Apparatus

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sensors Mode-S transponder

A9EF3A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73929 · CESSNA 172 Skyhawk · operated by JPRG AVIATION INC

Hex
A9EF3A
Octal
52367472
Decimal
11,136,826
Country
US
Tail
N73929
Type
C172
No current signal · last broadcast 14h ago
Flights observed
126
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A9EF3A.

Country allocation

The ICAO 24-bit address A9EF3A 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
N73929 - 126 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N73929 ORL → ORL May 29, 17:05 UTCMay 29, 18:05 UTC1h 0m
2026-05-29 N73929 ORL → ORL May 29, 14:00 UTCMay 29, 15:30 UTC1h 30m
2026-05-28 N73929 ORL → ORL May 28, 11:35 UTCMay 28, 12:45 UTC1h 10m
2026-05-27 N73929 ORL → ORL May 27, 21:40 UTCMay 27, 22:20 UTC40m
2026-05-26 N73929 ORL → ORL May 26, 19:10 UTCMay 26, 20:29 UTC1h 20m
2026-05-26 N73929 ORL → ORL May 26, 16:30 UTCMay 26, 17:39 UTC1h 10m
2026-05-26 N73929 ORL → ORL May 26, 11:24 UTCMay 26, 12:40 UTC1h 15m
2026-05-25 N73929 - May 25, 12:45 UTCMay 25, 14:05 UTC1h 20m
2026-05-25 N73929 ORL → ORL May 25, 10:50 UTCMay 25, 12:35 UTC1h 45m
2026-05-23 N73929 ORL → ORL May 23, 13:20 UTCMay 23, 15:00 UTC1h 40m
2026-05-22 N73929 ORL → ORL May 22, 16:30 UTCMay 22, 17:40 UTC1h 10m
2026-05-22 N73929 ORL → ORL May 22, 13:30 UTCMay 22, 13:40 UTC10m
2026-05-22 N73929 ORL → ORL May 22, 12:25 UTCMay 22, 12:30 UTC5m
2026-05-22 N73929 ORL → ORL May 22, 12:10 UTCMay 22, 12:20 UTC10m
2026-05-22 N73929 ORL → ORL May 22, 11:45 UTCMay 22, 11:50 UTC5m
2026-05-21 N73929 ORL → ORL May 21, 19:05 UTCMay 21, 19:15 UTC10m
2026-05-21 N73929 ORL → ORL May 21, 18:30 UTCMay 21, 18:40 UTC10m
2026-05-21 N73929 ORL → ORL May 21, 18:20 UTCMay 21, 18:25 UTC5m
2026-05-21 N73929 ORL → ORL May 21, 14:50 UTCMay 21, 16:10 UTC1h 20m
2026-05-21 N73929 - May 21, 12:45 UTCMay 21, 12:50 UTC5m
2026-05-21 N73929 ORL → ORL May 21, 12:30 UTCMay 21, 12:40 UTC10m
2026-05-21 N73929 - May 21, 12:15 UTCMay 21, 12:25 UTC10m
2026-05-21 N73929 - May 21, 11:45 UTCMay 21, 11:55 UTC10m
2026-05-21 N73929 - May 21, 11:25 UTCMay 21, 11:40 UTC15m
2026-05-21 N73929 ORL → ORL May 21, 11:10 UTCMay 21, 11:20 UTC10m
2026-05-20 N73929 ORL → ORL May 20, 13:40 UTCMay 20, 14:50 UTC1h 10m
2026-05-20 N73929 ORL → ORL May 20, 11:00 UTCMay 20, 11:15 UTC15m
2026-05-19 N73929 - May 19, 15:00 UTCMay 19, 15:20 UTC20m
2026-05-19 N73929 ORL → ORL May 19, 14:30 UTCMay 19, 14:55 UTC25m
2026-05-19 N73929 ORL → ORL May 19, 10:50 UTCMay 19, 12:25 UTC1h 35m
2026-05-18 N73929 ORL → ORL May 18, 13:50 UTCMay 18, 15:05 UTC1h 15m
2026-05-18 N73929 ORL → ORL May 18, 11:00 UTCMay 18, 11:45 UTC45m
2026-05-17 N73929 ORL → ORL May 17, 13:50 UTCMay 17, 15:05 UTC1h 15m
2026-05-16 N73929 ORL → ORL May 16, 15:45 UTCMay 16, 17:01 UTC1h 15m
2026-05-16 N73929 ORL → ORL May 16, 13:55 UTCMay 16, 14:35 UTC40m
2026-05-15 N73929 ORL → ORL May 15, 21:20 UTCMay 15, 22:40 UTC1h 20m
2026-05-15 N73929 ORL → ORL May 15, 13:40 UTCMay 15, 14:45 UTC1h 5m
2026-05-15 N73929 ORL → ORL May 15, 10:50 UTCMay 15, 11:55 UTC1h 5m
2026-05-14 N73929 - May 14, 23:50 UTCMay 15, 00:15 UTC25m
2026-05-14 N73929 ORL → ORL May 14, 23:20 UTCMay 14, 23:35 UTC15m
2026-05-14 N73929 - May 14, 21:50 UTCMay 14, 22:30 UTC40m
2026-05-14 N73929 ORL → ORL May 14, 10:50 UTCMay 14, 12:10 UTC1h 20m
2026-05-13 N73929 ORL → ORL May 13, 23:30 UTCMay 14, 00:00 UTC30m
2026-05-13 N73929 ORL → ORL May 13, 16:35 UTCMay 13, 17:50 UTC1h 15m
2026-05-12 N73929 ORL → ORL May 12, 14:10 UTCMay 12, 14:55 UTC45m
2026-05-12 N73929 ORL → ORL May 12, 11:20 UTCMay 12, 12:05 UTC45m
2026-05-11 N73929 ORL → ORL May 11, 16:10 UTCMay 11, 17:40 UTC1h 30m
2026-05-09 N73929 ORL → ORL May 9, 14:00 UTCMay 9, 14:50 UTC50m
2026-05-08 N73929 ORL → ORL May 8, 19:15 UTCMay 8, 20:05 UTC50m
2026-05-08 N73929 ORL → ORL May 8, 11:25 UTCMay 8, 11:55 UTC30m

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 N73929 page for operator, model, and routing details .

Mode-S A9EF3A frequently asked

What is Mode-S code A9EF3A?
A9EF3A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73929.
Where is Mode-S A9EF3A registered?
Mode-S code A9EF3A 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 A9EF3A broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9EF3A, octal 52367472, decimal 11,136,826.
What flights does A9EF3A operate?
Mode-S A9EF3A has broadcast 1 distinct callsign, including N73929.