Apparatus

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sensors Mode-S transponder

A4E351

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N414DK · CESSNA 414 Chancellor · operated by ON TOP AVIATION LLC

Hex
A4E351
Octal
51161521
Decimal
10,806,097
Country
US
Tail
N414DK
Type
C414
No current signal · last broadcast Jul 26, 07:45 UTC
Flights observed
24
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 07:45 UTC

Last known position

Most recent position reported by Mode-S A4E351.

Country allocation

The ICAO 24-bit address A4E351 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
N414DK - 24 2026-07-26

Recent flights last 24

DateFlightRouteTakeoffLandingDuration
2026-07-26 N414DK - Jul 26, 06:45 UTCJul 26, 07:45 UTC1h 0m
2026-07-24 N414DK - Jul 24, 14:05 UTCJul 24, 14:15 UTC10m
2026-07-22 N414DK VGT → VGT Jul 22, 04:30 UTCJul 22, 05:10 UTC40m
2026-07-21 N414DK - Jul 21, 04:15 UTCJul 21, 05:15 UTC1h 0m
2026-07-18 N414DK - Jul 18, 04:20 UTCJul 18, 05:15 UTC55m
2026-07-12 N414DK - Jul 12, 00:01 UTCJul 12, 00:45 UTC45m
2026-07-09 N414DK VGT → VGT Jul 9, 04:15 UTCJul 9, 04:50 UTC35m
2026-06-30 N414DK VGT → VGT Jun 30, 01:19 UTCJun 30, 01:50 UTC31m
2026-05-14 N414DK - May 14, 04:35 UTCMay 14, 05:00 UTC25m
2026-05-14 N414DK - May 14, 04:20 UTCMay 14, 04:25 UTC5m
2026-05-14 N414DK VGT → VGT May 14, 03:05 UTCMay 14, 03:50 UTC45m
2026-05-11 N414DK VGT → VGT May 11, 02:45 UTCMay 11, 03:10 UTC25m
2026-05-10 N414DK - May 10, 02:34 UTCMay 10, 02:39 UTC5m
2026-05-10 N414DK - May 10, 02:14 UTCMay 10, 02:24 UTC10m
2026-05-09 N414DK - May 9, 04:10 UTCMay 9, 04:50 UTC40m
2026-05-08 N414DK VGT → VGT May 8, 04:14 UTCMay 8, 05:14 UTC1h 0m
2026-05-05 N414DK - May 5, 03:20 UTCMay 5, 04:05 UTC45m
2026-05-04 N414DK VGT → VGT May 4, 03:19 UTCMay 4, 03:45 UTC25m
2026-04-29 N414DK VGT → VGT Apr 29, 01:25 UTCApr 29, 01:50 UTC25m
2026-04-26 N414DK VGT → VGT Apr 26, 03:15 UTCApr 26, 03:45 UTC30m
2026-04-23 N414DK VGT → VGT Apr 23, 02:15 UTCApr 23, 02:45 UTC30m
2026-04-22 N414DK VGT → VGT Apr 22, 04:15 UTCApr 22, 04:45 UTC30m
2026-04-19 N414DK VGT → VGT Apr 19, 04:20 UTCApr 19, 04:50 UTC30m
2026-04-19 N414DK VGT → VGT Apr 19, 02:10 UTCApr 19, 03:10 UTC1h 0m

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 N414DK page for operator, model, and routing details .

Mode-S A4E351 frequently asked

What is Mode-S code A4E351?
A4E351 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N414DK.
Where is Mode-S A4E351 registered?
Mode-S code A4E351 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 A4E351 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4E351, octal 51161521, decimal 10,806,097.
What flights does A4E351 operate?
Mode-S A4E351 has broadcast 1 distinct callsign, including N414DK.