Apparatus

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sensors Mode-S transponder

AB0D57

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N811CT · CESSNA 172 Skyhawk · operated by BRAVO AIRCRAFT LLC

Hex
AB0D57
Octal
52606527
Decimal
11,210,071
Country
US
Tail
N811CT
Type
C172
Transponder active on ground
Flights observed
69
Distinct callsigns
1
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S AB0D57.

Country allocation

The ICAO 24-bit address AB0D57 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
AUB138 - 69 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-26 AUB138 AUO → AUO May 26, 12:45 UTCMay 26, 13:45 UTC1h 0m
2026-05-24 AUB138 AUO → AUO May 24, 02:10 UTCMay 24, 02:15 UTC5m
2026-05-24 AUB138 AUO → AUO May 24, 01:45 UTCMay 24, 01:55 UTC10m
2026-05-24 AUB138 AUO → AUO May 24, 01:25 UTCMay 24, 01:30 UTC5m
2026-05-22 AUB138 AUO → AUO May 22, 12:00 UTCMay 22, 13:05 UTC1h 5m
2026-05-21 AUB138 - May 21, 20:35 UTCMay 21, 20:55 UTC20m
2026-05-21 AUB138 - May 21, 19:45 UTCMay 21, 19:55 UTC10m
2026-05-21 AUB138 - May 21, 12:30 UTCMay 21, 13:30 UTC1h 0m
2026-05-20 AUB138 AUO → AUO May 20, 22:40 UTCMay 20, 23:45 UTC1h 5m
2026-05-20 AUB138 - May 20, 13:40 UTCMay 20, 13:55 UTC15m
2026-05-20 AUB138 - May 20, 11:50 UTCMay 20, 12:10 UTC20m
2026-05-19 AUB138 AUO → AUO May 19, 12:30 UTCMay 19, 13:45 UTC1h 15m
2026-05-19 AUB138 AUO → AUO May 19, 01:45 UTCMay 19, 01:55 UTC10m
2026-05-19 AUB138 AUO → AUO May 19, 01:25 UTCMay 19, 01:30 UTC5m
2026-05-16 AUB138 AUO → AUO May 16, 15:40 UTCMay 16, 16:50 UTC1h 10m
2026-05-15 AUB138 AUO → AUO May 15, 11:30 UTCMay 15, 12:45 UTC1h 15m
2026-05-14 AUB138 AUO → AUO May 14, 13:50 UTCMay 14, 14:55 UTC1h 5m
2026-05-13 AUB138 - May 13, 20:25 UTCMay 13, 20:35 UTC10m
2026-05-13 AUB138 - May 13, 19:30 UTCMay 13, 19:50 UTC20m
2026-05-13 AUB138 - May 13, 19:20 UTCMay 13, 19:25 UTC5m
2026-05-12 AUB138 - May 12, 02:45 UTCMay 12, 03:10 UTC25m
2026-05-08 AUB138 AUO → AUO May 8, 20:50 UTCMay 8, 22:10 UTC1h 20m
2026-05-08 AUB138 AUO → AUO May 8, 11:34 UTCMay 8, 12:44 UTC1h 10m
2026-05-07 AUB138 AUO → AUO May 7, 20:00 UTCMay 7, 21:10 UTC1h 10m
2026-05-06 AUB138 AUO → AUO May 6, 15:35 UTCMay 6, 16:45 UTC1h 10m
2026-05-05 AUB138 AUO → AUO May 5, 19:30 UTCMay 5, 20:40 UTC1h 10m
2026-05-05 AUB138 AUO → AUO May 5, 12:40 UTCMay 5, 13:35 UTC55m
2026-05-04 AUB138 - May 4, 17:30 UTCMay 4, 17:55 UTC25m
2026-05-04 AUB138 - May 4, 16:35 UTCMay 4, 16:55 UTC20m
2026-05-01 AUB138 AUO → AUO May 1, 20:35 UTCMay 1, 21:35 UTC1h 0m
2026-05-01 AUB138 AUO → AUO May 1, 17:15 UTCMay 1, 18:50 UTC1h 35m
2026-05-01 AUB138 AUO → AUO May 1, 12:10 UTCMay 1, 14:25 UTC2h 15m
2026-04-30 AUB138 AUO → AUO Apr 30, 22:05 UTCApr 30, 23:30 UTC1h 25m
2026-04-30 AUB138 AUO → AUO Apr 30, 13:25 UTCApr 30, 14:40 UTC1h 15m
2026-04-29 AUB138 AUO → AUO Apr 29, 16:50 UTCApr 29, 17:50 UTC1h 0m
2026-04-27 AUB138 - Apr 27, 23:15 UTCApr 27, 23:35 UTC20m
2026-04-27 AUB138 - Apr 27, 22:30 UTCApr 27, 22:45 UTC15m
2026-04-27 AUB138 AUO → AUO Apr 27, 17:30 UTCApr 27, 18:50 UTC1h 20m
2026-04-25 AUB138 AUO → AUO Apr 25, 19:30 UTCApr 25, 22:30 UTC3h 0m
2026-04-24 AUB138 AUO → AUO Apr 24, 21:30 UTCApr 24, 22:50 UTC1h 20m
2026-04-24 AUB138 AUO → AUO Apr 24, 19:15 UTCApr 24, 20:15 UTC1h 0m
2026-04-24 AUB138 - Apr 24, 17:15 UTCApr 24, 18:10 UTC55m
2026-04-24 AUB138 - Apr 24, 14:35 UTCApr 24, 15:20 UTC45m
2026-04-23 AUB138 AUO → AUO Apr 23, 20:05 UTCApr 23, 21:00 UTC55m
2026-04-23 AUB138 AUO → AUO Apr 23, 15:30 UTCApr 23, 16:45 UTC1h 15m
2026-04-22 AUB138 AUO → AUO Apr 22, 23:05 UTCApr 23, 00:15 UTC1h 10m
2026-04-22 AUB138 AUO → AUO Apr 22, 19:45 UTCApr 22, 20:20 UTC35m
2026-04-22 AUB138 AUO → AUO Apr 22, 14:50 UTCApr 22, 16:00 UTC1h 10m
2026-04-20 AUB138 AUO → AUO Apr 20, 20:15 UTCApr 20, 21:20 UTC1h 5m
2026-04-20 AUB138 AUO → AUO Apr 20, 16:10 UTCApr 20, 17:05 UTC55m

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 N811CT page for operator, model, and routing details .

Mode-S AB0D57 frequently asked

What is Mode-S code AB0D57?
AB0D57 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N811CT.
Where is Mode-S AB0D57 registered?
Mode-S code AB0D57 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 AB0D57 broadcasting right now?
Mode-S AB0D57 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB0D57, octal 52606527, decimal 11,210,071.
What flights does AB0D57 operate?
Mode-S AB0D57 has broadcast 1 distinct callsign, including AUB138.