Apparatus

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sensors Mode-S transponder

A769B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N577PE · PILATUS PC-12 · operated by 1995 HOLDINGS LLC

Hex
A769B4
Octal
51664664
Decimal
10,971,572
Country
US
Tail
N577PE
Type
PC12
No current signal · last broadcast 4d ago
Flights observed
107
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A769B4.

Country allocation

The ICAO 24-bit address A769B4 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
N577PE - 107 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N577PE - Jul 16, 16:40 UTCJul 16, 17:35 UTC55m
2026-07-16 N577PE - Jul 16, 12:00 UTCJul 16, 13:00 UTC1h 0m
2026-07-14 N577PE - Jul 14, 16:00 UTCJul 14, 17:00 UTC1h 0m
2026-07-14 N577PE - Jul 14, 14:05 UTCJul 14, 15:05 UTC1h 0m
2026-07-12 N577PE - Jul 12, 21:10 UTCJul 12, 23:45 UTC2h 35m
2026-07-12 N577PE - Jul 12, 17:35 UTCJul 12, 18:50 UTC1h 15m
2026-07-12 N577PE - Jul 12, 15:30 UTCJul 12, 17:05 UTC1h 35m
2026-07-12 N577PE - Jul 12, 13:30 UTCJul 12, 14:30 UTC1h 0m
2026-07-10 N577PE - Jul 10, 13:25 UTCJul 10, 14:15 UTC50m
2026-07-10 N577PE - Jul 10, 12:10 UTCJul 10, 12:50 UTC40m
2026-07-09 N577PE - Jul 9, 17:25 UTCJul 9, 18:35 UTC1h 10m
2026-07-07 N577PE - Jul 7, 22:50 UTCJul 7, 23:50 UTC1h 0m
2026-07-07 N577PE - Jul 7, 18:40 UTCJul 7, 21:30 UTC2h 50m
2026-07-06 N577PE - Jul 6, 14:10 UTCJul 6, 15:10 UTC1h 0m
2026-07-06 N577PE - Jul 6, 12:30 UTCJul 6, 13:20 UTC50m
2026-07-02 N577PE - Jul 2, 18:30 UTCJul 2, 19:25 UTC55m
2026-06-29 N577PE - Jun 29, 10:29 UTCJun 29, 11:25 UTC55m
2026-06-27 N577PE - Jun 27, 19:05 UTCJun 27, 22:40 UTC3h 35m
2026-06-27 N577PE - Jun 27, 14:54 UTCJun 27, 17:14 UTC2h 20m
2026-06-27 N577PE - Jun 27, 13:04 UTCJun 27, 14:00 UTC55m
2026-06-26 N577PE - Jun 26, 20:34 UTCJun 26, 22:14 UTC1h 40m
2026-06-26 N577PE - Jun 26, 17:15 UTCJun 26, 19:35 UTC2h 20m
2026-06-26 N577PE - Jun 26, 15:39 UTCJun 26, 16:39 UTC1h 0m
2026-06-24 N577PE - Jun 24, 18:55 UTCJun 24, 19:34 UTC40m
2026-06-24 N577PE - Jun 24, 16:24 UTCJun 24, 16:45 UTC20m
2026-06-24 N577PE - Jun 24, 14:09 UTCJun 24, 15:35 UTC1h 25m
2026-06-22 N577PE - Jun 22, 15:40 UTCJun 22, 16:40 UTC1h 0m
2026-06-22 N577PE - Jun 22, 14:24 UTCJun 22, 14:59 UTC35m
2026-06-22 N577PE - Jun 22, 11:50 UTCJun 22, 13:25 UTC1h 35m
2026-06-18 N577PE - Jun 18, 17:21 UTCJun 18, 18:40 UTC1h 19m
2026-06-18 N577PE - Jun 18, 15:40 UTCJun 18, 16:15 UTC35m
2026-06-18 N577PE - Jun 18, 13:05 UTCJun 18, 14:45 UTC1h 40m
2026-06-16 N577PE - Jun 16, 22:30 UTCJun 16, 23:50 UTC1h 20m
2026-06-16 N577PE - Jun 16, 13:00 UTCJun 16, 14:20 UTC1h 20m
2026-06-15 N577PE SAV → TVI Jun 15, 20:50 UTCJun 15, 22:00 UTC1h 10m
2026-06-15 N577PE TVI → SAV Jun 15, 12:00 UTCJun 15, 12:45 UTC45m
2026-06-12 N577PE - Jun 12, 16:55 UTCJun 12, 17:45 UTC50m
2026-06-12 N577PE - Jun 12, 12:20 UTCJun 12, 13:15 UTC55m
2026-06-11 N577PE - Jun 11, 21:20 UTCJun 12, 00:20 UTC3h 0m
2026-06-11 N577PE - Jun 11, 18:05 UTCJun 11, 20:40 UTC2h 35m
2026-06-10 N577PE - Jun 10, 15:45 UTCJun 10, 16:35 UTC50m
2026-06-10 N577PE - Jun 10, 14:20 UTCJun 10, 14:30 UTC10m
2026-06-07 N577PE - Jun 7, 20:40 UTCJun 7, 21:40 UTC1h 0m
2026-06-07 N577PE - Jun 7, 18:30 UTCJun 7, 20:05 UTC1h 35m
2026-06-07 N577PE - Jun 7, 16:30 UTCJun 7, 17:30 UTC1h 0m
2026-06-06 N577PE - Jun 6, 19:44 UTCJun 6, 21:09 UTC1h 25m
2026-06-05 N577PE - Jun 5, 13:15 UTCJun 5, 14:45 UTC1h 30m
2026-06-03 N577PE - Jun 3, 20:30 UTCJun 3, 21:30 UTC1h 0m
2026-06-03 N577PE - Jun 3, 12:15 UTCJun 3, 13:25 UTC1h 10m
2026-06-02 N577PE - Jun 2, 19:55 UTCJun 2, 23:30 UTC3h 35m

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 N577PE page for operator, model, and routing details .

Mode-S A769B4 frequently asked

What is Mode-S code A769B4?
A769B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N577PE.
Where is Mode-S A769B4 registered?
Mode-S code A769B4 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 A769B4 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A769B4, octal 51664664, decimal 10,971,572.
What flights does A769B4 operate?
Mode-S A769B4 has broadcast 1 distinct callsign, including N577PE.