Apparatus

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sensors Mode-S transponder

A4108B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N361FL · CONVAIR Convairliner · operated by GULF & CARIBBEAN CARGO INC

Hex
A4108B
Octal
51010213
Decimal
10,752,139
Country
US
Tail
N361FL
Type
CVLP
No current signal · last broadcast 19d ago
Flights observed
69
Distinct callsigns
9
Country
US
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S A4108B.

Country allocation

The ICAO 24-bit address A4108B 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 9 distinct

Callsign Airline Flights Last seen
TSU361 Gulf & Caribbean Cargo / Contract Air Cargo 17 2026-07-08
CAY909 Cayman Airways 17 2026-07-23
CAY908 Cayman Airways 17 2026-07-23
CAY2909 Cayman Airways 6 2026-07-24
CAY2908 Cayman Airways 6 2026-07-24
TSU802 - 2 2026-07-08
TSU801 - 2 2026-07-08
TSU804 - 1 2026-07-08
TSU803 - 1 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CAY2908 GCM → MIA Jul 24, 17:25 UTCJul 24, 17:55 UTC30m
2026-07-24 CAY2909 MIA → GCM Jul 24, 13:40 UTCJul 24, 14:05 UTC25m
2026-07-23 CAY908 GCM → MIA Jul 23, 17:35 UTCJul 23, 18:00 UTC25m
2026-07-23 CAY909 MIA → GCM Jul 23, 13:45 UTCJul 23, 14:15 UTC30m
2026-07-21 CAY908 GCM → MIA Jul 21, 17:10 UTCJul 21, 17:35 UTC25m
2026-07-21 CAY909 MIA → GCM Jul 21, 13:20 UTCJul 21, 13:50 UTC30m
2026-07-16 CAY908 GCM → MIA Jul 16, 18:29 UTCJul 16, 18:59 UTC30m
2026-07-16 CAY909 MIA → GCM Jul 16, 14:55 UTCJul 16, 15:19 UTC25m
2026-07-14 CAY908 GCM → MIA Jul 14, 17:35 UTCJul 14, 18:10 UTC35m
2026-07-14 CAY909 MIA → GCM Jul 14, 14:00 UTCJul 14, 14:30 UTC30m
2026-07-10 CAY2908 GCM → MIA Jul 10, 17:05 UTCJul 10, 17:35 UTC30m
2026-07-10 CAY2909 MIA → GCM Jul 10, 13:25 UTCJul 10, 14:00 UTC35m
2026-07-09 CAY908 GCM → MIA Jul 9, 18:50 UTCJul 9, 19:25 UTC35m
2026-07-09 CAY909 MIA → GCM Jul 9, 15:00 UTCJul 9, 15:25 UTC25m
2026-07-08 TSU804 - Jul 8, 20:50 UTCJul 8, 21:15 UTC25m
2026-07-08 TSU803 - Jul 8, 18:30 UTCJul 8, 18:55 UTC25m
2026-07-08 TSU802 - Jul 8, 16:15 UTCJul 8, 16:35 UTC20m
2026-07-08 TSU801 - Jul 8, 14:05 UTCJul 8, 14:30 UTC25m
2026-07-08 TSU361 - Jul 8, 12:35 UTCJul 8, 12:45 UTC10m
2026-07-07 CAY908 GCM → MIA Jul 7, 18:05 UTCJul 7, 18:40 UTC35m
2026-07-07 CAY909 MIA → GCM Jul 7, 14:00 UTCJul 7, 14:35 UTC35m
2026-07-03 CAY2908 GCM → MIA Jul 3, 16:40 UTCJul 3, 17:05 UTC25m
2026-07-03 CAY2909 MIA → GCM Jul 3, 13:05 UTCJul 3, 13:30 UTC25m
2026-07-02 CAY908 GCM → MIA Jul 2, 18:30 UTCJul 2, 19:00 UTC30m
2026-07-02 CAY909 MIA → GCM Jul 2, 14:45 UTCJul 2, 15:10 UTC25m
2026-06-30 CAY908 GCM → MIA Jun 30, 18:20 UTCJun 30, 18:45 UTC25m
2026-06-30 CAY909 MIA → GCM Jun 30, 14:35 UTCJun 30, 15:05 UTC30m
2026-06-26 CAY2908 GCM → MIA Jun 26, 17:29 UTCJun 26, 17:59 UTC30m
2026-06-26 CAY2909 MIA → GCM Jun 26, 13:45 UTCJun 26, 14:09 UTC25m
2026-06-25 CAY908 GCM → MIA Jun 25, 17:34 UTCJun 25, 18:04 UTC30m
2026-06-25 CAY909 MIA → GCM Jun 25, 14:04 UTCJun 25, 14:29 UTC25m
2026-06-23 CAY908 GCM → MIA Jun 23, 17:39 UTCJun 23, 18:14 UTC35m
2026-06-23 CAY909 MIA → GCM Jun 23, 13:45 UTCJun 23, 14:19 UTC35m
2026-06-18 CAY908 GCM → MIA Jun 18, 17:50 UTCJun 18, 18:25 UTC35m
2026-06-18 CAY909 MIA → GCM Jun 18, 14:01 UTCJun 18, 14:25 UTC25m
2026-06-16 CAY908 GCM → MIA Jun 16, 19:05 UTCJun 16, 19:40 UTC35m
2026-06-16 CAY909 MIA → GCM Jun 16, 15:05 UTCJun 16, 15:35 UTC30m
2026-06-11 CAY908 GCM → MIA Jun 11, 18:15 UTCJun 11, 18:50 UTC35m
2026-06-11 CAY909 MIA → GCM Jun 11, 14:35 UTCJun 11, 15:10 UTC35m
2026-06-10 CAY2908 GCM → MIA Jun 10, 17:00 UTCJun 10, 17:35 UTC35m
2026-06-10 CAY2909 MIA → GCM Jun 10, 13:20 UTCJun 10, 13:55 UTC35m
2026-06-09 CAY908 GCM → MIA Jun 9, 18:55 UTCJun 9, 19:25 UTC30m
2026-06-09 CAY909 MIA → GCM Jun 9, 14:15 UTCJun 9, 14:50 UTC35m
2026-06-04 CAY908 GCM → MIA Jun 4, 18:05 UTCJun 4, 18:35 UTC30m
2026-06-04 CAY909 MIA → GCM Jun 4, 14:15 UTCJun 4, 14:45 UTC30m
2026-06-03 TSU802 NAS → OPF Jun 3, 19:10 UTCJun 3, 19:35 UTC25m
2026-06-03 TSU801 OPF → NAS Jun 3, 16:25 UTCJun 3, 16:50 UTC25m
2026-06-03 TSU361 - Jun 3, 11:30 UTCJun 3, 11:40 UTC10m
2026-06-02 CAY908 GCM → MIA Jun 2, 18:00 UTCJun 2, 18:25 UTC25m
2026-06-02 CAY909 MIA → GCM Jun 2, 14:00 UTCJun 2, 14:25 UTC25m

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 N361FL page for operator, model, and routing details .

Mode-S A4108B frequently asked

What is Mode-S code A4108B?
A4108B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N361FL.
Where is Mode-S A4108B registered?
Mode-S code A4108B 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 A4108B broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4108B, octal 51010213, decimal 10,752,139.
What flights does A4108B operate?
Mode-S A4108B has broadcast 9 distinct callsigns, including TSU361, CAY909, CAY908, CAY2909, CAY2908.