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 17h ago
Flights observed
248
Distinct callsigns
2
Country
US
Last broadcast
17h 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 - 243 2026-07-13
N419QS - 5 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EJA419 - Jul 13, 20:45 UTCJul 13, 21:35 UTC50m
2026-07-13 EJA419 - Jul 13, 17:35 UTCJul 13, 19:55 UTC2h 20m
2026-07-13 EJA419 - Jul 13, 15:30 UTCJul 13, 16:20 UTC50m
2026-07-13 EJA419 PHL → PVC Jul 13, 13:55 UTCJul 13, 14:40 UTC45m
2026-07-13 EJA419 - Jul 13, 11:15 UTCJul 13, 12:25 UTC1h 10m
2026-07-12 EJA419 - Jul 12, 21:10 UTCJul 12, 21:45 UTC35m
2026-07-12 EJA419 - Jul 12, 18:15 UTCJul 12, 19:40 UTC1h 25m
2026-07-12 EJA419 - Jul 12, 16:15 UTCJul 12, 16:35 UTC20m
2026-07-12 EJA419 - Jul 12, 14:15 UTCJul 12, 15:15 UTC1h 0m
2026-07-12 EJA419 - Jul 12, 12:15 UTCJul 12, 13:05 UTC50m
2026-07-12 EJA419 - Jul 12, 05:10 UTCJul 12, 06:10 UTC1h 0m
2026-07-11 EJA419 BED → FOK Jul 11, 20:05 UTCJul 11, 20:40 UTC35m
2026-07-11 EJA419 - Jul 11, 17:45 UTCJul 11, 18:10 UTC25m
2026-07-10 EJA419 - Jul 10, 23:55 UTCJul 11, 00:15 UTC20m
2026-07-10 EJA419 - Jul 10, 21:20 UTCJul 10, 21:40 UTC20m
2026-07-10 EJA419 - Jul 10, 16:45 UTCJul 10, 18:40 UTC1h 55m
2026-07-10 EJA419 - Jul 10, 14:55 UTCJul 10, 15:35 UTC40m
2026-07-10 EJA419 - Jul 10, 01:15 UTCJul 10, 02:10 UTC55m
2026-07-09 EJA419 - Jul 9, 19:45 UTCJul 9, 20:15 UTC30m
2026-07-09 EJA419 - Jul 9, 18:40 UTCJul 9, 19:10 UTC30m
2026-07-09 EJA419 - Jul 9, 15:15 UTCJul 9, 16:30 UTC1h 15m
2026-07-09 EJA419 - Jul 9, 12:55 UTCJul 9, 14:00 UTC1h 5m
2026-07-08 EJA419 SJC → HDN Jul 8, 20:40 UTCJul 8, 21:45 UTC1h 5m
2026-07-08 EJA419 SJC → HDN Jul 8, 16:05 UTCJul 8, 18:15 UTC2h 10m
2026-07-06 EJA419 SJC → HDN Jul 6, 15:10 UTCJul 6, 16:10 UTC1h 0m
2026-07-06 EJA419 SJC → HDN Jul 6, 13:20 UTCJul 6, 14:15 UTC55m
2026-07-06 EJA419 SJC → HDN Jul 6, 11:15 UTCJul 6, 12:05 UTC50m
2026-07-06 EJA419 SJC → HDN Jul 6, 10:10 UTCJul 6, 10:35 UTC25m
2026-07-05 EJA419 SJC → HDN Jul 5, 17:50 UTCJul 5, 19:20 UTC1h 30m
2026-07-05 EJA419 SJC → HDN Jul 5, 16:10 UTCJul 5, 16:25 UTC15m
2026-07-04 EJA419 SJC → HDN Jul 4, 19:45 UTCJul 4, 22:20 UTC2h 35m
2026-07-04 EJA419 SJC → HDN Jul 4, 16:10 UTCJul 4, 16:55 UTC45m
2026-07-02 EJA419 SJC → HDN Jul 2, 18:25 UTCJul 2, 20:35 UTC2h 10m
2026-07-02 EJA419 SJC → HDN Jul 2, 14:25 UTCJul 2, 15:35 UTC1h 10m
2026-06-30 EJA419 SJC → HDN Jun 30, 20:50 UTCJun 30, 21:25 UTC35m
2026-06-30 EJA419 SJC → HDN Jun 30, 17:15 UTCJun 30, 19:50 UTC2h 35m
2026-06-30 EJA419 SJC → HDN Jun 30, 15:35 UTCJun 30, 16:10 UTC35m
2026-06-30 EJA419 SJC → HDN Jun 30, 13:05 UTCJun 30, 14:20 UTC1h 15m
2026-06-29 EJA419 SJC → HDN Jun 29, 23:19 UTCJun 30, 00:09 UTC50m
2026-06-29 EJA419 SJC → HDN Jun 29, 20:59 UTCJun 29, 22:39 UTC1h 40m
2026-06-29 EJA419 SJC → HDN Jun 29, 17:19 UTCJun 29, 18:30 UTC1h 10m
2026-06-29 EJA419 SJC → HDN Jun 29, 14:25 UTCJun 29, 15:04 UTC40m
2026-06-28 EJA419 SJC → HDN Jun 28, 19:49 UTCJun 28, 22:34 UTC2h 45m
2026-06-28 EJA419 SJC → HDN Jun 28, 18:10 UTCJun 28, 18:55 UTC45m
2026-06-28 N419QS - Jun 28, 15:55 UTCJun 28, 16:39 UTC45m
2026-06-27 N419QS - Jun 27, 19:15 UTCJun 27, 19:55 UTC40m
2026-06-27 EJA419 SJC → HDN Jun 27, 16:00 UTCJun 27, 17:55 UTC1h 55m
2026-06-27 EJA419 SJC → HDN Jun 27, 00:05 UTCJun 27, 02:20 UTC2h 15m
2026-06-24 EJA419 SJC → HDN Jun 24, 20:24 UTCJun 24, 21:34 UTC1h 10m
2026-06-24 EJA419 SJC → HDN Jun 24, 18:25 UTCJun 24, 18:55 UTC30m

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 17h 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.