Apparatus

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sensors Mode-S transponder

A19E97

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N203QS · operated by NETJETS SALES INC

Hex
A19E97
Octal
50317227
Decimal
10,591,895
Country
US
Tail
N203QS
No current signal · last broadcast 1d ago
Flights observed
8
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A19E97.

Country allocation

The ICAO 24-bit address A19E97 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 1 distinct

Callsign Airline Flights Last seen
EJA203 NetJets 8 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 EJA203 CMH → MGM Apr 13, 19:50 UTCApr 13, 20:10 UTC20m
2026-04-13 EJA203 CMH → MGM Apr 13, 17:10 UTCApr 13, 20:10 UTC3h 0m
2026-04-13 EJA203 CMH → MGM Apr 13, 15:05 UTCApr 13, 15:45 UTC40m
2026-04-13 EJA203 CMH → MGM Apr 13, 12:20 UTCApr 13, 13:45 UTC1h 25m
2026-04-13 EJA203 CMH → MGM Apr 13, 11:55 UTCApr 13, 13:45 UTC1h 50m
2026-04-13 EJA203 CMH → MGM Apr 13, 10:35 UTCApr 13, 12:15 UTC1h 40m
2026-04-12 EJA203 CMH → MGM Apr 12, 19:05 UTCApr 12, 19:35 UTC30m
2026-04-12 EJA203 CMH → MGM Apr 12, 17:15 UTCApr 12, 18:15 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 N203QS page for operator, model, and routing details .

Mode-S A19E97 frequently asked

What is Mode-S code A19E97?
A19E97 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N203QS.
Where is Mode-S A19E97 registered?
Mode-S code A19E97 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 A19E97 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A19E97, octal 50317227, decimal 10,591,895.
What flights does A19E97 operate?
Mode-S A19E97 has broadcast 1 distinct callsign, including EJA203.