Apparatus

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sensors Mode-S transponder

A79FCF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5900R · CESSNA 172 Skyhawk · operated by REGISTRATION PENDING

Hex
A79FCF
Octal
51717717
Decimal
10,985,423
Country
US
Tail
N5900R
Type
C172
No current signal · last broadcast Jul 26, 05:15 UTC
Flights observed
76
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 05:15 UTC

Last known position

Most recent position reported by Mode-S A79FCF.

Country allocation

The ICAO 24-bit address A79FCF 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
N5900R - 76 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N5900R - Jul 26, 04:00 UTCJul 26, 05:15 UTC1h 15m
2026-07-24 N5900R - Jul 24, 22:40 UTCJul 25, 00:50 UTC2h 10m
2026-07-24 N5900R - Jul 24, 19:30 UTCJul 24, 19:55 UTC25m
2026-07-22 N5900R - Jul 22, 02:05 UTCJul 22, 02:30 UTC25m
2026-07-22 N5900R - Jul 22, 00:35 UTCJul 22, 01:30 UTC55m
2026-07-21 N5900R - Jul 21, 21:15 UTCJul 21, 23:50 UTC2h 35m
2026-07-21 N5900R - Jul 21, 19:25 UTCJul 21, 19:50 UTC25m
2026-07-20 N5900R - Jul 20, 22:25 UTCJul 20, 22:50 UTC25m
2026-07-20 N5900R - Jul 20, 19:40 UTCJul 20, 21:50 UTC2h 10m
2026-07-16 N5900R - Jul 16, 22:15 UTCJul 16, 22:40 UTC25m
2026-07-16 N5900R - Jul 16, 20:29 UTCJul 16, 21:40 UTC1h 10m
2026-07-16 N5900R - Jul 16, 19:25 UTCJul 16, 19:50 UTC25m
2026-07-09 N5900R - Jul 9, 02:50 UTCJul 9, 03:25 UTC35m
2026-06-20 N5900R - Jun 20, 20:49 UTCJun 20, 21:00 UTC10m
2026-06-20 N5900R - Jun 20, 18:29 UTCJun 20, 18:49 UTC20m
2026-06-19 N5900R - Jun 19, 00:45 UTCJun 19, 01:10 UTC25m
2026-06-18 N5900R - Jun 18, 19:20 UTCJun 18, 20:45 UTC1h 25m
2026-06-18 N5900R - Jun 18, 18:20 UTCJun 18, 18:45 UTC25m
2026-06-17 N5900R - Jun 17, 20:55 UTCJun 17, 21:45 UTC50m
2026-06-17 N5900R - Jun 17, 19:30 UTCJun 17, 20:00 UTC30m
2026-06-17 N5900R - Jun 17, 00:35 UTCJun 17, 01:00 UTC25m
2026-06-16 N5900R - Jun 16, 19:35 UTCJun 16, 21:35 UTC2h 1m
2026-06-16 N5900R - Jun 16, 02:40 UTCJun 16, 03:00 UTC20m
2026-06-15 N5900R - Jun 15, 22:25 UTCJun 15, 22:35 UTC10m
2026-06-15 N5900R - Jun 15, 20:40 UTCJun 15, 21:35 UTC55m
2026-06-15 N5900R - Jun 15, 19:39 UTCJun 15, 20:04 UTC25m
2026-06-14 N5900R - Jun 14, 19:55 UTCJun 14, 20:40 UTC45m
2026-06-14 N5900R - Jun 14, 16:10 UTCJun 14, 16:25 UTC15m
2026-06-12 N5900R - Jun 12, 16:35 UTCJun 12, 17:00 UTC25m
2026-06-12 N5900R - Jun 12, 12:30 UTCJun 12, 13:40 UTC1h 10m
2026-06-10 N5900R - Jun 10, 22:40 UTCJun 11, 01:00 UTC2h 20m
2026-06-10 N5900R - Jun 10, 21:40 UTCJun 10, 22:05 UTC25m
2026-06-10 N5900R - Jun 10, 02:25 UTCJun 10, 02:50 UTC25m
2026-05-15 N5900R - May 15, 22:25 UTCMay 15, 22:45 UTC20m
2026-05-15 N5900R - May 15, 19:40 UTCMay 15, 21:50 UTC2h 10m
2026-05-14 N5900R - May 14, 23:40 UTCMay 15, 00:05 UTC25m
2026-05-14 N5900R - May 14, 20:25 UTCMay 14, 21:45 UTC1h 20m
2026-05-14 N5900R - May 14, 19:20 UTCMay 14, 19:50 UTC30m
2026-05-14 N5900R - May 14, 03:15 UTCMay 14, 03:55 UTC40m
2026-05-14 N5900R - May 14, 00:15 UTCMay 14, 00:55 UTC40m
2026-05-12 N5900R - May 12, 22:55 UTCMay 12, 23:25 UTC30m
2026-05-12 N5900R - May 12, 19:30 UTCMay 12, 21:45 UTC2h 15m
2026-05-11 N5900R - May 11, 20:20 UTCMay 11, 21:50 UTC1h 30m
2026-05-11 N5900R - May 11, 19:15 UTCMay 11, 19:40 UTC25m
2026-05-09 N5900R - May 9, 04:10 UTCMay 9, 05:10 UTC1h 0m
2026-05-08 N5900R - May 8, 22:20 UTCMay 8, 22:45 UTC25m
2026-05-08 N5900R - May 8, 21:25 UTCMay 8, 21:40 UTC15m
2026-05-08 N5900R - May 8, 17:30 UTCMay 8, 17:55 UTC25m
2026-05-07 N5900R - May 7, 22:20 UTCMay 7, 22:45 UTC25m
2026-05-07 N5900R - May 7, 20:50 UTCMay 7, 21:45 UTC55m

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 N5900R page for operator, model, and routing details .

Mode-S A79FCF frequently asked

What is Mode-S code A79FCF?
A79FCF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5900R.
Where is Mode-S A79FCF registered?
Mode-S code A79FCF 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 A79FCF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A79FCF, octal 51717717, decimal 10,985,423.
What flights does A79FCF operate?
Mode-S A79FCF has broadcast 1 distinct callsign, including N5900R.