Apparatus

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sensors Mode-S transponder

A437C2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N371CP · CESSNA TR182 Turbo Skylane RG · operated by CIVIL AIR PATROL

Hex
A437C2
Octal
51033702
Decimal
10,762,178
Country
US
Tail
N371CP
Type
C82T
No current signal · last broadcast Jul 26, 17:05 UTC
Flights observed
90
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 17:05 UTC

Last known position

Most recent position reported by Mode-S A437C2.

Country allocation

The ICAO 24-bit address A437C2 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
CAP4171 - 90 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAP4171 - Jul 26, 16:05 UTCJul 26, 17:05 UTC1h 0m
2026-07-25 CAP4171 - Jul 25, 21:40 UTCJul 25, 22:15 UTC35m
2026-07-25 CAP4171 - Jul 25, 18:05 UTCJul 25, 20:35 UTC2h 30m
2026-07-25 CAP4171 - Jul 25, 16:45 UTCJul 25, 16:55 UTC10m
2026-07-24 CAP4171 DHN → MCF Jul 24, 18:40 UTCJul 24, 21:10 UTC2h 30m
2026-07-24 CAP4171 - Jul 24, 14:20 UTCJul 24, 16:50 UTC2h 30m
2026-07-24 CAP4171 - Jul 24, 01:20 UTCJul 24, 01:30 UTC10m
2026-07-23 CAP4171 - Jul 23, 22:45 UTCJul 23, 22:55 UTC10m
2026-07-23 CAP4171 - Jul 23, 21:25 UTCJul 23, 21:45 UTC20m
2026-07-23 CAP4171 - Jul 23, 20:40 UTCJul 23, 20:55 UTC15m
2026-07-21 CAP4171 - Jul 21, 17:10 UTCJul 21, 18:15 UTC1h 5m
2026-07-21 CAP4171 - Jul 21, 15:50 UTCJul 21, 16:35 UTC45m
2026-07-21 CAP4171 - Jul 21, 02:20 UTCJul 21, 02:55 UTC35m
2026-07-20 CAP4171 - Jul 20, 15:15 UTCJul 20, 16:05 UTC50m
2026-07-19 CAP4171 - Jul 19, 21:25 UTCJul 19, 22:00 UTC35m
2026-07-19 CAP4171 - Jul 19, 19:55 UTCJul 19, 20:05 UTC10m
2026-07-19 CAP4171 - Jul 19, 15:50 UTCJul 19, 16:15 UTC25m
2026-07-19 CAP4171 - Jul 19, 13:30 UTCJul 19, 13:40 UTC10m
2026-07-16 CAP4171 - Jul 16, 22:59 UTCJul 16, 23:10 UTC10m
2026-07-16 CAP4171 - Jul 16, 22:00 UTCJul 16, 22:10 UTC10m
2026-07-16 CAP4171 - Jul 16, 20:39 UTCJul 16, 20:55 UTC15m
2026-07-16 CAP4171 - Jul 16, 19:45 UTCJul 16, 20:05 UTC20m
2026-07-16 CAP4171 - Jul 16, 18:15 UTCJul 16, 18:40 UTC25m
2026-07-16 CAP4171 - Jul 16, 17:20 UTCJul 16, 17:35 UTC15m
2026-07-14 CAP4171 - Jul 14, 21:30 UTCJul 14, 21:45 UTC15m
2026-07-04 CAP4171 - Jul 4, 13:50 UTCJul 4, 16:00 UTC2h 10m
2026-07-03 CAP4171 - Jul 3, 14:30 UTCJul 3, 14:40 UTC10m
2026-07-03 CAP4171 - Jul 3, 11:45 UTCJul 3, 12:00 UTC15m
2026-06-30 CAP4171 - Jun 30, 23:30 UTCJul 1, 01:10 UTC1h 40m
2026-06-30 CAP4171 - Jun 30, 17:50 UTCJun 30, 18:05 UTC15m
2026-06-30 CAP4171 - Jun 30, 16:00 UTCJun 30, 16:15 UTC15m
2026-06-29 CAP4171 - Jun 29, 13:39 UTCJun 29, 13:54 UTC15m
2026-06-28 CAP4171 - Jun 28, 22:15 UTCJun 28, 23:14 UTC1h 0m
2026-06-28 CAP4171 - Jun 28, 20:29 UTCJun 28, 20:59 UTC30m
2026-06-28 CAP4171 - Jun 28, 15:49 UTCJun 28, 17:25 UTC1h 35m
2026-06-27 CAP4171 - Jun 27, 14:00 UTCJun 27, 15:10 UTC1h 10m
2026-06-26 CAP4171 - Jun 26, 14:35 UTCJun 26, 15:20 UTC45m
2026-06-26 CAP4171 - Jun 26, 00:55 UTCJun 26, 01:20 UTC25m
2026-06-25 CAP4171 - Jun 25, 22:24 UTCJun 25, 22:49 UTC25m
2026-06-24 CAP4171 - Jun 24, 16:05 UTCJun 24, 16:34 UTC30m
2026-05-31 CAP4171 - May 31, 14:15 UTCMay 31, 15:15 UTC1h 0m
2026-05-29 CAP4171 - May 29, 00:45 UTCMay 29, 01:05 UTC20m
2026-05-28 CAP4171 - May 28, 22:30 UTCMay 28, 23:40 UTC1h 10m
2026-05-28 CAP4171 - May 28, 20:30 UTCMay 28, 20:40 UTC10m
2026-05-17 CAP4171 - May 17, 19:40 UTCMay 17, 20:35 UTC55m
2026-05-17 CAP4171 - May 17, 16:30 UTCMay 17, 17:45 UTC1h 15m
2026-05-17 CAP4171 - May 17, 13:25 UTCMay 17, 14:35 UTC1h 10m
2026-05-16 CAP4171 - May 16, 13:51 UTCMay 16, 15:31 UTC1h 40m
2026-05-15 CAP4171 - May 15, 15:20 UTCMay 15, 16:20 UTC1h 0m
2026-05-14 CAP4171 - May 14, 19:40 UTCMay 14, 20:20 UTC40m

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 N371CP page for operator, model, and routing details .

Mode-S A437C2 frequently asked

What is Mode-S code A437C2?
A437C2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N371CP.
Where is Mode-S A437C2 registered?
Mode-S code A437C2 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 A437C2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A437C2, octal 51033702, decimal 10,762,178.
What flights does A437C2 operate?
Mode-S A437C2 has broadcast 1 distinct callsign, including CAP4171.