jul 13, 11:10 UTCJul 13, 12:00 UTC50m
2026-07-12 SFY204 - Jul 12, 13:25 UTCJul 12, 14:10 UTC45m
2026-07-12 SFY204 - Jul 12, 11:20 UTCJul 12, 12:25 UTC1h 5m
2026-07-12 SFY204 VRB → VRB Jul 12, 01:35 UTCJul 12, 02:20 UTC45m
2026-07-11 SFY204 - Jul 11, 22:25 UTCJul 11, 23:05 UTC40m
2026-07-11 SFY204 - Jul 11, 13:35 UTCJul 11, 14:50 UTC1h 15m
2026-07-11 SFY204 - Jul 11, 10:55 UTCJul 11, 12:00 UTC1h 5m
2026-07-10 SFY204 - Jul 10, 22:25 UTCJul 10, 23:25 UTC1h 0m
2026-07-10 SFY204 - Jul 10, 17:25 UTCJul 10, 17:55 UTC30m
2026-07-10 SFY204 - Jul 10, 14:20 UTCJul 10, 15:00 UTC40m
2026-07-10 SFY204 - Jul 10, 10:50 UTCJul 10, 12:05 UTC1h 15m
2026-07-09 SFY204 - Jul 9, 20:40 UTCJul 9, 21:40 UTC1h 0m
2026-07-09 SFY204 - Jul 9, 18:35 UTCJul 9, 19:00 UTC25m
2026-07-09 SFY204 - Jul 9, 13:55 UTCJul 9, 14:35 UTC40m
2026-07-09 SFY204 - Jul 9, 11:45 UTCJul 9, 12:35 UTC50m
2026-07-08 SFY204 - Jul 8, 20:30 UTCJul 8, 21:40 UTC1h 10m
2026-07-08 SFY204 - Jul 8, 18:35 UTCJul 8, 19:20 UTC45m
2026-07-08 SFY204 - Jul 8, 17:10 UTCJul 8, 17:20 UTC10m
2026-07-08 SFY204 - Jul 8, 16:00 UTCJul 8, 16:20 UTC20m
2026-07-08 SFY204 - Jul 8, 01:40 UTCJul 8, 02:15 UTC35m
2026-07-07 SFY204 - Jul 7, 22:50 UTCJul 8, 00:25 UTC1h 35m
2026-07-07 SFY204 - Jul 7, 15:25 UTCJul 7, 16:25 UTC1h 0m
2026-07-07 SFY204 - Jul 7, 11:20 UTCJul 7, 12:30 UTC1h 10m
2026-07-07 SFY204 - Jul 7, 01:25 UTCJul 7, 02:15 UTC50m
2026-07-06 SFY204 - Jul 6, 15:40 UTCJul 6, 16:40 UTC1h 0m
2026-07-06 SFY204 - Jul 6, 11:25 UTCJul 6, 12:20 UTC55m
2026-07-05 SFY204 - Jul 5, 19:05 UTCJul 5, 19:30 UTC25m
2026-07-05 SFY204 - Jul 5, 18:00 UTCJul 5, 18:30 UTC30m
2026-07-05 SFY204 - Jul 5, 14:35 UTCJul 5, 15:05 UTC30m
2026-07-05 SFY204 - Jul 5, 12:05 UTCJul 5, 12:30 UTC25m
2026-07-05 SFY204 - Jul 5, 01:15 UTCJul 5, 02:30 UTC1h 15m
2026-07-04 SFY204 - Jul 4, 11:25 UTCJul 4, 12:15 UTC50m
2026-07-03 SFY204 - Jul 3, 01:35 UTCJul 3, 02:10 UTC35m
2026-07-02 SFY204 - Jul 2, 22:00 UTCJul 2, 23:00 UTC1h 0m
2026-07-02 SFY204 - Jul 2, 19:30 UTCJul 2, 20:35 UTC1h 5m
2026-07-02 SFY204 - Jul 2, 11:55 UTCJul 2, 12:50 UTC55m
2026-07-01 SFY204 - Jul 1, 22:25 UTCJul 1, 23:40 UTC1h 15m
2026-06-30 SFY204 - Jun 30, 01:25 UTCJun 30, 04:10 UTC2h 46m
2026-06-29 SFY204 - Jun 29, 14:09 UTCJun 29, 14:34 UTC25m
2026-06-29 SFY204 - Jun 29, 10:40 UTCJun 29, 12:00 UTC1h 20m
2026-06-29 SFY204 - Jun 29, 01:14 UTCJun 29, 03:44 UTC2h 30m
2026-06-28 SFY204 - Jun 28, 17:00 UTCJun 28, 18:05 UTC1h 5m
2026-06-28 SFY204 - Jun 28, 14:54 UTCJun 28, 15:49 UTC55m
2026-06-28 SFY204 - Jun 28, 10:55 UTCJun 28, 12:09 UTC1h 15m
2026-06-27 SFY204 - Jun 27, 23:10 UTCJun 28, 00:09 UTC1h 0m

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 N371DC page for operator, model, and routing details .

Mode-S A437D0 frequently asked

What is Mode-S code A437D0?
A437D0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N371DC.
Where is Mode-S A437D0 registered?
Mode-S code A437D0 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 A437D0 broadcasting right now?
No active broadcast right now. Last signal was 16m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A437D0, octal 51033720, decimal 10,762,192.
What flights does A437D0 operate?
Mode-S A437D0 has broadcast 1 distinct callsign, including SFY204.