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sensors Mode-S transponder

A6544C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N507DR · CESSNA 172 Skyhawk · operated by ORTEGA AVIATION SERVICES LLC

Hex
A6544C
Octal
51452114
Decimal
10,900,556
Country
US
Tail
N507DR
Type
C172
No current signal · last broadcast 3h ago
Flights observed
94
Distinct callsigns
1
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A6544C.

Country allocation

The ICAO 24-bit address A6544C 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
N507DR - 94 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N507DR - Jul 14, 13:40 UTCJul 14, 14:00 UTC20m
2026-07-14 N507DR - Jul 14, 11:30 UTCJul 14, 12:45 UTC1h 15m
2026-07-14 N507DR - Jul 14, 03:20 UTCJul 14, 03:55 UTC35m
2026-07-13 N507DR - Jul 13, 19:15 UTCJul 13, 20:10 UTC55m
2026-07-13 N507DR - Jul 13, 01:01 UTCJul 13, 02:05 UTC1h 5m
2026-07-12 N507DR - Jul 12, 22:00 UTCJul 12, 22:50 UTC50m
2026-07-12 N507DR - Jul 12, 17:55 UTCJul 12, 19:15 UTC1h 20m
2026-07-12 N507DR - Jul 12, 16:01 UTCJul 12, 17:15 UTC1h 15m
2026-07-11 N507DR - Jul 11, 19:45 UTCJul 11, 21:30 UTC1h 45m
2026-07-11 N507DR - Jul 11, 16:55 UTCJul 11, 17:15 UTC20m
2026-07-11 N507DR - Jul 11, 15:35 UTCJul 11, 16:05 UTC30m
2026-07-11 N507DR - Jul 11, 01:05 UTCJul 11, 01:55 UTC50m
2026-07-10 N507DR - Jul 10, 22:45 UTCJul 11, 00:00 UTC1h 15m
2026-07-10 N507DR - Jul 10, 18:05 UTCJul 10, 19:05 UTC1h 0m
2026-07-09 N507DR - Jul 9, 22:40 UTCJul 10, 00:50 UTC2h 10m
2026-07-09 N507DR - Jul 9, 21:30 UTCJul 9, 21:55 UTC25m
2026-07-09 N507DR - Jul 9, 20:25 UTCJul 9, 20:55 UTC30m
2026-07-09 N507DR ICT → ICT Jul 9, 18:00 UTCJul 9, 19:05 UTC1h 5m
2026-07-09 N507DR ICT → ICT Jul 9, 15:45 UTCJul 9, 16:55 UTC1h 10m
2026-07-09 N507DR ICT → ICT Jul 9, 11:45 UTCJul 9, 12:55 UTC1h 10m
2026-07-09 N507DR - Jul 9, 00:55 UTCJul 9, 01:35 UTC40m
2026-07-08 N507DR - Jul 8, 22:50 UTCJul 8, 23:15 UTC25m
2026-07-08 N507DR - Jul 8, 21:45 UTCJul 8, 22:20 UTC35m
2026-07-08 N507DR - Jul 8, 18:20 UTCJul 8, 18:50 UTC30m
2026-06-19 N507DR - Jun 19, 12:49 UTCJun 19, 13:14 UTC25m
2026-06-19 N507DR - Jun 19, 11:14 UTCJun 19, 11:59 UTC45m
2026-06-18 N507DR - Jun 18, 00:45 UTCJun 18, 01:30 UTC45m
2026-06-17 N507DR - Jun 17, 22:15 UTCJun 17, 23:30 UTC1h 15m
2026-06-17 N507DR - Jun 17, 21:05 UTCJun 17, 21:15 UTC10m
2026-06-17 N507DR - Jun 17, 00:45 UTCJun 17, 01:00 UTC15m
2026-06-16 N507DR - Jun 16, 22:30 UTCJun 16, 23:50 UTC1h 20m
2026-06-16 N507DR - Jun 16, 19:45 UTCJun 16, 21:15 UTC1h 31m
2026-06-16 N507DR - Jun 16, 17:15 UTCJun 16, 17:59 UTC45m
2026-06-16 N507DR - Jun 16, 15:15 UTCJun 16, 15:50 UTC35m
2026-06-12 N507DR - Jun 12, 20:20 UTCJun 12, 20:50 UTC30m
2026-06-12 N507DR - Jun 12, 19:05 UTCJun 12, 19:25 UTC20m
2026-06-12 N507DR - Jun 12, 17:20 UTCJun 12, 17:30 UTC10m
2026-06-10 N507DR - Jun 10, 22:45 UTCJun 11, 00:35 UTC1h 50m
2026-06-09 N507DR - Jun 9, 22:10 UTCJun 9, 23:30 UTC1h 20m
2026-06-08 N507DR - Jun 8, 22:50 UTCJun 8, 23:15 UTC25m
2026-06-04 N507DR - Jun 4, 22:55 UTCJun 4, 23:40 UTC45m
2026-06-01 N507DR - Jun 1, 22:30 UTCJun 1, 23:10 UTC40m
2026-06-01 N507DR - Jun 1, 20:55 UTCJun 1, 21:35 UTC40m
2026-06-01 N507DR - Jun 1, 18:55 UTCJun 1, 20:20 UTC1h 25m
2026-05-29 N507DR ICT → ICT May 29, 23:50 UTCMay 30, 00:35 UTC45m
2026-05-29 N507DR - May 29, 21:50 UTCMay 29, 22:50 UTC1h 0m
2026-05-29 N507DR - May 29, 20:30 UTCMay 29, 20:45 UTC15m
2026-05-29 N507DR - May 29, 11:20 UTCMay 29, 11:45 UTC25m
2026-05-28 N507DR - May 28, 01:20 UTCMay 28, 02:00 UTC40m
2026-05-27 N507DR ICT → ICT May 27, 22:30 UTCMay 27, 23:20 UTC50m

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 N507DR page for operator, model, and routing details .

Mode-S A6544C frequently asked

What is Mode-S code A6544C?
A6544C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N507DR.
Where is Mode-S A6544C registered?
Mode-S code A6544C 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 A6544C broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6544C, octal 51452114, decimal 10,900,556.
What flights does A6544C operate?
Mode-S A6544C has broadcast 1 distinct callsign, including N507DR.