Apparatus

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sensors Mode-S transponder

A57742

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N451QS · EMBRAER EMB-505 Phenom 300 · operated by BRENNAN FLORIDA HOLDING CO LLC, MUELLER DAVID R, DDK 806 LLC, BUCHTA ELMER WALTER JR, RYAN FRANCIS, MICHAEL KRISTOPHER

Hex
A57742
Octal
51273502
Decimal
10,843,970
Country
US
Tail
N451QS
Type
E55P
No current signal · last broadcast 2h ago
Flights observed
135
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A57742.

Country allocation

The ICAO 24-bit address A57742 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
EJA451 NetJets 135 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EJA451 SUN → SFO May 30, 01:50 UTCMay 30, 03:00 UTC1h 10m
2026-05-29 EJA451 SUN → SFO May 29, 20:20 UTCMay 29, 22:50 UTC2h 30m
2026-05-29 EJA451 SUN → SFO May 29, 18:55 UTCMay 29, 19:15 UTC20m
2026-05-29 EJA451 SUN → SFO May 29, 16:15 UTCMay 29, 17:55 UTC1h 40m
2026-05-29 EJA451 SUN → SFO May 29, 14:10 UTCMay 29, 14:55 UTC45m
2026-05-28 EJA451 SUN → SFO May 28, 21:40 UTCMay 28, 23:25 UTC1h 45m
2026-05-28 EJA451 SUN → SFO May 28, 19:30 UTCMay 28, 20:30 UTC1h 0m
2026-05-28 EJA451 SUN → SFO May 28, 17:35 UTCMay 28, 18:15 UTC40m
2026-05-28 EJA451 SUN → SFO May 28, 14:35 UTCMay 28, 16:35 UTC2h 0m
2026-05-28 EJA451 SUN → SFO May 28, 13:15 UTCMay 28, 13:35 UTC20m
2026-05-27 EJA451 SUN → SFO May 27, 21:05 UTCMay 27, 22:35 UTC1h 30m
2026-05-27 EJA451 SUN → SFO May 27, 18:00 UTCMay 27, 20:00 UTC2h 0m
2026-05-27 EJA451 SUN → SFO May 27, 16:10 UTCMay 27, 17:10 UTC1h 0m
2026-05-27 EJA451 SUN → SFO May 27, 13:30 UTCMay 27, 15:20 UTC1h 50m
2026-05-26 EJA451 SUN → SFO May 26, 21:34 UTCMay 26, 23:54 UTC2h 20m
2026-05-26 EJA451 SUN → SFO May 26, 17:04 UTCMay 26, 20:00 UTC2h 55m
2026-05-26 EJA451 SUN → SFO May 26, 15:29 UTCMay 26, 16:00 UTC30m
2026-05-26 EJA451 SUN → SFO May 26, 13:45 UTCMay 26, 14:05 UTC20m
2026-05-25 EJA451 SUN → SFO May 25, 23:40 UTCMay 26, 00:44 UTC1h 5m
2026-05-25 EJA451 SUN → SFO May 25, 21:24 UTCMay 25, 22:55 UTC1h 30m
2026-05-25 EJA451 SUN → SFO May 25, 16:55 UTCMay 25, 18:00 UTC1h 5m
2026-05-25 EJA451 SUN → SFO May 25, 14:30 UTCMay 25, 16:00 UTC1h 30m
2026-05-25 EJA451 SUN → SFO May 25, 13:05 UTCMay 25, 13:40 UTC35m
2026-05-24 EJA451 SUN → SFO May 24, 16:35 UTCMay 24, 19:00 UTC2h 25m
2026-05-24 EJA451 SUN → SFO May 24, 14:20 UTCMay 24, 15:10 UTC50m
2026-05-23 EJA451 SUN → SFO May 23, 14:20 UTCMay 23, 17:05 UTC2h 45m
2026-05-22 EJA451 SUN → SFO May 22, 23:15 UTCMay 22, 23:40 UTC25m
2026-05-22 EJA451 SUN → SFO May 22, 20:00 UTCMay 22, 22:15 UTC2h 15m
2026-05-22 EJA451 SUN → SFO May 22, 16:55 UTCMay 22, 18:00 UTC1h 5m
2026-05-22 EJA451 SUN → SFO May 22, 13:55 UTCMay 22, 15:25 UTC1h 30m
2026-05-21 EJA451 SUN → SFO May 21, 23:50 UTCMay 22, 00:40 UTC50m
2026-05-21 EJA451 SUN → SFO May 21, 18:35 UTCMay 21, 23:05 UTC4h 30m
2026-05-21 EJA451 SUN → SFO May 21, 15:25 UTCMay 21, 17:30 UTC2h 5m
2026-05-20 EJA451 SUN → SFO May 20, 16:15 UTCMay 20, 17:40 UTC1h 25m
2026-05-20 EJA451 SUN → SFO May 20, 11:55 UTCMay 20, 14:40 UTC2h 45m
2026-05-19 EJA451 SUN → SFO May 19, 21:40 UTCMay 19, 23:00 UTC1h 20m
2026-05-19 EJA451 SUN → SFO May 19, 18:40 UTCMay 19, 19:55 UTC1h 15m
2026-05-18 EJA451 SUN → SFO May 18, 17:30 UTCMay 18, 19:30 UTC1h 59m
2026-05-18 EJA451 SUN → SFO May 18, 14:30 UTCMay 18, 15:10 UTC40m
2026-05-18 EJA451 SUN → SFO May 18, 00:05 UTCMay 18, 00:35 UTC30m
2026-05-17 EJA451 SUN → SFO May 17, 21:05 UTCMay 17, 23:10 UTC2h 5m
2026-05-17 EJA451 SUN → SFO May 17, 19:10 UTCMay 17, 19:55 UTC45m
2026-05-17 EJA451 SUN → SFO May 17, 16:20 UTCMay 17, 18:05 UTC1h 45m
2026-05-17 EJA451 SUN → SFO May 17, 14:10 UTCMay 17, 14:25 UTC15m
2026-05-16 EJA451 SUN → SFO May 16, 23:10 UTCMay 17, 00:45 UTC1h 35m
2026-05-14 EJA451 SUN → SFO May 14, 21:50 UTCMay 15, 01:20 UTC3h 30m
2026-05-14 EJA451 SUN → SFO May 14, 18:50 UTCMay 14, 20:30 UTC1h 40m
2026-05-14 EJA451 SUN → SFO May 14, 17:00 UTCMay 14, 17:15 UTC15m
2026-05-14 EJA451 SUN → SFO May 14, 15:05 UTCMay 14, 15:45 UTC40m
2026-05-13 EJA451 SUN → SFO May 13, 23:05 UTCMay 14, 00:10 UTC1h 5m

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 N451QS page for operator, model, and routing details .

Mode-S A57742 frequently asked

What is Mode-S code A57742?
A57742 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N451QS.
Where is Mode-S A57742 registered?
Mode-S code A57742 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 A57742 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57742, octal 51273502, decimal 10,843,970.
What flights does A57742 operate?
Mode-S A57742 has broadcast 1 distinct callsign, including EJA451.