Apparatus

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sensors Mode-S transponder

A9D7EC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N733TU · CESSNA 172 Skyhawk · operated by CHRISTIANSEN AVIATION LLC

Hex
A9D7EC
Octal
52353754
Decimal
11,130,860
Country
US
Tail
N733TU
Type
C172
No current signal · last broadcast 4h ago
Flights observed
96
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A9D7EC.

Country allocation

The ICAO 24-bit address A9D7EC 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
AUB132 - 96 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 AUB132 AUO → AUO Jul 17, 17:20 UTCJul 17, 18:10 UTC50m
2026-07-16 AUB132 - Jul 16, 21:50 UTCJul 16, 22:25 UTC35m
2026-07-16 AUB132 - Jul 16, 19:30 UTCJul 16, 20:29 UTC1h 0m
2026-07-15 AUB132 - Jul 15, 19:45 UTCJul 15, 19:55 UTC10m
2026-07-15 AUB132 - Jul 15, 18:40 UTCJul 15, 18:55 UTC15m
2026-07-10 AUB132 AUO → AUO Jul 10, 18:35 UTCJul 10, 19:35 UTC1h 0m
2026-07-10 AUB132 AUO → AUO Jul 10, 14:30 UTCJul 10, 15:10 UTC40m
2026-07-09 AUB132 AUO → AUO Jul 9, 12:50 UTCJul 9, 13:35 UTC45m
2026-07-08 AUB132 AUO → AUO Jul 8, 20:35 UTCJul 8, 21:35 UTC1h 0m
2026-07-08 AUB132 AUO → AUO Jul 8, 15:00 UTCJul 8, 16:15 UTC1h 15m
2026-07-08 AUB132 AUO → AUO Jul 8, 01:20 UTCJul 8, 02:15 UTC55m
2026-07-07 AUB132 AUO → AUO Jul 7, 17:25 UTCJul 7, 19:45 UTC2h 20m
2026-07-06 AUB132 - Jul 6, 20:10 UTCJul 6, 20:30 UTC20m
2026-07-06 AUB132 - Jul 6, 18:55 UTCJul 6, 19:10 UTC15m
2026-07-02 AUB132 AUO → AUO Jul 2, 23:10 UTCJul 2, 23:45 UTC35m
2026-07-02 AUB132 - Jul 2, 16:50 UTCJul 2, 17:10 UTC20m
2026-07-02 AUB132 - Jul 2, 15:55 UTCJul 2, 16:20 UTC25m
2026-07-02 AUB132 AUO → AUO Jul 2, 02:50 UTCJul 2, 02:55 UTC5m
2026-07-02 AUB132 LGC → AUO Jul 2, 02:00 UTCJul 2, 02:45 UTC45m
2026-07-02 AUB132 - Jul 2, 01:10 UTCJul 2, 01:30 UTC20m
2026-07-01 AUB132 AUO → AUO Jul 1, 16:30 UTCJul 1, 17:35 UTC1h 5m
2026-06-30 AUB132 AUO → AUO Jun 30, 18:50 UTCJun 30, 19:00 UTC10m
2026-06-30 AUB132 AUO → AUO Jun 30, 17:35 UTCJun 30, 18:30 UTC55m
2026-06-26 AUB132 - Jun 26, 21:10 UTCJun 26, 21:15 UTC5m
2026-06-26 AUB132 - Jun 26, 20:04 UTCJun 26, 20:15 UTC10m
2026-06-25 AUB132 AUO → AUO Jun 25, 23:44 UTCJun 26, 00:59 UTC1h 15m
2026-06-25 AUB132 AUO → AUO Jun 25, 16:29 UTCJun 25, 17:39 UTC1h 10m
2026-06-24 AUB132 - Jun 24, 23:10 UTCJun 24, 23:14 UTC5m
2026-06-24 AUB132 - Jun 24, 22:04 UTCJun 24, 22:29 UTC25m
2026-06-24 AUB132 AUO → AUO Jun 24, 18:05 UTCJun 24, 19:34 UTC1h 30m
2026-06-24 AUB132 - Jun 24, 15:14 UTCJun 24, 15:24 UTC10m
2026-06-24 AUB132 - Jun 24, 14:09 UTCJun 24, 14:34 UTC25m
2026-06-23 AUB132 AUO → AUO Jun 23, 22:10 UTCJun 23, 23:10 UTC1h 0m
2026-06-23 AUB132 AUO → AUO Jun 23, 15:19 UTCJun 23, 16:14 UTC55m
2026-06-22 AUB132 AUO → AUO Jun 22, 21:35 UTCJun 22, 22:59 UTC1h 25m
2026-06-20 AUB132 - Jun 20, 16:14 UTCJun 20, 16:49 UTC35m
2026-06-20 AUB132 - Jun 20, 13:59 UTCJun 20, 14:59 UTC1h 0m
2026-06-13 AUB132 AUO → AUO Jun 13, 12:40 UTCJun 13, 14:15 UTC1h 35m
2026-06-12 AUB132 AUO → AUO Jun 12, 17:55 UTCJun 12, 19:35 UTC1h 40m
2026-06-05 AUB132 - Jun 5, 21:50 UTCJun 5, 22:45 UTC55m
2026-06-05 AUB132 - Jun 5, 17:25 UTCJun 5, 17:55 UTC30m
2026-06-05 AUB132 - Jun 5, 15:25 UTCJun 5, 16:30 UTC1h 5m
2026-05-14 AUB132 - May 14, 20:05 UTCMay 14, 21:30 UTC1h 25m
2026-05-14 AUB132 - May 14, 16:35 UTCMay 14, 17:20 UTC45m
2026-05-14 AUB132 - May 14, 13:40 UTCMay 14, 14:25 UTC45m
2026-05-11 AUB132 AUO → AUO May 11, 15:40 UTCMay 11, 16:55 UTC1h 15m
2026-05-08 AUB132 AUO → AUO May 8, 18:10 UTCMay 8, 19:50 UTC1h 40m
2026-04-30 AUB132 AUO → AUO Apr 30, 21:05 UTCApr 30, 22:35 UTC1h 30m
2026-04-30 AUB132 AUO → AUO Apr 30, 02:05 UTCApr 30, 02:10 UTC5m
2026-04-30 AUB132 AUO → AUO Apr 30, 00:35 UTCApr 30, 02:00 UTC1h 25m

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 N733TU page for operator, model, and routing details .

Mode-S A9D7EC frequently asked

What is Mode-S code A9D7EC?
A9D7EC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N733TU.
Where is Mode-S A9D7EC registered?
Mode-S code A9D7EC 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 A9D7EC broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D7EC, octal 52353754, decimal 11,130,860.
What flights does A9D7EC operate?
Mode-S A9D7EC has broadcast 1 distinct callsign, including AUB132.