Apparatus

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sensors Mode-S transponder

A67A53

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N51616 · CESSNA 172 Skyhawk · operated by STARDUST AVIATION LLC

Hex
A67A53
Octal
51475123
Decimal
10,910,291
Country
US
Tail
N51616
Type
C172
No current signal · last broadcast 17h ago
Flights observed
103
Distinct callsigns
1
Country
US
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S A67A53.

Country allocation

The ICAO 24-bit address A67A53 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
N51616 - 103 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N51616 - Jul 17, 19:15 UTCJul 17, 20:29 UTC1h 15m
2026-07-17 N51616 - Jul 17, 16:04 UTCJul 17, 17:20 UTC1h 15m
2026-07-12 N51616 FRG → FRG Jul 12, 17:10 UTCJul 12, 18:20 UTC1h 10m
2026-07-09 N51616 FRG → FRG Jul 9, 16:55 UTCJul 9, 18:00 UTC1h 5m
2026-07-08 N51616 - Jul 8, 21:05 UTCJul 8, 21:45 UTC40m
2026-07-08 N51616 - Jul 8, 15:50 UTCJul 8, 16:30 UTC40m
2026-07-05 N51616 FRG → FRG Jul 5, 19:10 UTCJul 5, 19:40 UTC30m
2026-07-05 N51616 - Jul 5, 18:05 UTCJul 5, 18:40 UTC35m
2026-07-05 N51616 - Jul 5, 16:50 UTCJul 5, 17:25 UTC35m
2026-07-02 N51616 - Jul 2, 14:25 UTCJul 2, 15:30 UTC1h 5m
2026-07-02 N51616 - Jul 2, 13:20 UTCJul 2, 13:50 UTC30m
2026-07-01 N51616 - Jul 1, 17:45 UTCJul 1, 19:20 UTC1h 35m
2026-07-01 N51616 FRG → FRG Jul 1, 15:45 UTCJul 1, 17:05 UTC1h 20m
2026-06-28 N51616 - Jun 28, 19:04 UTCJun 28, 19:49 UTC45m
2026-06-28 N51616 - Jun 28, 18:00 UTCJun 28, 18:29 UTC30m
2026-06-28 N51616 - Jun 28, 16:55 UTCJun 28, 17:25 UTC30m
2026-06-28 N51616 - Jun 28, 15:20 UTCJun 28, 15:49 UTC30m
2026-06-28 N51616 - Jun 28, 13:29 UTCJun 28, 14:50 UTC1h 20m
2026-06-27 N51616 FRG → FRG Jun 27, 13:20 UTCJun 27, 15:49 UTC2h 30m
2026-06-21 N51616 - Jun 21, 18:54 UTCJun 21, 20:00 UTC1h 5m
2026-06-21 N51616 FRG → FRG Jun 21, 16:54 UTCJun 21, 18:04 UTC1h 10m
2026-06-21 N51616 FRG → FRG Jun 21, 15:30 UTCJun 21, 16:14 UTC45m
2026-06-21 N51616 FRG → FRG Jun 21, 14:30 UTCJun 21, 14:54 UTC25m
2026-06-19 N51616 - Jun 19, 17:09 UTCJun 19, 18:30 UTC1h 20m
2026-06-19 N51616 - Jun 19, 14:39 UTCJun 19, 15:04 UTC25m
2026-06-19 N51616 FRG → FRG Jun 19, 13:29 UTCJun 19, 13:59 UTC30m
2026-06-17 N51616 - Jun 17, 19:10 UTCJun 17, 20:15 UTC1h 5m
2026-06-17 N51616 FRG → FRG Jun 17, 16:45 UTCJun 17, 17:50 UTC1h 5m
2026-06-17 N51616 FRG → FRG Jun 17, 15:20 UTCJun 17, 15:50 UTC30m
2026-06-17 N51616 - Jun 17, 14:25 UTCJun 17, 14:50 UTC25m
2026-06-16 N51616 - Jun 16, 20:25 UTCJun 16, 20:55 UTC30m
2026-06-16 N51616 - Jun 16, 19:10 UTCJun 16, 19:45 UTC35m
2026-06-14 N51616 - Jun 14, 12:30 UTCJun 14, 14:00 UTC1h 30m
2026-06-13 N51616 - Jun 13, 22:50 UTCJun 13, 23:20 UTC30m
2026-06-13 N51616 - Jun 13, 21:50 UTCJun 13, 22:15 UTC25m
2026-06-13 N51616 FRG → FRG Jun 13, 19:45 UTCJun 13, 21:05 UTC1h 20m
2026-06-13 N51616 - Jun 13, 18:00 UTCJun 13, 19:10 UTC1h 10m
2026-06-13 N51616 - Jun 13, 16:15 UTCJun 13, 16:45 UTC30m
2026-06-13 N51616 - Jun 13, 14:00 UTCJun 13, 15:25 UTC1h 25m
2026-06-13 N51616 - Jun 13, 12:30 UTCJun 13, 13:00 UTC30m
2026-06-06 N51616 - Jun 6, 23:15 UTCJun 6, 23:44 UTC30m
2026-06-06 N51616 - Jun 6, 21:54 UTCJun 6, 22:25 UTC30m
2026-06-06 N51616 FRG → FRG Jun 6, 19:14 UTCJun 6, 20:25 UTC1h 10m
2026-06-06 N51616 FRG → FRG Jun 6, 17:19 UTCJun 6, 18:39 UTC1h 20m
2026-06-06 N51616 FRG → FRG Jun 6, 14:40 UTCJun 6, 16:20 UTC1h 40m
2026-06-06 N51616 - Jun 6, 13:34 UTCJun 6, 14:09 UTC35m
2026-06-05 N51616 FRG → FRG Jun 5, 18:00 UTCJun 5, 18:35 UTC35m
2026-06-05 N51616 - Jun 5, 16:50 UTCJun 5, 17:15 UTC25m
2026-06-05 N51616 FRG → FRG Jun 5, 14:40 UTCJun 5, 15:45 UTC1h 5m
2026-06-04 N51616 - Jun 4, 16:55 UTCJun 4, 18:00 UTC1h 5m

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 N51616 page for operator, model, and routing details .

Mode-S A67A53 frequently asked

What is Mode-S code A67A53?
A67A53 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N51616.
Where is Mode-S A67A53 registered?
Mode-S code A67A53 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 A67A53 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A67A53, octal 51475123, decimal 10,910,291.
What flights does A67A53 operate?
Mode-S A67A53 has broadcast 1 distinct callsign, including N51616.