Apparatus

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sensors Mode-S transponder

AD9039

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N973QS · CESSNA 680 Citation Latitude · operated by NORMANSTONE AVA LLC, BOSCH DOUGLAS, MCBG LIMITED CO, ORTEGA AVIATION LLC, DEAN RANDALL HUE TRUSTEE, DEAN CONNIE JO FIELDS TRUSTEE

Hex
AD9039
Octal
53310071
Decimal
11,374,649
Country
US
Tail
N973QS
Type
C68A
Transponder active on ground
Flights observed
250
Distinct callsigns
2
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AD9039.

Country allocation

The ICAO 24-bit address AD9039 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
EJA973 NetJets 234 2026-07-22
N973QS - 16 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 EJA973 ADS → TEB Jul 22, 19:35 UTCJul 22, 20:15 UTC40m
2026-07-22 EJA973 ADS → TEB Jul 22, 15:50 UTCJul 22, 18:00 UTC2h 10m
2026-07-22 EJA973 ADS → TEB Jul 22, 13:35 UTCJul 22, 13:45 UTC10m
2026-07-22 EJA973 ADS → TEB Jul 22, 03:45 UTCJul 22, 04:40 UTC55m
2026-07-22 EJA973 ADS → TEB Jul 22, 00:10 UTCJul 22, 02:55 UTC2h 45m
2026-07-21 EJA973 ADS → TEB Jul 21, 21:30 UTCJul 21, 22:10 UTC40m
2026-07-21 EJA973 ADS → TEB Jul 21, 19:15 UTCJul 21, 19:50 UTC35m
2026-07-21 EJA973 ADS → TEB Jul 21, 17:50 UTCJul 21, 18:05 UTC15m
2026-07-21 EJA973 ADS → TEB Jul 21, 01:40 UTCJul 21, 04:05 UTC2h 25m
2026-07-20 EJA973 ADS → TEB Jul 20, 22:15 UTCJul 20, 22:35 UTC20m
2026-07-20 EJA973 ADS → TEB Jul 20, 18:20 UTCJul 20, 20:50 UTC2h 30m
2026-07-20 EJA973 ADS → TEB Jul 20, 02:40 UTCJul 20, 06:05 UTC3h 25m
2026-07-10 EJA973 ILG → TEB Jul 10, 22:05 UTCJul 10, 22:45 UTC40m
2026-07-10 EJA973 YYC → ILG Jul 10, 16:45 UTCJul 10, 21:05 UTC4h 21m
2026-07-09 EJA973 - Jul 9, 20:20 UTCJul 10, 14:45 UTC18h 25m
2026-07-09 EJA973 - Jul 9, 19:50 UTCJul 10, 14:45 UTC18h 55m
2026-07-09 EJA973 - Jul 9, 17:40 UTCJul 9, 18:25 UTC45m
2026-07-09 EJA973 - Jul 9, 15:10 UTCJul 9, 16:35 UTC1h 25m
2026-07-09 EJA973 - Jul 9, 12:30 UTCJul 9, 13:30 UTC1h 0m
2026-07-07 EJA973 - Jul 7, 20:30 UTCJul 7, 21:50 UTC1h 20m
2026-07-07 EJA973 - Jul 7, 17:30 UTCJul 7, 19:30 UTC2h 0m
2026-07-07 EJA973 - Jul 7, 15:40 UTCJul 7, 15:50 UTC10m
2026-07-07 N973QS - Jul 7, 14:00 UTCJul 7, 14:25 UTC25m
2026-07-07 N973QS - Jul 7, 12:10 UTCJul 7, 12:35 UTC25m
2026-07-06 EJA973 - Jul 6, 19:10 UTCJul 6, 23:35 UTC4h 25m
2026-07-06 EJA973 - Jul 6, 16:05 UTCJul 6, 16:55 UTC50m
2026-07-06 EJA973 - Jul 6, 12:05 UTCJul 6, 14:30 UTC2h 25m
2026-07-06 EJA973 SGR → APA Jul 6, 01:35 UTCJul 6, 04:00 UTC2h 25m
2026-07-05 EJA973 - Jul 5, 21:50 UTCJul 6, 00:45 UTC2h 55m
2026-07-05 EJA973 - Jul 5, 19:35 UTCJul 5, 19:55 UTC20m
2026-07-05 EJA973 - Jul 5, 06:20 UTCJul 5, 06:45 UTC25m
2026-07-05 EJA973 LAS → BUR Jul 5, 04:00 UTCJul 5, 04:40 UTC40m
2026-07-04 EJA973 AUS → LAS Jul 4, 23:10 UTCJul 5, 01:50 UTC2h 40m
2026-07-04 EJA973 - Jul 4, 19:50 UTCJul 4, 21:20 UTC1h 30m
2026-07-04 EJA973 - Jul 4, 17:25 UTCJul 4, 18:40 UTC1h 15m
2026-07-04 EJA973 - Jul 4, 15:20 UTCJul 4, 15:30 UTC10m
2026-07-03 EJA973 - Jul 3, 21:35 UTCJul 3, 22:55 UTC1h 20m
2026-07-03 EJA973 - Jul 3, 18:50 UTCJul 3, 19:05 UTC15m
2026-07-03 EJA973 - Jul 3, 14:35 UTCJul 3, 17:25 UTC2h 50m
2026-07-02 EJA973 - Jul 2, 22:35 UTCJul 3, 00:35 UTC2h 0m
2026-07-02 EJA973 - Jul 2, 19:15 UTCJul 2, 21:20 UTC2h 5m
2026-07-02 EJA973 - Jul 2, 16:55 UTCJul 2, 18:05 UTC1h 10m
2026-07-01 EJA973 - Jul 1, 14:35 UTCJul 1, 16:55 UTC2h 20m
2026-07-01 EJA973 - Jul 1, 02:15 UTCJul 1, 04:55 UTC2h 40m
2026-06-30 N973QS - Jun 30, 23:40 UTCJul 1, 01:05 UTC1h 25m
2026-06-30 N973QS - Jun 30, 00:20 UTCJul 1, 00:15 UTC23h 56m
2026-06-29 N973QS - Jun 29, 23:54 UTCJun 30, 02:10 UTC2h 15m
2026-06-27 EJA973 - Jun 27, 18:39 UTCJun 27, 19:59 UTC1h 20m
2026-06-27 EJA973 - Jun 27, 16:39 UTCJun 27, 17:44 UTC1h 5m
2026-06-27 EJA973 - Jun 27, 01:24 UTCJun 27, 02:09 UTC45m

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 N973QS page for operator, model, and routing details .

Mode-S AD9039 frequently asked

What is Mode-S code AD9039?
AD9039 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N973QS.
Where is Mode-S AD9039 registered?
Mode-S code AD9039 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 AD9039 broadcasting right now?
Mode-S AD9039 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD9039, octal 53310071, decimal 11,374,649.
What flights does AD9039 operate?
Mode-S AD9039 has broadcast 2 distinct callsigns, including EJA973, N973QS.