Apparatus

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sensors Mode-S transponder

A4CBEB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N408SB · operated by GULFSTREAM AEROSPACE CORP

Hex
A4CBEB
Octal
51145753
Decimal
10,800,107
Country
US
Tail
N408SB
No current signal · last broadcast 1d ago
Flights observed
24
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A4CBEB.

Country allocation

The ICAO 24-bit address A4CBEB 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
N408SB - 24 2026-06-08

Recent flights last 24

DateFlightRouteTakeoffLandingDuration
2026-06-08 N408SB BCN → FAO Jun 8, 15:35 UTCJun 8, 17:00 UTC1h 25m
2026-06-08 N408SB - Jun 8, 08:20 UTCJun 8, 08:55 UTC35m
2026-06-07 N408SB - Jun 7, 00:55 UTCJun 7, 08:35 UTC7h 40m
2026-06-06 N408SB - Jun 6, 22:34 UTCJun 7, 00:00 UTC1h 25m
2026-06-01 N408SB - Jun 1, 00:25 UTCJun 1, 01:35 UTC1h 10m
2026-05-31 N408SB SJC → LAX May 31, 22:40 UTCMay 31, 23:35 UTC55m
2026-05-28 N408SB - May 28, 18:40 UTCMay 28, 20:15 UTC1h 35m
2026-05-25 N408SB - May 25, 22:00 UTCMay 25, 23:30 UTC1h 30m
2026-05-25 N408SB - May 25, 19:59 UTCMay 25, 21:19 UTC1h 20m
2026-05-22 N408SB SJC → PDX May 22, 18:10 UTCMay 22, 19:30 UTC1h 20m
2026-05-22 N408SB - May 22, 00:40 UTCMay 22, 02:00 UTC1h 20m
2026-05-21 N408SB SJC → PDX May 21, 22:25 UTCMay 21, 23:55 UTC1h 30m
2026-05-21 N408SB - May 21, 18:10 UTCMay 21, 19:45 UTC1h 35m
2026-04-29 N408SB - Apr 29, 23:00 UTCApr 30, 02:30 UTC3h 29m
2026-04-27 N408SB - Apr 27, 23:20 UTCApr 28, 03:55 UTC4h 35m
2026-04-25 N408SB - Apr 25, 19:30 UTCApr 25, 21:00 UTC1h 30m
2026-04-25 N408SB - Apr 25, 16:30 UTCApr 25, 17:55 UTC1h 25m
2026-04-23 N408SB LIN → SJC Apr 23, 10:25 UTCApr 23, 21:20 UTC10h 54m
2026-04-20 N408SB - Apr 20, 16:45 UTCApr 20, 17:20 UTC35m
2026-04-20 N408SB - Apr 20, 08:45 UTCApr 20, 09:20 UTC35m
2026-04-18 N408SB - Apr 18, 07:25 UTCApr 18, 09:15 UTC1h 50m
2026-04-18 N408SB - Apr 18, 06:50 UTCApr 18, 07:20 UTC30m
2026-04-18 N408SB - Apr 18, 01:25 UTCApr 18, 02:05 UTC40m
2026-04-18 N408SB - Apr 18, 00:30 UTCApr 18, 09:15 UTC8h 45m

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 N408SB page for operator, model, and routing details .

Mode-S A4CBEB frequently asked

What is Mode-S code A4CBEB?
A4CBEB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N408SB.
Where is Mode-S A4CBEB registered?
Mode-S code A4CBEB 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 A4CBEB broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CBEB, octal 51145753, decimal 10,800,107.
What flights does A4CBEB operate?
Mode-S A4CBEB has broadcast 1 distinct callsign, including N408SB.