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sensors Mode-S transponder

A2578A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N250AM · operated by AIRBUS HELICOPTERS INC

Hex
A2578A
Octal
50453612
Decimal
10,639,242
Country
US
Tail
N250AM
Type
AS50
No current signal · last broadcast Jul 26, 16:55 UTC
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 16:55 UTC

Last known position

Most recent position reported by Mode-S A2578A.

Country allocation

The ICAO 24-bit address A2578A 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
N250AM - 112 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N250AM - Jul 26, 16:45 UTCJul 26, 16:55 UTC10m
2026-07-26 N250AM - Jul 26, 14:50 UTCJul 26, 15:00 UTC10m
2026-07-26 N250AM - Jul 26, 06:55 UTCJul 26, 07:20 UTC25m
2026-07-26 N250AM - Jul 26, 05:20 UTCJul 26, 05:40 UTC20m
2026-07-25 N250AM - Jul 25, 11:55 UTCJul 25, 12:55 UTC1h 0m
2026-07-25 N250AM - Jul 25, 11:05 UTCJul 25, 11:20 UTC15m
2026-07-23 N250AM - Jul 23, 08:45 UTCJul 23, 09:30 UTC45m
2026-07-23 N250AM - Jul 23, 07:50 UTCJul 23, 08:05 UTC15m
2026-07-21 N250AM - Jul 21, 20:45 UTCJul 21, 21:00 UTC15m
2026-07-21 N250AM - Jul 21, 18:25 UTCJul 21, 18:35 UTC10m
2026-07-21 N250AM - Jul 21, 16:15 UTCJul 21, 16:30 UTC15m
2026-07-21 N250AM - Jul 21, 14:30 UTCJul 21, 14:45 UTC15m
2026-07-21 N250AM - Jul 21, 06:10 UTCJul 21, 06:30 UTC20m
2026-07-21 N250AM - Jul 21, 05:00 UTCJul 21, 05:15 UTC15m
2026-07-20 N250AM - Jul 20, 18:10 UTCJul 20, 19:30 UTC1h 20m
2026-07-15 N250AM - Jul 15, 06:50 UTCJul 15, 07:45 UTC55m
2026-07-15 N250AM - Jul 15, 05:45 UTCJul 15, 06:05 UTC20m
2026-07-10 N250AM - Jul 10, 18:10 UTCJul 10, 18:25 UTC15m
2026-07-10 N250AM - Jul 10, 16:45 UTCJul 10, 16:55 UTC10m
2026-07-07 N250AM - Jul 7, 20:25 UTCJul 7, 20:40 UTC15m
2026-07-07 N250AM - Jul 7, 18:25 UTCJul 7, 18:40 UTC15m
2026-07-04 N250AM - Jul 4, 09:45 UTCJul 4, 10:30 UTC45m
2026-07-04 N250AM - Jul 4, 09:00 UTCJul 4, 09:10 UTC10m
2026-07-03 N250AM - Jul 3, 18:35 UTCJul 3, 19:25 UTC50m
2026-07-03 N250AM - Jul 3, 17:40 UTCJul 3, 17:50 UTC10m
2026-07-03 N250AM - Jul 3, 08:35 UTCJul 3, 09:10 UTC35m
2026-07-03 N250AM - Jul 3, 07:40 UTCJul 3, 08:00 UTC20m
2026-07-02 N250AM - Jul 2, 22:30 UTCJul 2, 22:40 UTC10m
2026-07-02 N250AM - Jul 2, 20:50 UTCJul 2, 21:05 UTC15m
2026-06-30 N250AM - Jun 30, 04:00 UTCJun 30, 04:30 UTC30m
2026-06-30 N250AM - Jun 30, 02:10 UTCJun 30, 02:25 UTC15m
2026-06-28 N250AM - Jun 28, 04:10 UTCJun 28, 04:35 UTC25m
2026-06-28 N250AM - Jun 28, 02:29 UTCJun 28, 02:44 UTC15m
2026-06-27 N250AM - Jun 27, 18:29 UTCJun 27, 19:55 UTC1h 25m
2026-06-27 N250AM - Jun 27, 06:15 UTCJun 27, 06:44 UTC30m
2026-06-27 N250AM - Jun 27, 04:34 UTCJun 27, 04:54 UTC20m
2026-06-24 N250AM - Jun 24, 05:09 UTCJun 24, 05:34 UTC25m
2026-06-24 N250AM - Jun 24, 03:10 UTCJun 24, 03:24 UTC15m
2026-06-21 N250AM - Jun 21, 05:59 UTCJun 21, 06:19 UTC20m
2026-06-21 N250AM - Jun 21, 05:20 UTCJun 21, 05:25 UTC5m
2026-06-21 N250AM - Jun 21, 04:20 UTCJun 21, 04:49 UTC30m
2026-06-20 N250AM - Jun 20, 05:34 UTCJun 20, 05:59 UTC25m
2026-06-20 N250AM - Jun 20, 03:49 UTCJun 20, 04:20 UTC30m
2026-06-18 N250AM - Jun 18, 06:50 UTCJun 18, 07:05 UTC15m
2026-06-18 N250AM - Jun 18, 04:45 UTCJun 18, 04:55 UTC10m
2026-06-17 N250AM - Jun 17, 05:35 UTCJun 17, 05:55 UTC20m
2026-06-17 N250AM - Jun 17, 04:15 UTCJun 17, 04:30 UTC15m
2026-06-16 N250AM - Jun 16, 22:50 UTCJun 16, 23:55 UTC1h 5m
2026-06-16 N250AM - Jun 16, 21:50 UTCJun 16, 22:05 UTC15m
2026-06-13 N250AM - Jun 13, 19:40 UTCJun 13, 20:05 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 N250AM page for operator, model, and routing details .

Mode-S A2578A frequently asked

What is Mode-S code A2578A?
A2578A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N250AM.
Where is Mode-S A2578A registered?
Mode-S code A2578A 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 A2578A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2578A, octal 50453612, decimal 10,639,242.
What flights does A2578A operate?
Mode-S A2578A has broadcast 1 distinct callsign, including N250AM.