Apparatus

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sensors Mode-S transponder

A3BB5F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N34EF · operated by CIRRUS DESIGN CORP

Hex
A3BB5F
Octal
50735537
Decimal
10,730,335
Country
US
Tail
N34EF
Type
SR20
No current signal · last broadcast 3d ago
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A3BB5F.

Country allocation

The ICAO 24-bit address A3BB5F 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
N34EF - 112 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N34EF - Jul 26, 18:10 UTCJul 26, 20:05 UTC1h 55m
2026-07-26 N34EF - Jul 26, 13:30 UTCJul 26, 14:45 UTC1h 15m
2026-07-25 N34EF - Jul 25, 22:10 UTCJul 25, 23:15 UTC1h 5m
2026-07-25 N34EF - Jul 25, 18:40 UTCJul 25, 19:55 UTC1h 15m
2026-07-25 N34EF - Jul 25, 13:20 UTCJul 25, 14:15 UTC55m
2026-07-25 N34EF - Jul 25, 11:05 UTCJul 25, 12:10 UTC1h 5m
2026-07-24 N34EF - Jul 24, 17:20 UTCJul 24, 19:10 UTC1h 50m
2026-07-24 N34EF - Jul 24, 15:00 UTCJul 24, 16:35 UTC1h 35m
2026-07-22 N34EF - Jul 22, 19:00 UTCJul 22, 21:15 UTC2h 15m
2026-07-22 N34EF - Jul 22, 14:20 UTCJul 22, 15:55 UTC1h 35m
2026-07-20 N34EF - Jul 20, 17:20 UTCJul 20, 17:55 UTC35m
2026-07-20 N34EF - Jul 20, 17:00 UTCJul 20, 17:10 UTC10m
2026-07-20 N34EF - Jul 20, 16:10 UTCJul 20, 16:45 UTC35m
2026-07-19 N34EF - Jul 19, 18:25 UTCJul 19, 19:15 UTC50m
2026-07-19 N34EF - Jul 19, 15:40 UTCJul 19, 16:10 UTC30m
2026-07-11 N34EF PCT → PCT Jul 11, 21:55 UTCJul 11, 22:15 UTC20m
2026-07-11 N34EF - Jul 11, 17:35 UTCJul 11, 18:00 UTC25m
2026-07-11 N34EF - Jul 11, 14:15 UTCJul 11, 15:30 UTC1h 15m
2026-07-10 N34EF - Jul 10, 15:40 UTCJul 10, 16:55 UTC1h 15m
2026-07-08 N34EF - Jul 8, 22:35 UTCJul 8, 23:05 UTC30m
2026-07-08 N34EF - Jul 8, 22:15 UTCJul 8, 22:25 UTC10m
2026-07-08 N34EF - Jul 8, 21:35 UTCJul 8, 22:10 UTC35m
2026-07-05 N34EF - Jul 5, 22:40 UTCJul 5, 23:45 UTC1h 5m
2026-07-05 N34EF - Jul 5, 21:15 UTCJul 5, 21:40 UTC25m
2026-07-04 N34EF - Jul 4, 21:05 UTCJul 4, 22:30 UTC1h 25m
2026-07-03 N34EF PCT → PCT Jul 3, 13:30 UTCJul 3, 14:20 UTC50m
2026-07-02 N34EF - Jul 2, 20:00 UTCJul 2, 21:00 UTC1h 0m
2026-07-01 N34EF - Jul 1, 18:30 UTCJul 1, 19:55 UTC1h 25m
2026-06-30 N34EF - Jun 30, 15:05 UTCJun 30, 15:45 UTC40m
2026-06-26 N34EF - Jun 26, 00:35 UTCJun 26, 00:50 UTC15m
2026-06-25 N34EF - Jun 25, 23:09 UTCJun 25, 23:55 UTC45m
2026-06-25 N34EF - Jun 25, 22:04 UTCJun 25, 22:20 UTC15m
2026-06-24 N34EF - Jun 24, 19:04 UTCJun 24, 19:15 UTC10m
2026-06-15 N34EF - Jun 15, 16:24 UTCJun 15, 16:35 UTC10m
2026-06-14 N34EF LNS → PCT Jun 14, 21:40 UTCJun 14, 22:20 UTC40m
2026-06-14 N34EF - Jun 14, 20:55 UTCJun 14, 21:35 UTC40m
2026-06-12 N34EF - Jun 12, 18:35 UTCJun 12, 19:30 UTC55m
2026-06-11 N34EF - Jun 11, 20:25 UTCJun 11, 21:05 UTC40m
2026-06-11 N34EF - Jun 11, 18:55 UTCJun 11, 19:35 UTC40m
2026-06-09 N34EF - Jun 9, 01:25 UTCJun 9, 02:00 UTC35m
2026-06-07 N34EF LNS → PCT Jun 7, 21:10 UTCJun 7, 21:50 UTC40m
2026-06-07 N34EF - Jun 7, 20:25 UTCJun 7, 21:05 UTC40m
2026-06-06 N34EF - Jun 6, 18:09 UTCJun 6, 19:10 UTC1h 0m
2026-06-06 N34EF - Jun 6, 15:25 UTCJun 6, 15:34 UTC10m
2026-06-06 N34EF - Jun 6, 13:05 UTCJun 6, 14:40 UTC1h 35m
2026-06-05 N34EF - Jun 5, 20:00 UTCJun 5, 20:30 UTC30m
2026-06-05 N34EF - Jun 5, 18:50 UTCJun 5, 19:15 UTC25m
2026-06-05 N34EF PCT → PCT Jun 5, 16:20 UTCJun 5, 16:50 UTC30m
2026-05-31 N34EF - May 31, 22:55 UTCMay 31, 23:25 UTC30m
2026-05-31 N34EF - May 31, 22:35 UTCMay 31, 22:45 UTC10m

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 N34EF page for operator, model, and routing details .

Mode-S A3BB5F frequently asked

What is Mode-S code A3BB5F?
A3BB5F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N34EF.
Where is Mode-S A3BB5F registered?
Mode-S code A3BB5F 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 A3BB5F 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 A3BB5F, octal 50735537, decimal 10,730,335.
What flights does A3BB5F operate?
Mode-S A3BB5F has broadcast 1 distinct callsign, including N34EF.