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sensors Mode-S transponder

A5C973

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N472KK · operated by AIRPLANE FACTORY INC

Hex
A5C973
Octal
51344563
Decimal
10,865,011
Country
US
Tail
N472KK
Type
SLG4
No current signal · last broadcast 2h ago
Flights observed
147
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A5C973.

Country allocation

The ICAO 24-bit address A5C973 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
N472KK - 147 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N472KK LLY → LLY Jul 14, 13:00 UTCJul 14, 13:55 UTC55m
2026-07-13 N472KK LLY → LLY Jul 13, 17:15 UTCJul 13, 17:50 UTC35m
2026-07-13 N472KK LLY → LLY Jul 13, 16:50 UTCJul 13, 17:05 UTC15m
2026-07-13 N472KK - Jul 13, 14:40 UTCJul 13, 15:25 UTC45m
2026-07-13 N472KK LLY → LLY Jul 13, 12:30 UTCJul 13, 13:15 UTC45m
2026-07-10 N472KK LLY → LLY Jul 10, 18:35 UTCJul 10, 18:45 UTC10m
2026-07-10 N472KK - Jul 10, 17:45 UTCJul 10, 18:25 UTC40m
2026-07-10 N472KK - Jul 10, 16:50 UTCJul 10, 17:05 UTC15m
2026-07-10 N472KK LLY → LLY Jul 10, 15:55 UTCJul 10, 16:35 UTC40m
2026-07-10 N472KK - Jul 10, 13:45 UTCJul 10, 14:45 UTC1h 0m
2026-06-24 N472KK - Jun 24, 17:34 UTCJun 24, 18:05 UTC30m
2026-06-19 N472KK - Jun 19, 12:25 UTCJun 19, 12:54 UTC30m
2026-06-17 N472KK - Jun 17, 21:20 UTCJun 17, 21:45 UTC25m
2026-06-17 N472KK - Jun 17, 20:05 UTCJun 17, 20:45 UTC40m
2026-06-17 N472KK - Jun 17, 17:50 UTCJun 17, 18:50 UTC1h 0m
2026-06-17 N472KK - Jun 17, 16:20 UTCJun 17, 17:00 UTC40m
2026-06-17 N472KK - Jun 17, 14:10 UTCJun 17, 14:40 UTC30m
2026-06-17 N472KK - Jun 17, 11:25 UTCJun 17, 11:45 UTC20m
2026-06-16 N472KK LLY → LLY Jun 16, 21:45 UTCJun 16, 22:25 UTC40m
2026-06-16 N472KK LLY → LLY Jun 16, 19:40 UTCJun 16, 20:50 UTC1h 11m
2026-06-16 N472KK LLY → LLY Jun 16, 18:09 UTCJun 16, 18:55 UTC45m
2026-06-16 N472KK LLY → LLY Jun 16, 15:24 UTCJun 16, 16:15 UTC50m
2026-06-16 N472KK LLY → LLY Jun 16, 13:04 UTCJun 16, 14:00 UTC55m
2026-06-15 N472KK - Jun 15, 20:34 UTCJun 15, 22:30 UTC1h 55m
2026-06-14 N472KK LLY → LLY Jun 14, 14:45 UTCJun 14, 17:00 UTC2h 15m
2026-06-14 N472KK - Jun 14, 13:05 UTCJun 14, 14:05 UTC1h 0m
2026-06-13 N472KK - Jun 13, 22:15 UTCJun 14, 00:05 UTC1h 50m
2026-06-13 N472KK - Jun 13, 20:50 UTCJun 13, 21:20 UTC30m
2026-06-13 N472KK - Jun 13, 17:45 UTCJun 13, 19:45 UTC2h 0m
2026-06-13 N472KK - Jun 13, 16:10 UTCJun 13, 16:40 UTC30m
2026-06-12 N472KK - Jun 12, 19:15 UTCJun 12, 19:40 UTC25m
2026-06-10 N472KK - Jun 10, 00:35 UTCJun 10, 01:00 UTC25m
2026-06-08 N472KK LLY → LLY Jun 8, 19:35 UTCJun 8, 21:30 UTC1h 55m
2026-06-07 N472KK LLY → LLY Jun 7, 17:40 UTCJun 7, 18:10 UTC30m
2026-06-07 N472KK LLY → LLY Jun 7, 16:45 UTCJun 7, 17:00 UTC15m
2026-06-06 N472KK LLY → LLY Jun 6, 19:50 UTCJun 6, 20:30 UTC40m
2026-06-06 N472KK LLY → LLY Jun 6, 16:04 UTCJun 6, 16:45 UTC40m
2026-06-05 N472KK LLY → LLY Jun 5, 22:55 UTCJun 5, 23:25 UTC30m
2026-06-05 N472KK LLY → LLY Jun 5, 18:05 UTCJun 5, 19:25 UTC1h 20m
2026-06-05 N472KK - Jun 5, 15:55 UTCJun 5, 16:50 UTC55m
2026-06-05 N472KK LLY → LLY Jun 5, 13:15 UTCJun 5, 14:05 UTC50m
2026-06-04 N472KK LLY → LLY Jun 4, 22:40 UTCJun 5, 00:40 UTC2h 0m
2026-06-04 N472KK - Jun 4, 18:35 UTCJun 4, 19:05 UTC30m
2026-06-04 N472KK - Jun 4, 16:15 UTCJun 4, 17:40 UTC1h 25m
2026-06-04 N472KK - Jun 4, 11:10 UTCJun 4, 12:05 UTC55m
2026-06-03 N472KK LLY → LLY Jun 3, 23:00 UTCJun 4, 00:05 UTC1h 5m
2026-06-03 N472KK LLY → LLY Jun 3, 21:00 UTCJun 3, 21:45 UTC45m
2026-06-03 N472KK LLY → LLY Jun 3, 16:00 UTCJun 3, 17:15 UTC1h 15m
2026-06-03 N472KK - Jun 3, 13:35 UTCJun 3, 14:20 UTC45m
2026-06-02 N472KK LLY → LLY Jun 2, 23:00 UTCJun 3, 00:30 UTC1h 30m

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 N472KK page for operator, model, and routing details .

Mode-S A5C973 frequently asked

What is Mode-S code A5C973?
A5C973 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N472KK.
Where is Mode-S A5C973 registered?
Mode-S code A5C973 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 A5C973 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 A5C973, octal 51344563, decimal 10,865,011.
What flights does A5C973 operate?
Mode-S A5C973 has broadcast 1 distinct callsign, including N472KK.