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sensors Mode-S transponder

A9D7C8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N733SH · CESSNA 172 Skyhawk · operated by CHRISTIANSEN AVIATION LLC

Hex
A9D7C8
Octal
52353710
Decimal
11,130,824
Country
US
Tail
N733SH
Type
C172
Broadcasting now · callsign AUB131 · 2,950 ft
Flights observed
119
Distinct callsigns
1
Country
US
Last broadcast
20h ago

Current position

A9D7C8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A9D7C8 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
AUB131 - 119 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 AUB131 - Jul 20, 20:05 UTCJul 20, 20:30 UTC25m
2026-07-20 AUB131 - Jul 20, 19:00 UTCJul 20, 19:25 UTC25m
2026-07-20 AUB131 AUO → AUO Jul 20, 15:15 UTCJul 20, 17:35 UTC2h 20m
2026-07-11 AUB131 AUO → AUO Jul 11, 14:40 UTCJul 11, 15:45 UTC1h 5m
2026-07-11 AUB131 AUO → AUO Jul 11, 12:15 UTCJul 11, 13:05 UTC50m
2026-07-10 AUB131 AUO → AUO Jul 10, 20:10 UTCJul 10, 21:20 UTC1h 10m
2026-07-10 AUB131 AUO → AUO Jul 10, 17:15 UTCJul 10, 18:35 UTC1h 20m
2026-07-10 AUB131 - Jul 10, 13:05 UTCJul 10, 13:30 UTC25m
2026-07-10 AUB131 - Jul 10, 11:55 UTCJul 10, 12:05 UTC10m
2026-07-09 AUB131 AUO → AUO Jul 9, 17:15 UTCJul 9, 18:25 UTC1h 10m
2026-07-09 AUB131 AUO → AUO Jul 9, 12:25 UTCJul 9, 13:55 UTC1h 30m
2026-07-08 AUB131 AUO → AUO Jul 8, 21:40 UTCJul 8, 23:15 UTC1h 35m
2026-07-08 AUB131 - Jul 8, 18:25 UTCJul 8, 18:30 UTC5m
2026-07-08 AUB131 - Jul 8, 16:30 UTCJul 8, 16:45 UTC15m
2026-07-07 AUB131 AUO → AUO Jul 7, 21:15 UTCJul 7, 22:20 UTC1h 5m
2026-07-07 AUB131 AUO → AUO Jul 7, 13:10 UTCJul 7, 14:30 UTC1h 20m
2026-07-02 AUB131 AUO → AUO Jul 2, 20:30 UTCJul 2, 21:50 UTC1h 20m
2026-07-02 AUB131 - Jul 2, 15:20 UTCJul 2, 15:30 UTC10m
2026-07-02 AUB131 - Jul 2, 13:55 UTCJul 2, 14:15 UTC20m
2026-07-01 AUB131 AUO → AUO Jul 1, 19:55 UTCJul 1, 20:45 UTC50m
2026-07-01 AUB131 AUO → AUO Jul 1, 13:30 UTCJul 1, 14:45 UTC1h 15m
2026-06-30 AUB131 AUO → AUO Jun 30, 22:05 UTCJun 30, 22:35 UTC30m
2026-06-30 AUB131 - Jun 30, 19:25 UTCJun 30, 19:35 UTC10m
2026-06-30 AUB131 - Jun 30, 18:20 UTCJun 30, 18:35 UTC15m
2026-06-30 AUB131 AUO → AUO Jun 30, 12:35 UTCJun 30, 13:35 UTC1h 0m
2026-06-30 AUB131 AUO → AUO Jun 30, 01:30 UTCJun 30, 04:20 UTC2h 50m
2026-06-29 AUB131 - Jun 29, 21:09 UTCJun 29, 21:19 UTC10m
2026-06-29 AUB131 - Jun 29, 19:29 UTCJun 29, 20:09 UTC40m
2026-06-29 AUB131 AUO → AUO Jun 29, 13:30 UTCJun 29, 14:34 UTC1h 5m
2026-06-26 AUB131 - Jun 26, 17:25 UTCJun 26, 17:29 UTC5m
2026-06-26 AUB131 - Jun 26, 16:30 UTCJun 26, 16:44 UTC15m
2026-06-25 AUB131 AUO → AUO Jun 25, 21:10 UTCJun 25, 22:14 UTC1h 5m
2026-06-25 AUB131 - Jun 25, 16:45 UTCJun 25, 16:55 UTC10m
2026-06-25 AUB131 - Jun 25, 15:29 UTCJun 25, 15:40 UTC10m
2026-06-24 AUB131 - Jun 24, 17:34 UTCJun 24, 17:40 UTC5m
2026-06-24 AUB131 - Jun 24, 16:29 UTCJun 24, 16:40 UTC10m
2026-06-24 AUB131 AUO → AUO Jun 24, 11:45 UTCJun 24, 12:54 UTC1h 10m
2026-06-23 AUB131 AUO → AUO Jun 23, 20:49 UTCJun 23, 22:19 UTC1h 30m
2026-06-23 AUB131 AUO → AUO Jun 23, 16:54 UTCJun 23, 18:20 UTC1h 25m
2026-06-23 AUB131 - Jun 23, 12:49 UTCJun 23, 14:39 UTC1h 50m
2026-06-22 AUB131 AUO → AUO Jun 22, 20:49 UTCJun 22, 21:30 UTC40m
2026-06-15 AUB131 AUO → AUO Jun 15, 19:00 UTCJun 15, 20:25 UTC1h 25m
2026-06-13 AUB131 AUO → AUO Jun 13, 01:25 UTCJun 13, 02:30 UTC1h 5m
2026-06-12 AUB131 - Jun 12, 16:45 UTCJun 12, 16:55 UTC10m
2026-06-12 AUB131 - Jun 12, 15:50 UTCJun 12, 16:05 UTC15m
2026-06-11 AUB131 AUO → AUO Jun 11, 23:45 UTCJun 12, 02:25 UTC2h 41m
2026-06-11 AUB131 AUO → AUO Jun 11, 11:05 UTCJun 11, 12:40 UTC1h 35m
2026-06-10 AUB131 - Jun 10, 22:25 UTCJun 10, 23:20 UTC55m
2026-06-10 AUB131 - Jun 10, 20:45 UTCJun 10, 21:45 UTC1h 0m
2026-06-10 AUB131 AUO → AUO Jun 10, 15:20 UTCJun 10, 16:30 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 N733SH page for operator, model, and routing details .

Mode-S A9D7C8 frequently asked

What is Mode-S code A9D7C8?
A9D7C8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N733SH.
Where is Mode-S A9D7C8 registered?
Mode-S code A9D7C8 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 A9D7C8 broadcasting right now?
Yes. Mode-S A9D7C8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D7C8, octal 52353710, decimal 11,130,824.
What flights does A9D7C8 operate?
Mode-S A9D7C8 has broadcast 1 distinct callsign, including AUB131.