Apparatus

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sensors Mode-S transponder

A7A39B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5911B · CESSNA 182 Skylane · operated by KATZER JAMIN

Hex
A7A39B
Octal
51721633
Decimal
10,986,395
Country
US
Tail
N5911B
Type
C182
No current signal · last broadcast 2d ago
Flights observed
51
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A7A39B.

Country allocation

The ICAO 24-bit address A7A39B 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
N5911B - 51 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N5911B - Jul 26, 13:40 UTCJul 26, 22:45 UTC9h 5m
2026-07-25 N5911B - Jul 25, 21:20 UTCJul 26, 01:30 UTC4h 10m
2026-07-19 N5911B - Jul 19, 13:45 UTCJul 19, 23:05 UTC9h 20m
2026-07-18 N5911B - Jul 18, 21:15 UTCJul 18, 22:40 UTC1h 25m
2026-07-18 N5911B - Jul 18, 14:00 UTCJul 18, 20:10 UTC6h 10m
2026-07-18 N5911B - Jul 18, 01:15 UTCJul 18, 01:25 UTC10m
2026-07-17 N5911B - Jul 17, 21:00 UTCJul 17, 23:10 UTC2h 10m
2026-07-17 N5911B - Jul 17, 17:50 UTCJul 17, 18:44 UTC55m
2026-07-03 N5911B - Jul 3, 01:20 UTCJul 3, 02:30 UTC1h 10m
2026-07-03 N5911B - Jul 3, 00:35 UTCJul 3, 00:50 UTC15m
2026-06-28 N5911B - Jun 28, 11:45 UTCJun 28, 12:09 UTC25m
2026-06-28 N5911B - Jun 28, 00:45 UTCJun 28, 01:10 UTC25m
2026-06-27 N5911B - Jun 27, 11:44 UTCJun 27, 12:09 UTC25m
2026-06-26 N5911B - Jun 26, 11:45 UTCJun 26, 12:14 UTC30m
2026-06-22 N5911B - Jun 22, 20:44 UTCJun 22, 21:14 UTC30m
2026-06-22 N5911B - Jun 22, 17:44 UTCJun 22, 18:24 UTC40m
2026-06-22 N5911B - Jun 22, 15:29 UTCJun 22, 17:10 UTC1h 40m
2026-06-20 N5911B - Jun 20, 19:15 UTCJun 21, 01:45 UTC6h 30m
2026-06-20 N5911B - Jun 20, 17:39 UTCJun 20, 18:40 UTC1h 0m
2026-06-20 N5911B - Jun 20, 16:09 UTCJun 20, 17:04 UTC55m
2026-06-20 N5911B - Jun 20, 14:35 UTCJun 20, 15:34 UTC1h 0m
2026-06-20 N5911B - Jun 20, 13:34 UTCJun 20, 13:59 UTC25m
2026-06-20 N5911B - Jun 20, 00:29 UTCJun 20, 01:05 UTC35m
2026-06-19 N5911B - Jun 19, 23:34 UTCJun 19, 23:54 UTC20m
2026-06-19 N5911B - Jun 19, 21:39 UTCJun 19, 22:19 UTC40m
2026-06-14 N5911B - Jun 14, 17:50 UTCJun 14, 18:55 UTC1h 5m
2026-06-14 N5911B - Jun 14, 14:50 UTCJun 14, 16:25 UTC1h 35m
2026-06-14 N5911B - Jun 14, 13:55 UTCJun 14, 14:20 UTC25m
2026-06-13 N5911B - Jun 13, 18:45 UTCJun 13, 23:00 UTC4h 15m
2026-06-13 N5911B - Jun 13, 14:20 UTCJun 13, 16:15 UTC1h 55m
2026-06-12 N5911B - Jun 12, 21:00 UTCJun 13, 01:25 UTC4h 25m
2026-06-12 N5911B - Jun 12, 19:25 UTCJun 12, 20:25 UTC1h 0m
2026-06-12 N5911B - Jun 12, 17:15 UTCJun 12, 18:20 UTC1h 5m
2026-06-12 N5911B - Jun 12, 16:00 UTCJun 12, 16:30 UTC30m
2026-06-12 N5911B - Jun 12, 13:30 UTCJun 12, 14:15 UTC45m
2026-06-09 N5911B - Jun 9, 16:45 UTCJun 9, 17:30 UTC45m
2026-06-07 N5911B - Jun 7, 23:20 UTCJun 7, 23:35 UTC15m
2026-06-07 N5911B - Jun 7, 21:15 UTCJun 7, 22:20 UTC1h 5m
2026-06-07 N5911B - Jun 7, 18:05 UTCJun 7, 19:55 UTC1h 50m
2026-06-07 N5911B - Jun 7, 17:10 UTCJun 7, 17:25 UTC15m
2026-06-07 N5911B - Jun 7, 15:35 UTCJun 7, 16:35 UTC1h 0m
2026-06-07 N5911B - Jun 7, 14:35 UTCJun 7, 14:50 UTC15m
2026-05-30 N5911B - May 30, 18:05 UTCMay 30, 18:15 UTC10m
2026-05-30 N5911B - May 30, 16:55 UTCMay 30, 17:05 UTC10m
2026-05-30 N5911B - May 30, 16:00 UTCMay 30, 16:10 UTC10m
2026-05-27 N5911B - May 27, 16:20 UTCMay 27, 18:10 UTC1h 50m
2026-05-23 N5911B - May 23, 19:45 UTCMay 23, 21:00 UTC1h 15m
2026-05-22 N5911B - May 22, 15:35 UTCMay 22, 16:00 UTC25m
2026-05-16 N5911B - May 16, 20:05 UTCMay 16, 21:00 UTC55m
2026-04-25 N5911B - Apr 25, 14:25 UTCApr 25, 14:45 UTC20m

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 N5911B page for operator, model, and routing details .

Mode-S A7A39B frequently asked

What is Mode-S code A7A39B?
A7A39B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5911B.
Where is Mode-S A7A39B registered?
Mode-S code A7A39B 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 A7A39B 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 A7A39B, octal 51721633, decimal 10,986,395.
What flights does A7A39B operate?
Mode-S A7A39B has broadcast 1 distinct callsign, including N5911B.