Apparatus

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sensors Mode-S transponder

A143E2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1806M · operated by CAREER TRACK 2 LLC

Hex
A143E2
Octal
50241742
Decimal
10,568,674
Country
US
Tail
N1806M
Type
C172
Broadcasting now · callsign CXK699 · 5,800 ft
Flights observed
206
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 13:00 UTC

Current position

A143E2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A143E2 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
CXK699 - 206 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CXK699 BJC → BJC Jul 26, 11:35 UTCJul 26, 12:55 UTC1h 20m
2026-07-25 CXK699 COS → BJC Jul 25, 16:25 UTCJul 25, 17:50 UTC1h 25m
2026-07-25 CXK699 BJC → COS Jul 25, 14:40 UTCJul 25, 15:30 UTC50m
2026-07-25 CXK699 BJC → BJC Jul 25, 11:20 UTCJul 25, 11:50 UTC30m
2026-07-25 CXK699 - Jul 25, 05:15 UTCJul 25, 05:25 UTC10m
2026-07-25 CXK699 BJC → BJC Jul 25, 05:00 UTCJul 25, 05:10 UTC10m
2026-07-25 CXK699 BJC → BJC Jul 25, 04:50 UTCJul 25, 04:55 UTC5m
2026-07-24 CXK699 APA → BJC Jul 24, 19:05 UTCJul 24, 19:25 UTC20m
2026-07-24 CXK699 COS → APA Jul 24, 16:20 UTCJul 24, 17:00 UTC40m
2026-07-24 CXK699 - Jul 24, 14:25 UTCJul 24, 15:55 UTC1h 30m
2026-07-20 CXK699 - Jul 20, 20:30 UTCJul 20, 22:00 UTC1h 30m
2026-07-20 CXK699 APA → APA Jul 20, 17:30 UTCJul 20, 18:20 UTC50m
2026-07-20 CXK699 APA → APA Jul 20, 11:20 UTCJul 20, 13:00 UTC1h 40m
2026-07-19 CXK699 - Jul 19, 17:30 UTCJul 19, 19:30 UTC2h 0m
2026-07-19 CXK699 APA → APA Jul 19, 14:35 UTCJul 19, 15:55 UTC1h 20m
2026-07-19 CXK699 APA → APA Jul 19, 12:30 UTCJul 19, 13:30 UTC1h 0m
2026-07-18 CXK699 - Jul 18, 17:30 UTCJul 18, 19:00 UTC1h 30m
2026-07-18 CXK699 - Jul 18, 14:35 UTCJul 18, 16:45 UTC2h 10m
2026-07-18 CXK699 APA → APA Jul 18, 12:15 UTCJul 18, 13:40 UTC1h 25m
2026-07-18 CXK699 - Jul 18, 11:10 UTCJul 18, 11:35 UTC25m
2026-07-17 CXK699 - Jul 17, 14:30 UTCJul 17, 15:10 UTC40m
2026-07-17 CXK699 - Jul 17, 11:30 UTCJul 17, 13:00 UTC1h 30m
2026-07-16 CXK699 - Jul 16, 17:00 UTCJul 16, 18:10 UTC1h 10m
2026-07-10 CXK699 APA → APA Jul 10, 16:20 UTCJul 10, 17:10 UTC50m
2026-07-09 CXK699 APA → APA Jul 9, 14:20 UTCJul 9, 16:20 UTC2h 0m
2026-07-08 CXK699 APA → APA Jul 8, 14:30 UTCJul 8, 15:35 UTC1h 5m
2026-07-08 CXK699 - Jul 8, 11:05 UTCJul 8, 12:50 UTC1h 45m
2026-07-06 CXK699 COS → APA Jul 6, 14:20 UTCJul 6, 14:50 UTC30m
2026-07-06 CXK699 - Jul 6, 12:50 UTCJul 6, 14:15 UTC1h 25m
2026-07-06 CXK699 - Jul 6, 04:50 UTCJul 6, 06:05 UTC1h 15m
2026-07-06 CXK699 - Jul 6, 01:10 UTCJul 6, 02:20 UTC1h 10m
2026-07-05 CXK699 - Jul 5, 15:15 UTCJul 5, 16:30 UTC1h 15m
2026-07-04 CXK699 APA → APA Jul 4, 15:05 UTCJul 4, 17:05 UTC2h 0m
2026-07-04 CXK699 - Jul 4, 12:35 UTCJul 4, 14:05 UTC1h 30m
2026-07-03 CXK699 APA → APA Jul 3, 17:40 UTCJul 3, 18:30 UTC50m
2026-07-03 CXK699 - Jul 3, 11:25 UTCJul 3, 11:40 UTC15m
2026-07-03 CXK699 APA → APA Jul 3, 11:10 UTCJul 3, 11:20 UTC10m
2026-07-02 CXK699 - Jul 2, 19:00 UTCJul 2, 20:00 UTC1h 0m
2026-07-02 CXK699 - Jul 2, 16:35 UTCJul 2, 17:55 UTC1h 20m
2026-07-01 CXK699 BJC → APA Jul 1, 17:35 UTCJul 1, 18:35 UTC1h 0m
2026-07-01 CXK699 BJC → BJC Jul 1, 14:10 UTCJul 1, 15:40 UTC1h 30m
2026-07-01 CXK699 BJC → BJC Jul 1, 11:15 UTCJul 1, 12:35 UTC1h 20m
2026-06-30 CXK699 BJC → BJC Jun 30, 13:20 UTCJun 30, 15:30 UTC2h 10m
2026-06-30 CXK699 BJC → BJC Jun 30, 11:10 UTCJun 30, 12:10 UTC1h 0m
2026-06-29 CXK699 BJC → BJC Jun 29, 17:05 UTCJun 29, 18:10 UTC1h 5m
2026-06-29 CXK699 BJC → BJC Jun 29, 11:25 UTCJun 29, 13:34 UTC2h 10m
2026-06-28 CXK699 BJC → BJC Jun 28, 14:19 UTCJun 28, 15:49 UTC1h 30m
2026-06-28 CXK699 BJC → BJC Jun 28, 12:09 UTCJun 28, 13:10 UTC1h 0m
2026-06-27 CXK699 COS → BJC Jun 27, 06:19 UTCJun 27, 07:04 UTC45m
2026-06-27 CXK699 - Jun 27, 05:55 UTCJun 27, 06:05 UTC10m

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 N1806M page for operator, model, and routing details .

Mode-S A143E2 frequently asked

What is Mode-S code A143E2?
A143E2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1806M.
Where is Mode-S A143E2 registered?
Mode-S code A143E2 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 A143E2 broadcasting right now?
Yes. Mode-S A143E2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A143E2, octal 50241742, decimal 10,568,674.
What flights does A143E2 operate?
Mode-S A143E2 has broadcast 1 distinct callsign, including CXK699.