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sensors Mode-S transponder

A42B09

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N368LL · operated by CRITICAL CARE SERVICES INC. DBA LIFE LINK III

Hex
A42B09
Octal
51025411
Decimal
10,758,921
Country
US
Tail
N368LL
No current signal · last broadcast 17d ago
Flights observed
125
Distinct callsigns
1
Country
US
Last broadcast
17d ago

Last known position

Most recent position reported by Mode-S A42B09.

Country allocation

The ICAO 24-bit address A42B09 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
N368LL - 125 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N368LL - Jul 26, 19:55 UTCJul 26, 20:15 UTC20m
2026-07-26 N368LL - Jul 26, 19:05 UTCJul 26, 19:15 UTC10m
2026-07-25 N368LL - Jul 25, 17:10 UTCJul 25, 17:50 UTC40m
2026-07-24 N368LL - Jul 24, 19:05 UTCJul 24, 19:20 UTC15m
2026-07-24 N368LL - Jul 24, 18:20 UTCJul 24, 18:30 UTC10m
2026-07-22 N368LL - Jul 22, 20:15 UTCJul 22, 20:55 UTC40m
2026-07-21 N368LL - Jul 21, 17:25 UTCJul 21, 18:20 UTC55m
2026-07-20 N368LL - Jul 20, 16:30 UTCJul 20, 17:20 UTC50m
2026-07-20 N368LL - Jul 20, 01:45 UTCJul 20, 02:50 UTC1h 5m
2026-07-19 N368LL - Jul 19, 22:25 UTCJul 19, 22:35 UTC10m
2026-07-19 N368LL - Jul 19, 19:20 UTCJul 19, 19:40 UTC20m
2026-07-19 N368LL - Jul 19, 13:25 UTCJul 19, 13:40 UTC15m
2026-07-19 N368LL - Jul 19, 12:45 UTCJul 19, 12:55 UTC10m
2026-07-17 N368LL - Jul 17, 23:00 UTCJul 17, 23:45 UTC45m
2026-07-17 N368LL - Jul 17, 12:25 UTCJul 17, 13:10 UTC45m
2026-07-17 N368LL - Jul 17, 08:35 UTCJul 17, 10:05 UTC1h 30m
2026-07-16 N368LL - Jul 16, 23:49 UTCJul 17, 00:04 UTC15m
2026-07-16 N368LL - Jul 16, 22:49 UTCJul 16, 23:15 UTC25m
2026-07-15 N368LL - Jul 15, 18:55 UTCJul 15, 19:15 UTC20m
2026-07-15 N368LL - Jul 15, 18:05 UTCJul 15, 18:15 UTC10m
2026-07-15 N368LL - Jul 15, 13:30 UTCJul 15, 14:00 UTC30m
2026-07-14 N368LL - Jul 14, 17:15 UTCJul 14, 18:10 UTC55m
2026-07-14 N368LL - Jul 14, 05:55 UTCJul 14, 06:05 UTC10m
2026-07-14 N368LL - Jul 14, 05:05 UTCJul 14, 05:20 UTC15m
2026-07-14 N368LL - Jul 14, 00:30 UTCJul 14, 03:15 UTC2h 45m
2026-07-13 N368LL - Jul 13, 21:55 UTCJul 13, 22:10 UTC15m
2026-07-13 N368LL - Jul 13, 00:35 UTCJul 13, 01:10 UTC35m
2026-07-12 N368LL - Jul 12, 13:50 UTCJul 12, 14:10 UTC20m
2026-07-12 N368LL - Jul 12, 01:25 UTCJul 12, 02:20 UTC55m
2026-07-11 N368LL - Jul 11, 02:05 UTCJul 11, 02:55 UTC50m
2026-07-10 N368LL - Jul 10, 21:30 UTCJul 10, 21:45 UTC15m
2026-07-10 N368LL - Jul 10, 20:45 UTCJul 10, 20:55 UTC10m
2026-07-10 N368LL - Jul 10, 05:55 UTCJul 10, 06:10 UTC15m
2026-07-10 N368LL - Jul 10, 01:35 UTCJul 10, 01:50 UTC15m
2026-07-10 N368LL - Jul 10, 00:55 UTCJul 10, 01:05 UTC10m
2026-07-09 N368LL - Jul 9, 19:10 UTCJul 9, 19:25 UTC15m
2026-07-09 N368LL - Jul 9, 18:15 UTCJul 9, 18:25 UTC10m
2026-07-09 N368LL - Jul 9, 01:55 UTCJul 9, 02:10 UTC15m
2026-07-08 N368LL - Jul 8, 21:10 UTCJul 8, 22:05 UTC55m
2026-07-08 N368LL - Jul 8, 20:30 UTCJul 8, 20:40 UTC10m
2026-07-06 N368LL - Jul 6, 05:50 UTCJul 6, 06:50 UTC1h 0m
2026-07-06 N368LL - Jul 6, 02:05 UTCJul 6, 03:25 UTC1h 20m
2026-07-05 N368LL - Jul 5, 03:00 UTCJul 5, 03:55 UTC55m
2026-07-04 N368LL - Jul 4, 08:05 UTCJul 4, 08:15 UTC10m
2026-07-04 N368LL - Jul 4, 05:15 UTCJul 4, 05:40 UTC25m
2026-07-04 N368LL - Jul 4, 01:25 UTCJul 4, 02:45 UTC1h 20m
2026-07-03 N368LL - Jul 3, 23:50 UTCJul 4, 00:35 UTC45m
2026-07-03 N368LL - Jul 3, 06:05 UTCJul 3, 06:55 UTC50m
2026-07-03 N368LL - Jul 3, 02:40 UTCJul 3, 02:55 UTC15m
2026-07-02 N368LL - Jul 2, 23:20 UTCJul 2, 23:40 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 N368LL page for operator, model, and routing details .

Mode-S A42B09 frequently asked

What is Mode-S code A42B09?
A42B09 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N368LL.
Where is Mode-S A42B09 registered?
Mode-S code A42B09 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 A42B09 broadcasting right now?
No active broadcast right now. Last signal was 17d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A42B09, octal 51025411, decimal 10,758,921.
What flights does A42B09 operate?
Mode-S A42B09 has broadcast 1 distinct callsign, including N368LL.