Apparatus

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sensors Mode-S transponder

A9E850

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73761 · CESSNA 172 Skyhawk · operated by SPRING CITY AVIATION INC

Hex
A9E850
Octal
52364120
Decimal
11,135,056
Country
US
Tail
N73761
Type
C172
No current signal · last broadcast 7h ago
Flights observed
140
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A9E850.

Country allocation

The ICAO 24-bit address A9E850 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
N73761 - 140 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 N73761 - May 30, 00:00 UTCMay 30, 01:35 UTC1h 35m
2026-05-29 N73761 - May 29, 21:45 UTCMay 29, 22:55 UTC1h 10m
2026-05-29 N73761 UES → UES May 29, 19:40 UTCMay 29, 20:55 UTC1h 15m
2026-05-29 N73761 UES → UES May 29, 17:50 UTCMay 29, 18:45 UTC55m
2026-05-29 N73761 UES → UES May 29, 13:10 UTCMay 29, 14:20 UTC1h 10m
2026-05-28 N73761 - May 28, 20:55 UTCMay 28, 22:10 UTC1h 15m
2026-05-28 N73761 UES → UES May 28, 18:55 UTCMay 28, 19:55 UTC1h 0m
2026-05-28 N73761 UES → UES May 28, 15:45 UTCMay 28, 17:05 UTC1h 20m
2026-05-28 N73761 - May 28, 13:40 UTCMay 28, 14:55 UTC1h 15m
2026-05-27 N73761 - May 27, 21:40 UTCMay 27, 22:40 UTC1h 0m
2026-05-27 N73761 UES → UES May 27, 19:35 UTCMay 27, 20:40 UTC1h 5m
2026-05-27 N73761 UES → UES May 27, 17:35 UTCMay 27, 19:00 UTC1h 25m
2026-05-27 N73761 UES → UES May 27, 15:35 UTCMay 27, 16:55 UTC1h 20m
2026-05-27 N73761 UES → UES May 27, 13:50 UTCMay 27, 14:55 UTC1h 5m
2026-05-27 N73761 UES → UES May 27, 11:25 UTCMay 27, 13:00 UTC1h 35m
2026-05-27 N73761 - May 27, 00:04 UTCMay 27, 01:09 UTC1h 5m
2026-05-26 N73761 UES → UES May 26, 21:40 UTCMay 26, 22:54 UTC1h 15m
2026-05-26 N73761 UES → UES May 26, 19:30 UTCMay 26, 20:50 UTC1h 20m
2026-05-26 N73761 UES → UES May 26, 17:55 UTCMay 26, 18:45 UTC50m
2026-05-26 N73761 UES → UES May 26, 16:24 UTCMay 26, 16:59 UTC35m
2026-05-26 N73761 UES → UES May 26, 13:45 UTCMay 26, 14:50 UTC1h 5m
2026-05-25 N73761 - May 25, 23:35 UTCMay 26, 00:49 UTC1h 15m
2026-05-25 N73761 - May 25, 22:10 UTCMay 25, 22:34 UTC25m
2026-05-25 N73761 - May 25, 17:40 UTCMay 25, 18:00 UTC20m
2026-05-25 N73761 - May 25, 15:00 UTCMay 25, 15:25 UTC25m
2026-05-25 N73761 - May 25, 12:40 UTCMay 25, 13:15 UTC35m
2026-05-24 N73761 - May 24, 19:50 UTCMay 24, 20:40 UTC50m
2026-05-24 N73761 - May 24, 17:40 UTCMay 24, 18:50 UTC1h 10m
2026-05-24 N73761 UES → UES May 24, 15:50 UTCMay 24, 16:50 UTC1h 0m
2026-05-23 N73761 UES → UES May 23, 23:55 UTCMay 24, 01:05 UTC1h 10m
2026-05-23 N73761 - May 23, 21:50 UTCMay 23, 23:00 UTC1h 10m
2026-05-23 N73761 - May 23, 19:45 UTCMay 23, 20:55 UTC1h 10m
2026-05-23 N73761 - May 23, 17:30 UTCMay 23, 18:55 UTC1h 25m
2026-05-22 N73761 UES → UES May 22, 20:00 UTCMay 22, 21:15 UTC1h 15m
2026-05-22 N73761 - May 22, 17:45 UTCMay 22, 18:30 UTC45m
2026-05-22 N73761 UES → UES May 22, 15:45 UTCMay 22, 17:00 UTC1h 15m
2026-05-21 N73761 UES → UES May 21, 21:40 UTCMay 21, 22:30 UTC50m
2026-05-21 N73761 UES → UES May 21, 19:45 UTCMay 21, 20:40 UTC55m
2026-05-21 N73761 - May 21, 17:25 UTCMay 21, 18:45 UTC1h 20m
2026-05-21 N73761 UES → UES May 21, 15:35 UTCMay 21, 16:20 UTC45m
2026-05-21 N73761 - May 21, 13:50 UTCMay 21, 14:55 UTC1h 5m
2026-05-21 N73761 UES → UES May 21, 00:10 UTCMay 21, 01:10 UTC1h 0m
2026-05-20 N73761 UES → UES May 20, 21:40 UTCMay 20, 23:00 UTC1h 20m
2026-05-20 N73761 - May 20, 20:00 UTCMay 20, 21:00 UTC1h 0m
2026-05-20 N73761 - May 20, 17:25 UTCMay 20, 19:05 UTC1h 40m
2026-05-20 N73761 - May 20, 15:35 UTCMay 20, 16:40 UTC1h 5m
2026-05-20 N73761 UES → UES May 20, 13:45 UTCMay 20, 14:45 UTC1h 0m
2026-05-19 N73761 - May 19, 01:00 UTCMay 19, 01:45 UTC45m
2026-05-08 N73761 - May 8, 20:00 UTCMay 8, 20:55 UTC55m
2026-05-08 N73761 UES → UES May 8, 17:30 UTCMay 8, 18:35 UTC1h 5m

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 N73761 page for operator, model, and routing details .

Mode-S A9E850 frequently asked

What is Mode-S code A9E850?
A9E850 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73761.
Where is Mode-S A9E850 registered?
Mode-S code A9E850 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 A9E850 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9E850, octal 52364120, decimal 11,135,056.
What flights does A9E850 operate?
Mode-S A9E850 has broadcast 1 distinct callsign, including N73761.