Apparatus

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sensors Mode-S transponder

A4C45A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N406QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, 2JC CORP, NORTH STAR VENTURE MANAGEMENT 2010 LLC, NORTH STAR VENTURE MANAGEMENT AVIATION LLC, WHEN FROGS FLY LLC

Hex
A4C45A
Octal
51142132
Decimal
10,798,170
Country
US
Tail
N406QS
Type
E55P
No current signal · last broadcast 3h ago
Flights observed
109
Distinct callsigns
2
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A4C45A.

Country allocation

The ICAO 24-bit address A4C45A 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
EJA406 NetJets 106 2026-05-30
N406QS - 3 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EJA406 LBE → YQA May 30, 01:20 UTCMay 30, 02:20 UTC1h 0m
2026-05-29 EJA406 LBE → YQA May 29, 22:35 UTCMay 29, 23:05 UTC30m
2026-05-29 EJA406 LBE → YQA May 29, 18:40 UTCMay 29, 21:45 UTC3h 5m
2026-05-29 EJA406 LBE → YQA May 29, 16:50 UTCMay 29, 17:35 UTC45m
2026-05-29 EJA406 LBE → YQA May 29, 15:15 UTCMay 29, 15:50 UTC35m
2026-05-29 EJA406 LBE → YQA May 29, 02:00 UTCMay 29, 03:25 UTC1h 25m
2026-05-24 EJA406 LBE → YQA May 24, 12:00 UTCMay 24, 15:45 UTC3h 45m
2026-05-23 EJA406 LBE → YQA May 23, 18:55 UTCMay 23, 19:05 UTC10m
2026-05-23 EJA406 LBE → YQA May 23, 16:35 UTCMay 23, 18:10 UTC1h 35m
2026-05-23 EJA406 LBE → YQA May 23, 12:45 UTCMay 23, 13:50 UTC1h 5m
2026-05-22 EJA406 LBE → YQA May 22, 18:30 UTCMay 22, 20:40 UTC2h 10m
2026-05-22 EJA406 LBE → YQA May 22, 17:05 UTCMay 22, 17:45 UTC40m
2026-05-22 EJA406 LBE → YQA May 22, 14:10 UTCMay 22, 16:15 UTC2h 5m
2026-05-22 EJA406 LBE → YQA May 22, 12:00 UTCMay 22, 12:15 UTC15m
2026-05-22 EJA406 LBE → YQA May 22, 02:40 UTCMay 22, 03:15 UTC35m
2026-05-21 EJA406 LBE → YQA May 21, 23:15 UTCMay 22, 00:50 UTC1h 35m
2026-05-21 EJA406 LBE → YQA May 21, 20:00 UTCMay 21, 22:30 UTC2h 30m
2026-05-21 EJA406 LBE → YQA May 21, 17:35 UTCMay 21, 18:20 UTC45m
2026-05-21 EJA406 LBE → YQA May 21, 16:10 UTCMay 21, 16:45 UTC35m
2026-05-21 EJA406 LBE → YQA May 21, 02:50 UTCMay 21, 03:55 UTC1h 5m
2026-05-21 EJA406 LBE → YQA May 21, 00:50 UTCMay 21, 02:15 UTC1h 25m
2026-05-20 EJA406 LBE → YQA May 20, 18:55 UTCMay 20, 20:25 UTC1h 30m
2026-05-20 EJA406 LBE → YQA May 20, 16:35 UTCMay 20, 16:50 UTC15m
2026-05-20 EJA406 LBE → YQA May 20, 01:10 UTCMay 20, 01:50 UTC40m
2026-05-19 EJA406 LBE → YQA May 19, 18:05 UTCMay 19, 18:55 UTC50m
2026-05-18 EJA406 LBE → YQA May 18, 19:10 UTCMay 18, 19:40 UTC30m
2026-05-18 EJA406 LBE → YQA May 18, 16:15 UTCMay 18, 18:25 UTC2h 10m
2026-05-17 EJA406 LBE → YQA May 17, 23:55 UTCMay 18, 01:30 UTC1h 35m
2026-05-17 EJA406 LBE → YQA May 17, 22:01 UTCMay 17, 22:25 UTC25m
2026-05-17 EJA406 LBE → YQA May 17, 15:15 UTCMay 17, 21:30 UTC6h 15m
2026-05-16 EJA406 LBE → YQA May 16, 20:45 UTCMay 16, 21:15 UTC30m
2026-05-16 EJA406 LBE → YQA May 16, 00:15 UTCMay 16, 00:25 UTC10m
2026-05-15 EJA406 LBE → YQA May 15, 23:20 UTCMay 15, 23:45 UTC25m
2026-05-15 EJA406 LBE → YQA May 15, 19:45 UTCMay 15, 22:00 UTC2h 15m
2026-05-14 N406QS - May 14, 22:35 UTCMay 15, 18:20 UTC19h 44m
2026-05-14 N406QS - May 14, 22:10 UTCMay 15, 18:20 UTC20h 9m
2026-05-14 N406QS - May 14, 14:10 UTCMay 14, 20:10 UTC6h 0m
2026-05-13 EJA406 LBE → YQA May 13, 22:15 UTCMay 14, 00:00 UTC1h 45m
2026-05-13 EJA406 LBE → YQA May 13, 20:00 UTCMay 13, 20:35 UTC35m
2026-05-13 EJA406 LBE → YQA May 13, 16:15 UTCMay 13, 17:00 UTC45m
2026-05-13 EJA406 LBE → YQA May 13, 14:15 UTCMay 13, 15:10 UTC55m
2026-05-12 EJA406 LBE → YQA May 12, 22:20 UTCMay 12, 23:25 UTC1h 5m
2026-05-12 EJA406 LBE → YQA May 12, 18:45 UTCMay 12, 21:35 UTC2h 50m
2026-05-12 EJA406 LBE → YQA May 12, 15:15 UTCMay 12, 17:55 UTC2h 40m
2026-05-12 EJA406 LBE → YQA May 12, 12:55 UTCMay 12, 13:25 UTC30m
2026-05-11 EJA406 LBE → YQA May 11, 20:20 UTCMay 11, 21:50 UTC1h 30m
2026-05-11 EJA406 LBE → YQA May 11, 19:40 UTCMay 11, 19:50 UTC10m
2026-05-04 EJA406 LBE → YQA May 4, 01:15 UTCMay 4, 02:04 UTC50m
2026-05-03 EJA406 LBE → YQA May 3, 19:55 UTCMay 3, 20:55 UTC1h 0m
2026-05-03 EJA406 LBE → YQA May 3, 03:30 UTCMay 3, 05:55 UTC2h 25m

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 N406QS page for operator, model, and routing details .

Mode-S A4C45A frequently asked

What is Mode-S code A4C45A?
A4C45A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N406QS.
Where is Mode-S A4C45A registered?
Mode-S code A4C45A 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 A4C45A broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C45A, octal 51142132, decimal 10,798,170.
What flights does A4C45A operate?
Mode-S A4C45A has broadcast 2 distinct callsigns, including EJA406, N406QS.