Apparatus

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sensors Mode-S transponder

A4AF0F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4000X · CESSNA 172 Skyhawk · operated by JP SKYWARD LLC

Hex
A4AF0F
Octal
51127417
Decimal
10,792,719
Country
US
Tail
N4000X
Type
C172
No current signal · last broadcast 10d ago
Flights observed
54
Distinct callsigns
1
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S A4AF0F.

Country allocation

The ICAO 24-bit address A4AF0F 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
N4000X - 54 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N4000X - Jul 26, 20:50 UTCJul 26, 21:45 UTC55m
2026-07-26 N4000X - Jul 26, 03:30 UTCJul 26, 04:15 UTC45m
2026-07-26 N4000X - Jul 26, 01:10 UTCJul 26, 01:30 UTC20m
2026-07-24 N4000X - Jul 24, 20:35 UTCJul 24, 21:40 UTC1h 5m
2026-07-24 N4000X - Jul 24, 18:45 UTCJul 24, 20:00 UTC1h 15m
2026-07-24 N4000X CNO → CNO Jul 24, 02:20 UTCJul 24, 03:00 UTC40m
2026-07-24 N4000X SBA → CNO Jul 24, 00:10 UTCJul 24, 01:30 UTC1h 20m
2026-07-23 N4000X - Jul 23, 22:00 UTCJul 23, 23:10 UTC1h 10m
2026-07-22 N4000X - Jul 22, 18:45 UTCJul 22, 19:30 UTC45m
2026-07-22 N4000X - Jul 22, 03:45 UTCJul 22, 03:55 UTC10m
2026-07-22 N4000X CNO → CNO Jul 22, 01:10 UTCJul 22, 02:45 UTC1h 35m
2026-07-21 N4000X - Jul 21, 22:30 UTCJul 21, 23:15 UTC45m
2026-07-20 N4000X - Jul 20, 21:55 UTCJul 21, 00:10 UTC2h 15m
2026-07-18 N4000X - Jul 18, 03:00 UTCJul 18, 03:55 UTC55m
2026-07-16 N4000X LPC → CNO Jul 16, 21:55 UTCJul 16, 23:29 UTC1h 35m
2026-07-16 N4000X - Jul 16, 16:44 UTCJul 16, 18:15 UTC1h 30m
2026-07-15 N4000X CNO → CNO Jul 15, 22:30 UTCJul 16, 01:45 UTC3h 15m
2026-07-15 N4000X - Jul 15, 19:55 UTCJul 15, 20:10 UTC15m
2026-07-15 N4000X CNO → CNO Jul 15, 17:30 UTCJul 15, 17:50 UTC20m
2026-07-11 N4000X - Jul 11, 19:35 UTCJul 11, 19:55 UTC20m
2026-07-11 N4000X CNO → CNO Jul 11, 17:50 UTCJul 11, 18:40 UTC50m
2026-07-11 N4000X CNO → CNO Jul 11, 02:25 UTCJul 11, 03:10 UTC45m
2026-07-10 N4000X CNO → CNO Jul 10, 23:35 UTCJul 11, 00:25 UTC50m
2026-07-10 N4000X CNO → CNO Jul 10, 22:20 UTCJul 10, 22:50 UTC30m
2026-07-10 N4000X CNO → CNO Jul 10, 20:55 UTCJul 10, 21:05 UTC10m
2026-07-09 N4000X CNO → CNO Jul 9, 03:10 UTCJul 9, 04:10 UTC1h 0m
2026-07-09 N4000X - Jul 9, 01:35 UTCJul 9, 02:30 UTC55m
2026-07-08 N4000X - Jul 8, 23:45 UTCJul 9, 00:25 UTC40m
2026-07-08 N4000X - Jul 8, 17:35 UTCJul 8, 18:20 UTC45m
2026-07-07 N4000X - Jul 7, 17:05 UTCJul 7, 17:55 UTC50m
2026-07-06 N4000X - Jul 6, 20:00 UTCJul 6, 21:10 UTC1h 10m
2026-07-06 N4000X - Jul 6, 16:45 UTCJul 6, 17:50 UTC1h 5m
2026-07-05 N4000X - Jul 5, 00:00 UTCJul 5, 01:50 UTC1h 50m
2026-07-03 N4000X CNO → CNO Jul 3, 22:15 UTCJul 3, 23:05 UTC50m
2026-07-02 N4000X CNO → CNO Jul 2, 04:00 UTCJul 2, 05:00 UTC1h 0m
2026-07-02 N4000X - Jul 2, 00:05 UTCJul 2, 02:10 UTC2h 5m
2026-06-23 N4000X CNO → CNO Jun 23, 23:24 UTCJun 24, 01:30 UTC2h 5m
2026-06-22 N4000X - Jun 22, 15:50 UTCJun 22, 16:05 UTC15m
2026-06-22 N4000X - Jun 22, 14:29 UTCJun 22, 14:49 UTC20m
2026-06-22 N4000X - Jun 22, 01:00 UTCJun 22, 02:40 UTC1h 40m
2026-06-21 N4000X - Jun 21, 17:15 UTCJun 21, 19:50 UTC2h 35m
2026-06-20 N4000X - Jun 20, 21:40 UTCJun 20, 22:30 UTC50m
2026-06-20 N4000X - Jun 20, 20:05 UTCJun 20, 21:00 UTC55m
2026-06-20 N4000X - Jun 20, 01:44 UTCJun 20, 03:14 UTC1h 30m
2026-06-19 N4000X - Jun 19, 22:39 UTCJun 19, 23:29 UTC50m
2026-06-19 N4000X CNO → CNO Jun 19, 19:59 UTCJun 19, 21:30 UTC1h 30m
2026-06-19 N4000X - Jun 19, 01:45 UTCJun 19, 02:29 UTC45m
2026-06-18 N4000X CNO → CNO Jun 18, 20:05 UTCJun 18, 21:45 UTC1h 40m
2026-06-18 N4000X - Jun 18, 02:50 UTCJun 18, 03:10 UTC20m
2026-06-18 N4000X CNO → CNO Jun 18, 01:30 UTCJun 18, 01:50 UTC20m

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 N4000X page for operator, model, and routing details .

Mode-S A4AF0F frequently asked

What is Mode-S code A4AF0F?
A4AF0F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4000X.
Where is Mode-S A4AF0F registered?
Mode-S code A4AF0F 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 A4AF0F broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4AF0F, octal 51127417, decimal 10,792,719.
What flights does A4AF0F operate?
Mode-S A4AF0F has broadcast 1 distinct callsign, including N4000X.