Apparatus

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sensors Mode-S transponder

A4F6FE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N419QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, AIRCRAFT SERVICES LLC, AIRSPACE RESOURCES LLC, CLOUD SERVICES LLC, E2 CONSULTING ENGINEERS INC, INFOR (US) LLC

Hex
A4F6FE
Octal
51173376
Decimal
10,811,134
Country
US
Tail
N419QS
Type
E55P
No current signal · last broadcast 6d ago
Flights observed
108
Distinct callsigns
2
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S A4F6FE.

Country allocation

The ICAO 24-bit address A4F6FE 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
EJA419 NetJets 105 2026-05-23
N419QS - 3 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-23 EJA419 SJC → HDN May 23, 19:45 UTCMay 23, 21:20 UTC1h 35m
2026-05-20 EJA419 SJC → HDN May 20, 00:25 UTCMay 20, 01:15 UTC50m
2026-05-19 EJA419 SJC → HDN May 19, 22:55 UTCMay 19, 23:50 UTC55m
2026-05-19 EJA419 SJC → HDN May 19, 19:05 UTCMay 19, 19:55 UTC50m
2026-05-19 EJA419 SJC → HDN May 19, 16:45 UTCMay 19, 18:20 UTC1h 35m
2026-05-19 EJA419 SJC → HDN May 19, 14:20 UTCMay 19, 14:55 UTC35m
2026-05-18 EJA419 SJC → HDN May 18, 20:50 UTCMay 18, 21:30 UTC40m
2026-05-18 EJA419 SJC → HDN May 18, 18:30 UTCMay 18, 19:55 UTC1h 25m
2026-05-18 EJA419 SJC → HDN May 18, 13:10 UTCMay 18, 14:40 UTC1h 30m
2026-05-17 EJA419 SJC → HDN May 17, 20:30 UTCMay 17, 20:55 UTC25m
2026-05-17 EJA419 SJC → HDN May 17, 15:01 UTCMay 17, 17:45 UTC2h 45m
2026-05-16 EJA419 SJC → HDN May 16, 23:00 UTCMay 17, 00:00 UTC1h 0m
2026-05-15 EJA419 SJC → HDN May 15, 23:00 UTCMay 15, 23:25 UTC25m
2026-05-15 EJA419 SJC → HDN May 15, 20:40 UTCMay 15, 21:55 UTC1h 15m
2026-05-15 EJA419 SJC → HDN May 15, 17:20 UTCMay 15, 18:05 UTC45m
2026-05-15 EJA419 SJC → HDN May 15, 14:15 UTCMay 15, 16:25 UTC2h 9m
2026-05-15 EJA419 SJC → HDN May 15, 01:00 UTCMay 15, 01:10 UTC10m
2026-05-14 EJA419 SJC → HDN May 14, 21:45 UTCMay 15, 00:15 UTC2h 30m
2026-05-14 EJA419 SJC → HDN May 14, 17:50 UTCMay 14, 18:25 UTC35m
2026-05-14 EJA419 SJC → HDN May 14, 14:25 UTCMay 14, 15:05 UTC40m
2026-05-14 EJA419 SJC → HDN May 14, 02:20 UTCMay 14, 05:20 UTC3h 0m
2026-05-13 EJA419 SJC → HDN May 13, 23:05 UTCMay 13, 23:50 UTC45m
2026-05-13 EJA419 SJC → HDN May 13, 21:05 UTCMay 13, 22:20 UTC1h 15m
2026-05-13 EJA419 SJC → HDN May 13, 18:30 UTCMay 13, 19:45 UTC1h 15m
2026-05-12 EJA419 SJC → HDN May 12, 18:25 UTCMay 12, 20:25 UTC2h 0m
2026-05-12 EJA419 SJC → HDN May 12, 12:15 UTCMay 12, 14:00 UTC1h 45m
2026-05-11 EJA419 SJC → HDN May 11, 19:00 UTCMay 11, 20:25 UTC1h 25m
2026-05-11 EJA419 SJC → HDN May 11, 17:05 UTCMay 11, 18:05 UTC1h 0m
2026-05-11 EJA419 SJC → HDN May 11, 15:20 UTCMay 11, 15:40 UTC20m
2026-05-11 EJA419 SJC → HDN May 11, 12:00 UTCMay 11, 13:45 UTC1h 45m
2026-05-10 EJA419 SJC → HDN May 10, 20:14 UTCMay 10, 21:04 UTC50m
2026-05-10 EJA419 SJC → HDN May 10, 14:45 UTCMay 10, 17:40 UTC2h 55m
2026-05-10 EJA419 SJC → HDN May 10, 12:54 UTCMay 10, 13:19 UTC25m
2026-05-09 EJA419 SJC → HDN May 9, 18:00 UTCMay 9, 20:34 UTC2h 35m
2026-05-09 EJA419 SJC → HDN May 9, 16:10 UTCMay 9, 17:00 UTC50m
2026-05-09 EJA419 SJC → HDN May 9, 00:05 UTCMay 9, 02:45 UTC2h 40m
2026-05-08 EJA419 SJC → HDN May 8, 21:05 UTCMay 8, 22:25 UTC1h 20m
2026-05-08 EJA419 SJC → HDN May 8, 19:45 UTCMay 8, 20:10 UTC25m
2026-05-08 EJA419 SJC → HDN May 8, 17:15 UTCMay 8, 18:20 UTC1h 5m
2026-05-08 EJA419 SJC → HDN May 8, 01:35 UTCMay 8, 01:55 UTC20m
2026-05-07 EJA419 SJC → HDN May 7, 23:55 UTCMay 8, 01:00 UTC1h 5m
2026-05-07 EJA419 SJC → HDN May 7, 21:50 UTCMay 7, 22:05 UTC15m
2026-05-07 EJA419 SJC → HDN May 7, 18:10 UTCMay 7, 18:55 UTC45m
2026-05-07 EJA419 SJC → HDN May 7, 15:40 UTCMay 7, 17:00 UTC1h 20m
2026-05-06 EJA419 SJC → HDN May 6, 21:20 UTCMay 6, 23:55 UTC2h 35m
2026-05-06 EJA419 SJC → HDN May 6, 19:30 UTCMay 6, 20:30 UTC1h 0m
2026-05-06 EJA419 SJC → HDN May 6, 16:20 UTCMay 6, 18:35 UTC2h 15m
2026-05-05 EJA419 SJC → HDN May 5, 23:45 UTCMay 6, 00:01 UTC15m
2026-05-05 EJA419 SJC → HDN May 5, 21:35 UTCMay 5, 22:55 UTC1h 20m
2026-05-05 EJA419 SJC → HDN May 5, 18:05 UTCMay 5, 19:10 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 N419QS page for operator, model, and routing details .

Mode-S A4F6FE frequently asked

What is Mode-S code A4F6FE?
A4F6FE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N419QS.
Where is Mode-S A4F6FE registered?
Mode-S code A4F6FE 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 A4F6FE broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4F6FE, octal 51173376, decimal 10,811,134.
What flights does A4F6FE operate?
Mode-S A4F6FE has broadcast 2 distinct callsigns, including EJA419, N419QS.