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sensors Mode-S transponder

ADB04A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N981QS · operated by TEXTRON AVIATION INC

Hex
ADB04A
Octal
53330112
Decimal
11,382,858
Country
US
Tail
N981QS
Type
C68A
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
293
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S ADB04A.

Country allocation

The ICAO 24-bit address ADB04A 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
EJA981 NetJets 278 2026-07-26
N981QS - 15 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA981 LAS → YIP Jul 26, 18:55 UTCJul 26, 22:10 UTC3h 15m
2026-07-25 EJA981 LAS → YIP Jul 25, 20:15 UTCJul 25, 21:05 UTC50m
2026-07-25 EJA981 LAS → YIP Jul 25, 17:25 UTCJul 25, 18:50 UTC1h 25m
2026-07-25 EJA981 LAS → YIP Jul 25, 16:20 UTCJul 25, 16:40 UTC20m
2026-07-25 EJA981 LAS → YIP Jul 25, 11:15 UTCJul 25, 14:35 UTC3h 20m
2026-07-24 EJA981 LAS → YIP Jul 24, 22:00 UTCJul 25, 00:00 UTC2h 0m
2026-07-24 EJA981 LAS → YIP Jul 24, 18:55 UTCJul 24, 19:55 UTC1h 0m
2026-07-24 EJA981 LAS → YIP Jul 24, 16:30 UTCJul 24, 18:00 UTC1h 30m
2026-07-23 EJA981 LAS → YIP Jul 23, 23:35 UTCJul 24, 03:25 UTC3h 50m
2026-07-23 EJA981 LAS → YIP Jul 23, 16:05 UTCJul 23, 20:20 UTC4h 15m
2026-07-23 EJA981 LAS → YIP Jul 23, 01:50 UTCJul 23, 05:05 UTC3h 15m
2026-07-22 EJA981 LAS → YIP Jul 22, 23:10 UTCJul 23, 00:45 UTC1h 35m
2026-07-22 EJA981 LAS → YIP Jul 22, 22:00 UTCJul 22, 22:20 UTC20m
2026-07-22 EJA981 LAS → YIP Jul 22, 20:00 UTCJul 22, 20:40 UTC40m
2026-07-22 EJA981 LAS → YIP Jul 22, 18:35 UTCJul 22, 19:05 UTC30m
2026-07-22 EJA981 LAS → YIP Jul 22, 15:45 UTCJul 22, 17:15 UTC1h 30m
2026-07-22 EJA981 LAS → YIP Jul 22, 13:05 UTCJul 22, 14:20 UTC1h 15m
2026-07-21 EJA981 LAS → YIP Jul 21, 16:30 UTCJul 21, 17:05 UTC35m
2026-07-21 EJA981 LAS → YIP Jul 21, 14:40 UTCJul 21, 15:30 UTC50m
2026-07-21 EJA981 LAS → YIP Jul 21, 13:00 UTCJul 21, 13:15 UTC15m
2026-07-20 EJA981 LAS → YIP Jul 20, 20:50 UTCJul 20, 23:50 UTC3h 0m
2026-07-20 EJA981 LAS → YIP Jul 20, 19:10 UTCJul 20, 19:35 UTC25m
2026-07-20 EJA981 LAS → YIP Jul 20, 15:40 UTCJul 20, 18:30 UTC2h 50m
2026-07-20 EJA981 LAS → YIP Jul 20, 13:15 UTCJul 20, 14:15 UTC1h 0m
2026-07-20 EJA981 LAS → YIP Jul 20, 00:20 UTCJul 20, 01:25 UTC1h 5m
2026-07-19 EJA981 LAS → YIP Jul 19, 20:30 UTCJul 19, 21:30 UTC1h 0m
2026-07-19 EJA981 LAS → YIP Jul 19, 18:40 UTCJul 19, 19:45 UTC1h 5m
2026-07-19 EJA981 LAS → YIP Jul 19, 16:40 UTCJul 19, 17:30 UTC50m
2026-07-19 EJA981 LAS → YIP Jul 19, 14:00 UTCJul 19, 15:05 UTC1h 5m
2026-07-18 EJA981 - Jul 18, 23:05 UTCJul 18, 23:10 UTC5m
2026-07-18 EJA981 - Jul 18, 19:45 UTCJul 18, 22:30 UTC2h 45m
2026-07-18 EJA981 - Jul 18, 17:35 UTCJul 18, 18:25 UTC50m
2026-07-18 EJA981 - Jul 18, 14:25 UTCJul 18, 15:25 UTC1h 0m
2026-07-17 EJA981 - Jul 17, 20:40 UTCJul 17, 21:25 UTC45m
2026-07-17 EJA981 TEB → TTN Jul 17, 19:30 UTCJul 17, 19:45 UTC15m
2026-07-17 EJA981 - Jul 17, 17:05 UTCJul 17, 17:44 UTC40m
2026-07-17 EJA981 - Jul 17, 14:20 UTCJul 17, 15:29 UTC1h 10m
2026-07-16 EJA981 - Jul 16, 22:45 UTCJul 16, 23:15 UTC30m
2026-07-16 EJA981 - Jul 16, 19:55 UTCJul 16, 22:05 UTC2h 10m
2026-07-16 EJA981 - Jul 16, 17:05 UTCJul 16, 18:19 UTC1h 15m
2026-07-16 EJA981 - Jul 16, 15:55 UTCJul 16, 16:30 UTC35m
2026-07-13 EJA981 - Jul 13, 21:15 UTCJul 13, 23:25 UTC2h 10m
2026-07-13 EJA981 - Jul 13, 19:05 UTCJul 13, 19:50 UTC45m
2026-07-13 EJA981 - Jul 13, 17:15 UTCJul 13, 17:55 UTC40m
2026-07-13 EJA981 - Jul 13, 15:20 UTCJul 13, 15:50 UTC30m
2026-07-13 EJA981 - Jul 13, 14:20 UTCJul 13, 14:35 UTC15m
2026-07-13 EJA981 - Jul 13, 00:45 UTCJul 13, 01:05 UTC20m
2026-07-12 EJA981 - Jul 12, 21:25 UTCJul 12, 23:55 UTC2h 30m
2026-07-12 EJA981 - Jul 12, 18:20 UTCJul 12, 18:45 UTC25m
2026-07-12 EJA981 PDK → APF Jul 12, 15:55 UTCJul 12, 17:35 UTC1h 40m

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 N981QS page for operator, model, and routing details .

Mode-S ADB04A frequently asked

What is Mode-S code ADB04A?
ADB04A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N981QS.
Where is Mode-S ADB04A registered?
Mode-S code ADB04A 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 ADB04A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADB04A, octal 53330112, decimal 11,382,858.
What flights does ADB04A operate?
Mode-S ADB04A has broadcast 2 distinct callsigns, including EJA981, N981QS.