Apparatus

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sensors Mode-S transponder

A72CE1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N561ZA · operated by ZULU AIR LLC

Hex
A72CE1
Octal
51626341
Decimal
10,956,001
Country
US
Tail
N561ZA
No current signal · last broadcast 1d ago
Flights observed
152
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A72CE1.

Country allocation

The ICAO 24-bit address A72CE1 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
N561ZA - 152 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 N561ZA - Jun 15, 19:30 UTCJun 15, 21:14 UTC1h 45m
2026-06-15 N561ZA - Jun 15, 16:49 UTCJun 15, 17:40 UTC50m
2026-06-15 N561ZA - Jun 15, 14:24 UTCJun 15, 14:50 UTC25m
2026-06-14 N561ZA - Jun 14, 22:50 UTCJun 14, 23:15 UTC25m
2026-06-14 N561ZA - Jun 14, 20:55 UTCJun 14, 21:45 UTC50m
2026-06-14 N561ZA - Jun 14, 18:10 UTCJun 14, 18:40 UTC30m
2026-06-13 N561ZA - Jun 13, 19:30 UTCJun 13, 20:00 UTC30m
2026-06-13 N561ZA - Jun 13, 14:10 UTCJun 13, 14:50 UTC40m
2026-06-13 N561ZA - Jun 13, 12:50 UTCJun 13, 13:05 UTC15m
2026-06-12 N561ZA - Jun 12, 15:40 UTCJun 12, 16:05 UTC25m
2026-06-12 N561ZA - Jun 12, 13:20 UTCJun 12, 14:25 UTC1h 5m
2026-06-11 N561ZA - Jun 11, 22:15 UTCJun 11, 23:05 UTC50m
2026-06-11 N561ZA - Jun 11, 20:50 UTCJun 11, 21:15 UTC25m
2026-06-11 N561ZA - Jun 11, 18:05 UTCJun 11, 19:00 UTC55m
2026-06-11 N561ZA - Jun 11, 16:35 UTCJun 11, 17:05 UTC30m
2026-06-10 N561ZA - Jun 10, 14:45 UTCJun 10, 15:15 UTC30m
2026-06-10 N561ZA - Jun 10, 12:35 UTCJun 10, 13:40 UTC1h 5m
2026-06-09 N561ZA - Jun 9, 16:45 UTCJun 9, 23:05 UTC6h 20m
2026-06-09 N561ZA - Jun 9, 13:05 UTCJun 9, 13:30 UTC25m
2026-06-07 N561ZA - Jun 7, 22:40 UTCJun 7, 23:05 UTC25m
2026-06-07 N561ZA - Jun 7, 21:00 UTCJun 7, 21:30 UTC30m
2026-06-07 N561ZA - Jun 7, 19:20 UTCJun 7, 19:45 UTC25m
2026-06-07 N561ZA - Jun 7, 18:00 UTCJun 7, 18:20 UTC20m
2026-06-07 N561ZA - Jun 7, 16:40 UTCJun 7, 16:55 UTC15m
2026-06-06 N561ZA - Jun 6, 19:04 UTCJun 6, 20:39 UTC1h 35m
2026-06-06 N561ZA - Jun 6, 17:34 UTCJun 6, 18:19 UTC45m
2026-06-06 N561ZA - Jun 6, 13:54 UTCJun 6, 16:04 UTC2h 10m
2026-06-05 N561ZA - Jun 5, 17:15 UTCJun 5, 17:25 UTC10m
2026-06-05 N561ZA - Jun 5, 12:05 UTCJun 5, 13:10 UTC1h 5m
2026-06-04 N561ZA ORL → SRQ Jun 4, 22:30 UTCJun 4, 23:10 UTC40m
2026-06-04 N561ZA - Jun 4, 20:35 UTCJun 4, 21:30 UTC55m
2026-06-04 N561ZA - Jun 4, 19:15 UTCJun 4, 19:25 UTC10m
2026-06-04 N561ZA - Jun 4, 17:15 UTCJun 4, 17:40 UTC25m
2026-06-02 N561ZA - Jun 2, 18:35 UTCJun 2, 21:20 UTC2h 45m
2026-06-02 N561ZA - Jun 2, 11:10 UTCJun 2, 13:30 UTC2h 20m
2026-06-02 N561ZA - Jun 2, 09:55 UTCJun 2, 10:05 UTC10m
2026-06-01 N561ZA - Jun 1, 18:35 UTCJun 1, 20:00 UTC1h 25m
2026-06-01 N561ZA - Jun 1, 16:00 UTCJun 1, 16:10 UTC10m
2026-06-01 N561ZA - Jun 1, 13:25 UTCJun 1, 13:50 UTC25m
2026-05-31 N561ZA - May 31, 22:05 UTCMay 31, 23:10 UTC1h 5m
2026-05-31 N561ZA - May 31, 19:25 UTCMay 31, 20:25 UTC1h 0m
2026-05-31 N561ZA - May 31, 16:55 UTCMay 31, 17:25 UTC30m
2026-05-31 N561ZA - May 31, 13:30 UTCMay 31, 14:50 UTC1h 20m
2026-05-30 N561ZA - May 30, 21:20 UTCMay 30, 21:40 UTC20m
2026-05-30 N561ZA - May 30, 19:20 UTCMay 30, 19:50 UTC30m
2026-05-30 N561ZA - May 30, 17:25 UTCMay 30, 17:40 UTC15m
2026-05-30 N561ZA - May 30, 15:10 UTCMay 30, 15:55 UTC45m
2026-05-29 N561ZA - May 29, 21:20 UTCMay 29, 23:45 UTC2h 25m
2026-05-29 N561ZA - May 29, 16:30 UTCMay 29, 19:00 UTC2h 30m
2026-05-29 N561ZA - May 29, 14:30 UTCMay 29, 15:45 UTC1h 15m

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 N561ZA page for operator, model, and routing details .

Mode-S A72CE1 frequently asked

What is Mode-S code A72CE1?
A72CE1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N561ZA.
Where is Mode-S A72CE1 registered?
Mode-S code A72CE1 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 A72CE1 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A72CE1, octal 51626341, decimal 10,956,001.
What flights does A72CE1 operate?
Mode-S A72CE1 has broadcast 1 distinct callsign, including N561ZA.