Apparatus

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sensors Mode-S transponder

A0C5B5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N149SF · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A0C5B5
Octal
50142665
Decimal
10,536,373
Country
US
Tail
N149SF
Type
B190
No current signal · last broadcast 5d ago
Flights observed
86
Distinct callsigns
18
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S A0C5B5.

Country allocation

The ICAO 24-bit address A0C5B5 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 18 distinct

Callsign Airline Flights Last seen
AIP8941 - 28 2026-07-05
AIP8902 - 14 2026-07-09
AIP8943 - 6 2026-07-04
AIP8933 Alpine Air Express 5 2026-04-30
AIP626 - 4 2026-06-26
AIP23 - 4 2026-04-18
AIP8934 Alpine Air Express 3 2026-05-01
AIP639 - 3 2026-07-01
AIP628 - 3 2026-06-22
AIP614 - 3 2026-06-13
AIP635 - 2 2026-06-27
AIP610 Alpine Air Express 2 2026-06-11
AIP475 Alpine Air Express 2 2026-05-01
AIP432 Alpine Air Express 2 2026-04-21
AIP357 Alpine Air Express 2 2026-04-23
AIP9900 Alpine Air Express 1 2026-06-09
AIP437 Alpine Air Express 1 2026-04-25
AIP422 Alpine Air Express 1 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 AIP8902 - Jul 9, 02:05 UTCJul 9, 03:55 UTC1h 50m
2026-07-09 AIP8902 - Jul 9, 00:15 UTCJul 9, 01:15 UTC1h 0m
2026-07-08 AIP8902 - Jul 8, 22:00 UTCJul 8, 23:35 UTC1h 35m
2026-07-08 AIP8902 - Jul 8, 19:40 UTCJul 8, 21:20 UTC1h 40m
2026-07-08 AIP8902 SUS → LCK Jul 8, 17:25 UTCJul 8, 18:25 UTC1h 0m
2026-07-05 AIP8941 - Jul 5, 01:15 UTCJul 5, 04:25 UTC3h 10m
2026-07-04 AIP8941 - Jul 4, 23:00 UTCJul 5, 00:25 UTC1h 25m
2026-07-04 AIP8943 - Jul 4, 18:35 UTCJul 4, 22:00 UTC3h 25m
2026-07-04 AIP8943 - Jul 4, 15:25 UTCJul 4, 17:00 UTC1h 35m
2026-07-04 AIP8941 - Jul 4, 01:30 UTCJul 4, 05:10 UTC3h 40m
2026-07-03 AIP8941 - Jul 3, 23:20 UTCJul 4, 00:45 UTC1h 25m
2026-07-03 AIP8943 - Jul 3, 18:05 UTCJul 3, 21:50 UTC3h 45m
2026-07-02 AIP8941 - Jul 2, 19:50 UTCJul 2, 21:25 UTC1h 35m
2026-07-01 AIP639 - Jul 1, 10:25 UTCJul 1, 12:25 UTC2h 0m
2026-07-01 AIP639 - Jul 1, 09:00 UTCJul 1, 09:45 UTC45m
2026-07-01 AIP639 - Jul 1, 03:35 UTCJul 1, 06:50 UTC3h 15m
2026-06-30 AIP8941 - Jun 30, 01:09 UTCJun 30, 04:35 UTC3h 26m
2026-06-29 AIP8941 - Jun 29, 22:55 UTCJun 30, 00:35 UTC1h 40m
2026-06-29 AIP8941 - Jun 29, 17:19 UTCJun 29, 19:44 UTC2h 25m
2026-06-27 AIP635 - Jun 27, 21:44 UTCJun 28, 01:59 UTC4h 15m
2026-06-27 AIP635 - Jun 27, 17:39 UTCJun 27, 19:49 UTC2h 10m
2026-06-26 AIP626 - Jun 26, 01:45 UTCJun 26, 04:00 UTC2h 15m
2026-06-25 AIP626 - Jun 25, 21:59 UTCJun 26, 00:15 UTC2h 15m
2026-06-25 AIP626 - Jun 25, 18:50 UTCJun 25, 21:35 UTC2h 45m
2026-06-24 AIP626 - Jun 24, 20:05 UTCJun 24, 21:50 UTC1h 45m
2026-06-22 AIP628 - Jun 22, 23:05 UTCJun 22, 23:55 UTC50m
2026-06-22 AIP628 - Jun 22, 20:14 UTCJun 22, 22:10 UTC1h 55m
2026-06-22 AIP628 - Jun 22, 17:20 UTCJun 22, 18:54 UTC1h 35m
2026-06-22 AIP8941 AZO → IND Jun 22, 03:45 UTCJun 22, 05:29 UTC1h 45m
2026-06-22 AIP8941 - Jun 22, 01:49 UTCJun 22, 03:40 UTC1h 50m
2026-06-21 AIP8941 - Jun 21, 23:30 UTCJun 22, 01:00 UTC1h 30m
2026-06-21 AIP8941 - Jun 21, 17:39 UTCJun 21, 19:29 UTC1h 50m
2026-06-17 AIP8941 - Jun 17, 01:35 UTCJun 17, 04:45 UTC3h 10m
2026-06-16 AIP8941 - Jun 16, 23:45 UTCJun 17, 01:00 UTC1h 15m
2026-06-16 AIP8941 - Jun 16, 20:05 UTCJun 16, 21:40 UTC1h 35m
2026-06-15 AIP8941 - Jun 15, 05:20 UTCJun 15, 06:04 UTC45m
2026-06-14 AIP8941 - Jun 14, 23:10 UTCJun 15, 03:35 UTC4h 25m
2026-06-13 AIP614 - Jun 13, 03:20 UTCJun 13, 03:55 UTC35m
2026-06-13 AIP614 - Jun 13, 01:10 UTCJun 13, 02:50 UTC1h 40m
2026-06-12 AIP614 - Jun 12, 23:30 UTCJun 12, 23:40 UTC10m
2026-06-12 AIP8941 PIB → GDC Jun 12, 17:30 UTCJun 12, 18:25 UTC55m
2026-06-12 AIP8941 PIB → GDC Jun 12, 14:05 UTCJun 12, 16:50 UTC2h 45m
2026-06-11 AIP8941 PIB → GDC Jun 11, 23:30 UTCJun 12, 01:05 UTC1h 35m
2026-06-11 AIP8941 PIB → GDC Jun 11, 20:25 UTCJun 11, 22:10 UTC1h 45m
2026-06-11 AIP610 ADS → MMU Jun 11, 03:45 UTCJun 11, 06:20 UTC2h 35m
2026-06-10 AIP610 ADS → MMU Jun 10, 21:05 UTCJun 11, 02:10 UTC5h 5m
2026-06-09 AIP9900 HLN → BIL Jun 9, 20:35 UTCJun 9, 23:45 UTC3h 10m
2026-05-01 AIP475 GDC → IND May 1, 13:00 UTCMay 1, 16:05 UTC3h 5m
2026-05-01 AIP8934 MHT → BTV May 1, 11:30 UTCMay 1, 12:00 UTC30m
2026-04-30 AIP8933 BTV → MHT Apr 30, 23:05 UTCApr 30, 23:40 UTC35m

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 N149SF page for operator, model, and routing details .

Mode-S A0C5B5 frequently asked

What is Mode-S code A0C5B5?
A0C5B5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N149SF.
Where is Mode-S A0C5B5 registered?
Mode-S code A0C5B5 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 A0C5B5 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0C5B5, octal 50142665, decimal 10,536,373.
What flights does A0C5B5 operate?
Mode-S A0C5B5 has broadcast 18 distinct callsigns, including AIP8941, AIP8902, AIP8943, AIP8933, AIP626.