Apparatus

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sensors Mode-S transponder

A4FC94

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N420KV · LEARJET 60 · operated by TROPICANA BUILDING II LLC, BOWLING CONSTRUCTION LLC

Hex
A4FC94
Octal
51176224
Decimal
10,812,564
Country
US
Tail
N420KV
Type
LJ60
No current signal · last broadcast 18h ago
Flights observed
140
Distinct callsigns
2
Country
US
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S A4FC94.

Country allocation

The ICAO 24-bit address A4FC94 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 2 distinct

Callsign Airline Flights Last seen
CYO420 - 132 2026-07-17
CYO415 - 8 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CYO420 - Jul 17, 14:24 UTCJul 17, 17:15 UTC2h 50m
2026-07-16 CYO420 - Jul 16, 23:20 UTCJul 17, 00:45 UTC1h 25m
2026-07-16 CYO420 - Jul 16, 17:35 UTCJul 16, 18:05 UTC30m
2026-07-15 CYO420 - Jul 15, 23:30 UTCJul 16, 00:05 UTC35m
2026-07-15 CYO420 - Jul 15, 17:00 UTCJul 15, 18:40 UTC1h 40m
2026-07-15 CYO420 - Jul 15, 13:05 UTCJul 15, 15:40 UTC2h 35m
2026-07-14 CYO420 TPA → SRQ Jul 14, 18:10 UTCJul 14, 18:30 UTC20m
2026-07-14 CYO420 - Jul 14, 14:45 UTCJul 14, 16:45 UTC2h 0m
2026-07-14 CYO420 - Jul 14, 12:05 UTCJul 14, 12:50 UTC45m
2026-07-13 CYO420 - Jul 13, 21:55 UTCJul 13, 22:35 UTC40m
2026-07-13 CYO420 - Jul 13, 16:30 UTCJul 13, 19:00 UTC2h 30m
2026-07-13 CYO420 ABE → SRQ Jul 13, 13:10 UTCJul 13, 15:30 UTC2h 20m
2026-07-12 CYO420 - Jul 12, 20:40 UTCJul 12, 22:15 UTC1h 35m
2026-07-12 CYO420 - Jul 12, 17:20 UTCJul 12, 19:45 UTC2h 25m
2026-07-12 CYO420 - Jul 12, 14:15 UTCJul 12, 14:50 UTC35m
2026-07-10 CYO420 - Jul 10, 15:15 UTCJul 10, 16:50 UTC1h 35m
2026-07-09 CYO420 - Jul 9, 21:15 UTCJul 9, 22:35 UTC1h 20m
2026-07-09 CYO420 - Jul 9, 18:55 UTCJul 9, 20:15 UTC1h 20m
2026-07-09 CYO420 - Jul 9, 17:10 UTCJul 9, 17:25 UTC15m
2026-07-09 CYO420 - Jul 9, 14:25 UTCJul 9, 16:10 UTC1h 45m
2026-07-09 CYO420 - Jul 9, 11:45 UTCJul 9, 12:35 UTC50m
2026-07-08 CYO420 - Jul 8, 15:20 UTCJul 8, 18:30 UTC3h 10m
2026-07-07 CYO420 - Jul 7, 19:05 UTCJul 8, 13:30 UTC18h 25m
2026-07-07 CYO420 - Jul 7, 17:05 UTCJul 8, 13:30 UTC20h 25m
2026-07-07 CYO420 - Jul 7, 13:50 UTCJul 7, 15:40 UTC1h 50m
2026-07-06 CYO420 - Jul 6, 19:45 UTCJul 6, 21:15 UTC1h 30m
2026-07-06 CYO420 - Jul 6, 16:00 UTCJul 6, 16:30 UTC30m
2026-07-06 CYO420 - Jul 6, 13:55 UTCJul 6, 15:00 UTC1h 5m
2026-07-06 CYO420 PWK → AMW Jul 6, 00:00 UTCJul 6, 00:50 UTC50m
2026-07-05 CYO420 - Jul 5, 21:00 UTCJul 5, 22:30 UTC1h 30m
2026-07-05 CYO420 - Jul 5, 19:30 UTCJul 5, 20:00 UTC30m
2026-07-05 CYO420 - Jul 5, 16:55 UTCJul 5, 18:45 UTC1h 50m
2026-07-04 CYO420 - Jul 4, 23:30 UTCJul 5, 00:30 UTC1h 0m
2026-07-04 CYO420 - Jul 4, 20:40 UTCJul 4, 21:50 UTC1h 10m
2026-07-04 CYO420 - Jul 4, 18:20 UTCJul 4, 18:35 UTC15m
2026-07-02 CYO420 - Jul 2, 19:05 UTCJul 3, 16:00 UTC20h 55m
2026-07-02 CYO420 - Jul 2, 18:55 UTCJul 3, 16:00 UTC21h 5m
2026-07-02 CYO420 - Jul 2, 17:05 UTCJul 2, 17:40 UTC35m
2026-07-02 CYO420 - Jul 2, 14:40 UTCJul 2, 15:00 UTC20m
2026-07-02 CYO420 - Jul 2, 00:50 UTCJul 2, 01:40 UTC50m
2026-07-01 CYO420 - Jul 1, 20:30 UTCJul 1, 21:15 UTC45m
2026-07-01 CYO420 - Jul 1, 18:20 UTCJul 1, 19:05 UTC45m
2026-06-30 CYO420 - Jun 30, 18:30 UTCJun 30, 21:30 UTC3h 0m
2026-06-29 CYO420 - Jun 29, 19:15 UTCJun 29, 19:49 UTC35m
2026-06-29 CYO420 - Jun 29, 13:44 UTCJun 29, 16:59 UTC3h 15m
2026-06-28 CYO420 - Jun 28, 22:34 UTCJun 28, 23:29 UTC55m
2026-06-28 CYO420 - Jun 28, 20:04 UTCJun 28, 21:59 UTC1h 55m
2026-06-28 CYO420 - Jun 28, 18:00 UTCJun 28, 18:34 UTC35m
2026-06-28 CYO420 - Jun 28, 14:54 UTCJun 28, 15:40 UTC45m
2026-06-27 CYO420 - Jun 27, 21:10 UTCJun 27, 21:40 UTC30m

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 N420KV page for operator, model, and routing details .

Mode-S A4FC94 frequently asked

What is Mode-S code A4FC94?
A4FC94 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N420KV.
Where is Mode-S A4FC94 registered?
Mode-S code A4FC94 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 A4FC94 broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4FC94, octal 51176224, decimal 10,812,564.
What flights does A4FC94 operate?
Mode-S A4FC94 has broadcast 2 distinct callsigns, including CYO420, CYO415.