Apparatus

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sensors Mode-S transponder

AD1D73

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N944QS · operated by DHARMA EAGLE LLC, BANK OF UTAH TRUSTEE, RODRIGUEZ CARLOS, REARDON DANIEL, DRAGONFLY THERAPEUTICS INC, GENEVA PACIFIC AIR LLC

Hex
AD1D73
Octal
53216563
Decimal
11,345,267
Country
US
Tail
N944QS
Type
C68A
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
237
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AD1D73.

Country allocation

The ICAO 24-bit address AD1D73 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
EJA944 NetJets 234 2026-07-26
N944QS - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA944 LAX → DAL Jul 26, 22:05 UTCJul 26, 22:45 UTC40m
2026-07-26 EJA944 LAX → DAL Jul 26, 20:30 UTCJul 26, 20:50 UTC20m
2026-07-26 EJA944 LAX → DAL Jul 26, 17:30 UTCJul 26, 19:25 UTC1h 55m
2026-07-25 EJA944 LAX → DAL Jul 25, 20:50 UTCJul 26, 19:25 UTC22h 36m
2026-07-25 EJA944 LAX → DAL Jul 25, 19:50 UTCJul 26, 18:45 UTC22h 55m
2026-07-23 EJA944 LAX → DAL Jul 23, 21:00 UTCJul 23, 22:25 UTC1h 25m
2026-07-23 EJA944 LAX → DAL Jul 23, 19:00 UTCJul 23, 20:05 UTC1h 5m
2026-07-23 EJA944 LAX → DAL Jul 23, 16:45 UTCJul 23, 17:15 UTC30m
2026-07-23 EJA944 LAX → DAL Jul 23, 13:20 UTCJul 23, 15:05 UTC1h 45m
2026-07-22 EJA944 LAX → DAL Jul 22, 17:20 UTCJul 22, 19:40 UTC2h 20m
2026-07-20 EJA944 LAX → DAL Jul 20, 06:40 UTCJul 20, 06:50 UTC10m
2026-07-20 EJA944 LAX → DAL Jul 20, 05:15 UTCJul 20, 05:55 UTC40m
2026-07-20 EJA944 LAX → DAL Jul 20, 02:10 UTCJul 20, 04:05 UTC1h 55m
2026-07-19 EJA944 LAX → DAL Jul 19, 21:45 UTCJul 20, 00:00 UTC2h 15m
2026-07-19 EJA944 LAX → DAL Jul 19, 19:25 UTCJul 19, 19:55 UTC30m
2026-07-19 EJA944 LAX → DAL Jul 19, 15:15 UTCJul 19, 17:40 UTC2h 25m
2026-07-18 EJA944 LAX → DAL Jul 18, 22:20 UTCJul 18, 23:25 UTC1h 5m
2026-07-18 EJA944 LAX → DAL Jul 18, 21:10 UTCJul 18, 21:40 UTC30m
2026-07-18 EJA944 LAX → DAL Jul 18, 18:45 UTCJul 18, 19:35 UTC50m
2026-07-18 EJA944 LAX → DAL Jul 18, 16:05 UTCJul 18, 16:50 UTC45m
2026-07-17 EJA944 LAX → DAL Jul 17, 22:40 UTCJul 17, 23:05 UTC25m
2026-07-17 EJA944 LAX → DAL Jul 17, 20:35 UTCJul 17, 22:00 UTC1h 25m
2026-07-17 EJA944 LAX → DAL Jul 17, 13:50 UTCJul 17, 19:05 UTC5h 15m
2026-07-16 EJA944 - Jul 16, 23:40 UTCJul 17, 00:25 UTC45m
2026-07-16 EJA944 - Jul 16, 22:19 UTCJul 16, 23:10 UTC50m
2026-07-16 EJA944 - Jul 16, 20:19 UTCJul 16, 21:19 UTC1h 0m
2026-07-16 EJA944 AUS → DAL Jul 16, 17:54 UTCJul 16, 18:40 UTC45m
2026-07-16 EJA944 DAL → AUS Jul 16, 14:10 UTCJul 16, 14:50 UTC40m
2026-07-16 EJA944 - Jul 16, 01:20 UTCJul 16, 04:10 UTC2h 50m
2026-07-15 EJA944 - Jul 15, 23:55 UTCJul 16, 00:20 UTC25m
2026-07-15 EJA944 - Jul 15, 19:40 UTCJul 15, 22:30 UTC2h 50m
2026-07-15 EJA944 ADS → DAL Jul 15, 17:35 UTCJul 15, 17:45 UTC10m
2026-07-15 EJA944 NGW → ADS Jul 15, 15:25 UTCJul 15, 16:35 UTC1h 10m
2026-07-15 EJA944 - Jul 15, 13:15 UTCJul 15, 14:15 UTC1h 0m
2026-07-10 EJA944 - Jul 10, 21:15 UTCJul 10, 21:35 UTC20m
2026-07-10 EJA944 - Jul 10, 16:50 UTCJul 10, 20:25 UTC3h 35m
2026-07-10 N944QS - Jul 10, 14:30 UTCJul 10, 16:10 UTC1h 40m
2026-07-10 N944QS - Jul 10, 12:25 UTCJul 10, 13:10 UTC45m
2026-07-09 N944QS - Jul 9, 16:55 UTCJul 9, 20:35 UTC3h 40m
2026-07-08 EJA944 LAX → DAL Jul 8, 20:00 UTCJul 8, 23:55 UTC3h 55m
2026-07-08 EJA944 LAX → DAL Jul 8, 16:45 UTCJul 8, 18:15 UTC1h 30m
2026-07-08 EJA944 LAX → DAL Jul 8, 13:00 UTCJul 8, 13:35 UTC35m
2026-07-08 EJA944 LAX → DAL Jul 8, 03:05 UTCJul 8, 04:45 UTC1h 40m
2026-07-07 EJA944 LAX → DAL Jul 7, 20:45 UTCJul 7, 21:05 UTC20m
2026-07-07 EJA944 LAX → DAL Jul 7, 19:15 UTCJul 7, 19:55 UTC40m
2026-07-07 EJA944 LAX → DAL Jul 7, 17:10 UTCJul 7, 17:40 UTC30m
2026-07-07 EJA944 LAX → DAL Jul 7, 15:15 UTCJul 7, 16:10 UTC55m
2026-07-07 EJA944 LAX → DAL Jul 7, 13:15 UTCJul 7, 13:45 UTC30m
2026-07-07 EJA944 LAX → DAL Jul 7, 07:30 UTCJul 7, 09:50 UTC2h 20m
2026-07-07 EJA944 LAX → DAL Jul 7, 05:35 UTCJul 7, 06:15 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 N944QS page for operator, model, and routing details .

Mode-S AD1D73 frequently asked

What is Mode-S code AD1D73?
AD1D73 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N944QS.
Where is Mode-S AD1D73 registered?
Mode-S code AD1D73 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 AD1D73 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1D73, octal 53216563, decimal 11,345,267.
What flights does AD1D73 operate?
Mode-S AD1D73 has broadcast 2 distinct callsigns, including EJA944, N944QS.