Apparatus

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sensors Mode-S transponder

A1AD73

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N207QS · operated by NETJETS SALES INC

Hex
A1AD73
Octal
50326563
Decimal
10,595,699
Country
US
Tail
N207QS
No current signal · last broadcast 7d ago
Flights observed
81
Distinct callsigns
2
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S A1AD73.

Country allocation

The ICAO 24-bit address A1AD73 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
EJA207 NetJets 60 2026-05-26
N207QS - 21 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-26 EJA207 CMH → MDW May 26, 19:55 UTCMay 26, 21:04 UTC1h 10m
2026-05-26 EJA207 CMH → MDW May 26, 17:50 UTCMay 26, 18:30 UTC40m
2026-05-26 EJA207 CMH → MDW May 26, 15:54 UTCMay 26, 16:50 UTC55m
2026-05-25 EJA207 CMH → MDW May 25, 19:35 UTCMay 25, 21:40 UTC2h 5m
2026-05-25 EJA207 CMH → MDW May 25, 15:30 UTCMay 25, 16:25 UTC55m
2026-05-25 EJA207 CMH → MDW May 25, 14:15 UTCMay 25, 14:45 UTC30m
2026-05-25 EJA207 CMH → MDW May 25, 11:45 UTCMay 25, 12:45 UTC1h 0m
2026-05-24 EJA207 CMH → MDW May 24, 18:00 UTCMay 24, 21:00 UTC3h 0m
2026-05-22 N207QS - May 22, 16:20 UTCMay 22, 23:45 UTC7h 25m
2026-05-22 EJA207 CMH → MDW May 22, 01:05 UTCMay 22, 01:20 UTC15m
2026-05-21 EJA207 CMH → MDW May 21, 23:05 UTCMay 22, 00:25 UTC1h 20m
2026-05-21 EJA207 CMH → MDW May 21, 19:25 UTCMay 21, 20:55 UTC1h 30m
2026-05-21 EJA207 CMH → MDW May 21, 18:00 UTCMay 21, 18:30 UTC30m
2026-05-21 EJA207 CMH → MDW May 21, 04:25 UTCMay 21, 05:15 UTC50m
2026-05-20 EJA207 CMH → MDW May 20, 23:25 UTCMay 20, 23:45 UTC20m
2026-05-20 EJA207 CMH → MDW May 20, 20:55 UTCMay 20, 21:45 UTC50m
2026-05-20 EJA207 CMH → MDW May 20, 17:55 UTCMay 20, 18:50 UTC55m
2026-05-19 EJA207 CMH → MDW May 19, 23:45 UTCMay 20, 00:50 UTC1h 5m
2026-05-15 EJA207 CMH → MDW May 15, 17:30 UTCMay 15, 18:20 UTC50m
2026-05-14 EJA207 CMH → MDW May 14, 23:30 UTCMay 15, 00:30 UTC1h 0m
2026-05-14 EJA207 CMH → MDW May 14, 21:25 UTCMay 14, 22:15 UTC50m
2026-05-14 EJA207 CMH → MDW May 14, 17:05 UTCMay 14, 19:15 UTC2h 10m
2026-05-14 EJA207 CMH → MDW May 14, 13:10 UTCMay 14, 15:50 UTC2h 40m
2026-05-13 N207QS - May 13, 16:05 UTCMay 13, 22:45 UTC6h 40m
2026-05-12 EJA207 CMH → MDW May 12, 18:35 UTCMay 12, 23:30 UTC4h 55m
2026-05-12 EJA207 CMH → MDW May 12, 16:50 UTCMay 12, 17:10 UTC20m
2026-05-12 EJA207 CMH → MDW May 12, 13:30 UTCMay 12, 15:35 UTC2h 5m
2026-05-10 EJA207 CMH → MDW May 10, 22:25 UTCMay 10, 23:25 UTC1h 0m
2026-05-10 N207QS - May 10, 14:30 UTCMay 10, 19:45 UTC5h 15m
2026-05-08 EJA207 CMH → MDW May 8, 15:15 UTCMay 8, 17:40 UTC2h 25m
2026-05-08 EJA207 CMH → MDW May 8, 06:04 UTCMay 8, 06:39 UTC35m
2026-05-08 EJA207 CMH → MDW May 8, 00:25 UTCMay 8, 04:54 UTC4h 30m
2026-05-07 N207QS - May 7, 19:45 UTCMay 7, 22:50 UTC3h 5m
2026-05-06 N207QS - May 6, 18:00 UTCMay 6, 23:40 UTC5h 40m
2026-05-06 EJA207 CMH → MDW May 6, 13:55 UTCMay 6, 16:25 UTC2h 30m
2026-05-05 EJA207 CMH → MDW May 5, 17:25 UTCMay 5, 18:05 UTC40m
2026-05-05 EJA207 CMH → MDW May 5, 15:10 UTCMay 5, 15:20 UTC10m
2026-05-05 EJA207 CMH → MDW May 5, 13:35 UTCMay 5, 14:30 UTC55m
2026-05-04 EJA207 CMH → MDW May 4, 17:45 UTCMay 4, 20:20 UTC2h 36m
2026-05-03 EJA207 CMH → MDW May 3, 20:55 UTCMay 3, 23:15 UTC2h 20m
2026-05-03 EJA207 CMH → MDW May 3, 17:10 UTCMay 3, 19:34 UTC2h 25m
2026-05-02 EJA207 CMH → MDW May 2, 19:45 UTCMay 3, 01:05 UTC5h 20m
2026-05-02 N207QS - May 2, 12:50 UTCMay 2, 18:45 UTC5h 55m
2026-05-02 N207QS - May 2, 11:10 UTCMay 2, 11:55 UTC45m
2026-05-02 N207QS - May 2, 08:15 UTCMay 2, 08:55 UTC40m
2026-04-30 N207QS - Apr 30, 22:35 UTCMay 1, 05:40 UTC7h 5m
2026-04-30 EJA207 CMH → MDW Apr 30, 19:00 UTCApr 30, 19:25 UTC25m
2026-04-30 EJA207 CMH → MDW Apr 30, 14:30 UTCApr 30, 15:10 UTC40m
2026-04-30 EJA207 CMH → MDW Apr 30, 12:25 UTCApr 30, 13:15 UTC50m
2026-04-29 EJA207 CMH → MDW Apr 29, 18:15 UTCApr 29, 19:15 UTC1h 0m

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 N207QS page for operator, model, and routing details .

Mode-S A1AD73 frequently asked

What is Mode-S code A1AD73?
A1AD73 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N207QS.
Where is Mode-S A1AD73 registered?
Mode-S code A1AD73 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 A1AD73 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1AD73, octal 50326563, decimal 10,595,699.
What flights does A1AD73 operate?
Mode-S A1AD73 has broadcast 2 distinct callsigns, including EJA207, N207QS.