Apparatus

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sensors Mode-S transponder

A4405F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N373QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, BANK OF UTAH TRUSTEE, BIM AIRCRAFT LLC, DAVITA INC

Hex
A4405F
Octal
51040137
Decimal
10,764,383
Country
US
Tail
N373QS
Type
E55P
No current signal · last broadcast 4d ago
Flights observed
118
Distinct callsigns
2
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A4405F.

Country allocation

The ICAO 24-bit address A4405F 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 2 distinct

Callsign Airline Flights Last seen
EJA373 NetJets 113 2026-05-25
N373QS - 5 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-25 EJA373 MPV → TEB May 25, 22:49 UTCMay 25, 23:00 UTC10m
2026-05-25 EJA373 MPV → TEB May 25, 21:09 UTCMay 25, 22:10 UTC1h 0m
2026-05-25 N373QS - May 25, 18:25 UTCMay 25, 20:24 UTC2h 0m
2026-05-25 N373QS - May 25, 13:35 UTCMay 25, 15:30 UTC1h 55m
2026-05-24 EJA373 MPV → TEB May 24, 15:20 UTCMay 24, 16:30 UTC1h 10m
2026-05-24 EJA373 MPV → TEB May 24, 13:55 UTCMay 24, 14:30 UTC35m
2026-05-24 EJA373 MPV → TEB May 24, 11:25 UTCMay 24, 12:05 UTC40m
2026-05-23 EJA373 MPV → TEB May 23, 20:20 UTCMay 23, 21:20 UTC1h 0m
2026-05-23 EJA373 MPV → TEB May 23, 18:20 UTCMay 23, 18:45 UTC25m
2026-05-23 EJA373 MPV → TEB May 23, 04:05 UTCMay 23, 04:30 UTC25m
2026-05-22 EJA373 MPV → TEB May 22, 23:20 UTCMay 22, 23:50 UTC30m
2026-05-22 EJA373 MPV → TEB May 22, 21:25 UTCMay 22, 22:05 UTC40m
2026-05-22 EJA373 MPV → TEB May 22, 20:10 UTCMay 22, 20:45 UTC35m
2026-05-22 EJA373 MPV → TEB May 22, 18:20 UTCMay 22, 19:05 UTC45m
2026-05-22 EJA373 MPV → TEB May 22, 16:50 UTCMay 22, 17:35 UTC45m
2026-05-22 EJA373 MPV → TEB May 22, 03:00 UTCMay 22, 03:55 UTC55m
2026-05-22 EJA373 MPV → TEB May 22, 01:05 UTCMay 22, 01:40 UTC35m
2026-05-21 EJA373 MPV → TEB May 21, 22:35 UTCMay 22, 00:25 UTC1h 50m
2026-05-21 EJA373 MPV → TEB May 21, 20:10 UTCMay 21, 20:45 UTC35m
2026-05-21 EJA373 MPV → TEB May 21, 16:50 UTCMay 21, 19:05 UTC2h 15m
2026-05-20 EJA373 MPV → TEB May 20, 23:35 UTCMay 21, 01:55 UTC2h 20m
2026-05-20 EJA373 MPV → TEB May 20, 21:20 UTCMay 20, 21:30 UTC10m
2026-05-20 EJA373 MPV → TEB May 20, 17:15 UTCMay 20, 19:35 UTC2h 20m
2026-05-20 EJA373 MPV → TEB May 20, 14:55 UTCMay 20, 16:25 UTC1h 30m
2026-05-20 EJA373 MPV → TEB May 20, 13:45 UTCMay 20, 14:00 UTC15m
2026-05-20 EJA373 MPV → TEB May 20, 01:20 UTCMay 20, 02:20 UTC1h 0m
2026-05-19 EJA373 MPV → TEB May 19, 21:30 UTCMay 20, 00:05 UTC2h 35m
2026-05-19 EJA373 MPV → TEB May 19, 14:30 UTCMay 19, 15:05 UTC35m
2026-05-19 EJA373 MPV → TEB May 19, 12:25 UTCMay 19, 13:55 UTC1h 30m
2026-05-18 EJA373 MPV → TEB May 18, 19:35 UTCMay 18, 19:55 UTC20m
2026-05-18 EJA373 MPV → TEB May 18, 17:25 UTCMay 18, 19:00 UTC1h 34m
2026-05-18 EJA373 MPV → TEB May 18, 15:00 UTCMay 18, 16:40 UTC1h 40m
2026-05-17 EJA373 MPV → TEB May 17, 21:40 UTCMay 17, 23:05 UTC1h 25m
2026-05-17 EJA373 MPV → TEB May 17, 19:40 UTCMay 17, 20:20 UTC40m
2026-05-17 EJA373 MPV → TEB May 17, 16:20 UTCMay 17, 18:35 UTC2h 15m
2026-05-17 EJA373 MPV → TEB May 17, 13:20 UTCMay 17, 15:31 UTC2h 10m
2026-05-15 EJA373 MPV → TEB May 15, 19:35 UTCMay 15, 20:35 UTC1h 0m
2026-05-15 EJA373 MPV → TEB May 15, 15:35 UTCMay 15, 17:20 UTC1h 45m
2026-05-14 N373QS - May 14, 21:15 UTCMay 14, 21:35 UTC20m
2026-05-14 N373QS - May 14, 19:20 UTCMay 14, 19:45 UTC25m
2026-05-14 EJA373 MPV → TEB May 14, 15:01 UTCMay 14, 16:45 UTC1h 45m
2026-05-14 EJA373 MPV → TEB May 14, 11:55 UTCMay 14, 13:40 UTC1h 45m
2026-05-14 EJA373 MPV → TEB May 14, 00:30 UTCMay 14, 00:40 UTC10m
2026-05-13 EJA373 MPV → TEB May 13, 21:15 UTCMay 13, 23:35 UTC2h 20m
2026-05-13 EJA373 MPV → TEB May 13, 19:20 UTCMay 13, 19:50 UTC30m
2026-05-13 EJA373 MPV → TEB May 13, 16:35 UTCMay 13, 17:45 UTC1h 10m
2026-05-13 EJA373 MPV → TEB May 13, 14:55 UTCMay 13, 15:40 UTC45m
2026-05-13 EJA373 MPV → TEB May 13, 13:15 UTCMay 13, 13:55 UTC40m
2026-05-12 EJA373 MPV → TEB May 12, 19:15 UTCMay 12, 20:25 UTC1h 10m
2026-05-12 EJA373 MPV → TEB May 12, 14:50 UTCMay 12, 15:50 UTC1h 0m

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 N373QS page for operator, model, and routing details .

Mode-S A4405F frequently asked

What is Mode-S code A4405F?
A4405F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N373QS.
Where is Mode-S A4405F registered?
Mode-S code A4405F 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 A4405F broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4405F, octal 51040137, decimal 10,764,383.
What flights does A4405F operate?
Mode-S A4405F has broadcast 2 distinct callsigns, including EJA373, N373QS.