Apparatus

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sensors Mode-S transponder

A3F429

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N354FC · CIRRUS SR-22 · operated by BLUE SKY NOVEMBER LLC

Hex
A3F429
Octal
50772051
Decimal
10,744,873
Country
US
Tail
N354FC
Type
SR22
No current signal · last broadcast 1d ago
Flights observed
113
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A3F429.

Country allocation

The ICAO 24-bit address A3F429 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
HPK54 Hopscotch Air 113 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 HPK54 LWM → MHT Jul 19, 10:45 UTCJul 19, 12:50 UTC2h 5m
2026-07-19 HPK54 LWM → MHT Jul 19, 09:30 UTCJul 19, 09:55 UTC25m
2026-07-16 HPK54 LWM → MHT Jul 16, 22:05 UTCJul 17, 01:29 UTC3h 25m
2026-07-16 HPK54 LWM → MHT Jul 16, 20:15 UTCJul 16, 20:29 UTC15m
2026-07-16 HPK54 FID → FRG Jul 16, 13:00 UTCJul 16, 13:30 UTC30m
2026-07-16 HPK54 - Jul 16, 12:00 UTCJul 16, 12:25 UTC25m
2026-07-15 HPK54 - Jul 15, 16:35 UTCJul 15, 17:00 UTC25m
2026-07-15 HPK54 - Jul 15, 15:10 UTCJul 15, 15:55 UTC45m
2026-07-15 HPK54 - Jul 15, 12:10 UTCJul 15, 13:05 UTC55m
2026-07-15 HPK54 - Jul 15, 10:55 UTCJul 15, 11:20 UTC25m
2026-07-14 HPK54 - Jul 14, 15:05 UTCJul 14, 16:35 UTC1h 30m
2026-07-14 HPK54 FRG → FRG Jul 14, 13:00 UTCJul 14, 14:15 UTC1h 15m
2026-07-13 HPK54 HPN → FRG Jul 13, 01:20 UTCJul 13, 01:35 UTC15m
2026-07-12 HPK54 - Jul 12, 23:50 UTCJul 13, 01:01 UTC1h 10m
2026-07-12 HPK54 - Jul 12, 21:15 UTCJul 12, 22:25 UTC1h 10m
2026-07-10 HPK54 - Jul 10, 22:40 UTCJul 10, 22:50 UTC10m
2026-07-09 HPK54 - Jul 9, 19:20 UTCJul 9, 19:35 UTC15m
2026-07-09 HPK54 - Jul 9, 15:30 UTCJul 9, 17:45 UTC2h 15m
2026-07-09 HPK54 - Jul 9, 12:10 UTCJul 9, 12:20 UTC10m
2026-07-08 HPK54 - Jul 8, 20:45 UTCJul 8, 21:45 UTC1h 0m
2026-07-08 HPK54 - Jul 8, 16:30 UTCJul 8, 18:45 UTC2h 15m
2026-07-08 HPK54 - Jul 8, 13:50 UTCJul 8, 14:05 UTC15m
2026-07-06 HPK54 - Jul 6, 20:20 UTCJul 6, 22:25 UTC2h 5m
2026-07-06 HPK54 - Jul 6, 16:50 UTCJul 6, 18:55 UTC2h 5m
2026-07-06 HPK54 - Jul 6, 15:15 UTCJul 6, 15:50 UTC35m
2026-07-06 HPK54 - Jul 6, 14:15 UTCJul 6, 14:35 UTC20m
2026-07-04 HPK54 ACY → FRG Jul 4, 02:35 UTCJul 4, 03:20 UTC45m
2026-07-03 HPK54 - Jul 3, 21:55 UTCJul 3, 22:40 UTC45m
2026-07-02 HPK54 - Jul 2, 21:10 UTCJul 2, 21:30 UTC20m
2026-07-02 HPK54 - Jul 2, 16:45 UTCJul 2, 18:55 UTC2h 10m
2026-07-02 HPK54 - Jul 2, 14:05 UTCJul 2, 16:00 UTC1h 55m
2026-07-02 HPK54 - Jul 2, 13:15 UTCJul 2, 13:25 UTC10m
2026-07-01 HPK54 FRG → FRG Jul 1, 19:55 UTCJul 1, 21:25 UTC1h 30m
2026-07-01 HPK54 JFK → FRG Jul 1, 16:45 UTCJul 1, 18:10 UTC1h 25m
2026-07-01 HPK54 - Jul 1, 15:45 UTCJul 1, 16:00 UTC15m
2026-06-30 HPK54 FRG → FRG Jun 30, 15:15 UTCJun 30, 18:55 UTC3h 40m
2026-06-29 HPK54 - Jun 29, 17:49 UTCJun 29, 18:49 UTC1h 0m
2026-06-29 HPK54 - Jun 29, 15:49 UTCJun 29, 17:10 UTC1h 20m
2026-06-28 HPK54 - Jun 28, 03:05 UTCJun 28, 03:25 UTC20m
2026-06-28 HPK54 - Jun 28, 01:40 UTCJun 28, 02:34 UTC55m
2026-06-27 HPK54 - Jun 27, 23:34 UTCJun 28, 00:39 UTC1h 5m
2026-06-27 HPK54 - Jun 27, 17:04 UTCJun 27, 18:20 UTC1h 15m
2026-06-27 HPK54 - Jun 27, 14:14 UTCJun 27, 15:45 UTC1h 30m
2026-06-27 HPK54 - Jun 27, 03:40 UTCJun 27, 03:55 UTC15m
2026-06-27 HPK54 - Jun 27, 02:59 UTCJun 27, 03:25 UTC25m
2026-06-26 HPK54 - Jun 26, 21:10 UTCJun 26, 22:14 UTC1h 5m
2026-06-26 HPK54 - Jun 26, 01:24 UTCJun 26, 02:30 UTC1h 5m
2026-06-25 HPK54 - Jun 25, 21:40 UTCJun 25, 22:10 UTC30m
2026-06-25 HPK54 - Jun 25, 20:19 UTCJun 25, 20:39 UTC20m
2026-06-25 HPK54 - Jun 25, 18:39 UTCJun 25, 19:15 UTC35m

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 N354FC page for operator, model, and routing details .

Mode-S A3F429 frequently asked

What is Mode-S code A3F429?
A3F429 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N354FC.
Where is Mode-S A3F429 registered?
Mode-S code A3F429 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 A3F429 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 A3F429, octal 50772051, decimal 10,744,873.
What flights does A3F429 operate?
Mode-S A3F429 has broadcast 1 distinct callsign, including HPK54.