Apparatus

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sensors Mode-S transponder

A23A27

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N24223 · operated by CAREER TRACK 1 LLC

Hex
A23A27
Octal
50435047
Decimal
10,631,719
Country
US
Tail
N24223
Type
C172
No current signal · last broadcast 14h ago
Flights observed
72
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A23A27.

Country allocation

The ICAO 24-bit address A23A27 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
CXK455 - 72 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CXK455 - Jun 2, 14:45 UTCJun 2, 16:10 UTC1h 25m
2026-06-02 CXK455 - Jun 2, 12:55 UTCJun 2, 13:40 UTC45m
2026-06-01 CXK455 - Jun 1, 11:15 UTCJun 1, 11:50 UTC35m
2026-05-31 CXK455 APA → APA May 31, 14:00 UTCMay 31, 15:15 UTC1h 15m
2026-05-30 CXK455 COS → APA May 30, 14:55 UTCMay 30, 15:25 UTC30m
2026-05-29 CXK455 COS → COS May 29, 15:00 UTCMay 29, 17:50 UTC2h 50m
2026-05-28 CXK455 COS → COS May 28, 16:35 UTCMay 28, 18:50 UTC2h 15m
2026-05-27 CXK455 COS → COS May 27, 19:45 UTCMay 27, 21:25 UTC1h 40m
2026-05-26 CXK455 COS → COS May 26, 16:05 UTCMay 26, 18:50 UTC2h 45m
2026-05-26 CXK455 COS → COS May 26, 14:35 UTCMay 26, 14:50 UTC15m
2026-05-26 CXK455 - May 26, 14:14 UTCMay 26, 14:24 UTC10m
2026-05-24 CXK455 - May 24, 04:05 UTCMay 24, 04:50 UTC45m
2026-05-24 CXK455 - May 24, 00:25 UTCMay 24, 01:25 UTC1h 0m
2026-05-23 CXK455 COS → COS May 23, 16:30 UTCMay 23, 17:55 UTC1h 25m
2026-05-20 CXK455 COS → COS May 20, 19:15 UTCMay 20, 20:20 UTC1h 5m
2026-05-16 CXK455 COS → COS May 16, 11:25 UTCMay 16, 13:21 UTC1h 55m
2026-05-15 CXK455 - May 15, 13:20 UTCMay 15, 13:25 UTC5m
2026-05-15 CXK455 - May 15, 13:05 UTCMay 15, 13:10 UTC5m
2026-05-15 CXK455 COS → COS May 15, 12:35 UTCMay 15, 12:45 UTC10m
2026-05-15 CXK455 COS → COS May 15, 12:10 UTCMay 15, 12:20 UTC10m
2026-05-15 CXK455 - May 15, 11:40 UTCMay 15, 11:50 UTC10m
2026-05-15 CXK455 COS → COS May 15, 11:25 UTCMay 15, 11:30 UTC5m
2026-05-13 CXK455 COS → COS May 13, 17:10 UTCMay 13, 19:15 UTC2h 5m
2026-05-13 CXK455 COS → COS May 13, 14:10 UTCMay 13, 15:50 UTC1h 40m
2026-05-13 CXK455 COS → COS May 13, 11:10 UTCMay 13, 12:50 UTC1h 40m
2026-05-11 CXK455 - May 11, 21:05 UTCMay 11, 22:05 UTC1h 0m
2026-05-11 CXK455 - May 11, 14:20 UTCMay 11, 15:15 UTC55m
2026-05-11 CXK455 COS → COS May 11, 11:45 UTCMay 11, 12:55 UTC1h 10m
2026-05-10 CXK455 - May 10, 16:50 UTCMay 10, 17:59 UTC1h 10m
2026-05-10 CXK455 COS → COS May 10, 16:20 UTCMay 10, 16:30 UTC10m
2026-05-10 CXK455 COS → COS May 10, 16:04 UTCMay 10, 16:14 UTC10m
2026-05-09 CXK455 COS → COS May 9, 16:50 UTCMay 9, 18:55 UTC2h 5m
2026-05-09 CXK455 COS → COS May 9, 14:30 UTCMay 9, 15:45 UTC1h 15m
2026-05-09 CXK455 COS → COS May 9, 14:05 UTCMay 9, 14:15 UTC10m
2026-05-09 CXK455 COS → COS May 9, 12:50 UTCMay 9, 13:00 UTC10m
2026-05-09 CXK455 - May 9, 12:25 UTCMay 9, 12:30 UTC5m
2026-05-09 CXK455 COS → COS May 9, 12:10 UTCMay 9, 12:20 UTC10m
2026-05-09 CXK455 - May 9, 11:55 UTCMay 9, 12:05 UTC10m
2026-05-09 CXK455 COS → COS May 9, 11:40 UTCMay 9, 11:45 UTC5m
2026-05-08 CXK455 COS → COS May 8, 14:00 UTCMay 8, 15:00 UTC1h 0m
2026-05-01 CXK455 COS → COS May 1, 19:20 UTCMay 1, 19:45 UTC25m
2026-05-01 CXK455 COS → COS May 1, 15:10 UTCMay 1, 16:25 UTC1h 15m
2026-04-27 CXK455 COS → COS Apr 27, 17:30 UTCApr 27, 18:50 UTC1h 20m
2026-04-25 CXK455 COS → COS Apr 25, 17:05 UTCApr 25, 18:30 UTC1h 25m
2026-04-25 CXK455 COS → COS Apr 25, 15:35 UTCApr 25, 16:00 UTC25m
2026-04-25 CXK455 - Apr 25, 15:20 UTCApr 25, 15:30 UTC10m
2026-04-25 CXK455 - Apr 25, 15:00 UTCApr 25, 15:05 UTC5m
2026-04-25 CXK455 COS → COS Apr 25, 14:45 UTCApr 25, 14:50 UTC5m
2026-04-24 CXK455 COS → COS Apr 24, 15:35 UTCApr 24, 16:50 UTC1h 15m
2026-04-23 CXK455 COS → COS Apr 23, 12:01 UTCApr 23, 12:20 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 N24223 page for operator, model, and routing details .

Mode-S A23A27 frequently asked

What is Mode-S code A23A27?
A23A27 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N24223.
Where is Mode-S A23A27 registered?
Mode-S code A23A27 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 A23A27 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A23A27, octal 50435047, decimal 10,631,719.
What flights does A23A27 operate?
Mode-S A23A27 has broadcast 1 distinct callsign, including CXK455.