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sensors Mode-S transponder

A0E474

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N157CT · operated by CENTRAL TEXAS COLLEGE AVIATION SCIENCE DEPT

Hex
A0E474
Octal
50162164
Decimal
10,544,244
Country
US
Tail
N157CT
Type
OSCR
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 A0E474.

Country allocation

The ICAO 24-bit address A0E474 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
N157CT - 94 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N157CT - Jul 26, 20:15 UTCJul 26, 20:45 UTC30m
2026-07-26 N157CT - Jul 26, 18:20 UTCJul 26, 18:45 UTC25m
2026-07-25 N157CT - Jul 25, 21:15 UTCJul 25, 21:30 UTC15m
2026-07-25 N157CT - Jul 25, 18:10 UTCJul 25, 18:45 UTC35m
2026-07-25 N157CT - Jul 25, 16:35 UTCJul 25, 17:10 UTC35m
2026-07-25 N157CT - Jul 25, 14:10 UTCJul 25, 14:40 UTC30m
2026-07-24 N157CT - Jul 24, 22:45 UTCJul 24, 23:05 UTC20m
2026-07-24 N157CT - Jul 24, 19:05 UTCJul 24, 19:30 UTC25m
2026-07-23 N157CT - Jul 23, 21:35 UTCJul 23, 22:25 UTC50m
2026-07-23 N157CT - Jul 23, 18:30 UTCJul 23, 20:20 UTC1h 50m
2026-07-23 N157CT - Jul 23, 14:10 UTCJul 23, 14:40 UTC30m
2026-07-22 N157CT - Jul 22, 16:20 UTCJul 22, 17:00 UTC40m
2026-07-21 N157CT - Jul 21, 20:15 UTCJul 21, 22:20 UTC2h 5m
2026-07-21 N157CT - Jul 21, 16:55 UTCJul 21, 17:05 UTC10m
2026-07-20 N157CT - Jul 20, 15:40 UTCJul 20, 15:50 UTC10m
2026-07-20 N157CT - Jul 20, 13:55 UTCJul 20, 14:30 UTC35m
2026-07-19 N157CT - Jul 19, 17:20 UTCJul 19, 18:00 UTC40m
2026-07-19 N157CT - Jul 19, 14:35 UTCJul 19, 15:15 UTC40m
2026-07-17 N157CT - Jul 17, 19:09 UTCJul 17, 19:25 UTC15m
2026-07-17 N157CT - Jul 17, 15:20 UTCJul 17, 16:04 UTC45m
2026-07-10 N157CT - Jul 10, 18:55 UTCJul 10, 19:15 UTC20m
2026-07-09 N157CT - Jul 9, 18:55 UTCJul 9, 21:45 UTC2h 50m
2026-07-09 N157CT - Jul 9, 02:35 UTCJul 9, 04:15 UTC1h 40m
2026-07-08 N157CT - Jul 8, 19:40 UTCJul 8, 21:50 UTC2h 10m
2026-07-07 N157CT - Jul 7, 15:45 UTCJul 7, 16:30 UTC45m
2026-07-05 N157CT - Jul 5, 22:00 UTCJul 5, 22:40 UTC40m
2026-07-05 N157CT - Jul 5, 19:55 UTCJul 5, 21:20 UTC1h 25m
2026-07-05 N157CT - Jul 5, 18:35 UTCJul 5, 19:00 UTC25m
2026-07-05 N157CT - Jul 5, 15:20 UTCJul 5, 16:00 UTC40m
2026-07-02 N157CT - Jul 2, 15:05 UTCJul 2, 16:35 UTC1h 30m
2026-07-02 N157CT - Jul 2, 13:55 UTCJul 2, 14:15 UTC20m
2026-06-30 N157CT - Jun 30, 18:50 UTCJun 30, 19:40 UTC50m
2026-06-30 N157CT - Jun 30, 14:10 UTCJun 30, 14:20 UTC10m
2026-06-29 N157CT - Jun 29, 16:00 UTCJun 29, 16:35 UTC35m
2026-06-28 N157CT - Jun 28, 03:19 UTCJun 28, 05:20 UTC2h 0m
2026-06-27 N157CT - Jun 27, 22:15 UTCJun 27, 22:49 UTC35m
2026-06-27 N157CT - Jun 27, 14:29 UTCJun 27, 15:00 UTC30m
2026-06-25 N157CT - Jun 25, 18:59 UTCJun 25, 19:09 UTC10m
2026-06-25 N157CT - Jun 25, 16:24 UTCJun 25, 17:09 UTC45m
2026-06-24 N157CT - Jun 24, 22:00 UTCJun 24, 22:39 UTC40m
2026-06-24 N157CT - Jun 24, 19:04 UTCJun 24, 20:54 UTC1h 50m
2026-06-23 N157CT - Jun 23, 21:14 UTCJun 23, 23:24 UTC2h 10m
2026-06-23 N157CT - Jun 23, 18:55 UTCJun 23, 19:19 UTC25m
2026-06-23 N157CT - Jun 23, 15:40 UTCJun 23, 16:24 UTC45m
2026-06-18 N157CT - Jun 18, 00:20 UTCJun 18, 00:45 UTC25m
2026-06-17 N157CT - Jun 17, 19:05 UTCJun 17, 19:20 UTC15m
2026-06-11 N157CT - Jun 11, 18:20 UTCJun 11, 19:25 UTC1h 5m
2026-06-10 N157CT - Jun 10, 23:15 UTCJun 11, 00:00 UTC45m
2026-06-09 N157CT - Jun 9, 20:55 UTCJun 9, 21:30 UTC35m
2026-06-03 N157CT - Jun 3, 15:20 UTCJun 3, 16:05 UTC45m

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 N157CT page for operator, model, and routing details .

Mode-S A0E474 frequently asked

What is Mode-S code A0E474?
A0E474 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N157CT.
Where is Mode-S A0E474 registered?
Mode-S code A0E474 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 A0E474 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 A0E474, octal 50162164, decimal 10,544,244.
What flights does A0E474 operate?
Mode-S A0E474 has broadcast 1 distinct callsign, including N157CT.