Apparatus

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sensors Mode-S transponder

A4AE8C

ICAO 24-bit transponder address · allocated to United States

Hex
A4AE8C
Octal
51127214
Decimal
10,792,588
Country
US
No current signal · last broadcast Jul 23, 23:15 UTC
Flights observed
59
Distinct callsigns
1
Country
US
Last broadcast
Jul 23, 23:15 UTC

Last known position

Most recent position reported by Mode-S A4AE8C.

Country allocation

The ICAO 24-bit address A4AE8C 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
N400VR - 58 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N400VR - Jul 23, 22:55 UTCJul 23, 23:15 UTC20m
2026-07-23 N400VR - Jul 23, 15:55 UTCJul 23, 16:40 UTC45m
2026-07-21 N400VR - Jul 21, 20:25 UTCJul 21, 20:50 UTC25m
2026-07-21 N400VR - Jul 21, 18:50 UTCJul 21, 19:15 UTC25m
2026-07-13 N400VR - Jul 13, 23:00 UTCJul 13, 23:20 UTC20m
2026-07-13 N400VR - Jul 13, 21:15 UTCJul 13, 21:30 UTC15m
2026-07-11 - - Jul 11, 17:05 UTCJul 11, 17:15 UTC10m
2026-07-10 N400VR - Jul 10, 14:15 UTCJul 10, 14:40 UTC25m
2026-06-18 N400VR - Jun 18, 17:21 UTCJun 18, 18:10 UTC49m
2026-06-14 N400VR - Jun 14, 12:25 UTCJun 14, 13:25 UTC1h 0m
2026-06-12 N400VR - Jun 12, 16:45 UTCJun 12, 17:50 UTC1h 5m
2026-06-10 N400VR - Jun 10, 04:10 UTCJun 10, 04:30 UTC20m
2026-06-09 N400VR - Jun 9, 23:50 UTCJun 10, 00:00 UTC10m
2026-06-09 N400VR - Jun 9, 19:00 UTCJun 9, 19:55 UTC55m
2026-06-07 N400VR - Jun 7, 23:00 UTCJun 7, 23:10 UTC10m
2026-06-07 N400VR - Jun 7, 21:10 UTCJun 7, 21:45 UTC35m
2026-06-07 N400VR - Jun 7, 18:00 UTCJun 7, 18:10 UTC10m
2026-06-06 N400VR - Jun 6, 18:35 UTCJun 6, 18:55 UTC20m
2026-06-06 N400VR - Jun 6, 17:19 UTCJun 6, 17:40 UTC20m
2026-05-30 N400VR - May 30, 20:40 UTCMay 30, 23:00 UTC2h 20m
2026-05-30 N400VR - May 30, 17:55 UTCMay 30, 19:40 UTC1h 45m
2026-05-30 N400VR - May 30, 15:05 UTCMay 30, 16:35 UTC1h 30m
2026-05-29 N400VR - May 29, 23:10 UTCMay 29, 23:45 UTC35m
2026-05-29 N400VR - May 29, 21:25 UTCMay 29, 21:45 UTC20m
2026-05-28 N400VR - May 28, 18:45 UTCMay 28, 19:00 UTC15m
2026-05-28 N400VR - May 28, 16:15 UTCMay 28, 16:25 UTC10m
2026-05-27 N400VR - May 27, 23:15 UTCMay 28, 00:00 UTC45m
2026-05-27 N400VR - May 27, 22:25 UTCMay 27, 22:45 UTC20m
2026-05-25 N400VR - May 25, 17:45 UTCMay 25, 19:59 UTC2h 15m
2026-05-22 N400VR - May 22, 21:10 UTCMay 22, 21:30 UTC20m
2026-05-22 N400VR - May 22, 16:05 UTCMay 22, 16:15 UTC10m
2026-05-16 N400VR - May 16, 22:45 UTCMay 16, 23:10 UTC25m
2026-05-16 N400VR - May 16, 21:25 UTCMay 16, 22:05 UTC40m
2026-05-15 N400VR - May 15, 22:10 UTCMay 16, 00:15 UTC2h 5m
2026-05-12 N400VR - May 12, 21:45 UTCMay 12, 21:55 UTC10m
2026-05-12 N400VR - May 12, 14:55 UTCMay 12, 15:35 UTC40m
2026-05-11 N400VR - May 11, 21:10 UTCMay 11, 22:05 UTC55m
2026-05-11 N400VR - May 11, 15:10 UTCMay 11, 15:25 UTC15m
2026-05-09 N400VR - May 9, 16:50 UTCMay 9, 18:40 UTC1h 50m
2026-05-07 N400VR - May 7, 22:50 UTCMay 8, 00:40 UTC1h 50m
2026-05-07 N400VR - May 7, 20:55 UTCMay 7, 22:10 UTC1h 15m
2026-05-05 N400VR - May 5, 02:40 UTCMay 5, 04:30 UTC1h 50m
2026-05-04 N400VR - May 4, 23:15 UTCMay 5, 00:00 UTC45m
2026-05-04 N400VR - May 4, 22:15 UTCMay 4, 22:25 UTC10m
2026-05-04 N400VR - May 4, 16:40 UTCMay 4, 17:20 UTC40m
2026-05-04 N400VR - May 4, 15:25 UTCMay 4, 16:00 UTC35m
2026-05-04 N400VR - May 4, 12:45 UTCMay 4, 14:30 UTC1h 45m
2026-05-03 N400VR - May 3, 19:45 UTCMay 3, 21:35 UTC1h 50m
2026-05-02 N400VR - May 2, 18:45 UTCMay 2, 19:40 UTC55m
2026-05-02 N400VR - May 2, 17:45 UTCMay 2, 18:05 UTC20m

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.

Mode-S A4AE8C frequently asked

What is Mode-S code A4AE8C?
A4AE8C is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A4AE8C registered?
Mode-S code A4AE8C 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 A4AE8C broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 23:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4AE8C, octal 51127214, decimal 10,792,588.
What flights does A4AE8C operate?
Mode-S A4AE8C has broadcast 1 distinct callsign, including N400VR.