Apparatus

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sensors Mode-S transponder

AAA39B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N785FE · CESSNA 208 Caravan · operated by FEDERAL EXPRESS CORP

Hex
AAA39B
Octal
52521633
Decimal
11,183,003
Country
US
Tail
N785FE
Type
C208
No current signal · last broadcast 7h ago
Flights observed
134
Distinct callsigns
16
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S AAA39B.

Country allocation

The ICAO 24-bit address AAA39B 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 16 distinct

Callsign Airline Flights Last seen
CPT785 - 51 2026-07-17
CPT8720 - 18 2026-07-15
CPT7717 - 15 2026-07-17
CPT8717 - 14 2026-07-17
CPT8672 - 9 2026-07-16
CPT7672 - 6 2026-07-10
CPT7668 - 5 2026-06-22
CPT8653 - 4 2026-06-10
CPT7728 - 3 2026-06-11
CPT8714 - 2 2026-06-29
CPT8668 - 2 2026-06-19
CPT8700 - 1 2026-04-13
CPT8666 - 1 2026-06-05
CPT7714 - 1 2026-04-22
CPT2319 - 1 2026-04-13
CPT100 - 1 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CPT7717 - Jul 17, 22:40 UTCJul 17, 23:00 UTC20m
2026-07-17 CPT8717 - Jul 17, 21:34 UTCJul 17, 21:55 UTC20m
2026-07-17 CPT785 - Jul 17, 17:20 UTCJul 17, 17:50 UTC30m
2026-07-17 CPT785 - Jul 17, 16:24 UTCJul 17, 16:49 UTC25m
2026-07-16 CPT785 - Jul 16, 23:55 UTCJul 17, 00:04 UTC10m
2026-07-16 CPT8672 - Jul 16, 21:40 UTCJul 16, 21:55 UTC15m
2026-07-15 CPT7717 - Jul 15, 23:40 UTCJul 16, 00:00 UTC20m
2026-07-15 CPT8717 - Jul 15, 22:25 UTCJul 15, 22:40 UTC15m
2026-07-15 CPT8720 - Jul 15, 19:05 UTCJul 15, 19:25 UTC20m
2026-07-15 CPT8720 - Jul 15, 17:30 UTCJul 15, 17:50 UTC20m
2026-07-14 CPT7717 - Jul 14, 23:20 UTCJul 14, 23:40 UTC20m
2026-07-14 CPT8717 - Jul 14, 21:50 UTCJul 14, 22:15 UTC25m
2026-07-13 CPT785 - Jul 13, 22:05 UTCJul 13, 22:20 UTC15m
2026-07-10 CPT8672 - Jul 10, 21:55 UTCJul 10, 22:05 UTC10m
2026-07-10 CPT7672 - Jul 10, 00:30 UTCJul 10, 00:40 UTC10m
2026-07-09 CPT8672 - Jul 9, 21:40 UTCJul 9, 21:55 UTC15m
2026-07-03 CPT785 - Jul 3, 23:55 UTCJul 4, 00:05 UTC10m
2026-07-03 CPT8672 - Jul 3, 21:55 UTCJul 3, 22:10 UTC15m
2026-07-02 CPT785 - Jul 2, 22:20 UTCJul 2, 23:40 UTC1h 20m
2026-07-01 CPT785 - Jul 1, 22:10 UTCJul 1, 23:30 UTC1h 20m
2026-06-29 CPT785 - Jun 29, 22:55 UTCJun 29, 23:25 UTC30m
2026-06-29 CPT8714 - Jun 29, 21:39 UTCJun 29, 22:10 UTC30m
2026-06-23 CPT785 - Jun 23, 18:55 UTCJun 23, 19:04 UTC10m
2026-06-23 CPT785 - Jun 23, 17:20 UTCJun 23, 17:34 UTC15m
2026-06-22 CPT7668 - Jun 22, 23:24 UTCJun 23, 00:00 UTC35m
2026-06-22 CPT785 - Jun 22, 21:05 UTCJun 22, 21:35 UTC30m
2026-06-22 CPT785 - Jun 22, 19:14 UTCJun 22, 19:34 UTC20m
2026-06-22 CPT785 - Jun 22, 17:20 UTCJun 22, 17:40 UTC20m
2026-06-19 CPT7668 - Jun 19, 23:04 UTCJun 19, 23:39 UTC35m
2026-06-19 CPT8668 - Jun 19, 21:44 UTCJun 19, 22:14 UTC30m
2026-06-19 CPT785 - Jun 19, 18:14 UTCJun 19, 18:34 UTC20m
2026-06-19 CPT785 - Jun 19, 16:44 UTCJun 19, 17:04 UTC20m
2026-06-18 CPT7668 JHM → HNL Jun 18, 23:15 UTCJun 18, 23:50 UTC35m
2026-06-18 CPT8668 - Jun 18, 21:35 UTCJun 18, 22:00 UTC25m
2026-06-18 CPT785 - Jun 18, 18:15 UTCJun 18, 18:35 UTC20m
2026-06-18 CPT785 - Jun 18, 16:45 UTCJun 18, 17:05 UTC20m
2026-06-17 CPT7717 - Jun 17, 23:40 UTCJun 18, 00:00 UTC20m
2026-06-17 CPT8717 - Jun 17, 22:05 UTCJun 17, 22:30 UTC25m
2026-06-15 CPT785 - Jun 15, 22:25 UTCJun 15, 22:45 UTC20m
2026-06-11 CPT7728 KOA → HNL Jun 11, 00:15 UTCJun 11, 01:15 UTC1h 0m
2026-06-10 CPT8653 - Jun 10, 21:55 UTCJun 10, 22:55 UTC1h 0m
2026-06-10 CPT785 - Jun 10, 18:45 UTCJun 10, 18:55 UTC10m
2026-06-10 CPT785 - Jun 10, 16:25 UTCJun 10, 16:40 UTC15m
2026-06-09 CPT7717 - Jun 9, 23:00 UTCJun 9, 23:20 UTC20m
2026-06-09 CPT8717 - Jun 9, 21:50 UTCJun 9, 22:10 UTC20m
2026-06-09 CPT785 - Jun 9, 18:25 UTCJun 9, 18:50 UTC25m
2026-06-09 CPT785 - Jun 9, 17:05 UTCJun 9, 17:30 UTC25m
2026-06-08 CPT7668 JHM → HNL Jun 8, 23:20 UTCJun 8, 23:55 UTC35m
2026-06-08 CPT785 - Jun 8, 21:15 UTCJun 8, 21:55 UTC40m
2026-06-08 CPT785 - Jun 8, 19:15 UTCJun 8, 19:30 UTC15m

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 N785FE page for operator, model, and routing details .

Mode-S AAA39B frequently asked

What is Mode-S code AAA39B?
AAA39B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N785FE.
Where is Mode-S AAA39B registered?
Mode-S code AAA39B 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 AAA39B broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAA39B, octal 52521633, decimal 11,183,003.
What flights does AAA39B operate?
Mode-S AAA39B has broadcast 16 distinct callsigns, including CPT785, CPT8720, CPT7717, CPT8717, CPT8672.