Apparatus

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sensors Mode-S transponder

A0ABAF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N142SA · DE HAVILLAND DHC-6 Twin Otter · operated by MONARCH ENTERPRISES INC

Hex
A0ABAF
Octal
50125657
Decimal
10,529,711
Country
US
Tail
N142SA
Type
DHC6
No current signal · last broadcast 7h ago
Flights observed
157
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A0ABAF.

Country allocation

The ICAO 24-bit address A0ABAF 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
CVU42 - 157 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 CVU42 - Jul 4, 20:25 UTCJul 4, 20:50 UTC25m
2026-07-04 CVU42 - Jul 4, 19:20 UTCJul 4, 19:45 UTC25m
2026-07-04 CVU42 - Jul 4, 17:00 UTCJul 4, 17:30 UTC30m
2026-07-04 CVU42 - Jul 4, 15:00 UTCJul 4, 15:25 UTC25m
2026-07-01 CVU42 - Jul 1, 20:20 UTCJul 1, 20:55 UTC35m
2026-07-01 CVU42 - Jul 1, 13:45 UTCJul 1, 14:15 UTC30m
2026-06-30 CVU42 - Jun 30, 21:40 UTCJun 30, 22:00 UTC20m
2026-06-30 CVU42 - Jun 30, 16:25 UTCJun 30, 16:45 UTC20m
2026-06-30 CVU42 - Jun 30, 14:40 UTCJun 30, 15:40 UTC1h 0m
2026-06-29 CVU42 - Jun 29, 21:50 UTCJun 29, 22:10 UTC20m
2026-06-29 CVU42 - Jun 29, 16:39 UTCJun 29, 17:10 UTC30m
2026-06-29 CVU42 - Jun 29, 14:54 UTCJun 29, 15:54 UTC1h 0m
2026-06-28 CVU42 - Jun 28, 16:55 UTCJun 28, 17:19 UTC25m
2026-06-28 CVU42 - Jun 28, 15:44 UTCJun 28, 16:09 UTC25m
2026-06-27 CVU42 - Jun 27, 17:14 UTCJun 27, 17:44 UTC30m
2026-06-27 CVU42 - Jun 27, 14:45 UTCJun 27, 16:39 UTC1h 55m
2026-06-25 CVU42 - Jun 25, 21:50 UTCJun 25, 22:10 UTC20m
2026-06-25 CVU42 - Jun 25, 20:09 UTCJun 25, 20:25 UTC15m
2026-06-25 CVU42 - Jun 25, 19:09 UTCJun 25, 19:34 UTC25m
2026-06-25 CVU42 - Jun 25, 16:55 UTCJun 25, 17:20 UTC25m
2026-06-25 CVU42 - Jun 25, 14:50 UTCJun 25, 15:54 UTC1h 5m
2026-06-25 CVU42 - Jun 25, 00:29 UTCJun 25, 00:59 UTC30m
2026-06-24 CVU42 - Jun 24, 19:00 UTCJun 24, 19:29 UTC30m
2026-06-24 CVU42 - Jun 24, 17:45 UTCJun 24, 17:59 UTC15m
2026-06-24 CVU42 - Jun 24, 16:34 UTCJun 24, 16:59 UTC25m
2026-06-24 CVU42 - Jun 24, 14:39 UTCJun 24, 15:39 UTC1h 0m
2026-06-24 CVU42 - Jun 24, 01:19 UTCJun 24, 01:44 UTC25m
2026-06-23 CVU42 - Jun 23, 22:44 UTCJun 23, 23:10 UTC25m
2026-06-23 CVU42 - Jun 23, 21:45 UTCJun 23, 22:05 UTC20m
2026-06-23 CVU42 - Jun 23, 16:29 UTCJun 23, 16:54 UTC25m
2026-06-22 CVU42 - Jun 22, 22:49 UTCJun 22, 23:45 UTC55m
2026-06-22 CVU42 - Jun 22, 20:30 UTCJun 22, 21:00 UTC30m
2026-06-22 CVU42 - Jun 22, 19:14 UTCJun 22, 19:44 UTC30m
2026-06-22 CVU42 - Jun 22, 18:04 UTCJun 22, 18:35 UTC30m
2026-06-22 CVU42 - Jun 22, 13:39 UTCJun 22, 14:05 UTC25m
2026-06-21 CVU42 - Jun 21, 14:54 UTCJun 21, 15:05 UTC10m
2026-06-19 CVU42 - Jun 19, 20:19 UTCJun 19, 20:49 UTC30m
2026-06-19 CVU42 - Jun 19, 19:09 UTCJun 19, 19:34 UTC25m
2026-06-19 CVU42 - Jun 19, 16:49 UTCJun 19, 17:19 UTC30m
2026-06-19 CVU42 - Jun 19, 15:04 UTCJun 19, 16:04 UTC1h 0m
2026-06-18 CVU42 - Jun 18, 19:20 UTCJun 18, 19:40 UTC20m
2026-06-18 CVU42 - Jun 18, 18:20 UTCJun 18, 18:40 UTC20m
2026-06-18 CVU42 - Jun 18, 15:00 UTCJun 18, 16:10 UTC1h 10m
2026-06-17 CVU42 - Jun 17, 22:00 UTCJun 17, 22:25 UTC25m
2026-06-17 CVU42 - Jun 17, 21:10 UTCJun 17, 21:30 UTC20m
2026-06-17 CVU42 - Jun 17, 20:05 UTCJun 17, 20:30 UTC25m
2026-06-17 CVU42 - Jun 17, 16:40 UTCJun 17, 17:45 UTC1h 5m
2026-06-17 CVU42 - Jun 17, 01:10 UTCJun 17, 01:35 UTC25m
2026-06-16 CVU42 - Jun 16, 22:25 UTCJun 16, 23:00 UTC35m
2026-06-16 CVU42 - Jun 16, 20:50 UTCJun 16, 21:15 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 N142SA page for operator, model, and routing details .

Mode-S A0ABAF frequently asked

What is Mode-S code A0ABAF?
A0ABAF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N142SA.
Where is Mode-S A0ABAF registered?
Mode-S code A0ABAF 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 A0ABAF broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0ABAF, octal 50125657, decimal 10,529,711.
What flights does A0ABAF operate?
Mode-S A0ABAF has broadcast 1 distinct callsign, including CVU42.