Apparatus

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sensors Mode-S transponder

A81F1A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N622QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, HUMPHREY ALAN E, AMB MEDIA LLC, D & D JET LLC, DCAJ LLC, EJT AIR LLC

Hex
A81F1A
Octal
52017432
Decimal
11,018,010
Country
US
Tail
N622QS
Type
C68A
No current signal · last broadcast 1d ago
Flights observed
117
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A81F1A.

Country allocation

The ICAO 24-bit address A81F1A 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
EJA622 NetJets 111 2026-05-29
N622QS - 6 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA622 BZN → HPN May 29, 01:05 UTCMay 29, 01:55 UTC50m
2026-05-28 EJA622 BZN → HPN May 28, 22:40 UTCMay 29, 00:00 UTC1h 20m
2026-05-28 EJA622 BZN → HPN May 28, 14:20 UTCMay 28, 18:00 UTC3h 40m
2026-05-27 EJA622 BZN → HPN May 27, 23:00 UTCMay 28, 01:15 UTC2h 15m
2026-05-27 EJA622 BZN → HPN May 27, 16:15 UTCMay 27, 21:10 UTC4h 55m
2026-05-26 EJA622 BZN → HPN May 26, 23:35 UTCMay 27, 00:49 UTC1h 15m
2026-05-26 EJA622 BZN → HPN May 26, 22:15 UTCMay 26, 22:54 UTC40m
2026-05-26 EJA622 BZN → HPN May 26, 18:50 UTCMay 26, 20:34 UTC1h 45m
2026-05-26 EJA622 BZN → HPN May 26, 15:09 UTCMay 26, 17:39 UTC2h 30m
2026-05-26 EJA622 BZN → HPN May 26, 13:50 UTCMay 26, 14:30 UTC40m
2026-05-25 EJA622 BZN → HPN May 25, 20:34 UTCMay 25, 22:10 UTC1h 35m
2026-05-25 EJA622 BZN → HPN May 25, 18:05 UTCMay 25, 18:55 UTC50m
2026-05-25 EJA622 BZN → HPN May 25, 16:40 UTCMay 25, 17:20 UTC40m
2026-05-25 EJA622 BZN → HPN May 25, 14:15 UTCMay 25, 15:25 UTC1h 10m
2026-05-24 EJA622 BZN → HPN May 24, 21:25 UTCMay 24, 21:45 UTC20m
2026-05-24 EJA622 BZN → HPN May 24, 19:20 UTCMay 24, 20:10 UTC50m
2026-05-24 EJA622 BZN → HPN May 24, 15:10 UTCMay 24, 17:30 UTC2h 20m
2026-05-24 EJA622 BZN → HPN May 24, 13:45 UTCMay 24, 14:00 UTC15m
2026-05-23 EJA622 BZN → HPN May 23, 17:00 UTCMay 23, 20:05 UTC3h 5m
2026-05-23 EJA622 BZN → HPN May 23, 14:05 UTCMay 23, 15:15 UTC1h 10m
2026-05-20 EJA622 BZN → HPN May 20, 20:45 UTCMay 21, 01:00 UTC4h 15m
2026-05-20 EJA622 BZN → HPN May 20, 01:20 UTCMay 20, 03:00 UTC1h 40m
2026-05-19 EJA622 BZN → HPN May 19, 20:00 UTCMay 19, 21:50 UTC1h 50m
2026-05-19 EJA622 BZN → HPN May 19, 15:30 UTCMay 19, 18:50 UTC3h 20m
2026-05-18 EJA622 BZN → HPN May 18, 22:05 UTCMay 18, 23:00 UTC55m
2026-05-18 EJA622 BZN → HPN May 18, 19:25 UTCMay 18, 19:35 UTC10m
2026-05-18 EJA622 BZN → HPN May 18, 15:20 UTCMay 18, 18:15 UTC2h 55m
2026-05-18 EJA622 BZN → HPN May 18, 13:30 UTCMay 18, 13:55 UTC25m
2026-05-17 EJA622 BZN → HPN May 17, 21:40 UTCMay 17, 23:45 UTC2h 5m
2026-05-17 EJA622 BZN → HPN May 17, 19:30 UTCMay 17, 20:25 UTC55m
2026-05-17 EJA622 BZN → HPN May 17, 15:10 UTCMay 17, 18:05 UTC2h 55m
2026-05-16 EJA622 BZN → HPN May 16, 21:05 UTCMay 16, 21:50 UTC45m
2026-05-16 EJA622 BZN → HPN May 16, 19:10 UTCMay 16, 20:00 UTC50m
2026-05-16 EJA622 BZN → HPN May 16, 16:20 UTCMay 16, 17:15 UTC55m
2026-05-15 EJA622 BZN → HPN May 15, 21:05 UTCMay 15, 22:50 UTC1h 45m
2026-05-15 EJA622 BZN → HPN May 15, 17:10 UTCMay 15, 18:20 UTC1h 10m
2026-05-15 N622QS - May 15, 14:25 UTCMay 15, 15:30 UTC1h 4m
2026-05-15 N622QS - May 15, 11:55 UTCMay 15, 12:30 UTC35m
2026-05-15 EJA622 BZN → HPN May 15, 02:05 UTCMay 15, 04:30 UTC2h 25m
2026-05-14 EJA622 BZN → HPN May 14, 22:10 UTCMay 14, 23:50 UTC1h 40m
2026-05-13 EJA622 BZN → HPN May 13, 17:05 UTCMay 13, 17:40 UTC35m
2026-05-13 EJA622 BZN → HPN May 13, 15:45 UTCMay 13, 16:15 UTC30m
2026-05-13 EJA622 BZN → HPN May 13, 12:30 UTCMay 13, 14:05 UTC1h 35m
2026-05-12 EJA622 BZN → HPN May 12, 20:40 UTCMay 12, 21:30 UTC50m
2026-05-12 EJA622 BZN → HPN May 12, 19:10 UTCMay 12, 20:01 UTC50m
2026-05-12 EJA622 BZN → HPN May 12, 17:15 UTCMay 12, 18:30 UTC1h 15m
2026-05-12 EJA622 BZN → HPN May 12, 13:40 UTCMay 12, 16:00 UTC2h 20m
2026-05-12 EJA622 BZN → HPN May 12, 12:10 UTCMay 12, 12:45 UTC35m
2026-05-11 N622QS - May 11, 14:05 UTCMay 11, 17:50 UTC3h 46m
2026-05-10 N622QS - May 10, 16:04 UTCMay 10, 18:29 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 N622QS page for operator, model, and routing details .

Mode-S A81F1A frequently asked

What is Mode-S code A81F1A?
A81F1A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N622QS.
Where is Mode-S A81F1A registered?
Mode-S code A81F1A 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 A81F1A broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A81F1A, octal 52017432, decimal 11,018,010.
What flights does A81F1A operate?
Mode-S A81F1A has broadcast 2 distinct callsigns, including EJA622, N622QS.