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sensors Mode-S transponder

A72399

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N55928 · operated by TAO AVIATION LLC

Hex
A72399
Octal
51621631
Decimal
10,953,625
Country
US
Tail
N55928
Type
PA34
No current signal · last broadcast Jul 18, 05:50 UTC
Flights observed
174
Distinct callsigns
1
Country
US
Last broadcast
Jul 18, 05:50 UTC

Last known position

Most recent position reported by Mode-S A72399.

Country allocation

The ICAO 24-bit address A72399 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
N55928 - 174 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N55928 - Jul 18, 05:30 UTCJul 18, 05:50 UTC20m
2026-07-17 N55928 - Jul 17, 19:09 UTCJul 17, 20:04 UTC55m
2026-07-17 N55928 - Jul 17, 13:00 UTCJul 17, 13:50 UTC50m
2026-07-17 N55928 - Jul 17, 02:39 UTCJul 17, 03:14 UTC35m
2026-07-17 N55928 - Jul 17, 00:50 UTCJul 17, 01:09 UTC20m
2026-07-16 N55928 - Jul 16, 21:35 UTCJul 16, 21:50 UTC15m
2026-07-15 N55928 - Jul 15, 22:20 UTCJul 15, 23:35 UTC1h 15m
2026-07-15 N55928 - Jul 15, 17:15 UTCJul 15, 17:25 UTC10m
2026-07-15 N55928 - Jul 15, 16:05 UTCJul 15, 16:25 UTC20m
2026-07-14 N55928 - Jul 14, 22:55 UTCJul 14, 23:30 UTC35m
2026-07-14 N55928 - Jul 14, 20:20 UTCJul 14, 20:40 UTC20m
2026-07-14 N55928 - Jul 14, 01:25 UTCJul 14, 01:55 UTC30m
2026-07-13 N55928 - Jul 13, 20:10 UTCJul 13, 20:20 UTC10m
2026-07-13 N55928 - Jul 13, 19:25 UTCJul 13, 19:55 UTC30m
2026-07-12 N55928 - Jul 12, 20:20 UTCJul 12, 20:35 UTC15m
2026-07-12 N55928 - Jul 12, 19:35 UTCJul 12, 20:05 UTC30m
2026-07-03 N55928 - Jul 3, 18:05 UTCJul 3, 18:55 UTC50m
2026-07-01 N55928 - Jul 1, 20:00 UTCJul 1, 20:50 UTC50m
2026-06-30 N55928 - Jun 30, 20:00 UTCJun 30, 20:15 UTC15m
2026-06-30 N55928 - Jun 30, 15:30 UTCJun 30, 15:45 UTC15m
2026-06-30 N55928 - Jun 30, 02:15 UTCJun 30, 02:35 UTC20m
2026-06-30 N55928 - Jun 30, 00:55 UTCJun 30, 01:09 UTC15m
2026-06-29 N55928 - Jun 29, 23:34 UTCJun 30, 00:00 UTC25m
2026-06-29 N55928 - Jun 29, 21:34 UTCJun 29, 22:24 UTC50m
2026-06-29 N55928 - Jun 29, 00:34 UTCJun 29, 01:29 UTC55m
2026-06-28 N55928 - Jun 28, 20:54 UTCJun 28, 21:14 UTC20m
2026-06-28 N55928 - Jun 28, 19:59 UTCJun 28, 20:14 UTC15m
2026-06-27 N55928 - Jun 27, 23:04 UTCJun 27, 23:25 UTC20m
2026-06-27 N55928 - Jun 27, 21:44 UTCJun 27, 22:20 UTC35m
2026-06-27 N55928 - Jun 27, 20:14 UTCJun 27, 20:55 UTC40m
2026-06-27 N55928 - Jun 27, 00:14 UTCJun 27, 00:39 UTC25m
2026-06-26 N55928 - Jun 26, 23:04 UTCJun 26, 23:25 UTC20m
2026-06-26 N55928 - Jun 26, 16:24 UTCJun 26, 17:40 UTC1h 15m
2026-06-26 N55928 - Jun 26, 03:50 UTCJun 26, 04:04 UTC15m
2026-06-26 N55928 - Jun 26, 01:45 UTCJun 26, 02:05 UTC20m
2026-06-25 N55928 - Jun 25, 21:25 UTCJun 25, 22:10 UTC45m
2026-06-25 N55928 - Jun 25, 18:34 UTCJun 25, 18:55 UTC20m
2026-06-25 N55928 - Jun 25, 14:50 UTCJun 25, 17:49 UTC3h 0m
2026-06-25 N55928 - Jun 25, 02:10 UTCJun 25, 03:15 UTC1h 5m
2026-06-25 N55928 - Jun 25, 00:44 UTCJun 25, 01:14 UTC30m
2026-06-24 N55928 - Jun 24, 23:04 UTCJun 25, 00:05 UTC1h 0m
2026-06-24 N55928 - Jun 24, 20:09 UTCJun 24, 21:04 UTC55m
2026-06-24 N55928 - Jun 24, 15:24 UTCJun 24, 16:24 UTC1h 0m
2026-06-24 N55928 - Jun 24, 02:30 UTCJun 24, 03:04 UTC35m
2026-06-23 N55928 - Jun 23, 23:59 UTCJun 24, 00:34 UTC35m
2026-06-23 N55928 - Jun 23, 04:05 UTCJun 23, 04:19 UTC15m
2026-06-23 N55928 - Jun 23, 01:59 UTCJun 23, 02:24 UTC25m
2026-06-22 N55928 - Jun 22, 21:14 UTCJun 22, 21:30 UTC15m
2026-06-22 N55928 - Jun 22, 19:29 UTCJun 22, 19:54 UTC25m
2026-06-22 N55928 - Jun 22, 16:40 UTCJun 22, 16:54 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 N55928 page for operator, model, and routing details .

Mode-S A72399 frequently asked

What is Mode-S code A72399?
A72399 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N55928.
Where is Mode-S A72399 registered?
Mode-S code A72399 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 A72399 broadcasting right now?
No active broadcast right now. Last signal was Jul 18, 05:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A72399, octal 51621631, decimal 10,953,625.
What flights does A72399 operate?
Mode-S A72399 has broadcast 1 distinct callsign, including N55928.