Apparatus

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sensors Mode-S transponder

A56C4F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N449CS · CESSNA 172 Skyhawk · operated by HORIZON FLIGHT CENTER LLC

Hex
A56C4F
Octal
51266117
Decimal
10,841,167
Country
US
Tail
N449CS
Type
C172
No current signal · last broadcast 1d ago
Flights observed
59
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A56C4F.

Country allocation

The ICAO 24-bit address A56C4F 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
N449CS - 59 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-11 N449CS - Jun 11, 20:40 UTCJun 11, 21:50 UTC1h 10m
2026-06-11 N449CS - Jun 11, 14:45 UTCJun 11, 15:50 UTC1h 5m
2026-06-10 N449CS - Jun 10, 18:45 UTCJun 10, 19:50 UTC1h 5m
2026-06-09 N449CS - Jun 9, 17:35 UTCJun 9, 19:05 UTC1h 30m
2026-06-07 N449CS - Jun 7, 18:45 UTCJun 7, 19:15 UTC30m
2026-06-06 N449CS - Jun 6, 13:09 UTCJun 6, 13:44 UTC35m
2026-06-05 N449CS - Jun 5, 18:35 UTCJun 5, 19:55 UTC1h 20m
2026-06-05 N449CS - Jun 5, 16:35 UTCJun 5, 17:40 UTC1h 5m
2026-06-05 N449CS - Jun 5, 14:55 UTCJun 5, 15:35 UTC40m
2026-06-04 N449CS - Jun 4, 12:50 UTCJun 4, 13:35 UTC45m
2026-06-03 N449CS - Jun 3, 18:40 UTCJun 3, 19:40 UTC1h 0m
2026-06-01 N449CS - Jun 1, 22:40 UTCJun 1, 23:40 UTC1h 0m
2026-06-01 N449CS - Jun 1, 15:00 UTCJun 1, 17:20 UTC2h 20m
2026-05-31 N449CS - May 31, 16:55 UTCMay 31, 17:30 UTC35m
2026-05-30 N449CS - May 30, 18:40 UTCMay 30, 19:45 UTC1h 5m
2026-05-30 N449CS - May 30, 12:55 UTCMay 30, 14:00 UTC1h 5m
2026-05-29 N449CS - May 29, 20:35 UTCMay 29, 20:55 UTC20m
2026-05-29 N449CS - May 29, 19:50 UTCMay 29, 20:05 UTC15m
2026-05-29 N449CS - May 29, 18:45 UTCMay 29, 19:15 UTC30m
2026-05-29 N449CS - May 29, 14:35 UTCMay 29, 15:40 UTC1h 5m
2026-05-28 N449CS - May 28, 20:55 UTCMay 28, 23:30 UTC2h 35m
2026-05-25 N449CS - May 25, 14:55 UTCMay 25, 15:10 UTC15m
2026-04-30 N449CS - Apr 30, 18:45 UTCApr 30, 19:50 UTC1h 5m
2026-04-30 N449CS - Apr 30, 17:20 UTCApr 30, 17:55 UTC35m
2026-04-30 N449CS - Apr 30, 16:55 UTCApr 30, 17:05 UTC10m
2026-04-30 N449CS - Apr 30, 14:35 UTCApr 30, 15:20 UTC45m
2026-04-29 N449CS - Apr 29, 18:50 UTCApr 29, 19:40 UTC50m
2026-04-29 N449CS - Apr 29, 14:40 UTCApr 29, 15:45 UTC1h 5m
2026-04-29 N449CS - Apr 29, 00:50 UTCApr 29, 01:54 UTC1h 5m
2026-04-28 N449CS - Apr 28, 20:50 UTCApr 28, 21:45 UTC55m
2026-04-28 N449CS - Apr 28, 18:35 UTCApr 28, 19:50 UTC1h 15m
2026-04-28 N449CS - Apr 28, 15:10 UTCApr 28, 15:45 UTC35m
2026-04-28 N449CS - Apr 28, 01:00 UTCApr 28, 02:40 UTC1h 40m
2026-04-27 N449CS - Apr 27, 18:35 UTCApr 27, 19:30 UTC55m
2026-04-25 N449CS - Apr 25, 17:10 UTCApr 25, 18:00 UTC50m
2026-04-25 N449CS - Apr 25, 14:55 UTCApr 25, 16:00 UTC1h 5m
2026-04-25 N449CS - Apr 25, 12:50 UTCApr 25, 13:55 UTC1h 5m
2026-04-24 N449CS - Apr 24, 14:50 UTCApr 24, 16:00 UTC1h 10m
2026-04-23 N449CS - Apr 23, 22:30 UTCApr 23, 23:35 UTC1h 5m
2026-04-23 N449CS - Apr 23, 16:55 UTCApr 23, 17:50 UTC55m
2026-04-23 N449CS - Apr 23, 14:40 UTCApr 23, 15:45 UTC1h 5m
2026-04-22 N449CS - Apr 22, 21:30 UTCApr 22, 22:00 UTC30m
2026-04-22 N449CS - Apr 22, 19:10 UTCApr 22, 19:35 UTC25m
2026-04-22 N449CS - Apr 22, 12:50 UTCApr 22, 13:35 UTC45m
2026-04-21 N449CS - Apr 21, 20:30 UTCApr 21, 21:40 UTC1h 10m
2026-04-17 N449CS - Apr 17, 21:25 UTCApr 17, 21:55 UTC30m
2026-04-17 N449CS - Apr 17, 20:55 UTCApr 17, 21:20 UTC25m
2026-04-17 N449CS - Apr 17, 18:30 UTCApr 17, 19:20 UTC50m
2026-04-17 N449CS - Apr 17, 13:20 UTCApr 17, 13:45 UTC25m
2026-04-17 N449CS - Apr 17, 13:00 UTCApr 17, 13:15 UTC15m

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 N449CS page for operator, model, and routing details .

Mode-S A56C4F frequently asked

What is Mode-S code A56C4F?
A56C4F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N449CS.
Where is Mode-S A56C4F registered?
Mode-S code A56C4F 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 A56C4F broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A56C4F, octal 51266117, decimal 10,841,167.
What flights does A56C4F operate?
Mode-S A56C4F has broadcast 1 distinct callsign, including N449CS.