Apparatus

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sensors Mode-S transponder

A5611A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N446CA · operated by CIVIL AIR PATROL

Hex
A5611A
Octal
51260432
Decimal
10,838,298
Country
US
Tail
N446CA
Type
C172
No current signal · last broadcast 3d ago
Flights observed
52
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A5611A.

Country allocation

The ICAO 24-bit address A5611A 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
CAP3646 - 52 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CAP3646 - Jul 17, 23:30 UTCJul 18, 01:39 UTC2h 10m
2026-07-13 CAP3646 - Jul 13, 23:10 UTCJul 13, 23:40 UTC30m
2026-07-13 CAP3646 - Jul 13, 18:00 UTCJul 13, 18:20 UTC20m
2026-07-11 CAP3646 - Jul 11, 00:05 UTCJul 11, 01:40 UTC1h 35m
2026-07-10 CAP3646 - Jul 10, 20:05 UTCJul 10, 21:30 UTC1h 25m
2026-07-09 CAP3646 - Jul 9, 04:35 UTCJul 9, 05:00 UTC25m
2026-07-09 CAP3646 - Jul 9, 02:20 UTCJul 9, 03:35 UTC1h 15m
2026-07-08 CAP3646 - Jul 8, 01:55 UTCJul 8, 03:05 UTC1h 10m
2026-07-07 CAP3646 HIO → HIO Jul 7, 00:45 UTCJul 7, 02:35 UTC1h 50m
2026-07-01 CAP3646 HIO → HIO Jul 1, 05:05 UTCJul 1, 05:20 UTC15m
2026-07-01 CAP3646 - Jul 1, 00:25 UTCJul 1, 01:30 UTC1h 5m
2026-06-28 CAP3646 - Jun 28, 21:45 UTCJun 28, 22:55 UTC1h 10m
2026-06-28 CAP3646 - Jun 28, 16:14 UTCJun 28, 17:30 UTC1h 15m
2026-06-27 CAP3646 - Jun 27, 01:24 UTCJun 27, 02:39 UTC1h 15m
2026-06-24 CAP3646 - Jun 24, 17:14 UTCJun 24, 18:29 UTC1h 15m
2026-06-22 CAP3646 HIO → HIO Jun 22, 01:40 UTCJun 22, 02:45 UTC1h 5m
2026-06-22 CAP3646 - Jun 22, 01:19 UTCJun 22, 01:29 UTC10m
2026-06-21 CAP3646 HIO → HIO Jun 21, 19:39 UTCJun 21, 21:05 UTC1h 25m
2026-06-14 CAP3646 HIO → HIO Jun 14, 16:50 UTCJun 14, 17:55 UTC1h 5m
2026-06-14 CAP3646 - Jun 14, 16:35 UTCJun 14, 16:45 UTC10m
2026-06-14 CAP3646 HIO → HIO Jun 14, 16:20 UTCJun 14, 16:25 UTC5m
2026-06-13 CAP3646 - Jun 13, 17:25 UTCJun 13, 18:45 UTC1h 20m
2026-06-13 CAP3646 - Jun 13, 16:30 UTCJun 13, 16:55 UTC25m
2026-06-06 CAP3646 - Jun 6, 21:09 UTCJun 6, 21:30 UTC20m
2026-06-06 CAP3646 - Jun 6, 20:49 UTCJun 6, 21:04 UTC15m
2026-06-06 CAP3646 - Jun 6, 20:05 UTCJun 6, 20:19 UTC15m
2026-05-31 CAP3646 - May 31, 21:20 UTCMay 31, 23:05 UTC1h 45m
2026-05-31 CAP3646 - May 31, 19:25 UTCMay 31, 20:10 UTC45m
2026-05-31 CAP3646 HIO → HIO May 31, 18:00 UTCMay 31, 18:45 UTC45m
2026-05-30 CAP3646 HIO → HIO May 30, 23:55 UTCMay 31, 00:35 UTC40m
2026-05-30 CAP3646 HIO → HIO May 30, 20:10 UTCMay 30, 21:25 UTC1h 15m
2026-05-24 CAP3646 - May 24, 18:20 UTCMay 24, 20:05 UTC1h 45m
2026-05-23 CAP3646 - May 23, 22:35 UTCMay 23, 23:10 UTC35m
2026-05-23 CAP3646 HIO → SLE May 23, 21:30 UTCMay 23, 22:05 UTC35m
2026-05-22 CAP3646 HIO → HIO May 22, 18:30 UTCMay 22, 19:35 UTC1h 5m
2026-05-22 CAP3646 HIO → HIO May 22, 04:20 UTCMay 22, 05:35 UTC1h 15m
2026-05-21 CAP3646 - May 21, 18:30 UTCMay 21, 19:35 UTC1h 5m
2026-05-12 CAP3646 - May 12, 02:45 UTCMay 12, 04:15 UTC1h 30m
2026-05-11 CAP3646 - May 11, 00:25 UTCMay 11, 01:55 UTC1h 30m
2026-05-10 CAP3646 - May 10, 23:15 UTCMay 10, 23:35 UTC20m
2026-05-10 CAP3646 - May 10, 20:40 UTCMay 10, 21:44 UTC1h 5m
2026-05-10 CAP3646 - May 10, 17:05 UTCMay 10, 17:40 UTC35m
2026-05-09 CAP3646 - May 9, 23:09 UTCMay 9, 23:25 UTC15m
2026-05-09 CAP3646 - May 9, 14:05 UTCMay 9, 14:20 UTC15m
2026-05-08 CAP3646 - May 8, 01:09 UTCMay 8, 02:44 UTC1h 35m
2026-05-07 CAP3646 - May 7, 20:05 UTCMay 7, 21:55 UTC1h 50m
2026-05-01 CAP3646 - May 1, 05:20 UTCMay 1, 05:25 UTC5m
2026-05-01 CAP3646 - May 1, 04:30 UTCMay 1, 05:15 UTC45m
2026-04-29 CAP3646 HIO → HIO Apr 29, 18:15 UTCApr 29, 20:30 UTC2h 15m
2026-04-26 CAP3646 HIO → HIO Apr 26, 20:45 UTCApr 26, 21:35 UTC50m

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 N446CA page for operator, model, and routing details .

Mode-S A5611A frequently asked

What is Mode-S code A5611A?
A5611A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N446CA.
Where is Mode-S A5611A registered?
Mode-S code A5611A 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 A5611A broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5611A, octal 51260432, decimal 10,838,298.
What flights does A5611A operate?
Mode-S A5611A has broadcast 1 distinct callsign, including CAP3646.