Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A53D5F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N437CP · CESSNA T206 Turbo Stationair · operated by CIVIL AIR PATROL

Hex
A53D5F
Octal
51236537
Decimal
10,829,151
Country
US
Tail
N437CP
Type
T206
No current signal · last broadcast 2d ago
Flights observed
61
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A53D5F.

Country allocation

The ICAO 24-bit address A53D5F 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
CAP437 - 61 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CAP437 WHP → WHP Jul 16, 01:15 UTCJul 16, 03:40 UTC2h 25m
2026-07-14 CAP437 WHP → WHP Jul 14, 18:45 UTCJul 14, 19:00 UTC15m
2026-07-14 CAP437 - Jul 14, 18:30 UTCJul 14, 18:35 UTC5m
2026-07-14 CAP437 - Jul 14, 17:35 UTCJul 14, 18:25 UTC50m
2026-07-13 CAP437 RAL → WHP Jul 13, 00:20 UTCJul 13, 00:50 UTC30m
2026-07-12 CAP437 RAL → RAL Jul 12, 21:35 UTCJul 12, 23:00 UTC1h 25m
2026-07-12 CAP437 - Jul 12, 17:50 UTCJul 12, 18:30 UTC40m
2026-07-12 CAP437 - Jul 12, 16:50 UTCJul 12, 17:10 UTC20m
2026-07-11 CAP437 RAL → RAL Jul 11, 21:45 UTCJul 11, 22:50 UTC1h 5m
2026-07-11 CAP437 RAL → RAL Jul 11, 18:50 UTCJul 11, 19:00 UTC10m
2026-07-11 CAP437 RAL → RAL Jul 11, 17:35 UTCJul 11, 18:40 UTC1h 5m
2026-07-11 CAP437 WHP → RAL Jul 11, 14:40 UTCJul 11, 15:15 UTC35m
2026-07-11 CAP437 WHP → WHP Jul 11, 03:25 UTCJul 11, 03:30 UTC5m
2026-07-11 CAP437 - Jul 11, 03:10 UTCJul 11, 03:20 UTC10m
2026-07-11 CAP437 WHP → WHP Jul 11, 01:35 UTCJul 11, 02:55 UTC1h 20m
2026-07-10 CAP437 WHP → WHP Jul 10, 21:45 UTCJul 10, 22:45 UTC1h 0m
2026-07-10 CAP437 WHP → WHP Jul 10, 19:35 UTCJul 10, 19:45 UTC10m
2026-07-10 CAP437 WHP → WHP Jul 10, 18:35 UTCJul 10, 19:25 UTC50m
2026-07-01 CAP437 - Jul 1, 04:45 UTCJul 1, 05:00 UTC15m
2026-07-01 CAP437 WHP → VNY Jul 1, 02:15 UTCJul 1, 04:40 UTC2h 25m
2026-06-29 CAP437 - Jun 29, 02:20 UTCJun 29, 02:35 UTC15m
2026-06-29 CAP437 - Jun 29, 01:34 UTCJun 29, 02:00 UTC25m
2026-06-28 CAP437 - Jun 28, 23:39 UTCJun 29, 00:20 UTC40m
2026-06-28 CAP437 - Jun 28, 22:24 UTCJun 28, 22:55 UTC30m
2026-06-28 CAP437 - Jun 28, 19:59 UTCJun 28, 21:20 UTC1h 20m
2026-06-28 CAP437 - Jun 28, 18:49 UTCJun 28, 19:04 UTC15m
2026-06-28 CAP437 SMO → EMT Jun 28, 17:44 UTCJun 28, 18:05 UTC20m
2026-06-28 CAP437 WHP → SMO Jun 28, 16:55 UTCJun 28, 17:04 UTC10m
2026-06-27 CAP437 - Jun 27, 01:35 UTCJun 27, 02:39 UTC1h 5m
2026-06-26 CAP437 - Jun 26, 22:05 UTCJun 26, 22:55 UTC50m
2026-06-26 CAP437 - Jun 26, 19:35 UTCJun 26, 20:59 UTC1h 25m
2026-06-26 CAP437 - Jun 26, 00:45 UTCJun 26, 01:05 UTC20m
2026-06-25 CAP437 - Jun 25, 23:14 UTCJun 25, 23:44 UTC30m
2026-06-25 CAP437 - Jun 25, 21:25 UTCJun 25, 21:44 UTC20m
2026-06-25 CAP437 - Jun 25, 20:30 UTCJun 25, 20:45 UTC15m
2026-06-25 CAP437 - Jun 25, 18:24 UTCJun 25, 18:34 UTC10m
2026-06-25 CAP437 - Jun 25, 17:20 UTCJun 25, 17:44 UTC25m
2026-06-24 CAP437 - Jun 24, 22:10 UTCJun 24, 23:34 UTC1h 25m
2026-06-15 CAP437 WHP → WHP Jun 15, 22:00 UTCJun 16, 00:10 UTC2h 10m
2026-06-13 CAP437 - Jun 13, 03:45 UTCJun 13, 03:50 UTC5m
2026-06-13 CAP437 WHP → WHP Jun 13, 01:55 UTCJun 13, 03:40 UTC1h 45m
2026-06-12 CAP437 WHP → WHP Jun 12, 23:00 UTCJun 13, 00:30 UTC1h 30m
2026-06-08 CAP437 - Jun 8, 22:10 UTCJun 9, 00:25 UTC2h 15m
2026-06-08 CAP437 - Jun 8, 18:35 UTCJun 8, 19:40 UTC1h 5m
2026-06-08 CAP437 WHP → WHP Jun 8, 18:10 UTCJun 8, 18:30 UTC20m
2026-06-07 CAP437 WHP → WHP Jun 7, 01:04 UTCJun 7, 01:50 UTC45m
2026-06-06 CAP437 - Jun 6, 22:10 UTCJun 6, 22:55 UTC45m
2026-06-06 CAP437 - Jun 6, 21:00 UTCJun 6, 21:40 UTC40m
2026-06-06 CAP437 - Jun 6, 18:25 UTCJun 6, 18:39 UTC15m
2026-06-05 CAP437 - Jun 5, 02:25 UTCJun 5, 03:00 UTC35m

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 N437CP page for operator, model, and routing details .

Mode-S A53D5F frequently asked

What is Mode-S code A53D5F?
A53D5F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N437CP.
Where is Mode-S A53D5F registered?
Mode-S code A53D5F 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 A53D5F broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A53D5F, octal 51236537, decimal 10,829,151.
What flights does A53D5F operate?
Mode-S A53D5F has broadcast 1 distinct callsign, including CAP437.