Apparatus

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sensors Mode-S transponder

A9EECE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N739ZW · CESSNA 172 Skyhawk · operated by HOLLADAY AVIATION LLC

Hex
A9EECE
Octal
52367316
Decimal
11,136,718
Country
US
Tail
N739ZW
Type
C172
No current signal · last broadcast 1h ago
Flights observed
115
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A9EECE.

Country allocation

The ICAO 24-bit address A9EECE 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
N739ZW - 113 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N739ZW - Jul 14, 13:45 UTCJul 14, 15:05 UTC1h 20m
2026-07-13 N739ZW - Jul 13, 14:55 UTCJul 13, 15:05 UTC10m
2026-07-13 N739ZW - Jul 13, 14:10 UTCJul 13, 14:20 UTC10m
2026-07-12 N739ZW - Jul 12, 14:35 UTCJul 12, 15:30 UTC55m
2026-07-11 N739ZW - Jul 11, 14:30 UTCJul 11, 15:25 UTC55m
2026-07-10 N739ZW - Jul 10, 14:15 UTCJul 10, 15:35 UTC1h 20m
2026-07-10 N739ZW - Jul 10, 11:50 UTCJul 10, 12:35 UTC45m
2026-07-09 N739ZW - Jul 9, 20:45 UTCJul 9, 20:55 UTC10m
2026-07-09 N739ZW - Jul 9, 15:00 UTCJul 9, 15:25 UTC25m
2026-07-09 N739ZW - Jul 9, 13:40 UTCJul 9, 14:10 UTC30m
2026-07-08 N739ZW - Jul 8, 19:15 UTCJul 8, 19:25 UTC10m
2026-07-08 N739ZW - Jul 8, 17:55 UTCJul 8, 18:35 UTC40m
2026-07-08 N739ZW - Jul 8, 11:55 UTCJul 8, 12:45 UTC50m
2026-07-07 N739ZW - Jul 7, 20:10 UTCJul 7, 20:40 UTC30m
2026-07-07 N739ZW - Jul 7, 13:45 UTCJul 7, 15:05 UTC1h 20m
2026-07-06 N739ZW - Jul 6, 17:50 UTCJul 6, 18:10 UTC20m
2026-07-06 N739ZW - Jul 6, 13:30 UTCJul 6, 14:50 UTC1h 20m
2026-07-05 N739ZW - Jul 5, 17:45 UTCJul 5, 18:10 UTC25m
2026-07-04 N739ZW - Jul 4, 18:40 UTCJul 4, 19:30 UTC50m
2026-07-01 N739ZW - Jul 1, 14:30 UTCJul 1, 15:15 UTC45m
2026-07-01 N739ZW - Jul 1, 12:05 UTCJul 1, 12:40 UTC35m
2026-06-30 N739ZW - Jun 30, 21:15 UTCJun 30, 21:25 UTC10m
2026-06-30 N739ZW - Jun 30, 20:25 UTCJun 30, 20:40 UTC15m
2026-06-30 N739ZW - Jun 30, 00:04 UTCJun 30, 00:20 UTC15m
2026-06-29 N739ZW - Jun 29, 23:05 UTCJun 29, 23:29 UTC25m
2026-06-28 N739ZW - Jun 28, 20:19 UTCJun 28, 20:29 UTC10m
2026-06-28 N739ZW - Jun 28, 17:55 UTCJun 28, 18:25 UTC30m
2026-06-28 N739ZW - Jun 28, 14:39 UTCJun 28, 14:59 UTC20m
2026-06-28 N739ZW CRG → CRG Jun 28, 12:35 UTCJun 28, 13:10 UTC35m
2026-06-27 N739ZW - Jun 27, 20:24 UTCJun 27, 20:55 UTC30m
2026-06-27 N739ZW - Jun 27, 19:00 UTCJun 27, 19:15 UTC15m
2026-06-27 N739ZW - Jun 27, 18:04 UTCJun 27, 18:24 UTC20m
2026-06-27 N739ZW - Jun 27, 14:29 UTCJun 27, 15:10 UTC40m
2026-06-27 N739ZW - Jun 27, 11:59 UTCJun 27, 12:39 UTC40m
2026-06-26 N739ZW - Jun 26, 15:05 UTCJun 26, 15:15 UTC10m
2026-06-24 N739ZW - Jun 24, 12:09 UTCJun 24, 12:54 UTC45m
2026-06-23 N739ZW - Jun 23, 14:25 UTCJun 23, 14:55 UTC30m
2026-06-22 N739ZW - Jun 22, 17:15 UTCJun 22, 17:44 UTC30m
2026-06-22 N739ZW - Jun 22, 12:30 UTCJun 22, 13:14 UTC45m
2026-06-21 N739ZW - Jun 21, 17:50 UTCJun 21, 18:35 UTC45m
2026-06-21 N739ZW - Jun 21, 13:54 UTCJun 21, 15:05 UTC1h 10m
2026-06-20 N739ZW - Jun 20, 20:34 UTCJun 20, 21:00 UTC25m
2026-06-20 N739ZW - Jun 20, 14:24 UTCJun 20, 14:35 UTC10m
2026-06-20 N739ZW - Jun 20, 13:34 UTCJun 20, 13:44 UTC10m
2026-06-17 N739ZW - Jun 17, 13:05 UTCJun 17, 13:15 UTC10m
2026-06-17 N739ZW - Jun 17, 12:20 UTCJun 17, 12:30 UTC10m
2026-06-15 N739ZW - Jun 15, 16:24 UTCJun 15, 17:20 UTC55m
2026-06-15 N739ZW - Jun 15, 14:50 UTCJun 15, 15:00 UTC10m
2026-06-15 N739ZW - Jun 15, 13:50 UTCJun 15, 14:00 UTC10m
2026-06-14 N739ZW - Jun 14, 15:20 UTCJun 14, 16:05 UTC45m

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 N739ZW page for operator, model, and routing details .

Mode-S A9EECE frequently asked

What is Mode-S code A9EECE?
A9EECE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N739ZW.
Where is Mode-S A9EECE registered?
Mode-S code A9EECE 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 A9EECE broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9EECE, octal 52367316, decimal 11,136,718.
What flights does A9EECE operate?
Mode-S A9EECE has broadcast 1 distinct callsign, including N739ZW.