Apparatus

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sensors Mode-S transponder

A63F16

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N501QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, AIR GORTER LLC, BAHNA DOROTHY J TRUSTEE, JOHNS JOHN, K & S ENDEAVORS LLC, LOUISVILLE PUBLIC WAREHOUSE CO

Hex
A63F16
Octal
51437426
Decimal
10,895,126
Country
US
Tail
N501QS
Type
C68A
No current signal · last broadcast 12h ago
Flights observed
51
Distinct callsigns
2
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A63F16.

Country allocation

The ICAO 24-bit address A63F16 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
EJA501 NetJets 50 2026-05-29
N501QS - 1 2026-04-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA501 IAD → SRQ May 29, 17:35 UTCMay 29, 22:25 UTC4h 50m
2026-05-29 EJA501 IAD → SRQ May 29, 15:00 UTCMay 29, 16:00 UTC1h 0m
2026-05-29 EJA501 IAD → SRQ May 29, 00:05 UTCMay 29, 01:00 UTC55m
2026-05-28 EJA501 IAD → SRQ May 28, 17:30 UTCMay 28, 19:05 UTC1h 35m
2026-05-28 EJA501 IAD → SRQ May 28, 13:50 UTCMay 28, 15:30 UTC1h 40m
2026-05-27 EJA501 IAD → SRQ May 27, 21:00 UTCMay 27, 22:50 UTC1h 50m
2026-05-27 EJA501 IAD → SRQ May 27, 16:25 UTCMay 27, 18:40 UTC2h 15m
2026-05-27 EJA501 IAD → SRQ May 27, 04:24 UTCMay 27, 05:14 UTC50m
2026-05-26 EJA501 IAD → SRQ May 26, 23:14 UTCMay 27, 00:10 UTC55m
2026-05-26 EJA501 IAD → SRQ May 26, 19:10 UTCMay 26, 20:05 UTC55m
2026-05-26 EJA501 IAD → SRQ May 26, 17:04 UTCMay 26, 17:25 UTC20m
2026-05-26 EJA501 IAD → SRQ May 26, 14:50 UTCMay 26, 16:00 UTC1h 10m
2026-05-26 EJA501 IAD → SRQ May 26, 12:14 UTCMay 26, 13:15 UTC1h 0m
2026-05-25 EJA501 IAD → SRQ May 25, 23:45 UTCMay 26, 00:29 UTC45m
2026-05-25 EJA501 IAD → SRQ May 25, 22:10 UTCMay 25, 22:49 UTC40m
2026-05-25 EJA501 IAD → SRQ May 25, 19:25 UTCMay 25, 20:45 UTC1h 20m
2026-05-25 EJA501 IAD → SRQ May 25, 17:00 UTCMay 25, 18:10 UTC1h 10m
2026-05-24 EJA501 IAD → SRQ May 24, 21:40 UTCMay 24, 21:50 UTC10m
2026-05-24 EJA501 IAD → SRQ May 24, 19:45 UTCMay 24, 20:25 UTC40m
2026-05-24 EJA501 IAD → SRQ May 24, 18:00 UTCMay 24, 18:45 UTC45m
2026-05-23 EJA501 IAD → SRQ May 23, 17:40 UTCMay 23, 21:00 UTC3h 21m
2026-05-23 EJA501 IAD → SRQ May 23, 14:35 UTCMay 23, 16:35 UTC2h 0m
2026-05-23 EJA501 IAD → SRQ May 23, 12:40 UTCMay 23, 13:00 UTC20m
2026-05-22 EJA501 IAD → SRQ May 22, 22:35 UTCMay 23, 00:25 UTC1h 50m
2026-05-22 EJA501 IAD → SRQ May 22, 19:30 UTCMay 22, 20:25 UTC55m
2026-05-22 EJA501 IAD → SRQ May 22, 15:30 UTCMay 22, 18:25 UTC2h 55m
2026-05-22 EJA501 IAD → SRQ May 22, 13:55 UTCMay 22, 14:25 UTC30m
2026-05-20 EJA501 IAD → SRQ May 20, 16:50 UTCMay 20, 18:55 UTC2h 5m
2026-05-20 EJA501 IAD → SRQ May 20, 12:10 UTCMay 20, 13:20 UTC1h 10m
2026-05-19 EJA501 IAD → SRQ May 19, 21:05 UTCMay 19, 23:50 UTC2h 45m
2026-05-19 EJA501 IAD → SRQ May 19, 17:15 UTCMay 19, 17:30 UTC15m
2026-05-19 EJA501 IAD → SRQ May 19, 13:10 UTCMay 19, 16:00 UTC2h 50m
2026-05-18 EJA501 IAD → SRQ May 18, 21:35 UTCMay 18, 22:10 UTC35m
2026-05-18 EJA501 IAD → SRQ May 18, 19:05 UTCMay 18, 20:10 UTC1h 5m
2026-05-16 EJA501 IAD → SRQ May 16, 15:01 UTCMay 16, 16:50 UTC1h 50m
2026-05-15 EJA501 IAD → SRQ May 15, 19:25 UTCMay 15, 20:15 UTC50m
2026-05-15 EJA501 IAD → SRQ May 15, 14:00 UTCMay 15, 18:00 UTC3h 59m
2026-05-15 EJA501 IAD → SRQ May 15, 12:40 UTCMay 15, 13:10 UTC30m
2026-05-14 EJA501 IAD → SRQ May 14, 18:55 UTCMay 14, 20:15 UTC1h 20m
2026-05-14 EJA501 IAD → SRQ May 14, 17:30 UTCMay 14, 17:40 UTC10m
2026-05-14 EJA501 IAD → SRQ May 14, 15:25 UTCMay 14, 16:10 UTC45m
2026-05-14 EJA501 IAD → SRQ May 14, 11:25 UTCMay 14, 13:05 UTC1h 40m
2026-05-13 EJA501 IAD → SRQ May 13, 19:20 UTCMay 13, 20:30 UTC1h 10m
2026-05-13 EJA501 IAD → SRQ May 13, 16:40 UTCMay 13, 17:55 UTC1h 15m
2026-04-13 EJA501 IAD → SRQ Apr 13, 20:25 UTCApr 13, 20:55 UTC30m
2026-04-13 EJA501 IAD → SRQ Apr 13, 18:30 UTCApr 13, 19:40 UTC1h 10m
2026-04-13 EJA501 IAD → SRQ Apr 13, 13:55 UTCApr 13, 15:40 UTC1h 45m
2026-04-13 EJA501 IAD → SRQ Apr 13, 00:20 UTCApr 13, 00:35 UTC15m
2026-04-13 EJA501 IAD → SRQ Apr 13, 00:06 UTCApr 13, 01:24 UTC1h 18m
2026-04-12 EJA501 IAD → SRQ Apr 12, 19:35 UTCApr 12, 20:15 UTC40m

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 N501QS page for operator, model, and routing details .

Mode-S A63F16 frequently asked

What is Mode-S code A63F16?
A63F16 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N501QS.
Where is Mode-S A63F16 registered?
Mode-S code A63F16 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 A63F16 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A63F16, octal 51437426, decimal 10,895,126.
What flights does A63F16 operate?
Mode-S A63F16 has broadcast 2 distinct callsigns, including EJA501, N501QS.