Apparatus

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sensors Mode-S transponder

A27449

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2573J · PIPER PA-18 Super Cub · operated by BUSCH BRUCE K TRUSTEE

Hex
A27449
Octal
50472111
Decimal
10,646,601
Country
US
Tail
N2573J
Type
PA18
No current signal · last broadcast 11d ago
Flights observed
63
Distinct callsigns
1
Country
US
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S A27449.

Country allocation

The ICAO 24-bit address A27449 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
N2573J - 63 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N2573J - Jul 23, 16:55 UTCJul 23, 18:25 UTC1h 30m
2026-07-23 N2573J - Jul 23, 14:55 UTCJul 23, 16:10 UTC1h 15m
2026-07-23 N2573J - Jul 23, 14:40 UTCJul 23, 14:50 UTC10m
2026-07-20 N2573J - Jul 20, 16:15 UTCJul 20, 17:35 UTC1h 20m
2026-07-20 N2573J - Jul 20, 14:10 UTCJul 20, 15:35 UTC1h 25m
2026-07-19 N2573J - Jul 19, 20:05 UTCJul 19, 20:15 UTC10m
2026-07-19 N2573J - Jul 19, 15:50 UTCJul 19, 16:00 UTC10m
2026-07-18 N2573J - Jul 18, 17:20 UTCJul 18, 17:35 UTC15m
2026-07-18 N2573J - Jul 18, 15:35 UTCJul 18, 16:00 UTC25m
2026-07-17 N2573J EMT → EMT Jul 17, 13:00 UTCJul 17, 13:55 UTC55m
2026-07-15 N2573J EMT → EMT Jul 15, 13:00 UTCJul 15, 13:40 UTC40m
2026-07-13 N2573J - Jul 13, 12:55 UTCJul 13, 13:35 UTC40m
2026-07-12 N2573J - Jul 12, 20:25 UTCJul 12, 20:35 UTC10m
2026-07-12 N2573J - Jul 12, 15:55 UTCJul 12, 16:05 UTC10m
2026-07-08 N2573J EMT → EMT Jul 8, 12:50 UTCJul 8, 13:45 UTC55m
2026-07-07 N2573J - Jul 7, 12:50 UTCJul 7, 14:25 UTC1h 35m
2026-07-06 N2573J - Jul 6, 16:05 UTCJul 6, 16:45 UTC40m
2026-07-06 N2573J - Jul 6, 12:55 UTCJul 6, 13:30 UTC35m
2026-06-24 N2573J EMT → EMT Jun 24, 12:44 UTCJun 24, 12:54 UTC10m
2026-06-22 N2573J EMT → EMT Jun 22, 12:44 UTCJun 22, 13:19 UTC35m
2026-06-21 N2573J - Jun 21, 16:34 UTCJun 21, 17:54 UTC1h 20m
2026-06-21 N2573J - Jun 21, 14:34 UTCJun 21, 15:15 UTC40m
2026-06-19 N2573J - Jun 19, 00:05 UTCJun 19, 00:45 UTC39m
2026-06-18 N2573J - Jun 18, 21:15 UTCJun 18, 22:40 UTC1h 25m
2026-06-16 N2573J - Jun 16, 12:50 UTCJun 16, 13:50 UTC1h 0m
2026-06-15 N2573J EMT → EMT Jun 15, 12:45 UTCJun 15, 13:45 UTC1h 0m
2026-06-14 N2573J FUL → EMT Jun 14, 20:30 UTCJun 14, 20:45 UTC15m
2026-06-14 N2573J - Jun 14, 16:10 UTCJun 14, 16:20 UTC10m
2026-06-13 N2573J - Jun 13, 18:00 UTCJun 13, 18:20 UTC20m
2026-06-13 N2573J - Jun 13, 16:00 UTCJun 13, 16:20 UTC20m
2026-06-12 N2573J EMT → EMT Jun 12, 14:50 UTCJun 12, 15:50 UTC1h 0m
2026-06-10 N2573J - Jun 10, 12:45 UTCJun 10, 13:25 UTC40m
2026-06-07 N2573J - Jun 7, 19:35 UTCJun 7, 20:45 UTC1h 10m
2026-06-07 N2573J - Jun 7, 17:15 UTCJun 7, 17:55 UTC40m
2026-05-31 N2573J - May 31, 17:30 UTCMay 31, 18:05 UTC35m
2026-05-31 N2573J - May 31, 15:00 UTCMay 31, 15:45 UTC45m
2026-05-30 N2573J - May 30, 17:50 UTCMay 30, 18:15 UTC25m
2026-05-30 N2573J - May 30, 15:55 UTCMay 30, 16:20 UTC25m
2026-05-28 N2573J - May 28, 12:50 UTCMay 28, 13:50 UTC1h 0m
2026-05-25 N2573J - May 25, 18:35 UTCMay 25, 19:10 UTC35m
2026-05-25 N2573J - May 25, 15:20 UTCMay 25, 16:00 UTC40m
2026-05-20 N2573J EMT → EMT May 20, 12:50 UTCMay 20, 13:50 UTC1h 0m
2026-05-19 N2573J - May 19, 12:50 UTCMay 19, 14:35 UTC1h 45m
2026-05-17 N2573J POC → EMT May 17, 20:01 UTCMay 17, 20:20 UTC20m
2026-05-17 N2573J EMT → POC May 17, 18:05 UTCMay 17, 18:20 UTC15m
2026-05-16 N2573J - May 16, 18:45 UTCMay 16, 19:15 UTC30m
2026-05-16 N2573J - May 16, 16:35 UTCMay 16, 16:55 UTC20m
2026-05-11 N2573J - May 11, 13:00 UTCMay 11, 13:55 UTC55m
2026-05-10 N2573J - May 10, 20:20 UTCMay 10, 20:35 UTC15m
2026-05-10 N2573J - May 10, 16:50 UTCMay 10, 16:59 UTC10m

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 N2573J page for operator, model, and routing details .

Mode-S A27449 frequently asked

What is Mode-S code A27449?
A27449 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2573J.
Where is Mode-S A27449 registered?
Mode-S code A27449 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 A27449 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A27449, octal 50472111, decimal 10,646,601.
What flights does A27449 operate?
Mode-S A27449 has broadcast 1 distinct callsign, including N2573J.