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sensors Mode-S transponder

A54D2C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4401V · CESSNA 170 · operated by EWALD CHRISTOPHER R

Hex
A54D2C
Octal
51246454
Decimal
10,833,196
Country
US
Tail
N4401V
Type
C170
No current signal · last broadcast Jul 22, 20:40 UTC
Flights observed
49
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 20:40 UTC

Last known position

Most recent position reported by Mode-S A54D2C.

Country allocation

The ICAO 24-bit address A54D2C 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
N4401V - 49 2026-07-22

Recent flights last 49

DateFlightRouteTakeoffLandingDuration
2026-07-22 N4401V - Jul 22, 20:30 UTCJul 22, 20:40 UTC10m
2026-07-18 N4401V - Jul 18, 00:25 UTCJul 18, 00:39 UTC15m
2026-07-16 N4401V - Jul 16, 23:35 UTCJul 16, 23:49 UTC15m
2026-07-14 N4401V - Jul 14, 00:15 UTCJul 14, 00:30 UTC15m
2026-07-13 N4401V - Jul 13, 15:20 UTCJul 13, 15:30 UTC10m
2026-07-13 N4401V - Jul 13, 14:00 UTCJul 13, 14:15 UTC15m
2026-07-11 N4401V - Jul 11, 00:05 UTCJul 11, 00:25 UTC20m
2026-07-10 N4401V - Jul 10, 00:15 UTCJul 10, 00:30 UTC15m
2026-07-09 N4401V - Jul 9, 14:00 UTCJul 9, 14:10 UTC10m
2026-07-08 N4401V - Jul 8, 23:50 UTCJul 9, 00:10 UTC20m
2026-07-08 N4401V - Jul 8, 14:15 UTCJul 8, 14:25 UTC10m
2026-07-08 N4401V - Jul 8, 00:50 UTCJul 8, 01:05 UTC15m
2026-07-07 N4401V - Jul 7, 14:05 UTCJul 7, 14:15 UTC10m
2026-07-07 N4401V - Jul 7, 00:10 UTCJul 7, 00:25 UTC15m
2026-07-02 N4401V - Jul 2, 00:10 UTCJul 2, 00:25 UTC15m
2026-07-01 N4401V - Jul 1, 00:30 UTCJul 1, 00:45 UTC15m
2026-06-30 N4401V - Jun 30, 14:10 UTCJun 30, 14:20 UTC10m
2026-06-29 N4401V - Jun 29, 13:49 UTCJun 29, 13:59 UTC10m
2026-06-24 N4401V - Jun 24, 23:45 UTCJun 24, 23:59 UTC15m
2026-06-23 N4401V - Jun 23, 23:24 UTCJun 23, 23:39 UTC15m
2026-06-20 N4401V - Jun 20, 00:34 UTCJun 20, 00:44 UTC10m
2026-06-18 N4401V - Jun 18, 23:45 UTCJun 19, 00:00 UTC15m
2026-06-18 N4401V - Jun 18, 00:20 UTCJun 18, 00:35 UTC15m
2026-06-17 N4401V - Jun 17, 00:40 UTCJun 17, 00:55 UTC15m
2026-06-12 N4401V - Jun 12, 23:50 UTCJun 13, 00:00 UTC10m
2026-06-11 N4401V - Jun 11, 00:15 UTCJun 11, 00:30 UTC15m
2026-06-10 N4401V - Jun 10, 13:20 UTCJun 10, 13:30 UTC10m
2026-06-03 N4401V - Jun 3, 23:15 UTCJun 3, 23:30 UTC15m
2026-06-03 N4401V - Jun 3, 00:00 UTCJun 3, 00:15 UTC15m
2026-05-27 N4401V - May 27, 14:00 UTCMay 27, 14:10 UTC10m
2026-05-23 N4401V - May 23, 23:45 UTCMay 24, 00:00 UTC15m
2026-05-20 N4401V - May 20, 13:50 UTCMay 20, 14:00 UTC10m
2026-05-16 N4401V - May 16, 00:20 UTCMay 16, 00:30 UTC10m
2026-05-15 N4401V - May 15, 00:25 UTCMay 15, 00:40 UTC15m
2026-05-13 N4401V - May 13, 23:30 UTCMay 13, 23:40 UTC10m
2026-05-12 N4401V - May 12, 23:25 UTCMay 12, 23:35 UTC10m
2026-05-09 N4401V - May 9, 00:35 UTCMay 9, 00:50 UTC15m
2026-05-06 N4401V - May 6, 23:50 UTCMay 7, 00:05 UTC15m
2026-05-06 N4401V - May 6, 14:05 UTCMay 6, 14:15 UTC10m
2026-05-05 N4401V - May 5, 23:15 UTCMay 5, 23:30 UTC15m
2026-05-02 N4401V - May 2, 01:15 UTCMay 2, 01:30 UTC15m
2026-04-29 N4401V - Apr 29, 00:00 UTCApr 29, 00:10 UTC10m
2026-04-25 N4401V - Apr 25, 00:10 UTCApr 25, 00:20 UTC10m
2026-04-24 N4401V - Apr 24, 00:55 UTCApr 24, 01:10 UTC15m
2026-04-23 N4401V - Apr 23, 23:30 UTCApr 24, 00:05 UTC35m
2026-04-23 N4401V - Apr 23, 14:45 UTCApr 23, 15:30 UTC45m
2026-04-21 N4401V - Apr 21, 23:45 UTCApr 21, 23:55 UTC10m
2026-04-17 N4401V - Apr 17, 23:45 UTCApr 18, 00:00 UTC15m
2026-04-16 N4401V - Apr 16, 00:05 UTCApr 16, 00:15 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 N4401V page for operator, model, and routing details .

Mode-S A54D2C frequently asked

What is Mode-S code A54D2C?
A54D2C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4401V.
Where is Mode-S A54D2C registered?
Mode-S code A54D2C 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 A54D2C broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54D2C, octal 51246454, decimal 10,833,196.
What flights does A54D2C operate?
Mode-S A54D2C has broadcast 1 distinct callsign, including N4401V.