Apparatus

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sensors Mode-S transponder

A709DC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N55246 · CESSNA 172 Skyhawk · operated by KADENA AERO CLUB

Hex
A709DC
Octal
51604734
Decimal
10,947,036
Country
US
Tail
N55246
Type
C172
No current signal · last broadcast 5h ago
Flights observed
104
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A709DC.

Country allocation

The ICAO 24-bit address A709DC 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
N55246 - 104 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N55246 DNA → DNA Jul 14, 09:05 UTCJul 14, 09:35 UTC30m
2026-07-14 N55246 - Jul 14, 05:20 UTCJul 14, 06:20 UTC1h 0m
2026-07-14 N55246 - Jul 14, 00:30 UTCJul 14, 01:30 UTC1h 0m
2026-07-13 N55246 DNA → DNA Jul 13, 21:55 UTCJul 13, 22:40 UTC45m
2026-07-13 N55246 DNA → DNA Jul 13, 08:10 UTCJul 13, 08:30 UTC20m
2026-07-13 N55246 - Jul 13, 02:15 UTCJul 13, 02:45 UTC30m
2026-07-08 N55246 - Jul 8, 08:30 UTCJul 8, 09:20 UTC50m
2026-07-08 N55246 - Jul 8, 03:45 UTCJul 8, 04:45 UTC1h 0m
2026-07-07 N55246 - Jul 7, 23:55 UTCJul 8, 00:30 UTC35m
2026-07-07 N55246 - Jul 7, 08:50 UTCJul 7, 09:30 UTC40m
2026-07-07 N55246 - Jul 7, 05:50 UTCJul 7, 06:25 UTC35m
2026-07-07 N55246 DNA → DNA Jul 7, 03:20 UTCJul 7, 04:35 UTC1h 15m
2026-07-06 N55246 - Jul 6, 23:55 UTCJul 7, 00:35 UTC40m
2026-07-06 N55246 - Jul 6, 09:40 UTCJul 6, 09:55 UTC15m
2026-07-06 N55246 - Jul 6, 00:45 UTCJul 6, 01:35 UTC50m
2026-07-05 N55246 - Jul 5, 07:30 UTCJul 5, 07:55 UTC25m
2026-07-05 N55246 - Jul 5, 05:35 UTCJul 5, 05:50 UTC15m
2026-07-04 N55246 - Jul 4, 23:50 UTCJul 5, 00:40 UTC50m
2026-07-04 N55246 DNA → DNA Jul 4, 21:45 UTCJul 4, 22:50 UTC1h 5m
2026-07-04 N55246 DNA → DNA Jul 4, 08:40 UTCJul 4, 09:30 UTC50m
2026-07-04 N55246 DNA → DNA Jul 4, 06:50 UTCJul 4, 07:35 UTC45m
2026-07-03 N55246 - Jul 3, 23:55 UTCJul 4, 00:45 UTC50m
2026-07-03 N55246 - Jul 3, 21:40 UTCJul 3, 22:35 UTC55m
2026-07-03 N55246 - Jul 3, 05:15 UTCJul 3, 05:45 UTC30m
2026-07-03 N55246 - Jul 3, 02:40 UTCJul 3, 03:35 UTC55m
2026-07-02 N55246 DNA → DNA Jul 2, 21:55 UTCJul 2, 22:05 UTC10m
2026-07-02 N55246 - Jul 2, 08:35 UTCJul 2, 09:30 UTC55m
2026-07-02 N55246 DNA → DNA Jul 2, 05:50 UTCJul 2, 06:30 UTC40m
2026-07-02 N55246 DNA → DNA Jul 2, 03:55 UTCJul 2, 04:40 UTC45m
2026-07-01 N55246 DNA → DNA Jul 1, 22:15 UTCJul 1, 23:40 UTC1h 25m
2026-05-21 N55246 - May 21, 01:15 UTCMay 21, 01:25 UTC10m
2026-05-20 N55246 - May 20, 09:05 UTCMay 20, 09:55 UTC50m
2026-05-20 N55246 - May 20, 02:30 UTCMay 20, 03:30 UTC1h 0m
2026-05-19 N55246 DNA → DNA May 19, 23:45 UTCMay 20, 00:50 UTC1h 5m
2026-05-19 N55246 - May 19, 05:10 UTCMay 19, 05:35 UTC25m
2026-05-15 N55246 - May 15, 21:50 UTCMay 15, 22:40 UTC50m
2026-05-15 N55246 - May 15, 08:20 UTCMay 15, 09:25 UTC1h 5m
2026-05-15 N55246 - May 15, 06:45 UTCMay 15, 07:00 UTC15m
2026-05-15 N55246 DNA → DNA May 15, 01:45 UTCMay 15, 02:40 UTC55m
2026-05-14 N55246 - May 14, 08:10 UTCMay 14, 09:00 UTC50m
2026-05-13 N55246 - May 13, 08:15 UTCMay 13, 09:00 UTC45m
2026-05-13 N55246 DNA → DNA May 13, 05:35 UTCMay 13, 06:30 UTC55m
2026-05-13 N55246 - May 13, 02:55 UTCMay 13, 03:55 UTC1h 0m
2026-05-13 N55246 DNA → DNA May 13, 01:05 UTCMay 13, 01:30 UTC25m
2026-05-07 N55246 DNA → DNA May 7, 23:55 UTCMay 8, 00:54 UTC1h 0m
2026-05-07 N55246 DNA → DNA May 7, 08:50 UTCMay 7, 09:35 UTC45m
2026-05-07 N55246 - May 7, 01:05 UTCMay 7, 01:40 UTC35m
2026-05-06 N55246 - May 6, 22:35 UTCMay 6, 23:30 UTC55m
2026-05-03 N55246 - May 3, 03:50 UTCMay 3, 04:30 UTC40m
2026-05-02 N55246 - May 2, 22:10 UTCMay 2, 22:40 UTC30m

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 N55246 page for operator, model, and routing details .

Mode-S A709DC frequently asked

What is Mode-S code A709DC?
A709DC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N55246.
Where is Mode-S A709DC registered?
Mode-S code A709DC 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 A709DC broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A709DC, octal 51604734, decimal 10,947,036.
What flights does A709DC operate?
Mode-S A709DC has broadcast 1 distinct callsign, including N55246.