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sensors Mode-S transponder

A71216

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N555AZ · PIPER PA-28-140/150/160/180 · operated by N555AZ LLC

Hex
A71216
Octal
51611026
Decimal
10,949,142
Country
US
Tail
N555AZ
Type
P28A
No current signal · last broadcast 18d ago
Flights observed
96
Distinct callsigns
1
Country
US
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S A71216.

Country allocation

The ICAO 24-bit address A71216 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
N555AZ - 96 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N555AZ - Jul 26, 20:40 UTCJul 26, 21:25 UTC45m
2026-07-26 N555AZ - Jul 26, 16:35 UTCJul 26, 17:30 UTC55m
2026-07-24 N555AZ - Jul 24, 22:15 UTCJul 24, 23:15 UTC1h 0m
2026-07-24 N555AZ - Jul 24, 20:00 UTCJul 24, 20:35 UTC35m
2026-07-23 N555AZ - Jul 23, 18:20 UTCJul 23, 19:40 UTC1h 20m
2026-07-23 N555AZ - Jul 23, 15:20 UTCJul 23, 16:05 UTC45m
2026-07-23 N555AZ - Jul 23, 13:40 UTCJul 23, 14:35 UTC55m
2026-07-23 N555AZ - Jul 23, 03:05 UTCJul 23, 03:15 UTC10m
2026-07-23 N555AZ - Jul 23, 02:10 UTCJul 23, 02:30 UTC20m
2026-07-22 N555AZ - Jul 22, 20:45 UTCJul 22, 21:40 UTC55m
2026-07-22 N555AZ - Jul 22, 15:25 UTCJul 22, 15:50 UTC25m
2026-07-22 N555AZ - Jul 22, 13:50 UTCJul 22, 14:15 UTC25m
2026-07-20 N555AZ - Jul 20, 15:15 UTCJul 20, 15:45 UTC30m
2026-07-20 N555AZ - Jul 20, 13:45 UTCJul 20, 14:25 UTC40m
2026-07-19 N555AZ MNZ → MNZ Jul 19, 20:30 UTCJul 19, 21:20 UTC50m
2026-07-19 N555AZ MNZ → MNZ Jul 19, 15:45 UTCJul 19, 16:55 UTC1h 10m
2026-07-16 N555AZ - Jul 16, 23:25 UTCJul 17, 00:25 UTC1h 0m
2026-07-16 N555AZ - Jul 16, 21:15 UTCJul 16, 22:15 UTC1h 0m
2026-07-16 N555AZ - Jul 16, 18:40 UTCJul 16, 19:45 UTC1h 5m
2026-07-16 N555AZ - Jul 16, 16:05 UTCJul 16, 17:05 UTC1h 0m
2026-07-16 N555AZ MNZ → MNZ Jul 16, 13:54 UTCJul 16, 15:05 UTC1h 10m
2026-07-15 N555AZ - Jul 15, 19:35 UTCJul 15, 22:00 UTC2h 25m
2026-07-15 N555AZ MNZ → MNZ Jul 15, 16:10 UTCJul 15, 17:25 UTC1h 15m
2026-07-15 N555AZ - Jul 15, 00:05 UTCJul 15, 00:55 UTC50m
2026-07-14 N555AZ - Jul 14, 21:05 UTCJul 14, 22:10 UTC1h 5m
2026-07-14 N555AZ - Jul 14, 19:30 UTCJul 14, 20:25 UTC55m
2026-07-14 N555AZ - Jul 14, 13:45 UTCJul 14, 14:50 UTC1h 5m
2026-07-14 N555AZ MNZ → MNZ Jul 14, 01:35 UTCJul 14, 02:30 UTC55m
2026-07-13 N555AZ - Jul 13, 22:30 UTCJul 13, 22:50 UTC20m
2026-07-13 N555AZ - Jul 13, 17:15 UTCJul 13, 17:35 UTC20m
2026-07-11 N555AZ - Jul 11, 18:30 UTCJul 11, 19:15 UTC45m
2026-07-11 N555AZ MNZ → MNZ Jul 11, 00:05 UTCJul 11, 00:55 UTC50m
2026-07-10 N555AZ - Jul 10, 16:35 UTCJul 10, 17:55 UTC1h 20m
2026-07-10 N555AZ - Jul 10, 14:50 UTCJul 10, 15:05 UTC15m
2026-07-10 N555AZ - Jul 10, 13:45 UTCJul 10, 14:00 UTC15m
2026-07-08 N555AZ - Jul 8, 19:05 UTCJul 8, 20:00 UTC55m
2026-07-08 N555AZ - Jul 8, 16:00 UTCJul 8, 18:00 UTC2h 0m
2026-07-05 N555AZ - Jul 5, 20:35 UTCJul 5, 21:20 UTC45m
2026-07-02 N555AZ - Jul 2, 21:45 UTCJul 2, 22:10 UTC25m
2026-07-02 N555AZ - Jul 2, 20:30 UTCJul 2, 21:00 UTC30m
2026-07-02 N555AZ - Jul 2, 18:40 UTCJul 2, 19:45 UTC1h 5m
2026-07-02 N555AZ - Jul 2, 14:15 UTCJul 2, 15:10 UTC55m
2026-07-02 N555AZ - Jul 2, 11:10 UTCJul 2, 12:20 UTC1h 10m
2026-07-02 N555AZ - Jul 2, 01:55 UTCJul 2, 02:15 UTC20m
2026-07-01 N555AZ - Jul 1, 20:55 UTCJul 1, 21:25 UTC30m
2026-07-01 N555AZ MNZ → MNZ Jul 1, 16:10 UTCJul 1, 17:15 UTC1h 5m
2026-07-01 N555AZ - Jul 1, 13:35 UTCJul 1, 14:40 UTC1h 5m
2026-06-30 N555AZ - Jun 30, 22:25 UTCJun 30, 23:10 UTC45m
2026-06-30 N555AZ - Jun 30, 19:50 UTCJun 30, 20:55 UTC1h 5m
2026-06-30 N555AZ MNZ → MNZ Jun 30, 17:50 UTCJun 30, 18:50 UTC1h 0m

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 N555AZ page for operator, model, and routing details .

Mode-S A71216 frequently asked

What is Mode-S code A71216?
A71216 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N555AZ.
Where is Mode-S A71216 registered?
Mode-S code A71216 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 A71216 broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A71216, octal 51611026, decimal 10,949,142.
What flights does A71216 operate?
Mode-S A71216 has broadcast 1 distinct callsign, including N555AZ.