Apparatus

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sensors Mode-S transponder

A0DBF2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1544C · CESSNA 172 Skyhawk · operated by ELITE APPROACH LLC

Hex
A0DBF2
Octal
50155762
Decimal
10,542,066
Country
US
Tail
N1544C
Type
C172
No current signal · last broadcast 27m ago
Flights observed
192
Distinct callsigns
1
Country
US
Last broadcast
27m ago

Last known position

Most recent position reported by Mode-S A0DBF2.

Country allocation

The ICAO 24-bit address A0DBF2 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
N1544C - 192 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N1544C SUS → SUS Jul 14, 13:40 UTCJul 14, 14:30 UTC50m
2026-07-13 N1544C SUS → SUS Jul 13, 22:35 UTCJul 14, 00:05 UTC1h 30m
2026-07-13 N1544C - Jul 13, 19:00 UTCJul 13, 19:45 UTC45m
2026-07-13 N1544C - Jul 13, 17:25 UTCJul 13, 18:00 UTC35m
2026-07-13 N1544C SUS → SUS Jul 13, 15:45 UTCJul 13, 16:35 UTC50m
2026-07-10 N1544C - Jul 10, 13:40 UTCJul 10, 14:20 UTC40m
2026-07-09 N1544C SUS → SUS Jul 9, 19:40 UTCJul 9, 20:30 UTC50m
2026-07-09 N1544C SUS → SUS Jul 9, 17:50 UTCJul 9, 18:50 UTC1h 0m
2026-07-09 N1544C SUS → SUS Jul 9, 15:45 UTCJul 9, 16:45 UTC1h 0m
2026-07-09 N1544C - Jul 9, 13:45 UTCJul 9, 14:40 UTC55m
2026-07-09 N1544C - Jul 9, 03:35 UTCJul 9, 04:00 UTC25m
2026-07-09 N1544C - Jul 9, 01:55 UTCJul 9, 02:35 UTC40m
2026-07-08 N1544C SUS → SUS Jul 8, 22:00 UTCJul 8, 22:40 UTC40m
2026-07-08 N1544C SUS → SUS Jul 8, 17:40 UTCJul 8, 18:50 UTC1h 10m
2026-07-08 N1544C SUS → SUS Jul 8, 15:50 UTCJul 8, 16:30 UTC40m
2026-07-08 N1544C - Jul 8, 12:55 UTCJul 8, 13:10 UTC15m
2026-07-03 N1544C - Jul 3, 19:30 UTCJul 3, 20:25 UTC55m
2026-07-03 N1544C - Jul 3, 13:50 UTCJul 3, 14:45 UTC55m
2026-07-02 N1544C SUS → SUS Jul 2, 21:45 UTCJul 2, 22:40 UTC55m
2026-07-02 N1544C - Jul 2, 19:50 UTCJul 2, 20:45 UTC55m
2026-07-02 N1544C SUS → SUS Jul 2, 17:45 UTCJul 2, 18:45 UTC1h 0m
2026-07-02 N1544C - Jul 2, 13:40 UTCJul 2, 14:40 UTC1h 0m
2026-07-01 N1544C - Jul 1, 16:05 UTCJul 1, 16:30 UTC25m
2026-07-01 N1544C - Jul 1, 13:35 UTCJul 1, 14:15 UTC40m
2026-06-30 N1544C SUS → SUS Jun 30, 23:35 UTCJul 1, 00:45 UTC1h 10m
2026-06-30 N1544C - Jun 30, 22:05 UTCJun 30, 22:50 UTC45m
2026-06-30 N1544C - Jun 30, 19:00 UTCJun 30, 19:50 UTC50m
2026-06-30 N1544C - Jun 30, 14:05 UTCJun 30, 15:15 UTC1h 10m
2026-06-30 N1544C SUS → SUS Jun 30, 13:05 UTCJun 30, 13:25 UTC20m
2026-06-29 N1544C SUS → SUS Jun 29, 17:40 UTCJun 29, 18:34 UTC55m
2026-06-29 N1544C - Jun 29, 15:45 UTCJun 29, 16:55 UTC1h 10m
2026-06-29 N1544C - Jun 29, 13:30 UTCJun 29, 14:39 UTC1h 10m
2026-06-29 N1544C - Jun 29, 11:45 UTCJun 29, 12:39 UTC55m
2026-06-24 N1544C SUS → SUS Jun 24, 19:44 UTCJun 24, 20:14 UTC30m
2026-06-24 N1544C - Jun 24, 17:40 UTCJun 24, 18:55 UTC1h 15m
2026-06-24 N1544C - Jun 24, 15:39 UTCJun 24, 16:50 UTC1h 10m
2026-06-24 N1544C SUS → SUS Jun 24, 13:40 UTCJun 24, 14:15 UTC35m
2026-06-23 N1544C - Jun 23, 23:19 UTCJun 24, 00:49 UTC1h 30m
2026-06-23 N1544C SUS → SUS Jun 23, 21:54 UTCJun 23, 22:40 UTC45m
2026-06-23 N1544C - Jun 23, 17:59 UTCJun 23, 19:44 UTC1h 45m
2026-06-23 N1544C - Jun 23, 15:40 UTCJun 23, 16:59 UTC1h 20m
2026-06-22 N1544C SUS → SUS Jun 22, 19:34 UTCJun 22, 21:00 UTC1h 25m
2026-06-21 N1544C - Jun 21, 02:30 UTCJun 21, 03:25 UTC55m
2026-06-20 N1544C - Jun 20, 23:10 UTCJun 20, 23:45 UTC35m
2026-06-20 N1544C - Jun 20, 19:29 UTCJun 20, 20:09 UTC40m
2026-06-20 N1544C - Jun 20, 15:54 UTCJun 20, 16:29 UTC35m
2026-06-20 N1544C - Jun 20, 00:09 UTCJun 20, 00:34 UTC25m
2026-06-19 N1544C - Jun 19, 21:49 UTCJun 19, 22:19 UTC30m
2026-06-19 N1544C SUS → SUS Jun 19, 18:14 UTCJun 19, 18:39 UTC25m
2026-06-18 N1544C SUS → SUS Jun 18, 12:05 UTCJun 18, 12:40 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 N1544C page for operator, model, and routing details .

Mode-S A0DBF2 frequently asked

What is Mode-S code A0DBF2?
A0DBF2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1544C.
Where is Mode-S A0DBF2 registered?
Mode-S code A0DBF2 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 A0DBF2 broadcasting right now?
No active broadcast right now. Last signal was 27m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0DBF2, octal 50155762, decimal 10,542,066.
What flights does A0DBF2 operate?
Mode-S A0DBF2 has broadcast 1 distinct callsign, including N1544C.