Apparatus

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sensors Mode-S transponder

A023B9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N108PH · DASSAULT Falcon 900 · operated by YOUNG FAMILY AVIATION LLC

Hex
A023B9
Octal
50021671
Decimal
10,494,905
Country
US
Tail
N108PH
Type
F900
No current signal · last broadcast 22h ago
Flights observed
100
Distinct callsigns
1
Country
US
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S A023B9.

Country allocation

The ICAO 24-bit address A023B9 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
WDY108 - 100 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 WDY108 - Jul 13, 15:15 UTCJul 13, 17:45 UTC2h 30m
2026-07-12 WDY108 - Jul 12, 20:05 UTCJul 12, 22:20 UTC2h 15m
2026-07-12 WDY108 - Jul 12, 18:15 UTCJul 12, 19:10 UTC55m
2026-07-12 WDY108 - Jul 12, 16:05 UTCJul 12, 16:45 UTC40m
2026-06-30 WDY108 - Jun 30, 04:35 UTCJun 30, 06:45 UTC2h 10m
2026-06-30 WDY108 - Jun 30, 01:50 UTCJun 30, 03:50 UTC2h 0m
2026-06-29 WDY108 - Jun 29, 20:04 UTCJun 30, 00:45 UTC4h 40m
2026-06-29 WDY108 - Jun 29, 15:34 UTCJun 29, 18:49 UTC3h 15m
2026-06-28 WDY108 - Jun 28, 18:55 UTCJun 28, 20:34 UTC1h 40m
2026-06-28 WDY108 - Jun 28, 16:25 UTCJun 28, 17:39 UTC1h 15m
2026-06-26 WDY108 - Jun 26, 01:24 UTCJun 26, 01:34 UTC10m
2026-06-25 WDY108 - Jun 25, 23:39 UTCJun 26, 00:35 UTC55m
2026-06-25 WDY108 - Jun 25, 20:14 UTCJun 25, 20:30 UTC15m
2026-06-25 WDY108 - Jun 25, 18:04 UTCJun 25, 19:29 UTC1h 25m
2026-06-25 WDY108 - Jun 25, 14:59 UTCJun 25, 16:39 UTC1h 40m
2026-06-23 WDY108 - Jun 23, 19:50 UTCJun 24, 00:49 UTC5h 0m
2026-06-23 WDY108 - Jun 23, 18:04 UTCJun 23, 19:00 UTC55m
2026-06-21 WDY108 - Jun 21, 20:09 UTCJun 22, 00:50 UTC4h 40m
2026-06-21 WDY108 - Jun 21, 17:54 UTCJun 21, 19:09 UTC1h 15m
2026-06-20 WDY108 - Jun 20, 11:59 UTCJun 20, 15:49 UTC3h 50m
2026-06-19 WDY108 - Jun 19, 21:04 UTCJun 19, 21:34 UTC30m
2026-06-19 WDY108 - Jun 19, 15:24 UTCJun 19, 20:09 UTC4h 45m
2026-06-18 WDY108 AUS → MDW Jun 18, 16:00 UTCJun 18, 18:05 UTC2h 5m
2026-06-17 WDY108 DFW → AUS Jun 17, 22:55 UTCJun 17, 23:25 UTC30m
2026-06-17 WDY108 AUS → DFW Jun 17, 17:10 UTCJun 17, 17:55 UTC45m
2026-06-16 WDY108 - Jun 16, 08:44 UTCJun 16, 09:15 UTC30m
2026-06-16 WDY108 - Jun 16, 05:45 UTCJun 16, 08:05 UTC2h 20m
2026-06-15 WDY108 - Jun 15, 05:04 UTCJun 15, 06:04 UTC1h 0m
2026-06-13 WDY108 CLD → STS Jun 13, 05:20 UTCJun 13, 06:40 UTC1h 20m
2026-06-11 WDY108 - Jun 11, 15:10 UTCJun 11, 19:10 UTC4h 0m
2026-06-11 WDY108 - Jun 11, 12:55 UTCJun 11, 13:10 UTC15m
2026-06-09 WDY108 - Jun 9, 22:55 UTCJun 9, 23:05 UTC10m
2026-06-09 WDY108 - Jun 9, 20:35 UTCJun 9, 22:05 UTC1h 30m
2026-06-09 WDY108 ATL → BNA Jun 9, 18:20 UTCJun 9, 19:05 UTC45m
2026-06-09 WDY108 - Jun 9, 06:10 UTCJun 9, 10:15 UTC4h 5m
2026-06-09 WDY108 - Jun 9, 03:35 UTCJun 9, 05:00 UTC1h 25m
2026-06-05 WDY108 MCO → MYH Jun 5, 14:30 UTCJun 5, 18:30 UTC4h 0m
2026-06-04 WDY108 - Jun 4, 23:50 UTCJun 5, 00:55 UTC1h 5m
2026-06-04 WDY108 - Jun 4, 19:10 UTCJun 4, 22:40 UTC3h 30m
2026-06-04 WDY108 COE → SLC Jun 4, 16:55 UTCJun 4, 18:05 UTC1h 10m
2026-06-03 WDY108 SBA → COE Jun 3, 18:20 UTCJun 3, 20:30 UTC2h 10m
2026-06-03 WDY108 CLD → SBA Jun 3, 14:20 UTCJun 3, 15:00 UTC40m
2026-06-02 WDY108 DEN → CLD Jun 2, 19:25 UTCJun 2, 21:25 UTC2h 0m
2026-06-01 WDY108 - Jun 1, 13:30 UTCJun 1, 17:15 UTC3h 45m
2026-06-01 WDY108 MCO → FXE Jun 1, 11:10 UTCJun 1, 11:45 UTC35m
2026-05-31 WDY108 - May 31, 15:15 UTCMay 31, 18:50 UTC3h 35m
2026-05-30 WDY108 - May 30, 20:00 UTCMay 30, 20:55 UTC55m
2026-05-30 WDY108 - May 30, 16:45 UTCMay 30, 17:50 UTC1h 5m
2026-05-27 WDY108 - May 27, 22:25 UTCMay 27, 22:40 UTC15m
2026-05-27 WDY108 - May 27, 18:40 UTCMay 27, 21:15 UTC2h 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 N108PH page for operator, model, and routing details .

Mode-S A023B9 frequently asked

What is Mode-S code A023B9?
A023B9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N108PH.
Where is Mode-S A023B9 registered?
Mode-S code A023B9 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 A023B9 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A023B9, octal 50021671, decimal 10,494,905.
What flights does A023B9 operate?
Mode-S A023B9 has broadcast 1 distinct callsign, including WDY108.