Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4CA56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N40798 · PIPER PA-28-140/150/160/180 · operated by HOVNANYAN ARI

Hex
A4CA56
Octal
51145126
Decimal
10,799,702
Country
US
Tail
N40798
Type
P28A
No current signal · last broadcast 9h ago
Flights observed
107
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A4CA56.

Country allocation

The ICAO 24-bit address A4CA56 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
N40798 - 107 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N40798 VNY → VNY May 29, 20:55 UTCMay 29, 22:15 UTC1h 20m
2026-05-29 N40798 VNY → VNY May 29, 18:45 UTCMay 29, 19:35 UTC50m
2026-05-28 N40798 VNY → VNY May 28, 23:20 UTCMay 29, 00:25 UTC1h 5m
2026-05-28 N40798 VNY → VNY May 28, 20:15 UTCMay 28, 21:15 UTC1h 0m
2026-05-27 N40798 - May 27, 00:14 UTCMay 27, 01:09 UTC55m
2026-05-26 N40798 VNY → RAL May 26, 23:14 UTCMay 26, 23:49 UTC35m
2026-05-26 N40798 - May 26, 20:29 UTCMay 26, 20:45 UTC15m
2026-05-26 N40798 VNY → VNY May 26, 18:45 UTCMay 26, 20:20 UTC1h 35m
2026-05-25 N40798 VNY → VNY May 25, 19:30 UTCMay 25, 20:59 UTC1h 30m
2026-05-24 N40798 - May 24, 23:00 UTCMay 24, 23:35 UTC35m
2026-05-23 N40798 VNY → VNY May 23, 21:10 UTCMay 23, 21:40 UTC30m
2026-05-23 N40798 VNY → VNY May 23, 19:35 UTCMay 23, 19:55 UTC20m
2026-05-22 N40798 VNY → VNY May 22, 22:15 UTCMay 22, 23:35 UTC1h 20m
2026-05-22 N40798 VNY → VNY May 22, 19:15 UTCMay 22, 19:35 UTC20m
2026-05-22 N40798 SMO → VNY May 22, 02:30 UTCMay 22, 02:50 UTC20m
2026-05-22 N40798 VNY → SMO May 22, 01:45 UTCMay 22, 02:20 UTC35m
2026-05-21 N40798 VNY → VNY May 21, 23:55 UTCMay 22, 00:50 UTC55m
2026-05-21 N40798 - May 21, 19:55 UTCMay 21, 21:15 UTC1h 20m
2026-05-21 N40798 VNY → VNY May 21, 19:20 UTCMay 21, 19:25 UTC5m
2026-05-21 N40798 VNY → VNY May 21, 18:15 UTCMay 21, 19:10 UTC55m
2026-05-20 N40798 VNY → VNY May 20, 23:00 UTCMay 21, 00:15 UTC1h 15m
2026-05-20 N40798 VNY → VNY May 20, 17:30 UTCMay 20, 18:50 UTC1h 20m
2026-05-20 N40798 VNY → VNY May 20, 17:15 UTCMay 20, 17:20 UTC5m
2026-05-20 N40798 VNY → VNY May 20, 17:05 UTCMay 20, 17:10 UTC5m
2026-05-19 N40798 - May 19, 20:25 UTCMay 19, 20:30 UTC5m
2026-05-19 N40798 VNY → VNY May 19, 20:05 UTCMay 19, 20:20 UTC15m
2026-05-19 N40798 - May 19, 17:40 UTCMay 19, 18:40 UTC1h 0m
2026-05-19 N40798 VNY → SBD May 19, 16:05 UTCMay 19, 16:55 UTC50m
2026-05-18 N40798 VNY → VNY May 18, 21:55 UTCMay 18, 23:20 UTC1h 25m
2026-05-18 N40798 - May 18, 02:15 UTCMay 18, 02:35 UTC20m
2026-05-18 N40798 VNY → LGB May 18, 00:10 UTCMay 18, 00:30 UTC20m
2026-05-17 N40798 VNY → VNY May 17, 15:45 UTCMay 17, 16:55 UTC1h 10m
2026-05-16 N40798 VNY → VNY May 16, 23:10 UTCMay 17, 00:25 UTC1h 15m
2026-05-16 N40798 - May 16, 20:20 UTCMay 16, 21:30 UTC1h 10m
2026-05-16 N40798 VNY → VNY May 16, 20:10 UTCMay 16, 20:15 UTC5m
2026-05-14 N40798 VNY → VNY May 14, 22:25 UTCMay 14, 23:40 UTC1h 15m
2026-05-14 N40798 VNY → VNY May 14, 17:40 UTCMay 14, 19:10 UTC1h 30m
2026-05-14 N40798 VNY → VNY May 14, 02:00 UTCMay 14, 02:55 UTC55m
2026-05-13 N40798 VNY → VNY May 13, 17:10 UTCMay 13, 18:10 UTC1h 0m
2026-05-12 N40798 - May 12, 22:25 UTCMay 12, 23:15 UTC50m
2026-05-12 N40798 VNY → RAL May 12, 21:15 UTCMay 12, 22:01 UTC45m
2026-05-12 N40798 - May 12, 18:50 UTCMay 12, 19:10 UTC20m
2026-05-12 N40798 - May 12, 17:25 UTCMay 12, 18:00 UTC35m
2026-05-11 N40798 VNY → VNY May 11, 05:15 UTCMay 11, 05:20 UTC5m
2026-05-11 N40798 VNY → VNY May 11, 04:30 UTCMay 11, 05:00 UTC30m
2026-05-09 N40798 VNY → VNY May 9, 03:30 UTCMay 9, 05:15 UTC1h 45m
2026-05-08 N40798 - May 8, 19:45 UTCMay 8, 20:30 UTC45m
2026-05-08 N40798 VNY → RAL May 8, 18:55 UTCMay 8, 19:35 UTC40m
2026-05-08 N40798 - May 8, 01:35 UTCMay 8, 02:29 UTC55m
2026-05-07 N40798 - May 7, 19:45 UTCMay 7, 20:45 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 N40798 page for operator, model, and routing details .

Mode-S A4CA56 frequently asked

What is Mode-S code A4CA56?
A4CA56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N40798.
Where is Mode-S A4CA56 registered?
Mode-S code A4CA56 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 A4CA56 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CA56, octal 51145126, decimal 10,799,702.
What flights does A4CA56 operate?
Mode-S A4CA56 has broadcast 1 distinct callsign, including N40798.