Apparatus

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sensors Mode-S transponder

A77447

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N58HJ · BELL UH-1 Huey

Hex
A77447
Octal
51672107
Decimal
10,974,279
Country
US
Tail
N58HJ
Type
UH1
No current signal · last broadcast 23d ago
Flights observed
56
Distinct callsigns
1
Country
US
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S A77447.

Country allocation

The ICAO 24-bit address A77447 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
N3804C - 56 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N3804C - Jul 25, 22:45 UTCJul 26, 00:45 UTC2h 0m
2026-07-25 N3804C - Jul 25, 18:50 UTCJul 25, 19:15 UTC25m
2026-07-25 N3804C - Jul 25, 16:35 UTCJul 25, 16:50 UTC15m
2026-07-24 N3804C CNE → CNE Jul 24, 21:10 UTCJul 24, 23:30 UTC2h 20m
2026-07-24 N3804C CNE → CNE Jul 24, 19:05 UTCJul 24, 20:00 UTC55m
2026-07-24 N3804C - Jul 24, 17:25 UTCJul 24, 17:35 UTC10m
2026-07-24 N3804C - Jul 24, 16:35 UTCJul 24, 16:45 UTC10m
2026-07-24 N3804C - Jul 24, 02:10 UTCJul 24, 02:20 UTC10m
2026-07-23 N3804C - Jul 23, 17:25 UTCJul 23, 17:40 UTC15m
2026-07-22 N3804C - Jul 22, 20:05 UTCJul 22, 20:15 UTC10m
2026-07-22 N3804C - Jul 22, 19:05 UTCJul 22, 19:15 UTC10m
2026-07-21 N3804C - Jul 21, 18:10 UTCJul 21, 18:25 UTC15m
2026-07-21 N3804C - Jul 21, 15:35 UTCJul 21, 15:50 UTC15m
2026-07-21 N3804C - Jul 21, 01:05 UTCJul 21, 01:30 UTC25m
2026-07-20 N3804C - Jul 20, 23:55 UTCJul 21, 00:10 UTC15m
2026-07-20 N3804C - Jul 20, 22:20 UTCJul 20, 22:35 UTC15m
2026-07-20 N3804C - Jul 20, 18:30 UTCJul 20, 19:30 UTC1h 0m
2026-07-17 N3804C - Jul 17, 19:40 UTCJul 17, 20:04 UTC25m
2026-07-17 N3804C - Jul 17, 18:25 UTCJul 17, 18:40 UTC15m
2026-07-16 N3804C - Jul 16, 21:00 UTCJul 16, 21:15 UTC15m
2026-07-16 N3804C - Jul 16, 19:10 UTCJul 16, 19:25 UTC15m
2026-07-10 N3804C - Jul 10, 17:50 UTCJul 10, 18:25 UTC35m
2026-07-10 N3804C - Jul 10, 15:00 UTCJul 10, 15:55 UTC55m
2026-07-09 N3804C - Jul 9, 19:30 UTCJul 9, 19:50 UTC20m
2026-07-09 N3804C - Jul 9, 14:05 UTCJul 9, 15:00 UTC55m
2026-07-08 N3804C - Jul 8, 20:30 UTCJul 8, 21:10 UTC40m
2026-07-08 N3804C - Jul 8, 15:05 UTCJul 8, 15:15 UTC10m
2026-07-07 N3804C - Jul 7, 21:45 UTCJul 7, 22:15 UTC30m
2026-07-07 N3804C - Jul 7, 16:50 UTCJul 7, 17:00 UTC10m
2026-07-06 N3804C - Jul 6, 18:40 UTCJul 6, 19:45 UTC1h 5m
2026-07-03 N3804C - Jul 3, 19:15 UTCJul 3, 19:30 UTC15m
2026-07-01 N3804C - Jul 1, 18:30 UTCJul 1, 18:40 UTC10m
2026-07-01 N3804C - Jul 1, 17:15 UTCJul 1, 17:25 UTC10m
2026-06-28 N3804C - Jun 28, 14:30 UTCJun 28, 14:54 UTC25m
2026-06-27 N3804C - Jun 27, 17:59 UTCJun 27, 18:09 UTC10m
2026-06-18 N3804C - Jun 18, 18:35 UTCJun 18, 20:45 UTC2h 10m
2026-06-17 N3804C - Jun 17, 23:10 UTCJun 17, 23:35 UTC25m
2026-06-16 N3804C - Jun 16, 17:35 UTCJun 16, 17:49 UTC15m
2026-06-13 N3804C - Jun 13, 20:45 UTCJun 13, 21:00 UTC15m
2026-06-13 N3804C - Jun 13, 00:30 UTCJun 13, 01:00 UTC30m
2026-06-10 N3804C - Jun 10, 19:45 UTCJun 10, 20:00 UTC15m
2026-06-09 N3804C - Jun 9, 00:45 UTCJun 9, 00:55 UTC10m
2026-06-08 N3804C - Jun 8, 23:15 UTCJun 8, 23:35 UTC20m
2026-06-08 N3804C - Jun 8, 20:50 UTCJun 8, 21:35 UTC45m
2026-06-07 N3804C - Jun 7, 16:40 UTCJun 7, 16:50 UTC10m
2026-06-07 N3804C - Jun 7, 15:55 UTCJun 7, 16:05 UTC10m
2026-06-06 N3804C - Jun 6, 00:15 UTCJun 6, 00:35 UTC20m
2026-05-31 N3804C - May 31, 18:55 UTCMay 31, 19:15 UTC20m
2026-05-31 N3804C - May 31, 15:20 UTCMay 31, 15:40 UTC20m
2026-05-27 N3804C CNE → CNE May 27, 21:30 UTCMay 27, 22:45 UTC1h 15m

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 N58HJ page for operator, model, and routing details .

Mode-S A77447 frequently asked

What is Mode-S code A77447?
A77447 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N58HJ.
Where is Mode-S A77447 registered?
Mode-S code A77447 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 A77447 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A77447, octal 51672107, decimal 10,974,279.
What flights does A77447 operate?
Mode-S A77447 has broadcast 1 distinct callsign, including N3804C.