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sensors Mode-S transponder

AA742D

ICAO 24-bit transponder address · allocated to United States

Hex
AA742D
Octal
52472055
Decimal
11,170,861
Country
US
No current signal · last broadcast 5h ago
Flights observed
241
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AA742D.

Country allocation

The ICAO 24-bit address AA742D 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
N773AA - 241 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N773AA - Jul 14, 16:00 UTCJul 14, 16:20 UTC20m
2026-07-14 N773AA - Jul 14, 15:05 UTCJul 14, 15:15 UTC10m
2026-07-13 N773AA AUO → AUO Jul 13, 23:25 UTCJul 14, 00:15 UTC50m
2026-07-13 N773AA - Jul 13, 21:20 UTCJul 13, 22:30 UTC1h 10m
2026-07-10 N773AA - Jul 10, 22:25 UTCJul 10, 22:50 UTC25m
2026-07-10 N773AA - Jul 10, 21:10 UTCJul 10, 21:20 UTC10m
2026-07-10 N773AA - Jul 10, 15:20 UTCJul 10, 15:40 UTC20m
2026-07-10 N773AA - Jul 10, 11:30 UTCJul 10, 12:50 UTC1h 20m
2026-07-09 N773AA - Jul 9, 22:00 UTCJul 9, 22:30 UTC30m
2026-07-09 N773AA - Jul 9, 17:55 UTCJul 9, 18:20 UTC25m
2026-07-09 N773AA - Jul 9, 16:45 UTCJul 9, 17:15 UTC30m
2026-07-09 N773AA - Jul 9, 14:30 UTCJul 9, 15:30 UTC1h 0m
2026-07-09 N773AA - Jul 9, 12:30 UTCJul 9, 13:50 UTC1h 20m
2026-07-08 N773AA AUO → AUO Jul 8, 22:50 UTCJul 8, 23:35 UTC45m
2026-07-08 N773AA - Jul 8, 19:05 UTCJul 8, 19:25 UTC20m
2026-07-08 N773AA - Jul 8, 17:40 UTCJul 8, 18:05 UTC25m
2026-07-08 N773AA - Jul 8, 15:30 UTCJul 8, 15:35 UTC5m
2026-07-08 N773AA - Jul 8, 14:20 UTCJul 8, 14:35 UTC15m
2026-07-07 N773AA AUO → AUO Jul 7, 19:10 UTCJul 7, 21:00 UTC1h 50m
2026-07-07 N773AA AUO → AUO Jul 7, 18:20 UTCJul 7, 18:25 UTC5m
2026-07-07 N773AA - Jul 7, 16:55 UTCJul 7, 17:35 UTC40m
2026-07-07 N773AA AUO → AUO Jul 7, 11:50 UTCJul 7, 12:00 UTC10m
2026-07-07 N773AA - Jul 7, 02:20 UTCJul 7, 02:50 UTC30m
2026-07-07 N773AA AUO → AUO Jul 7, 01:50 UTCJul 7, 02:05 UTC15m
2026-07-06 N773AA - Jul 6, 22:55 UTCJul 7, 00:20 UTC1h 25m
2026-07-06 N773AA - Jul 6, 19:20 UTCJul 6, 19:30 UTC10m
2026-07-02 N773AA - Jul 2, 20:35 UTCJul 2, 21:40 UTC1h 5m
2026-07-02 N773AA - Jul 2, 15:45 UTCJul 2, 16:55 UTC1h 10m
2026-07-02 N773AA AUO → AUO Jul 2, 11:35 UTCJul 2, 12:00 UTC25m
2026-07-02 N773AA - Jul 2, 01:40 UTCJul 2, 01:50 UTC10m
2026-07-01 N773AA - Jul 1, 20:20 UTCJul 1, 20:35 UTC15m
2026-07-01 N773AA - Jul 1, 01:15 UTCJul 1, 02:25 UTC1h 10m
2026-06-30 N773AA - Jun 30, 23:40 UTCJul 1, 00:40 UTC1h 0m
2026-06-30 N773AA - Jun 30, 19:50 UTCJun 30, 20:15 UTC25m
2026-06-30 N773AA - Jun 30, 18:40 UTCJun 30, 18:55 UTC15m
2026-06-30 N773AA - Jun 30, 15:35 UTCJun 30, 16:05 UTC30m
2026-06-30 N773AA - Jun 30, 14:45 UTCJun 30, 15:05 UTC20m
2026-06-30 N773AA - Jun 30, 03:00 UTCJun 30, 03:15 UTC15m
2026-06-28 N773AA - Jun 28, 20:34 UTCJun 28, 20:45 UTC10m
2026-06-28 N773AA AUO → AUO Jun 28, 16:39 UTCJun 28, 19:44 UTC3h 5m
2026-06-26 N773AA AUO → AUO Jun 26, 19:45 UTCJun 26, 21:10 UTC1h 25m
2026-06-25 N773AA AUO → AUO Jun 25, 22:54 UTCJun 26, 00:30 UTC1h 35m
2026-06-25 N773AA - Jun 25, 15:34 UTCJun 25, 16:05 UTC30m
2026-06-25 N773AA - Jun 25, 14:09 UTCJun 25, 14:24 UTC15m
2026-06-25 N773AA AUO → AUO Jun 25, 10:55 UTCJun 25, 11:30 UTC35m
2026-06-25 N773AA - Jun 25, 00:44 UTCJun 25, 00:55 UTC10m
2026-06-24 N773AA - Jun 24, 23:20 UTCJun 24, 23:34 UTC15m
2026-06-24 N773AA AUO → AUO Jun 24, 21:34 UTCJun 24, 22:45 UTC1h 10m
2026-06-24 N773AA - Jun 24, 18:15 UTCJun 24, 18:25 UTC10m
2026-06-24 N773AA - Jun 24, 17:05 UTCJun 24, 17:29 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.

Mode-S AA742D frequently asked

What is Mode-S code AA742D?
AA742D is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S AA742D registered?
Mode-S code AA742D 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 AA742D broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA742D, octal 52472055, decimal 11,170,861.
What flights does AA742D operate?
Mode-S AA742D has broadcast 1 distinct callsign, including N773AA.