Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9DD54

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73477 · CESSNA 172 Skyhawk · operated by NATIONWIDE AVIATION LLC

Hex
A9DD54
Octal
52356524
Decimal
11,132,244
Country
US
Tail
N73477
Type
C172
No current signal · last broadcast 46m ago
Flights observed
153
Distinct callsigns
1
Country
US
Last broadcast
46m ago

Last known position

Most recent position reported by Mode-S A9DD54.

Country allocation

The ICAO 24-bit address A9DD54 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
NWX477 - 151 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NWX477 - Jul 14, 20:10 UTCJul 14, 20:35 UTC25m
2026-07-09 NWX477 - Jul 9, 19:00 UTCJul 9, 20:10 UTC1h 10m
2026-07-09 NWX477 - Jul 9, 15:10 UTCJul 9, 16:10 UTC1h 0m
2026-07-08 NWX477 - Jul 8, 19:30 UTCJul 8, 20:40 UTC1h 10m
2026-07-06 NWX477 - Jul 6, 14:25 UTCJul 6, 15:15 UTC50m
2026-07-05 NWX477 - Jul 5, 01:15 UTCJul 5, 02:10 UTC55m
2026-07-04 NWX477 - Jul 4, 17:10 UTCJul 4, 17:30 UTC20m
2026-07-02 NWX477 - Jul 2, 15:55 UTCJul 2, 17:15 UTC1h 20m
2026-07-02 NWX477 - Jul 2, 12:15 UTCJul 2, 12:35 UTC20m
2026-07-02 NWX477 - Jul 2, 00:55 UTCJul 2, 01:50 UTC55m
2026-07-01 NWX477 - Jul 1, 22:50 UTCJul 1, 23:35 UTC45m
2026-07-01 NWX477 - Jul 1, 11:05 UTCJul 1, 12:15 UTC1h 10m
2026-06-30 NWX477 - Jun 30, 21:30 UTCJun 30, 22:45 UTC1h 15m
2026-06-30 NWX477 - Jun 30, 17:20 UTCJun 30, 17:55 UTC35m
2026-06-29 NWX477 - Jun 29, 20:35 UTCJun 29, 21:34 UTC1h 0m
2026-06-29 NWX477 - Jun 29, 12:29 UTCJun 29, 13:34 UTC1h 5m
2026-06-27 NWX477 - Jun 27, 17:34 UTCJun 27, 18:04 UTC30m
2026-06-27 NWX477 - Jun 27, 14:39 UTCJun 27, 15:24 UTC45m
2026-06-27 NWX477 - Jun 27, 13:24 UTCJun 27, 13:40 UTC15m
2026-06-26 NWX477 - Jun 26, 11:34 UTCJun 26, 13:15 UTC1h 40m
2026-06-25 NWX477 - Jun 25, 22:04 UTCJun 25, 22:54 UTC50m
2026-06-25 NWX477 - Jun 25, 18:34 UTCJun 25, 19:20 UTC45m
2026-06-25 NWX477 - Jun 25, 12:04 UTCJun 25, 12:40 UTC35m
2026-06-24 NWX477 - Jun 24, 21:09 UTCJun 24, 22:10 UTC1h 0m
2026-06-24 NWX477 - Jun 24, 17:55 UTCJun 24, 18:05 UTC10m
2026-06-24 NWX477 - Jun 24, 16:29 UTCJun 24, 16:54 UTC25m
2026-06-24 NWX477 - Jun 24, 00:25 UTCJun 24, 00:40 UTC15m
2026-06-23 NWX477 - Jun 23, 21:45 UTCJun 23, 23:05 UTC1h 20m
2026-06-20 NWX477 - Jun 20, 18:19 UTCJun 20, 19:40 UTC1h 20m
2026-06-20 NWX477 - Jun 20, 17:10 UTCJun 20, 17:44 UTC35m
2026-06-20 NWX477 - Jun 20, 14:09 UTCJun 20, 14:35 UTC25m
2026-06-20 NWX477 - Jun 20, 11:44 UTCJun 20, 13:19 UTC1h 35m
2026-06-19 NWX477 - Jun 19, 00:29 UTCJun 19, 03:24 UTC2h 55m
2026-06-17 NWX477 - Jun 17, 15:25 UTCJun 17, 17:20 UTC1h 55m
2026-06-16 NWX477 - Jun 16, 19:25 UTCJun 16, 19:55 UTC31m
2026-06-16 NWX477 - Jun 16, 17:15 UTCJun 16, 18:05 UTC50m
2026-06-16 NWX477 - Jun 16, 13:34 UTCJun 16, 13:55 UTC20m
2026-06-16 NWX477 - Jun 16, 11:25 UTCJun 16, 12:30 UTC1h 5m
2026-06-15 NWX477 - Jun 15, 22:10 UTCJun 15, 23:15 UTC1h 5m
2026-06-15 NWX477 - Jun 15, 12:49 UTCJun 15, 13:25 UTC35m
2026-06-14 NWX477 - Jun 14, 13:15 UTCJun 14, 13:55 UTC40m
2026-06-12 NWX477 - Jun 12, 13:35 UTCJun 12, 14:01 UTC25m
2026-06-12 NWX477 - Jun 12, 12:35 UTCJun 12, 13:05 UTC30m
2026-06-11 NWX477 - Jun 11, 14:40 UTCJun 11, 14:55 UTC15m
2026-06-11 NWX477 - Jun 11, 12:35 UTCJun 11, 13:50 UTC1h 15m
2026-06-10 NWX477 - Jun 10, 23:00 UTCJun 10, 23:45 UTC45m
2026-06-10 NWX477 - Jun 10, 22:05 UTCJun 10, 22:20 UTC15m
2026-06-10 NWX477 - Jun 10, 16:40 UTCJun 10, 16:50 UTC10m
2026-06-10 NWX477 - Jun 10, 15:20 UTCJun 10, 15:35 UTC15m
2026-06-10 NWX477 - Jun 10, 13:05 UTCJun 10, 13:45 UTC40m

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 N73477 page for operator, model, and routing details .

Mode-S A9DD54 frequently asked

What is Mode-S code A9DD54?
A9DD54 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73477.
Where is Mode-S A9DD54 registered?
Mode-S code A9DD54 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 A9DD54 broadcasting right now?
No active broadcast right now. Last signal was 46m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9DD54, octal 52356524, decimal 11,132,244.
What flights does A9DD54 operate?
Mode-S A9DD54 has broadcast 1 distinct callsign, including NWX477.