Apparatus

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sensors Mode-S transponder

A017FC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N105HF · CESSNA 172 Skyhawk · operated by HERITAGE ASSET LEASING LLC

Hex
A017FC
Octal
50013774
Decimal
10,491,900
Country
US
Tail
N105HF
Type
C172
No current signal · last broadcast 20d ago
Flights observed
148
Distinct callsigns
1
Country
US
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S A017FC.

Country allocation

The ICAO 24-bit address A017FC 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
N105HF - 148 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 N105HF ISP → ISP Jun 24, 19:29 UTCJun 24, 19:59 UTC30m
2026-06-24 N105HF - Jun 24, 15:39 UTCJun 24, 16:29 UTC50m
2026-06-21 N105HF - Jun 21, 21:44 UTCJun 21, 22:49 UTC1h 5m
2026-06-21 N105HF - Jun 21, 19:14 UTCJun 21, 20:00 UTC45m
2026-06-21 N105HF ISP → ISP Jun 21, 15:19 UTCJun 21, 16:14 UTC55m
2026-06-19 N105HF - Jun 19, 14:39 UTCJun 19, 15:39 UTC1h 0m
2026-06-17 N105HF - Jun 17, 22:20 UTCJun 17, 23:25 UTC1h 5m
2026-06-17 N105HF - Jun 17, 18:10 UTCJun 17, 19:25 UTC1h 15m
2026-06-17 N105HF - Jun 17, 16:00 UTCJun 17, 16:45 UTC45m
2026-06-17 N105HF - Jun 17, 13:35 UTCJun 17, 14:30 UTC55m
2026-06-16 N105HF - Jun 16, 17:19 UTCJun 16, 17:49 UTC30m
2026-06-16 N105HF - Jun 16, 13:50 UTCJun 16, 14:39 UTC50m
2026-06-16 N105HF - Jun 16, 11:40 UTCJun 16, 12:45 UTC1h 5m
2026-06-15 N105HF ISP → ISP Jun 15, 22:10 UTCJun 15, 22:49 UTC40m
2026-06-15 N105HF - Jun 15, 20:04 UTCJun 15, 20:40 UTC35m
2026-06-14 N105HF - Jun 14, 18:50 UTCJun 14, 19:35 UTC45m
2026-06-14 N105HF - Jun 14, 15:40 UTCJun 14, 16:45 UTC1h 5m
2026-06-14 N105HF - Jun 14, 13:50 UTCJun 14, 14:45 UTC55m
2026-06-13 N105HF MVY → ISP Jun 13, 21:50 UTCJun 13, 23:25 UTC1h 35m
2026-06-13 N105HF - Jun 13, 18:45 UTCJun 13, 20:35 UTC1h 50m
2026-06-13 N105HF - Jun 13, 15:15 UTCJun 13, 16:25 UTC1h 10m
2026-06-13 N105HF - Jun 13, 13:30 UTCJun 13, 14:20 UTC50m
2026-06-12 N105HF - Jun 12, 18:20 UTCJun 12, 18:50 UTC30m
2026-06-12 N105HF - Jun 12, 15:45 UTCJun 12, 16:45 UTC1h 0m
2026-06-12 N105HF - Jun 12, 13:55 UTCJun 12, 14:55 UTC1h 0m
2026-06-11 N105HF - Jun 11, 19:00 UTCJun 11, 20:25 UTC1h 25m
2026-06-11 N105HF - Jun 11, 16:25 UTCJun 11, 17:35 UTC1h 10m
2026-06-11 N105HF - Jun 11, 13:40 UTCJun 11, 14:10 UTC30m
2026-06-10 N105HF - Jun 10, 20:15 UTCJun 10, 21:45 UTC1h 30m
2026-06-10 N105HF - Jun 10, 18:20 UTCJun 10, 19:25 UTC1h 5m
2026-06-10 N105HF - Jun 10, 15:50 UTCJun 10, 16:40 UTC50m
2026-06-10 N105HF - Jun 10, 12:55 UTCJun 10, 14:30 UTC1h 35m
2026-06-09 N105HF - Jun 9, 21:30 UTCJun 10, 00:50 UTC3h 20m
2026-06-09 N105HF ISP → ISP Jun 9, 19:40 UTCJun 9, 19:50 UTC10m
2026-06-09 N105HF - Jun 9, 12:35 UTCJun 9, 13:50 UTC1h 15m
2026-06-09 N105HF - Jun 9, 02:20 UTCJun 9, 03:35 UTC1h 15m
2026-06-08 N105HF - Jun 8, 21:50 UTCJun 8, 22:40 UTC50m
2026-06-08 N105HF - Jun 8, 18:40 UTCJun 8, 19:15 UTC35m
2026-06-08 N105HF ISP → ISP Jun 8, 15:15 UTCJun 8, 15:55 UTC40m
2026-06-07 N105HF - Jun 7, 16:05 UTCJun 7, 16:50 UTC45m
2026-06-06 N105HF - Jun 6, 22:55 UTCJun 7, 00:10 UTC1h 15m
2026-06-06 N105HF - Jun 6, 17:24 UTCJun 6, 19:44 UTC2h 20m
2026-06-06 N105HF - Jun 6, 13:34 UTCJun 6, 14:45 UTC1h 10m
2026-06-05 N105HF - Jun 5, 21:55 UTCJun 5, 22:30 UTC35m
2026-06-05 N105HF ISP → ISP Jun 5, 17:00 UTCJun 5, 17:45 UTC45m
2026-06-05 N105HF - Jun 5, 14:55 UTCJun 5, 15:40 UTC45m
2026-06-04 N105HF ISP → ISP Jun 4, 21:45 UTCJun 4, 22:15 UTC30m
2026-06-04 N105HF ISP → ISP Jun 4, 17:50 UTCJun 4, 18:45 UTC55m
2026-06-04 N105HF - Jun 4, 15:45 UTCJun 4, 16:50 UTC1h 5m
2026-06-04 N105HF - Jun 4, 12:45 UTCJun 4, 13:35 UTC50m

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 N105HF page for operator, model, and routing details .

Mode-S A017FC frequently asked

What is Mode-S code A017FC?
A017FC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N105HF.
Where is Mode-S A017FC registered?
Mode-S code A017FC 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 A017FC broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A017FC, octal 50013774, decimal 10,491,900.
What flights does A017FC operate?
Mode-S A017FC has broadcast 1 distinct callsign, including N105HF.