Apparatus

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sensors Mode-S transponder

A5D4AF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N475LH · operated by PILATUS BUSINESS AIRCRAFT LTD

Hex
A5D4AF
Octal
51352257
Decimal
10,867,887
Country
US
Tail
N475LH
Type
PC12
No current signal · last broadcast 2h ago
Flights observed
234
Distinct callsigns
16
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A5D4AF.

Country allocation

The ICAO 24-bit address A5D4AF 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 16 distinct

Callsign Airline Flights Last seen
SKQ22 - 44 2026-07-14
SKQ25 - 35 2026-07-10
SKQ55 - 23 2026-06-19
SKQ48 - 21 2026-06-18
SKQ53 - 20 2026-06-21
SKQ45 - 16 2026-06-13
SKQ69 - 14 2026-06-19
SKQ78 - 13 2026-06-30
SKQ74 - 9 2026-06-18
SKQ65 - 9 2026-06-19
SKQ61 - 8 2026-05-01
SKQ56 - 6 2026-07-12
SKQ34 - 6 2026-05-06
SKQ303 - 4 2026-04-26
SKQ85 - 3 2026-06-22
SKQ77 - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKQ22 - Jul 14, 06:15 UTCJul 14, 07:50 UTC1h 35m
2026-07-14 SKQ22 - Jul 14, 01:50 UTCJul 14, 04:30 UTC2h 40m
2026-07-14 SKQ22 - Jul 14, 00:05 UTCJul 14, 01:10 UTC1h 5m
2026-07-12 SKQ56 - Jul 12, 04:55 UTCJul 12, 06:01 UTC1h 5m
2026-07-12 SKQ56 - Jul 12, 02:50 UTCJul 12, 04:01 UTC1h 10m
2026-07-12 SKQ56 - Jul 12, 00:50 UTCJul 12, 02:15 UTC1h 25m
2026-07-11 SKQ22 - Jul 11, 07:10 UTCJul 11, 08:40 UTC1h 30m
2026-07-11 SKQ22 - Jul 11, 03:50 UTCJul 11, 06:35 UTC2h 45m
2026-07-11 SKQ22 - Jul 11, 02:10 UTCJul 11, 03:15 UTC1h 5m
2026-07-10 SKQ22 OSU → PWK Jul 10, 22:00 UTCJul 10, 23:20 UTC1h 20m
2026-07-10 SKQ25 - Jul 10, 08:35 UTCJul 10, 11:10 UTC2h 35m
2026-07-10 SKQ25 - Jul 10, 05:05 UTCJul 10, 07:55 UTC2h 50m
2026-07-10 SKQ25 - Jul 10, 03:45 UTCJul 10, 04:35 UTC50m
2026-07-10 SKQ25 - Jul 10, 01:05 UTCJul 10, 02:30 UTC1h 25m
2026-07-09 SKQ22 - Jul 9, 06:10 UTCJul 9, 07:30 UTC1h 20m
2026-07-09 SKQ22 PWK → STL Jul 9, 02:00 UTCJul 9, 04:55 UTC2h 55m
2026-07-09 SKQ22 - Jul 9, 00:05 UTCJul 9, 01:10 UTC1h 5m
2026-07-08 SKQ25 PWK → OSU Jul 8, 07:35 UTCJul 8, 08:40 UTC1h 5m
2026-07-08 SKQ25 - Jul 8, 04:15 UTCJul 8, 06:30 UTC2h 15m
2026-07-08 SKQ25 - Jul 8, 03:00 UTCJul 8, 03:45 UTC45m
2026-07-08 SKQ25 - Jul 8, 00:50 UTCJul 8, 02:10 UTC1h 20m
2026-07-07 SKQ22 - Jul 7, 05:40 UTCJul 7, 07:05 UTC1h 25m
2026-07-07 SKQ22 - Jul 7, 01:45 UTCJul 7, 04:40 UTC2h 55m
2026-07-06 SKQ22 - Jul 6, 23:50 UTCJul 7, 00:55 UTC1h 5m
2026-07-04 SKQ25 - Jul 4, 02:40 UTCJul 4, 04:40 UTC2h 0m
2026-07-04 SKQ25 - Jul 4, 01:00 UTCJul 4, 02:25 UTC1h 25m
2026-07-03 SKQ22 - Jul 3, 06:55 UTCJul 3, 07:45 UTC50m
2026-07-03 SKQ22 PWK → STL Jul 3, 05:00 UTCJul 3, 06:25 UTC1h 25m
2026-07-02 SKQ22 - Jul 2, 23:55 UTCJul 3, 01:05 UTC1h 10m
2026-07-02 SKQ25 - Jul 2, 07:35 UTCJul 2, 08:35 UTC1h 0m
2026-07-02 SKQ25 - Jul 2, 02:45 UTCJul 2, 06:00 UTC3h 15m
2026-07-02 SKQ25 - Jul 2, 00:30 UTCJul 2, 02:00 UTC1h 30m
2026-07-01 SKQ25 - Jul 1, 07:45 UTCJul 1, 08:45 UTC1h 0m
2026-07-01 SKQ25 - Jul 1, 04:30 UTCJul 1, 06:45 UTC2h 15m
2026-07-01 SKQ25 PAH → SDF Jul 1, 03:15 UTCJul 1, 04:00 UTC45m
2026-07-01 SKQ25 - Jul 1, 00:55 UTCJul 1, 02:20 UTC1h 25m
2026-06-30 SKQ78 - Jun 30, 10:05 UTCJun 30, 11:55 UTC1h 50m
2026-06-22 SKQ85 - Jun 22, 03:45 UTCJun 22, 04:30 UTC45m
2026-06-22 SKQ85 - Jun 22, 01:00 UTCJun 22, 01:49 UTC50m
2026-06-21 SKQ85 - Jun 21, 23:00 UTCJun 22, 00:34 UTC1h 35m
2026-06-21 SKQ53 - Jun 21, 12:24 UTCJun 21, 13:50 UTC1h 25m
2026-06-21 SKQ53 - Jun 21, 10:14 UTCJun 21, 11:49 UTC1h 35m
2026-06-21 SKQ77 - Jun 21, 05:00 UTCJun 21, 05:44 UTC45m
2026-06-21 SKQ77 - Jun 21, 04:14 UTCJun 21, 04:39 UTC25m
2026-06-21 SKQ77 - Jun 21, 01:10 UTCJun 21, 02:30 UTC1h 20m
2026-06-20 SKQ53 - Jun 20, 12:45 UTCJun 20, 13:44 UTC1h 0m
2026-06-20 SKQ53 - Jun 20, 10:15 UTCJun 20, 11:44 UTC1h 30m
2026-06-19 SKQ55 - Jun 19, 23:00 UTCJun 20, 02:59 UTC4h 0m
2026-06-19 SKQ55 - Jun 19, 21:44 UTCJun 19, 22:14 UTC30m
2026-06-19 SKQ55 - Jun 19, 19:59 UTCJun 19, 21:04 UTC1h 5m

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 N475LH page for operator, model, and routing details .

Mode-S A5D4AF frequently asked

What is Mode-S code A5D4AF?
A5D4AF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N475LH.
Where is Mode-S A5D4AF registered?
Mode-S code A5D4AF 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 A5D4AF broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5D4AF, octal 51352257, decimal 10,867,887.
What flights does A5D4AF operate?
Mode-S A5D4AF has broadcast 16 distinct callsigns, including SKQ22, SKQ25, SKQ55, SKQ48, SKQ53.