Apparatus

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sensors Mode-S transponder

A06737

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N125KS · BEECH 200 Super King Air · operated by ALPINE AVIATION INC

Hex
A06737
Octal
50063467
Decimal
10,512,183
Country
US
Tail
N125KS
Type
BE20
No current signal · last broadcast 15h ago
Flights observed
67
Distinct callsigns
8
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A06737.

Country allocation

The ICAO 24-bit address A06737 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 8 distinct

Callsign Airline Flights Last seen
AIP302 Alpine Air Express 33 2026-05-29
AIP303 Alpine Air Express 21 2026-05-29
AIP531 Alpine Air Express 3 2026-05-19
AIP429 Alpine Air Express 3 2026-04-21
AIP418 - 3 2026-04-13
AIP9 - 2 2026-04-18
AIP270 Alpine Air Express 1 2026-05-04
AIP2128 Alpine Air Express 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AIP303 SLC → BIL May 29, 11:15 UTCMay 29, 11:40 UTC25m
2026-05-29 AIP302 BIL → SLC May 29, 10:30 UTCMay 29, 10:45 UTC15m
2026-05-29 AIP302 BIL → SLC May 29, 09:15 UTCMay 29, 09:25 UTC10m
2026-05-28 AIP303 SLC → BIL May 28, 11:15 UTCMay 28, 11:35 UTC20m
2026-05-28 AIP302 BIL → SLC May 28, 10:05 UTCMay 28, 10:30 UTC25m
2026-05-28 AIP302 BIL → SLC May 28, 09:00 UTCMay 28, 09:10 UTC10m
2026-05-27 AIP303 SLC → BIL May 27, 11:15 UTCMay 27, 11:40 UTC25m
2026-05-27 AIP302 BIL → SLC May 27, 10:00 UTCMay 27, 10:25 UTC25m
2026-05-26 AIP303 SLC → BIL May 26, 11:00 UTCMay 26, 11:34 UTC35m
2026-05-26 AIP302 BIL → SLC May 26, 10:05 UTCMay 26, 10:20 UTC15m
2026-05-26 AIP302 BIL → SLC May 26, 08:50 UTCMay 26, 08:59 UTC10m
2026-05-22 AIP303 SLC → BIL May 22, 11:25 UTCMay 22, 11:55 UTC30m
2026-05-22 AIP302 BIL → SLC May 22, 09:55 UTCMay 22, 10:20 UTC25m
2026-05-22 AIP302 BIL → SLC May 22, 08:55 UTCMay 22, 09:10 UTC15m
2026-05-21 AIP303 SLC → BIL May 21, 11:20 UTCMay 21, 11:50 UTC30m
2026-05-21 AIP302 BIL → SLC May 21, 10:10 UTCMay 21, 10:35 UTC25m
2026-05-21 AIP302 BIL → SLC May 21, 09:00 UTCMay 21, 09:10 UTC10m
2026-05-20 AIP303 SLC → BIL May 20, 11:30 UTCMay 20, 11:55 UTC25m
2026-05-20 AIP302 BIL → SLC May 20, 10:05 UTCMay 20, 10:25 UTC20m
2026-05-20 AIP302 BIL → SLC May 20, 08:55 UTCMay 20, 09:05 UTC10m
2026-05-19 AIP531 PIB → AUO May 19, 14:30 UTCMay 19, 15:00 UTC30m
2026-05-19 AIP531 PIB → AUO May 19, 12:35 UTCMay 19, 13:05 UTC30m
2026-05-19 AIP531 PIB → AUO May 19, 11:35 UTCMay 19, 11:45 UTC10m
2026-05-18 AIP303 SLC → BIL May 18, 11:30 UTCMay 18, 11:55 UTC25m
2026-05-18 AIP302 BIL → SLC May 18, 09:55 UTCMay 18, 10:25 UTC30m
2026-05-18 AIP302 BIL → SLC May 18, 08:45 UTCMay 18, 08:55 UTC10m
2026-05-08 AIP303 SLC → BIL May 8, 10:59 UTCMay 8, 11:25 UTC25m
2026-05-08 AIP302 BIL → SLC May 8, 09:49 UTCMay 8, 10:14 UTC25m
2026-05-07 AIP303 SLC → BIL May 7, 10:15 UTCMay 7, 11:45 UTC1h 30m
2026-05-07 AIP302 BIL → SLC May 7, 09:15 UTCMay 7, 09:25 UTC10m
2026-05-06 AIP303 SLC → BIL May 6, 11:00 UTCMay 6, 11:30 UTC30m
2026-05-06 AIP302 BIL → SLC May 6, 09:50 UTCMay 6, 10:15 UTC25m
2026-05-05 AIP303 SLC → BIL May 5, 11:30 UTCMay 5, 12:00 UTC30m
2026-05-05 AIP302 BIL → SLC May 5, 10:20 UTCMay 5, 10:40 UTC20m
2026-05-04 AIP270 BIL → BTM May 4, 17:10 UTCMay 4, 17:25 UTC15m
2026-05-01 AIP2128 BIL → FCA May 1, 00:35 UTCMay 1, 00:45 UTC10m
2026-04-28 AIP303 SLC → BIL Apr 28, 13:50 UTCApr 28, 14:20 UTC30m
2026-04-28 AIP303 SLC → BIL Apr 28, 12:30 UTCApr 28, 12:55 UTC25m
2026-04-27 AIP302 BIL → SLC Apr 27, 10:05 UTCApr 27, 11:40 UTC1h 35m
2026-04-27 AIP302 BIL → SLC Apr 27, 08:55 UTCApr 27, 09:05 UTC10m
2026-04-24 AIP302 BIL → SLC Apr 24, 10:15 UTCApr 24, 11:35 UTC1h 20m
2026-04-24 AIP302 BIL → SLC Apr 24, 09:10 UTCApr 24, 09:20 UTC10m
2026-04-23 AIP303 SLC → BIL Apr 23, 11:15 UTCApr 23, 11:30 UTC15m
2026-04-23 AIP302 BIL → SLC Apr 23, 10:05 UTCApr 23, 10:25 UTC20m
2026-04-22 AIP303 SLC → BIL Apr 22, 11:30 UTCApr 22, 11:50 UTC20m
2026-04-22 AIP302 BIL → SLC Apr 22, 10:20 UTCApr 22, 10:40 UTC20m
2026-04-22 AIP302 BIL → SLC Apr 22, 09:00 UTCApr 22, 09:10 UTC10m
2026-04-21 AIP429 BIL → SLC Apr 21, 14:15 UTCApr 21, 14:40 UTC25m
2026-04-21 AIP429 BIL → SLC Apr 21, 12:45 UTCApr 21, 13:05 UTC20m
2026-04-21 AIP429 BIL → SLC Apr 21, 11:30 UTCApr 21, 11:45 UTC15m

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 N125KS page for operator, model, and routing details .

Mode-S A06737 frequently asked

What is Mode-S code A06737?
A06737 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N125KS.
Where is Mode-S A06737 registered?
Mode-S code A06737 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 A06737 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A06737, octal 50063467, decimal 10,512,183.
What flights does A06737 operate?
Mode-S A06737 has broadcast 8 distinct callsigns, including AIP302, AIP303, AIP531, AIP429, AIP418.