Apparatus

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sensors Mode-S transponder

A0422D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N11571 · CESSNA 150 · operated by SHEO MICHAEL K

Hex
A0422D
Octal
50041055
Decimal
10,502,701
Country
US
Tail
N11571
Type
C150
No current signal · last broadcast 37m ago
Flights observed
68
Distinct callsigns
1
Country
US
Last broadcast
37m ago

Last known position

Most recent position reported by Mode-S A0422D.

Country allocation

The ICAO 24-bit address A0422D 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
N11571 - 68 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 N11571 - May 30, 04:30 UTCMay 30, 05:15 UTC45m
2026-05-29 N11571 - May 29, 02:25 UTCMay 29, 04:05 UTC1h 40m
2026-05-28 N11571 CLS → PAE May 28, 06:55 UTCMay 28, 08:05 UTC1h 10m
2026-05-28 N11571 - May 28, 04:50 UTCMay 28, 06:10 UTC1h 20m
2026-05-28 N11571 - May 28, 00:20 UTCMay 28, 01:40 UTC1h 20m
2026-05-27 N11571 - May 27, 18:10 UTCMay 27, 19:15 UTC1h 5m
2026-05-27 N11571 - May 27, 05:35 UTCMay 27, 06:55 UTC1h 20m
2026-05-25 N11571 - May 25, 17:05 UTCMay 25, 18:45 UTC1h 40m
2026-05-25 N11571 - May 25, 02:05 UTCMay 25, 02:45 UTC40m
2026-05-23 N11571 - May 23, 02:30 UTCMay 23, 03:35 UTC1h 5m
2026-05-22 N11571 - May 22, 23:50 UTCMay 23, 01:15 UTC1h 25m
2026-05-22 N11571 - May 22, 18:55 UTCMay 22, 19:45 UTC50m
2026-05-22 N11571 - May 22, 16:40 UTCMay 22, 17:15 UTC35m
2026-05-22 N11571 - May 22, 00:35 UTCMay 22, 01:45 UTC1h 10m
2026-05-21 N11571 - May 21, 22:00 UTCMay 21, 23:05 UTC1h 5m
2026-05-21 N11571 PAE → PAE May 21, 19:55 UTCMay 21, 20:50 UTC55m
2026-05-21 N11571 PAE → PAE May 21, 05:05 UTCMay 21, 06:45 UTC1h 40m
2026-05-21 N11571 - May 21, 02:30 UTCMay 21, 03:30 UTC1h 0m
2026-05-20 N11571 PAE → PAE May 20, 21:35 UTCMay 20, 22:55 UTC1h 20m
2026-05-20 N11571 - May 20, 18:50 UTCMay 20, 19:10 UTC20m
2026-05-19 N11571 BLI → PAE May 19, 01:15 UTCMay 19, 02:00 UTC45m
2026-05-18 N11571 - May 18, 23:45 UTCMay 19, 00:30 UTC45m
2026-05-18 N11571 - May 18, 04:11 UTCMay 18, 05:35 UTC1h 25m
2026-05-18 N11571 - May 18, 02:00 UTCMay 18, 03:20 UTC1h 20m
2026-05-17 N11571 - May 17, 23:20 UTCMay 18, 01:00 UTC1h 40m
2026-05-17 N11571 - May 17, 20:45 UTCMay 17, 21:40 UTC55m
2026-05-17 N11571 PAE → PAE May 17, 17:40 UTCMay 17, 18:20 UTC40m
2026-05-12 N11571 - May 12, 16:50 UTCMay 12, 17:10 UTC20m
2026-05-12 N11571 - May 12, 16:05 UTCMay 12, 16:20 UTC15m
2026-05-11 N11571 - May 11, 00:00 UTCMay 11, 00:19 UTC20m
2026-05-10 N11571 - May 10, 23:09 UTCMay 10, 23:50 UTC40m
2026-05-10 N11571 - May 10, 21:40 UTCMay 10, 21:59 UTC20m
2026-05-10 N11571 - May 10, 18:35 UTCMay 10, 18:49 UTC15m
2026-05-10 N11571 - May 10, 15:05 UTCMay 10, 15:35 UTC30m
2026-05-10 N11571 - May 10, 05:14 UTCMay 10, 05:55 UTC40m
2026-05-10 N11571 PAE → PAE May 10, 02:00 UTCMay 10, 02:34 UTC35m
2026-05-10 N11571 - May 10, 00:05 UTCMay 10, 00:39 UTC35m
2026-05-09 N11571 - May 9, 23:05 UTCMay 9, 23:35 UTC30m
2026-05-09 N11571 - May 9, 02:55 UTCMay 9, 03:50 UTC55m
2026-05-08 N11571 PAE → PAE May 8, 01:04 UTCMay 8, 02:09 UTC1h 5m
2026-05-05 N11571 - May 5, 01:30 UTCMay 5, 03:00 UTC1h 30m
2026-05-04 N11571 PAE → PAE May 4, 21:25 UTCMay 4, 21:45 UTC20m
2026-05-03 N11571 - May 3, 22:00 UTCMay 3, 23:10 UTC1h 10m
2026-05-02 N11571 PAE → PAE May 2, 20:15 UTCMay 2, 21:10 UTC55m
2026-05-02 N11571 - May 2, 01:05 UTCMay 2, 01:40 UTC35m
2026-05-01 N11571 - May 1, 20:50 UTCMay 1, 22:10 UTC1h 20m
2026-05-01 N11571 PAE → PAE May 1, 18:25 UTCMay 1, 19:35 UTC1h 10m
2026-05-01 N11571 - May 1, 15:45 UTCMay 1, 16:55 UTC1h 10m
2026-05-01 N11571 PAE → PAE May 1, 00:30 UTCMay 1, 01:55 UTC1h 25m
2026-04-30 N11571 - Apr 30, 21:15 UTCApr 30, 22:20 UTC1h 5m

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 N11571 page for operator, model, and routing details .

Mode-S A0422D frequently asked

What is Mode-S code A0422D?
A0422D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N11571.
Where is Mode-S A0422D registered?
Mode-S code A0422D 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 A0422D broadcasting right now?
No active broadcast right now. Last signal was 37m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0422D, octal 50041055, decimal 10,502,701.
What flights does A0422D operate?
Mode-S A0422D has broadcast 1 distinct callsign, including N11571.