Apparatus

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sensors Mode-S transponder

AB3601

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821QS · CESSNA 700 Citation Longitude · operated by NETJETS SALES INC, AH CAPITAL MANAGEMENT LLC, BECAUSE OF JAZZY LLC, GROSSMAN BLAKE, CRUVER BRIAN, CRUVER CATHERINE

Hex
AB3601
Octal
52633001
Decimal
11,220,481
Country
US
Tail
N821QS
Type
C700
No current signal · last broadcast 5h ago
Flights observed
103
Distinct callsigns
2
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AB3601.

Country allocation

The ICAO 24-bit address AB3601 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
EJA821 NetJets 87 2026-06-10
N821QS - 16 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-10 EJA821 LAX → ILG Jun 10, 17:05 UTCJun 10, 19:00 UTC1h 55m
2026-06-10 EJA821 LAX → ILG Jun 10, 14:00 UTCJun 10, 15:15 UTC1h 15m
2026-06-10 EJA821 LAX → ILG Jun 10, 12:45 UTCJun 10, 13:05 UTC20m
2026-06-09 EJA821 LAX → ILG Jun 9, 19:50 UTCJun 9, 20:30 UTC40m
2026-06-09 EJA821 LAX → ILG Jun 9, 17:15 UTCJun 9, 18:25 UTC1h 10m
2026-06-09 EJA821 LAX → ILG Jun 9, 13:15 UTCJun 9, 14:45 UTC1h 30m
2026-06-08 EJA821 LAX → ILG Jun 8, 23:30 UTCJun 9, 00:45 UTC1h 15m
2026-06-08 N821QS CUN → PDK Jun 8, 17:30 UTCJun 8, 19:45 UTC2h 15m
2026-06-08 N821QS - Jun 8, 14:40 UTCJun 8, 16:00 UTC1h 20m
2026-06-07 EJA821 LAX → ILG Jun 7, 23:30 UTCJun 8, 01:10 UTC1h 40m
2026-06-07 EJA821 LAX → ILG Jun 7, 18:05 UTCJun 7, 22:40 UTC4h 35m
2026-06-07 EJA821 LAX → ILG Jun 7, 14:45 UTCJun 7, 16:00 UTC1h 15m
2026-06-06 EJA821 LAX → ILG Jun 6, 17:00 UTCJun 6, 22:50 UTC5h 50m
2026-06-06 EJA821 LAX → ILG Jun 6, 14:34 UTCJun 6, 15:59 UTC1h 25m
2026-06-05 N821QS CUN → FTY Jun 5, 20:40 UTCJun 5, 22:50 UTC2h 10m
2026-06-05 N821QS - Jun 5, 16:20 UTCJun 5, 18:35 UTC2h 15m
2026-06-05 EJA821 LAX → ILG Jun 5, 13:30 UTCJun 5, 15:05 UTC1h 35m
2026-06-04 EJA821 LAX → ILG Jun 4, 21:10 UTCJun 4, 21:55 UTC45m
2026-06-04 EJA821 LAX → ILG Jun 4, 15:15 UTCJun 4, 20:15 UTC5h 0m
2026-06-04 EJA821 LAX → ILG Jun 4, 13:40 UTCJun 4, 13:55 UTC15m
2026-06-03 EJA821 LAX → ILG Jun 3, 19:05 UTCJun 3, 22:25 UTC3h 20m
2026-06-03 EJA821 LAX → ILG Jun 3, 12:30 UTCJun 3, 15:25 UTC2h 55m
2026-06-03 EJA821 LAX → ILG Jun 3, 10:40 UTCJun 3, 10:55 UTC15m
2026-06-02 EJA821 LAX → ILG Jun 2, 20:30 UTCJun 2, 21:50 UTC1h 20m
2026-06-02 EJA821 LAX → ILG Jun 2, 17:45 UTCJun 2, 18:55 UTC1h 10m
2026-06-02 EJA821 LAX → ILG Jun 2, 15:35 UTCJun 2, 16:55 UTC1h 20m
2026-06-01 EJA821 LAX → ILG Jun 1, 22:35 UTCJun 1, 23:10 UTC35m
2026-06-01 EJA821 LAX → ILG Jun 1, 17:30 UTCJun 1, 21:25 UTC3h 55m
2026-06-01 EJA821 LAX → ILG Jun 1, 15:25 UTCJun 1, 16:25 UTC1h 0m
2026-05-31 EJA821 LAX → ILG May 31, 20:55 UTCJun 1, 02:20 UTC5h 25m
2026-05-31 EJA821 LAX → ILG May 31, 17:30 UTCMay 31, 18:35 UTC1h 5m
2026-05-31 EJA821 LAX → ILG May 31, 12:55 UTCMay 31, 13:25 UTC30m
2026-05-30 EJA821 LAX → ILG May 30, 21:05 UTCMay 30, 21:25 UTC20m
2026-05-30 EJA821 LAX → ILG May 30, 16:55 UTCMay 30, 19:25 UTC2h 30m
2026-05-30 EJA821 LAX → ILG May 30, 14:50 UTCMay 30, 15:00 UTC10m
2026-05-30 EJA821 LAX → ILG May 30, 00:00 UTCMay 30, 02:20 UTC2h 20m
2026-05-29 EJA821 LAX → ILG May 29, 22:35 UTCMay 29, 23:10 UTC35m
2026-05-29 EJA821 LAX → ILG May 29, 20:00 UTCMay 29, 20:25 UTC25m
2026-05-29 EJA821 LAX → ILG May 29, 14:25 UTCMay 29, 16:00 UTC1h 36m
2026-05-28 EJA821 LAX → ILG May 28, 19:10 UTCMay 28, 21:55 UTC2h 45m
2026-05-28 EJA821 LAX → ILG May 28, 14:10 UTCMay 28, 16:30 UTC2h 20m
2026-05-28 EJA821 LAX → ILG May 28, 12:00 UTCMay 28, 13:30 UTC1h 30m
2026-05-28 EJA821 LAX → ILG May 28, 03:50 UTCMay 28, 04:35 UTC45m
2026-05-28 EJA821 LAX → ILG May 28, 01:10 UTCMay 28, 02:50 UTC1h 40m
2026-05-28 EJA821 LAX → ILG May 28, 00:00 UTCMay 28, 00:15 UTC15m
2026-05-27 EJA821 LAX → ILG May 27, 21:05 UTCMay 27, 21:50 UTC45m
2026-05-27 EJA821 LAX → ILG May 27, 19:20 UTCMay 27, 20:00 UTC40m
2026-05-27 EJA821 LAX → ILG May 27, 17:10 UTCMay 27, 17:55 UTC45m
2026-05-26 N821QS - May 26, 23:39 UTCMay 27, 00:19 UTC40m
2026-05-26 N821QS - May 26, 22:25 UTCMay 26, 22:35 UTC10m

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 N821QS page for operator, model, and routing details .

Mode-S AB3601 frequently asked

What is Mode-S code AB3601?
AB3601 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821QS.
Where is Mode-S AB3601 registered?
Mode-S code AB3601 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 AB3601 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3601, octal 52633001, decimal 11,220,481.
What flights does AB3601 operate?
Mode-S AB3601 has broadcast 2 distinct callsigns, including EJA821, N821QS.