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 9d ago
Flights observed
94
Distinct callsigns
1
Country
US
Last broadcast
9d 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 - 94 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N4525B OCN → OCN Jul 24, 23:55 UTCJul 25, 01:05 UTC1h 10m
2026-07-24 N4525B OCN → OCN Jul 24, 02:50 UTCJul 24, 03:40 UTC50m
2026-07-24 N4525B - Jul 24, 01:35 UTCJul 24, 01:40 UTC5m
2026-07-24 N4525B OCN → OCN Jul 24, 01:25 UTCJul 24, 01:30 UTC5m
2026-07-18 N4525B OCN → OCN Jul 18, 20:00 UTCJul 18, 20:45 UTC45m
2026-07-17 N4525B SMO → OCN Jul 17, 04:54 UTCJul 17, 05:45 UTC50m
2026-07-17 N4525B OCN → SMO Jul 17, 03:20 UTCJul 17, 04:10 UTC50m
2026-07-16 N4525B OCN → OCN Jul 16, 17:49 UTCJul 16, 17:54 UTC5m
2026-07-15 N4525B OCN → OCN Jul 15, 21:50 UTCJul 15, 22:20 UTC30m
2026-07-13 N4525B - Jul 13, 19:20 UTCJul 13, 20:30 UTC1h 10m
2026-07-13 N4525B - Jul 13, 15:55 UTCJul 13, 16:50 UTC55m
2026-07-12 N4525B OCN → OCN Jul 12, 16:55 UTCJul 12, 17:45 UTC50m
2026-07-11 N4525B OCN → OCN Jul 11, 22:01 UTCJul 11, 22:50 UTC50m
2026-07-11 N4525B - Jul 11, 16:30 UTCJul 11, 17:20 UTC50m
2026-07-09 N4525B - Jul 9, 15:25 UTCJul 9, 16:05 UTC40m
2026-07-05 N4525B OCN → OCN Jul 5, 23:55 UTCJul 6, 00:05 UTC10m
2026-07-05 N4525B OCN → OCN Jul 5, 23:30 UTCJul 5, 23:50 UTC20m
2026-07-05 N4525B - Jul 5, 21:35 UTCJul 5, 21:40 UTC5m
2026-07-05 N4525B OCN → OCN Jul 5, 20:40 UTCJul 5, 21:10 UTC30m
2026-07-01 N4525B OCN → OCN Jul 1, 15:45 UTCJul 1, 17:00 UTC1h 15m
2026-06-30 N4525B OCN → OCN Jun 30, 21:45 UTCJun 30, 22:35 UTC50m
2026-06-29 N4525B - Jun 29, 02:20 UTCJun 29, 02:25 UTC5m
2026-06-29 N4525B OCN → OCN Jun 29, 01:34 UTCJun 29, 01:44 UTC10m
2026-06-28 N4525B - Jun 28, 22:15 UTCJun 28, 23:29 UTC1h 15m
2026-06-28 N4525B OCN → AVX Jun 28, 19:55 UTCJun 28, 21:14 UTC1h 20m
2026-06-27 N4525B OCN → OCN Jun 27, 23:14 UTCJun 27, 23:29 UTC15m
2026-06-27 N4525B HMT → OCN Jun 27, 17:49 UTCJun 27, 18:15 UTC25m
2026-06-27 N4525B OCN → HMT Jun 27, 15:45 UTCJun 27, 16:10 UTC25m
2026-06-27 N4525B - Jun 27, 01:44 UTCJun 27, 02:04 UTC20m
2026-06-27 N4525B OCN → MYF Jun 27, 00:10 UTCJun 27, 00:34 UTC25m
2026-06-26 N4525B HMT → OCN Jun 26, 20:00 UTCJun 26, 20:59 UTC1h 0m
2026-06-26 N4525B OCN → HMT Jun 26, 17:54 UTCJun 26, 18:20 UTC25m
2026-06-25 N4525B OCN → OCN Jun 25, 18:50 UTCJun 25, 19:34 UTC45m
2026-06-22 N4525B OCN → OCN Jun 22, 22:40 UTCJun 22, 23:39 UTC1h 0m
2026-06-22 N4525B OCN → OCN Jun 22, 21:00 UTCJun 22, 21:40 UTC40m
2026-06-21 N4525B - Jun 21, 20:59 UTCJun 21, 21:10 UTC10m
2026-06-21 N4525B - Jun 21, 19:55 UTCJun 21, 20:29 UTC35m
2026-06-20 N4525B OCN → OCN Jun 20, 22:10 UTCJun 20, 22:54 UTC45m
2026-06-20 N4525B MYF → OCN Jun 20, 02:54 UTCJun 20, 03:19 UTC25m
2026-06-19 N4525B OCN → MYF Jun 19, 23:54 UTCJun 20, 01:14 UTC1h 20m
2026-06-19 N4525B OCN → OCN Jun 19, 00:24 UTCJun 19, 00:34 UTC10m
2026-06-18 N4525B OCN → OCN Jun 18, 23:40 UTCJun 19, 00:20 UTC39m
2026-06-18 N4525B OCN → OCN Jun 18, 21:45 UTCJun 18, 22:20 UTC35m
2026-06-18 N4525B OCN → OCN Jun 18, 16:25 UTCJun 18, 17:10 UTC45m
2026-06-17 N4525B OCN → OCN Jun 17, 21:15 UTCJun 17, 22:10 UTC55m
2026-06-17 N4525B OCN → OCN Jun 17, 19:05 UTCJun 17, 20:10 UTC1h 5m
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

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 9d 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.