Apparatus

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sensors Mode-S transponder

A57C93

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4525B · AMERICAN AA-5 Tiger · operated by CMIS N4525B LLC

Hex
A57C93
Octal
51276223
Decimal
10,845,331
Country
US
Tail
N4525B
Type
AA5
No current signal · last broadcast 1d ago
Flights observed
48
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A57C93.

Country allocation

The ICAO 24-bit address A57C93 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
N4525B - 48 2026-06-15

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-15 N4525B OCN → OCN Jun 15, 22:54 UTCJun 15, 23:54 UTC1h 0m
2026-06-14 N4525B OCN → OCN Jun 14, 19:25 UTCJun 14, 20:35 UTC1h 10m
2026-06-14 N4525B OCN → OCN Jun 14, 17:05 UTCJun 14, 17:45 UTC40m
2026-06-13 N4525B HMT → OCN Jun 13, 17:45 UTCJun 13, 18:05 UTC20m
2026-06-13 N4525B OCN → HMT Jun 13, 15:50 UTCJun 13, 16:10 UTC20m
2026-06-11 N4525B OCN → OCN Jun 11, 21:00 UTCJun 11, 21:50 UTC50m
2026-06-11 N4525B - Jun 11, 01:40 UTCJun 11, 01:50 UTC10m
2026-06-11 N4525B CLD → CLD Jun 11, 00:10 UTCJun 11, 01:00 UTC50m
2026-06-10 N4525B OCN → CLD Jun 10, 20:15 UTCJun 10, 20:25 UTC10m
2026-06-10 N4525B - Jun 10, 17:00 UTCJun 10, 17:30 UTC30m
2026-06-10 N4525B - Jun 10, 01:50 UTCJun 10, 02:00 UTC10m
2026-06-09 N4525B - Jun 9, 01:00 UTCJun 9, 03:05 UTC2h 5m
2026-06-07 N4525B OCN → OCN Jun 7, 19:45 UTCJun 7, 20:40 UTC55m
2026-06-02 N4525B HMT → OCN Jun 2, 22:20 UTCJun 2, 23:00 UTC40m
2026-06-02 N4525B OCN → HMT Jun 2, 21:35 UTCJun 2, 22:05 UTC30m
2026-05-31 N4525B OCN → OCN May 31, 21:40 UTCMay 31, 23:05 UTC1h 25m
2026-05-30 N4525B HMT → OCN May 30, 18:05 UTCMay 30, 18:25 UTC20m
2026-05-30 N4525B OCN → HMT May 30, 15:35 UTCMay 30, 15:55 UTC20m
2026-05-28 N4525B HMT → OCN May 28, 19:00 UTCMay 28, 19:25 UTC25m
2026-05-28 N4525B OCN → HMT May 28, 17:20 UTCMay 28, 17:45 UTC25m
2026-05-24 N4525B - May 24, 20:25 UTCMay 24, 21:50 UTC1h 25m
2026-05-24 N4525B - May 24, 17:05 UTCMay 24, 18:05 UTC1h 0m
2026-05-21 N4525B HMT → OCN May 21, 19:55 UTCMay 21, 20:15 UTC20m
2026-05-21 N4525B OCN → HMT May 21, 17:55 UTCMay 21, 18:25 UTC30m
2026-05-21 N4525B - May 21, 01:20 UTCMay 21, 02:45 UTC1h 25m
2026-05-21 N4525B OCN → OCN May 21, 01:00 UTCMay 21, 01:15 UTC15m
2026-05-20 N4525B OCN → OCN May 20, 18:45 UTCMay 20, 19:00 UTC15m
2026-05-20 N4525B OCN → OCN May 20, 18:15 UTCMay 20, 18:40 UTC25m
2026-05-16 N4525B OCN → OCN May 16, 21:50 UTCMay 16, 22:00 UTC10m
2026-05-16 N4525B OCN → OCN May 16, 18:30 UTCMay 16, 18:55 UTC25m
2026-05-14 N4525B OCN → OCN May 14, 20:10 UTCMay 14, 21:00 UTC50m
2026-05-13 N4525B OCN → OCN May 13, 20:50 UTCMay 13, 21:55 UTC1h 5m
2026-05-10 N4525B OCN → OCN May 10, 21:00 UTCMay 10, 21:10 UTC10m
2026-05-10 N4525B OCN → OCN May 10, 20:14 UTCMay 10, 20:54 UTC40m
2026-05-09 N4525B HMT → OCN May 9, 18:00 UTCMay 9, 18:30 UTC30m
2026-05-09 N4525B OCN → HMT May 9, 15:40 UTCMay 9, 16:00 UTC20m
2026-05-07 N4525B - May 7, 18:15 UTCMay 7, 19:55 UTC1h 40m
2026-05-07 N4525B OCN → OCN May 7, 17:40 UTCMay 7, 17:50 UTC10m
2026-05-06 N4525B OCN → OCN May 6, 22:50 UTCMay 6, 23:25 UTC35m
2026-05-03 N4525B - May 3, 23:55 UTCMay 4, 00:05 UTC10m
2026-04-26 N4525B OCN → CLD Apr 26, 22:50 UTCApr 26, 23:00 UTC10m
2026-04-24 N4525B OCN → OCN Apr 24, 23:10 UTCApr 25, 00:05 UTC55m
2026-04-23 N4525B - Apr 23, 18:00 UTCApr 23, 18:15 UTC15m
2026-04-23 N4525B OCN → OCN Apr 23, 17:15 UTCApr 23, 17:55 UTC39m
2026-04-16 N4525B HMT → OCN Apr 16, 20:40 UTCApr 16, 21:10 UTC30m
2026-04-16 N4525B - Apr 16, 20:15 UTCApr 16, 20:35 UTC20m
2026-04-13 N4525B - Apr 13, 19:50 UTCApr 13, 21:15 UTC1h 25m
2026-04-13 N4525B - Apr 13, 17:35 UTCApr 13, 20:10 UTC2h 35m

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 N4525B page for operator, model, and routing details .

Mode-S A57C93 frequently asked

What is Mode-S code A57C93?
A57C93 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4525B.
Where is Mode-S A57C93 registered?
Mode-S code A57C93 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 A57C93 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57C93, octal 51276223, decimal 10,845,331.
What flights does A57C93 operate?
Mode-S A57C93 has broadcast 1 distinct callsign, including N4525B.