Apparatus

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sensors Mode-S transponder

ABDDC6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N864AU · CESSNA 172 Skyhawk · operated by AUBURN UNIVERSITY

Hex
ABDDC6
Octal
52756706
Decimal
11,263,430
Country
US
Tail
N864AU
Type
C172
No current signal · last broadcast 19h ago
Flights observed
78
Distinct callsigns
1
Country
US
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S ABDDC6.

Country allocation

The ICAO 24-bit address ABDDC6 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
AUB156 - 78 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 AUB156 AUO → AUO Jun 12, 16:25 UTCJun 12, 17:35 UTC1h 10m
2026-06-11 AUB156 AUO → AUO Jun 11, 21:40 UTCJun 12, 00:10 UTC2h 30m
2026-06-11 AUB156 - Jun 11, 19:35 UTCJun 11, 20:00 UTC25m
2026-06-11 AUB156 - Jun 11, 18:05 UTCJun 11, 18:15 UTC10m
2026-06-11 AUB156 - Jun 11, 16:55 UTCJun 11, 17:10 UTC15m
2026-06-10 AUB156 AUO → AUO Jun 10, 21:30 UTCJun 10, 22:40 UTC1h 10m
2026-06-10 AUB156 - Jun 10, 16:15 UTCJun 10, 17:40 UTC1h 25m
2026-06-10 AUB156 - Jun 10, 15:30 UTCJun 10, 15:45 UTC15m
2026-06-05 AUB156 - Jun 5, 23:00 UTCJun 5, 23:05 UTC5m
2026-06-05 AUB156 - Jun 5, 20:30 UTCJun 5, 21:15 UTC45m
2026-06-05 AUB156 AUO → AUO Jun 5, 17:05 UTCJun 5, 18:25 UTC1h 20m
2026-06-04 AUB156 AUO → AUO Jun 4, 22:30 UTCJun 4, 23:35 UTC1h 5m
2026-06-04 AUB156 - Jun 4, 20:10 UTCJun 4, 20:25 UTC15m
2026-06-04 AUB156 - Jun 4, 18:15 UTCJun 4, 19:05 UTC50m
2026-06-04 AUB156 - Jun 4, 15:40 UTCJun 4, 16:05 UTC25m
2026-06-04 AUB156 - Jun 4, 14:20 UTCJun 4, 14:50 UTC30m
2026-06-03 AUB156 AUO → AUO Jun 3, 23:10 UTCJun 4, 00:05 UTC55m
2026-06-03 AUB156 - Jun 3, 17:30 UTCJun 3, 17:55 UTC25m
2026-06-03 AUB156 - Jun 3, 14:55 UTCJun 3, 15:45 UTC50m
2026-06-02 AUB156 - Jun 2, 23:10 UTCJun 2, 23:20 UTC10m
2026-06-02 AUB156 - Jun 2, 22:00 UTCJun 2, 22:10 UTC10m
2026-06-02 AUB156 AUO → AUO Jun 2, 18:25 UTCJun 2, 20:10 UTC1h 45m
2026-05-29 AUB156 AUO → AUO May 29, 22:45 UTCMay 30, 00:20 UTC1h 35m
2026-05-29 AUB156 AUO → AUO May 29, 13:35 UTCMay 29, 15:00 UTC1h 25m
2026-05-28 AUB156 - May 28, 21:05 UTCMay 28, 21:15 UTC10m
2026-05-28 AUB156 - May 28, 19:55 UTCMay 28, 20:10 UTC15m
2026-05-28 AUB156 AUO → AUO May 28, 15:50 UTCMay 28, 16:55 UTC1h 5m
2026-05-21 AUB156 AUO → AUO May 21, 11:55 UTCMay 21, 12:45 UTC50m
2026-05-20 AUB156 - May 20, 12:15 UTCMay 20, 12:35 UTC20m
2026-05-20 AUB156 - May 20, 11:30 UTCMay 20, 11:40 UTC10m
2026-05-19 AUB156 AUO → AUO May 19, 22:40 UTCMay 19, 23:50 UTC1h 10m
2026-05-19 AUB156 AUO → AUO May 19, 12:35 UTCMay 19, 13:55 UTC1h 20m
2026-05-19 AUB156 AUO → AUO May 19, 02:05 UTCMay 19, 02:10 UTC5m
2026-05-19 AUB156 AUO → AUO May 19, 01:10 UTCMay 19, 01:20 UTC10m
2026-05-16 AUB156 AUO → AUO May 16, 15:25 UTCMay 16, 16:25 UTC1h 0m
2026-05-15 AUB156 - May 15, 15:45 UTCMay 15, 15:55 UTC10m
2026-05-15 AUB156 - May 15, 14:35 UTCMay 15, 14:55 UTC19m
2026-05-14 AUB156 AUO → AUO May 14, 13:30 UTCMay 14, 15:01 UTC1h 30m
2026-05-13 AUB156 AUO → AUO May 13, 19:15 UTCMay 13, 20:30 UTC1h 15m
2026-05-08 AUB156 AUO → AUO May 8, 20:30 UTCMay 8, 21:10 UTC40m
2026-05-07 AUB156 AUO → AUO May 7, 19:25 UTCMay 7, 20:40 UTC1h 15m
2026-05-06 AUB156 AUO → AUO May 6, 13:30 UTCMay 6, 15:00 UTC1h 30m
2026-05-05 AUB156 AUO → AUO May 5, 19:10 UTCMay 5, 20:35 UTC1h 25m
2026-05-05 AUB156 AUO → AUO May 5, 12:05 UTCMay 5, 13:20 UTC1h 15m
2026-05-04 AUB156 - May 4, 18:50 UTCMay 4, 19:15 UTC25m
2026-05-04 AUB156 - May 4, 17:50 UTCMay 4, 18:10 UTC20m
2026-05-04 AUB156 AUO → AUO May 4, 11:45 UTCMay 4, 13:15 UTC1h 30m
2026-05-03 AUB156 BNA → AUO May 3, 21:10 UTCMay 3, 23:15 UTC2h 5m
2026-05-03 AUB156 AUO → BNA May 3, 15:50 UTCMay 3, 18:25 UTC2h 35m
2026-05-02 AUB156 - May 2, 21:55 UTCMay 2, 23:05 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 N864AU page for operator, model, and routing details .

Mode-S ABDDC6 frequently asked

What is Mode-S code ABDDC6?
ABDDC6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N864AU.
Where is Mode-S ABDDC6 registered?
Mode-S code ABDDC6 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 ABDDC6 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABDDC6, octal 52756706, decimal 11,263,430.
What flights does ABDDC6 operate?
Mode-S ABDDC6 has broadcast 1 distinct callsign, including AUB156.