Apparatus

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sensors Mode-S transponder

A9ECBA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N739CP · CESSNA TR182 Turbo Skylane RG · operated by CIVIL AIR PATROL

Hex
A9ECBA
Octal
52366272
Decimal
11,136,186
Country
US
Tail
N739CP
Type
C82T
No current signal · last broadcast 8d ago
Flights observed
51
Distinct callsigns
1
Country
US
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S A9ECBA.

Country allocation

The ICAO 24-bit address A9ECBA 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
CAP4139 - 51 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAP4139 - Jul 26, 16:15 UTCJul 26, 16:25 UTC10m
2026-07-26 CAP4139 - Jul 26, 01:25 UTCJul 26, 02:45 UTC1h 20m
2026-07-26 CAP4139 - Jul 26, 00:15 UTCJul 26, 00:30 UTC15m
2026-07-25 CAP4139 - Jul 25, 21:15 UTCJul 25, 21:55 UTC40m
2026-07-25 CAP4139 - Jul 25, 19:20 UTCJul 25, 20:15 UTC55m
2026-07-25 CAP4139 - Jul 25, 17:50 UTCJul 25, 18:35 UTC45m
2026-07-25 CAP4139 - Jul 25, 16:50 UTCJul 25, 17:00 UTC10m
2026-07-24 CAP4139 DHN → MCF Jul 24, 18:35 UTCJul 24, 21:05 UTC2h 30m
2026-07-24 CAP4139 - Jul 24, 15:35 UTCJul 24, 17:10 UTC1h 35m
2026-07-24 CAP4139 - Jul 24, 14:20 UTCJul 24, 14:55 UTC35m
2026-07-24 CAP4139 MQY → NQA Jul 24, 11:40 UTCJul 24, 13:25 UTC1h 45m
2026-07-23 CAP4139 - Jul 23, 18:30 UTCJul 23, 18:40 UTC10m
2026-07-21 CAP4139 - Jul 21, 19:05 UTCJul 21, 19:20 UTC15m
2026-07-21 CAP4139 - Jul 21, 17:50 UTCJul 21, 18:25 UTC35m
2026-07-16 CAP4139 - Jul 16, 19:05 UTCJul 16, 19:14 UTC10m
2026-07-16 CAP4139 - Jul 16, 17:25 UTCJul 16, 17:40 UTC15m
2026-07-16 CAP4139 - Jul 16, 15:45 UTCJul 16, 16:00 UTC15m
2026-07-01 CAP4139 - Jul 1, 21:00 UTCJul 1, 21:15 UTC15m
2026-07-01 CAP4139 - Jul 1, 20:10 UTCJul 1, 20:20 UTC10m
2026-07-01 CAP4139 - Jul 1, 18:35 UTCJul 1, 18:50 UTC15m
2026-07-01 CAP4139 - Jul 1, 17:20 UTCJul 1, 17:45 UTC25m
2026-06-30 CAP4139 - Jun 30, 16:00 UTCJun 30, 16:10 UTC10m
2026-06-27 CAP4139 - Jun 27, 16:44 UTCJun 27, 18:54 UTC2h 10m
2026-06-24 CAP4139 - Jun 24, 19:29 UTCJun 24, 20:05 UTC35m
2026-06-24 CAP4139 - Jun 24, 15:54 UTCJun 24, 17:20 UTC1h 25m
2026-06-23 CAP4139 - Jun 23, 19:00 UTCJun 23, 20:44 UTC1h 45m
2026-06-21 CAP4139 - Jun 21, 14:15 UTCJun 21, 15:49 UTC1h 35m
2026-06-19 CAP4139 - Jun 19, 16:44 UTCJun 19, 16:55 UTC10m
2026-06-15 CAP4139 - Jun 15, 13:54 UTCJun 15, 14:34 UTC40m
2026-06-07 CAP4139 - Jun 7, 20:15 UTCJun 7, 21:00 UTC45m
2026-06-07 CAP4139 - Jun 7, 16:30 UTCJun 7, 17:05 UTC35m
2026-06-06 CAP4139 - Jun 6, 17:34 UTCJun 6, 17:44 UTC10m
2026-06-06 CAP4139 - Jun 6, 16:04 UTCJun 6, 16:14 UTC10m
2026-06-06 CAP4139 - Jun 6, 13:44 UTCJun 6, 14:04 UTC20m
2026-05-14 CAP4139 - May 14, 14:55 UTCMay 14, 15:05 UTC10m
2026-05-14 CAP4139 - May 14, 13:55 UTCMay 14, 14:10 UTC15m
2026-05-12 CAP4139 - May 12, 13:45 UTCMay 12, 14:00 UTC15m
2026-05-09 CAP4139 - May 9, 16:00 UTCMay 9, 16:25 UTC25m
2026-05-09 CAP4139 - May 9, 12:20 UTCMay 9, 12:40 UTC20m
2026-05-08 CAP4139 - May 8, 15:05 UTCMay 8, 15:50 UTC45m
2026-05-04 CAP4139 - May 4, 15:55 UTCMay 4, 16:05 UTC10m
2026-05-04 CAP4139 - May 4, 15:00 UTCMay 4, 15:10 UTC10m
2026-05-03 CAP4139 - May 3, 18:34 UTCMay 3, 19:00 UTC25m
2026-05-03 CAP4139 - May 3, 17:20 UTCMay 3, 17:29 UTC10m
2026-05-01 CAP4139 - May 1, 16:40 UTCMay 1, 16:55 UTC15m
2026-05-01 CAP4139 - May 1, 15:35 UTCMay 1, 16:00 UTC25m
2026-04-24 CAP4139 - Apr 24, 20:05 UTCApr 24, 20:15 UTC10m
2026-04-24 CAP4139 - Apr 24, 19:05 UTCApr 24, 19:20 UTC15m
2026-04-24 CAP4139 - Apr 24, 18:10 UTCApr 24, 18:25 UTC15m
2026-04-24 CAP4139 - Apr 24, 16:30 UTCApr 24, 17:25 UTC55m

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 N739CP page for operator, model, and routing details .

Mode-S A9ECBA frequently asked

What is Mode-S code A9ECBA?
A9ECBA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N739CP.
Where is Mode-S A9ECBA registered?
Mode-S code A9ECBA 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 A9ECBA broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9ECBA, octal 52366272, decimal 11,136,186.
What flights does A9ECBA operate?
Mode-S A9ECBA has broadcast 1 distinct callsign, including CAP4139.