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sensors Mode-S transponder

A654D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N507KC · operated by KLM AIRPLANE LLC

Hex
A654D5
Octal
51452325
Decimal
10,900,693
Country
US
Tail
N507KC
Type
RV12
No current signal · last broadcast 7h ago
Flights observed
136
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A654D5.

Country allocation

The ICAO 24-bit address A654D5 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
N507KC - 136 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N507KC HWO → HWO Jul 22, 12:35 UTCJul 22, 13:55 UTC1h 20m
2026-07-21 N507KC - Jul 21, 17:35 UTCJul 21, 18:45 UTC1h 10m
2026-07-21 N507KC - Jul 21, 15:25 UTCJul 21, 16:35 UTC1h 10m
2026-07-20 N507KC HWO → HWO Jul 20, 16:45 UTCJul 20, 17:20 UTC35m
2026-07-19 N507KC HWO → HWO Jul 19, 13:45 UTCJul 19, 15:10 UTC1h 25m
2026-07-17 N507KC - Jul 17, 17:20 UTCJul 17, 18:25 UTC1h 5m
2026-07-17 N507KC HWO → HWO Jul 17, 12:30 UTCJul 17, 14:00 UTC1h 30m
2026-07-16 N507KC HWO → HWO Jul 16, 16:30 UTCJul 16, 17:05 UTC35m
2026-07-16 N507KC - Jul 16, 13:40 UTCJul 16, 15:00 UTC1h 20m
2026-07-16 N507KC HWO → HWO Jul 16, 12:14 UTCJul 16, 12:55 UTC40m
2026-07-16 N507KC - Jul 16, 02:20 UTCJul 16, 02:55 UTC35m
2026-07-16 N507KC - Jul 16, 01:05 UTCJul 16, 01:40 UTC35m
2026-07-15 N507KC HWO → HWO Jul 15, 20:55 UTCJul 15, 21:20 UTC25m
2026-07-14 N507KC - Jul 14, 15:45 UTCJul 14, 16:15 UTC30m
2026-07-14 N507KC - Jul 14, 11:45 UTCJul 14, 12:15 UTC30m
2026-07-13 N507KC - Jul 13, 16:10 UTCJul 13, 17:10 UTC1h 0m
2026-07-12 N507KC HWO → HWO Jul 12, 21:00 UTCJul 12, 21:50 UTC50m
2026-07-12 N507KC - Jul 12, 17:30 UTCJul 12, 18:05 UTC35m
2026-07-12 N507KC HWO → HWO Jul 12, 15:45 UTCJul 12, 16:20 UTC35m
2026-07-11 N507KC HWO → HWO Jul 11, 15:20 UTCJul 11, 16:35 UTC1h 15m
2026-07-11 N507KC - Jul 11, 12:50 UTCJul 11, 13:15 UTC25m
2026-07-10 N507KC HWO → HWO Jul 10, 16:00 UTCJul 10, 16:40 UTC40m
2026-07-09 N507KC - Jul 9, 14:00 UTCJul 9, 14:55 UTC55m
2026-07-09 N507KC - Jul 9, 12:00 UTCJul 9, 12:55 UTC55m
2026-07-08 N507KC - Jul 8, 13:40 UTCJul 8, 14:40 UTC1h 0m
2026-07-07 N507KC - Jul 7, 16:40 UTCJul 7, 17:35 UTC55m
2026-07-07 N507KC - Jul 7, 13:50 UTCJul 7, 14:40 UTC50m
2026-07-07 N507KC - Jul 7, 11:40 UTCJul 7, 12:35 UTC55m
2026-07-06 N507KC - Jul 6, 14:25 UTCJul 6, 15:20 UTC55m
2026-07-06 N507KC HWO → HWO Jul 6, 11:45 UTCJul 6, 12:40 UTC55m
2026-07-04 N507KC HWO → HWO Jul 4, 13:00 UTCJul 4, 13:50 UTC50m
2026-07-03 N507KC - Jul 3, 14:10 UTCJul 3, 14:35 UTC25m
2026-07-03 N507KC HWO → HWO Jul 3, 11:45 UTCJul 3, 13:05 UTC1h 20m
2026-07-02 N507KC HWO → HWO Jul 2, 18:45 UTCJul 2, 19:00 UTC15m
2026-07-02 N507KC HWO → HWO Jul 2, 11:40 UTCJul 2, 12:35 UTC55m
2026-07-01 N507KC - Jul 1, 14:00 UTCJul 1, 15:05 UTC1h 5m
2026-06-30 N507KC HWO → HWO Jun 30, 13:35 UTCJun 30, 14:55 UTC1h 20m
2026-06-30 N507KC HWO → HWO Jun 30, 01:19 UTCJun 30, 02:05 UTC46m
2026-06-29 N507KC HWO → HWO Jun 29, 23:09 UTCJun 29, 23:29 UTC20m
2026-06-28 N507KC - Jun 28, 15:20 UTCJun 28, 15:44 UTC25m
2026-06-28 N507KC - Jun 28, 14:25 UTCJun 28, 14:50 UTC25m
2026-06-27 N507KC - Jun 27, 16:00 UTCJun 27, 16:20 UTC20m
2026-06-22 N507KC HWO → HWO Jun 22, 20:49 UTCJun 22, 21:30 UTC40m
2026-06-22 N507KC - Jun 22, 14:14 UTCJun 22, 14:55 UTC40m
2026-06-21 N507KC - Jun 21, 14:54 UTCJun 21, 15:19 UTC25m
2026-06-21 N507KC HWO → HWO Jun 21, 13:44 UTCJun 21, 14:10 UTC25m
2026-06-18 N507KC HWO → HWO Jun 18, 21:10 UTCJun 18, 21:20 UTC10m
2026-06-18 N507KC - Jun 18, 16:05 UTCJun 18, 16:35 UTC30m
2026-06-16 N507KC HWO → HWO Jun 16, 15:35 UTCJun 16, 15:55 UTC20m
2026-06-15 N507KC HWO → HWO Jun 15, 17:54 UTCJun 15, 18:20 UTC25m

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 N507KC page for operator, model, and routing details .

Mode-S A654D5 frequently asked

What is Mode-S code A654D5?
A654D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N507KC.
Where is Mode-S A654D5 registered?
Mode-S code A654D5 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 A654D5 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A654D5, octal 51452325, decimal 10,900,693.
What flights does A654D5 operate?
Mode-S A654D5 has broadcast 1 distinct callsign, including N507KC.