Apparatus

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sensors Mode-S transponder

A1DFEB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N22NY · PILATUS PC-12 · operated by ST JOHN AVIATION LLC

Hex
A1DFEB
Octal
50357753
Decimal
10,608,619
Country
US
Tail
N22NY
Type
PC12
No current signal · last broadcast 1h ago
Flights observed
134
Distinct callsigns
6
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1DFEB.

Country allocation

The ICAO 24-bit address A1DFEB 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 6 distinct

Callsign Airline Flights Last seen
CST502 - 39 2026-07-18
CST101 - 32 2026-07-20
CST797 - 27 2026-07-08
CST2 - 13 2026-07-19
CST1219 - 13 2026-07-09
CST77 - 10 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 CST101 - Jul 20, 18:00 UTCJul 20, 18:45 UTC45m
2026-07-20 CST101 - Jul 20, 11:45 UTCJul 20, 12:50 UTC1h 5m
2026-07-19 CST2 - Jul 19, 21:50 UTCJul 19, 22:10 UTC20m
2026-07-19 CST2 - Jul 19, 20:05 UTCJul 19, 20:20 UTC15m
2026-07-18 CST502 - Jul 18, 17:30 UTCJul 18, 17:40 UTC10m
2026-07-18 CST502 - Jul 18, 16:10 UTCJul 18, 16:50 UTC40m
2026-07-18 CST502 - Jul 18, 13:45 UTCJul 18, 14:25 UTC40m
2026-07-17 CST77 - Jul 17, 18:25 UTCJul 17, 18:44 UTC20m
2026-07-17 CST77 - Jul 17, 17:40 UTCJul 17, 17:55 UTC15m
2026-07-16 CST77 - Jul 16, 20:45 UTCJul 16, 22:49 UTC2h 5m
2026-07-16 CST77 - Jul 16, 19:10 UTCJul 16, 19:55 UTC45m
2026-07-16 CST77 - Jul 16, 17:05 UTCJul 16, 18:25 UTC1h 20m
2026-07-16 CST77 - Jul 16, 14:40 UTCJul 16, 15:35 UTC55m
2026-07-15 CST2 - Jul 15, 17:50 UTCJul 15, 18:45 UTC55m
2026-07-15 CST2 - Jul 15, 12:45 UTCJul 15, 13:45 UTC1h 0m
2026-07-13 CST2 - Jul 13, 17:35 UTCJul 13, 18:05 UTC30m
2026-07-13 CST2 - Jul 13, 11:40 UTCJul 13, 12:05 UTC25m
2026-07-12 CST77 - Jul 12, 22:25 UTCJul 12, 23:10 UTC45m
2026-07-12 CST77 - Jul 12, 20:20 UTCJul 12, 21:10 UTC50m
2026-07-11 CST502 - Jul 11, 23:05 UTCJul 11, 23:20 UTC15m
2026-07-11 CST502 - Jul 11, 21:00 UTCJul 11, 21:45 UTC45m
2026-07-11 CST502 - Jul 11, 12:55 UTCJul 11, 13:35 UTC40m
2026-07-11 CST502 - Jul 11, 11:35 UTCJul 11, 11:50 UTC15m
2026-07-10 CST502 - Jul 10, 17:35 UTCJul 10, 18:20 UTC45m
2026-07-10 CST502 - Jul 10, 15:55 UTCJul 10, 16:45 UTC50m
2026-07-10 CST502 - Jul 10, 14:40 UTCJul 10, 15:00 UTC20m
2026-07-10 CST502 - Jul 10, 13:10 UTCJul 10, 13:30 UTC20m
2026-07-09 CST1219 - Jul 9, 23:15 UTCJul 10, 00:20 UTC1h 5m
2026-07-09 CST2 - Jul 9, 17:55 UTCJul 9, 18:15 UTC20m
2026-07-09 CST2 - Jul 9, 17:00 UTCJul 9, 17:20 UTC20m
2026-07-08 CST797 - Jul 8, 22:25 UTCJul 8, 23:10 UTC45m
2026-07-08 CST797 - Jul 8, 12:45 UTCJul 8, 13:35 UTC50m
2026-07-07 CST797 - Jul 7, 14:20 UTCJul 7, 14:40 UTC20m
2026-07-07 CST797 - Jul 7, 13:15 UTCJul 7, 13:40 UTC25m
2026-07-05 CST502 - Jul 5, 20:05 UTCJul 5, 20:25 UTC20m
2026-07-05 CST502 - Jul 5, 18:10 UTCJul 5, 18:30 UTC20m
2026-07-02 CST1219 - Jul 2, 17:15 UTCJul 2, 17:30 UTC15m
2026-07-02 CST1219 - Jul 2, 16:25 UTCJul 2, 16:40 UTC15m
2026-06-30 CST797 - Jun 30, 14:25 UTCJun 30, 15:00 UTC35m
2026-06-30 CST797 - Jun 30, 13:00 UTCJun 30, 13:40 UTC40m
2026-06-28 CST502 - Jun 28, 18:59 UTCJun 28, 19:20 UTC20m
2026-06-28 CST502 - Jun 28, 16:55 UTCJun 28, 17:10 UTC15m
2026-06-27 CST502 - Jun 27, 20:04 UTCJun 27, 20:24 UTC20m
2026-06-27 CST502 - Jun 27, 18:09 UTCJun 27, 18:54 UTC45m
2026-06-27 CST502 - Jun 27, 13:55 UTCJun 27, 14:39 UTC45m
2026-06-26 CST502 - Jun 26, 21:55 UTCJun 26, 22:25 UTC30m
2026-06-26 CST502 - Jun 26, 16:24 UTCJun 26, 17:04 UTC40m
2026-06-26 CST502 - Jun 26, 14:15 UTCJun 26, 14:35 UTC20m
2026-06-24 CST77 - Jun 24, 14:29 UTCJun 24, 15:24 UTC55m
2026-06-24 CST77 - Jun 24, 11:50 UTCJun 24, 13:00 UTC1h 10m

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 N22NY page for operator, model, and routing details .

Mode-S A1DFEB frequently asked

What is Mode-S code A1DFEB?
A1DFEB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N22NY.
Where is Mode-S A1DFEB registered?
Mode-S code A1DFEB 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 A1DFEB broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1DFEB, octal 50357753, decimal 10,608,619.
What flights does A1DFEB operate?
Mode-S A1DFEB has broadcast 6 distinct callsigns, including CST502, CST101, CST797, CST2, CST1219.