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sensors Mode-S transponder

A55944

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4438T · PIPER PA-44 Seminole · operated by ALF IX LLC

Hex
A55944
Octal
51254504
Decimal
10,836,292
Country
US
Tail
N4438T
Type
PA44
Broadcasting now · callsign N4438T · 8,575 ft
Flights observed
123
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Current position

A55944 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A55944 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
N4438T - 123 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N4438T - Jul 17, 02:30 UTCJul 17, 02:34 UTC5m
2026-07-17 N4438T BFL → BFL Jul 17, 01:29 UTCJul 17, 02:10 UTC40m
2026-07-17 N4438T - Jul 17, 00:14 UTCJul 17, 00:20 UTC5m
2026-07-16 N4438T BFL → BFL Jul 16, 23:59 UTCJul 17, 00:04 UTC5m
2026-07-16 N4438T BFL → BFL Jul 16, 23:10 UTCJul 16, 23:49 UTC40m
2026-07-16 N4438T - Jul 16, 17:45 UTCJul 16, 17:49 UTC5m
2026-07-16 N4438T BFL → BFL Jul 16, 16:44 UTCJul 16, 17:30 UTC45m
2026-07-15 N4438T BFL → BFL Jul 15, 23:15 UTCJul 16, 00:15 UTC1h 0m
2026-07-15 N4438T - Jul 15, 18:45 UTCJul 15, 18:50 UTC5m
2026-07-15 N4438T BFL → BFL Jul 15, 17:45 UTCJul 15, 18:35 UTC50m
2026-07-13 N4438T BFL → BFL Jul 13, 21:55 UTCJul 13, 22:00 UTC5m
2026-07-13 N4438T - Jul 13, 20:35 UTCJul 13, 21:35 UTC1h 0m
2026-07-10 N4438T BFL → BFL Jul 10, 21:00 UTCJul 10, 21:40 UTC40m
2026-07-09 N4438T BFL → BFL Jul 9, 15:55 UTCJul 9, 16:40 UTC45m
2026-07-08 N4438T - Jul 8, 17:05 UTCJul 8, 17:10 UTC5m
2026-07-08 N4438T BFL → BFL Jul 8, 16:15 UTCJul 8, 16:55 UTC40m
2026-07-07 N4438T BFL → BFL Jul 7, 20:40 UTCJul 7, 21:40 UTC1h 0m
2026-07-07 N4438T BFL → BFL Jul 7, 15:30 UTCJul 7, 15:35 UTC5m
2026-07-07 N4438T BFL → BFL Jul 7, 15:10 UTCJul 7, 15:15 UTC5m
2026-07-07 N4438T BFL → BFL Jul 7, 14:15 UTCJul 7, 15:00 UTC45m
2026-07-07 N4438T BFL → BFL Jul 7, 01:40 UTCJul 7, 02:15 UTC35m
2026-07-06 N4438T - Jul 6, 23:10 UTCJul 7, 00:40 UTC1h 30m
2026-07-06 N4438T - Jul 6, 22:40 UTCJul 6, 23:00 UTC20m
2026-07-06 N4438T BFL → SBA Jul 6, 21:55 UTCJul 6, 22:30 UTC35m
2026-07-06 N4438T BFL → BFL Jul 6, 19:10 UTCJul 6, 19:20 UTC10m
2026-07-06 N4438T BFL → BFL Jul 6, 18:20 UTCJul 6, 19:00 UTC40m
2026-07-03 N4438T BFL → BFL Jul 3, 23:55 UTCJul 4, 00:00 UTC5m
2026-07-03 N4438T BFL → BFL Jul 3, 22:45 UTCJul 3, 23:45 UTC1h 0m
2026-07-03 N4438T BFL → BFL Jul 3, 18:40 UTCJul 3, 19:15 UTC35m
2026-07-03 N4438T BFL → BFL Jul 3, 01:30 UTCJul 3, 02:30 UTC1h 0m
2026-07-02 N4438T SBA → BFL Jul 2, 22:05 UTCJul 2, 22:40 UTC35m
2026-07-02 N4438T BFL → SBA Jul 2, 21:05 UTCJul 2, 21:50 UTC45m
2026-07-02 N4438T - Jul 2, 17:15 UTCJul 2, 17:20 UTC5m
2026-07-02 N4438T BFL → BFL Jul 2, 16:20 UTCJul 2, 17:05 UTC45m
2026-07-02 N4438T - Jul 2, 02:15 UTCJul 2, 02:20 UTC5m
2026-07-02 N4438T BFL → BFL Jul 2, 02:00 UTCJul 2, 02:05 UTC5m
2026-07-02 N4438T BFL → BFL Jul 2, 01:05 UTCJul 2, 01:55 UTC50m
2026-07-01 N4438T - Jul 1, 23:45 UTCJul 1, 23:50 UTC5m
2026-07-01 N4438T BFL → BFL Jul 1, 22:55 UTCJul 1, 23:35 UTC40m
2026-07-01 N4438T - Jul 1, 20:40 UTCJul 1, 21:25 UTC45m
2026-07-01 N4438T BFL → BFL Jul 1, 19:50 UTCJul 1, 19:55 UTC5m
2026-07-01 N4438T BFL → BFL Jul 1, 18:50 UTCJul 1, 19:40 UTC50m
2026-07-01 N4438T BFL → BFL Jul 1, 03:05 UTCJul 1, 03:10 UTC5m
2026-07-01 N4438T BFL → BFL Jul 1, 02:05 UTCJul 1, 02:45 UTC40m
2026-06-30 N4438T - Jun 30, 23:55 UTCJul 1, 01:00 UTC1h 5m
2026-06-30 N4438T - Jun 30, 21:10 UTCJun 30, 22:15 UTC1h 5m
2026-06-30 N4438T BFL → BFL Jun 30, 19:10 UTCJun 30, 20:10 UTC1h 0m
2026-06-30 N4438T BFL → BFL Jun 30, 17:35 UTCJun 30, 17:40 UTC5m
2026-06-30 N4438T BFL → BFL Jun 30, 16:40 UTCJun 30, 17:25 UTC45m
2026-06-30 N4438T BFL → BFL Jun 30, 15:15 UTCJun 30, 15:30 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 N4438T page for operator, model, and routing details .

Mode-S A55944 frequently asked

What is Mode-S code A55944?
A55944 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4438T.
Where is Mode-S A55944 registered?
Mode-S code A55944 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 A55944 broadcasting right now?
Yes. Mode-S A55944 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A55944, octal 51254504, decimal 10,836,292.
What flights does A55944 operate?
Mode-S A55944 has broadcast 1 distinct callsign, including N4438T.