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sensors Mode-S transponder

A6E6D4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N544AM · AEROSPATIALE AS-350 Ecureuil · operated by AIR METHODS LLC

Hex
A6E6D4
Octal
51563324
Decimal
10,938,068
Country
US
Tail
N544AM
Type
AS50
No current signal · last broadcast Jul 25, 03:20 UTC
Flights observed
138
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 03:20 UTC

Last known position

Most recent position reported by Mode-S A6E6D4.

Country allocation

The ICAO 24-bit address A6E6D4 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
N544AM - 138 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N544AM - Jul 25, 02:20 UTCJul 25, 03:20 UTC1h 0m
2026-07-24 N544AM - Jul 24, 20:20 UTCJul 24, 20:50 UTC30m
2026-07-24 N544AM - Jul 24, 19:25 UTCJul 24, 19:45 UTC20m
2026-07-24 N544AM - Jul 24, 16:40 UTCJul 24, 17:50 UTC1h 10m
2026-07-23 N544AM - Jul 23, 21:20 UTCJul 23, 22:35 UTC1h 15m
2026-07-22 N544AM - Jul 22, 20:10 UTCJul 22, 20:35 UTC25m
2026-07-22 N544AM - Jul 22, 19:20 UTCJul 22, 19:35 UTC15m
2026-07-21 N544AM - Jul 21, 12:55 UTCJul 21, 14:10 UTC1h 15m
2026-07-20 N544AM - Jul 20, 21:45 UTCJul 20, 22:15 UTC30m
2026-07-20 N544AM - Jul 20, 20:30 UTCJul 20, 20:45 UTC15m
2026-07-19 N544AM - Jul 19, 08:20 UTCJul 19, 09:25 UTC1h 5m
2026-07-19 N544AM - Jul 19, 07:05 UTCJul 19, 07:25 UTC20m
2026-07-18 N544AM - Jul 18, 05:30 UTCJul 18, 05:45 UTC15m
2026-07-17 N544AM - Jul 17, 17:09 UTCJul 17, 17:25 UTC15m
2026-07-17 N544AM - Jul 17, 06:20 UTCJul 17, 08:04 UTC1h 45m
2026-07-16 N544AM - Jul 16, 19:30 UTCJul 16, 20:29 UTC1h 0m
2026-07-16 N544AM - Jul 16, 18:34 UTCJul 16, 18:44 UTC10m
2026-07-15 N544AM - Jul 15, 03:55 UTCJul 15, 04:30 UTC35m
2026-07-15 N544AM - Jul 15, 02:30 UTCJul 15, 03:20 UTC50m
2026-07-14 N544AM - Jul 14, 19:55 UTCJul 14, 20:30 UTC35m
2026-07-14 N544AM - Jul 14, 19:05 UTCJul 14, 19:15 UTC10m
2026-07-12 N544AM - Jul 12, 15:30 UTCJul 12, 15:50 UTC20m
2026-07-09 N544AM - Jul 9, 17:00 UTCJul 9, 18:25 UTC1h 25m
2026-07-09 N544AM - Jul 9, 15:50 UTCJul 9, 16:05 UTC15m
2026-07-07 N544AM - Jul 7, 20:05 UTCJul 7, 20:15 UTC10m
2026-07-07 N544AM - Jul 7, 18:40 UTCJul 7, 18:55 UTC15m
2026-07-06 N544AM - Jul 6, 06:40 UTCJul 6, 07:05 UTC25m
2026-07-06 N544AM - Jul 6, 05:05 UTCJul 6, 05:30 UTC25m
2026-07-05 N544AM - Jul 5, 17:55 UTCJul 5, 18:10 UTC15m
2026-07-05 N544AM - Jul 5, 16:35 UTCJul 5, 16:50 UTC15m
2026-07-05 N544AM - Jul 5, 04:50 UTCJul 5, 05:20 UTC30m
2026-07-05 N544AM - Jul 5, 03:40 UTCJul 5, 04:00 UTC20m
2026-07-04 N544AM - Jul 4, 17:10 UTCJul 4, 18:25 UTC1h 15m
2026-07-04 N544AM - Jul 4, 06:10 UTCJul 4, 06:40 UTC30m
2026-07-04 N544AM - Jul 4, 05:05 UTCJul 4, 05:30 UTC25m
2026-07-03 N544AM - Jul 3, 19:20 UTCJul 3, 19:40 UTC20m
2026-07-03 N544AM - Jul 3, 18:40 UTCJul 3, 18:50 UTC10m
2026-07-03 N544AM - Jul 3, 02:00 UTCJul 3, 02:30 UTC30m
2026-07-03 N544AM - Jul 3, 01:00 UTCJul 3, 01:20 UTC20m
2026-07-02 N544AM - Jul 2, 23:30 UTCJul 2, 23:50 UTC20m
2026-07-02 N544AM - Jul 2, 22:20 UTCJul 2, 22:40 UTC20m
2026-07-02 N544AM - Jul 2, 06:51 UTCJul 2, 07:00 UTC9m
2026-07-02 N544AM - Jul 2, 05:35 UTCJul 2, 05:50 UTC15m
2026-07-02 N544AM - Jul 2, 04:25 UTCJul 2, 04:35 UTC10m
2026-07-01 N544AM - Jul 1, 22:45 UTCJul 1, 23:15 UTC30m
2026-07-01 N544AM - Jul 1, 21:50 UTCJul 1, 22:05 UTC15m
2026-07-01 N544AM - Jul 1, 10:15 UTCJul 1, 11:25 UTC1h 10m
2026-07-01 N544AM - Jul 1, 02:35 UTCJul 1, 03:40 UTC1h 5m
2026-06-28 N544AM - Jun 28, 18:40 UTCJun 28, 19:09 UTC30m
2026-06-28 N544AM - Jun 28, 17:44 UTCJun 28, 18:00 UTC15m

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 N544AM page for operator, model, and routing details .

Mode-S A6E6D4 frequently asked

What is Mode-S code A6E6D4?
A6E6D4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N544AM.
Where is Mode-S A6E6D4 registered?
Mode-S code A6E6D4 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 A6E6D4 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 03:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6E6D4, octal 51563324, decimal 10,938,068.
What flights does A6E6D4 operate?
Mode-S A6E6D4 has broadcast 1 distinct callsign, including N544AM.