Apparatus

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sensors Mode-S transponder

A63AA8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N500HJ · operated by 392E INC TRUSTEE

Hex
A63AA8
Octal
51435250
Decimal
10,893,992
Country
US
Tail
N500HJ
Type
H500
No current signal · last broadcast 8d ago
Flights observed
45
Distinct callsigns
1
Country
US
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S A63AA8.

Country allocation

The ICAO 24-bit address A63AA8 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
N500HJ - 45 2026-07-25

Recent flights last 45

DateFlightRouteTakeoffLandingDuration
2026-07-25 N500HJ - Jul 25, 12:45 UTCJul 25, 13:15 UTC30m
2026-07-25 N500HJ - Jul 25, 08:35 UTCJul 25, 09:40 UTC1h 5m
2026-07-22 N500HJ - Jul 22, 14:10 UTCJul 22, 14:45 UTC35m
2026-07-22 N500HJ - Jul 22, 12:05 UTCJul 22, 12:20 UTC15m
2026-07-20 N500HJ - Jul 20, 13:35 UTCJul 20, 13:50 UTC15m
2026-07-20 N500HJ - Jul 20, 10:20 UTCJul 20, 11:00 UTC40m
2026-07-18 N500HJ - Jul 18, 14:20 UTCJul 18, 14:50 UTC30m
2026-07-18 N500HJ - Jul 18, 11:55 UTCJul 18, 12:20 UTC25m
2026-07-17 N500HJ - Jul 17, 10:10 UTCJul 17, 10:35 UTC25m
2026-07-17 N500HJ - Jul 17, 07:25 UTCJul 17, 07:50 UTC25m
2026-07-15 N500HJ - Jul 15, 16:55 UTCJul 15, 17:20 UTC25m
2026-07-15 N500HJ - Jul 15, 14:35 UTCJul 15, 14:55 UTC20m
2026-07-11 N500HJ - Jul 11, 12:20 UTCJul 11, 12:35 UTC15m
2026-07-11 N500HJ - Jul 11, 10:40 UTCJul 11, 11:15 UTC35m
2026-06-27 N500HJ - Jun 27, 14:45 UTCJun 27, 15:14 UTC30m
2026-06-27 N500HJ - Jun 27, 10:34 UTCJun 27, 11:09 UTC35m
2026-06-23 N500HJ - Jun 23, 09:09 UTCJun 23, 09:24 UTC15m
2026-06-23 N500HJ - Jun 23, 07:29 UTCJun 23, 07:49 UTC20m
2026-06-22 N500HJ - Jun 22, 16:10 UTCJun 22, 16:24 UTC15m
2026-06-22 N500HJ - Jun 22, 14:19 UTCJun 22, 14:29 UTC10m
2026-06-20 N500HJ - Jun 20, 15:49 UTCJun 20, 16:14 UTC25m
2026-06-20 N500HJ - Jun 20, 14:29 UTCJun 20, 14:44 UTC15m
2026-06-20 N500HJ - Jun 20, 10:04 UTCJun 20, 10:39 UTC35m
2026-06-15 N500HJ - Jun 15, 12:35 UTCJun 15, 13:20 UTC45m
2026-06-15 N500HJ - Jun 15, 10:35 UTCJun 15, 10:50 UTC15m
2026-06-15 N500HJ - Jun 15, 08:40 UTCJun 15, 09:20 UTC40m
2026-06-13 N500HJ - Jun 13, 11:15 UTCJun 13, 11:50 UTC35m
2026-06-13 N500HJ - Jun 13, 08:55 UTCJun 13, 09:20 UTC25m
2026-06-12 N500HJ - Jun 12, 09:45 UTCJun 12, 10:20 UTC35m
2026-06-12 N500HJ - Jun 12, 08:25 UTCJun 12, 08:40 UTC15m
2026-05-30 N500HJ - May 30, 16:45 UTCMay 30, 17:10 UTC25m
2026-05-30 N500HJ - May 30, 15:20 UTCMay 30, 15:45 UTC25m
2026-05-30 N500HJ - May 30, 11:25 UTCMay 30, 12:35 UTC1h 10m
2026-05-30 N500HJ - May 30, 10:00 UTCMay 30, 10:25 UTC25m
2026-05-27 N500HJ - May 27, 13:20 UTCMay 27, 14:10 UTC50m
2026-05-22 N500HJ - May 22, 09:55 UTCMay 22, 10:25 UTC30m
2026-05-22 N500HJ - May 22, 07:30 UTCMay 22, 07:50 UTC20m
2026-04-30 N500HJ - Apr 30, 13:55 UTCApr 30, 14:25 UTC30m
2026-04-30 N500HJ - Apr 30, 11:50 UTCApr 30, 12:20 UTC30m
2026-04-25 N500HJ - Apr 25, 13:00 UTCApr 25, 13:30 UTC30m
2026-04-23 N500HJ - Apr 23, 10:35 UTCApr 23, 11:01 UTC25m
2026-04-19 N500HJ - Apr 19, 14:40 UTCApr 19, 15:25 UTC45m
2026-04-18 N500HJ - Apr 18, 14:05 UTCApr 18, 14:35 UTC30m
2026-04-18 N500HJ - Apr 18, 08:55 UTCApr 18, 09:25 UTC30m
2026-04-14 N500HJ - Apr 14, 09:20 UTCApr 14, 10:10 UTC50m

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 N500HJ page for operator, model, and routing details .

Mode-S A63AA8 frequently asked

What is Mode-S code A63AA8?
A63AA8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N500HJ.
Where is Mode-S A63AA8 registered?
Mode-S code A63AA8 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 A63AA8 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A63AA8, octal 51435250, decimal 10,893,992.
What flights does A63AA8 operate?
Mode-S A63AA8 has broadcast 1 distinct callsign, including N500HJ.