Apparatus

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sensors Mode-S transponder

AB3FC1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N824AK · ROBINSON R-44 Raven · operated by OLD CITY HELICOPTER SALES LLC

Hex
AB3FC1
Octal
52637701
Decimal
11,222,977
Country
US
Tail
N824AK
Type
R44
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
199
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AB3FC1.

Country allocation

The ICAO 24-bit address AB3FC1 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
N824AK - 199 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N824AK - Jul 26, 22:05 UTCJul 26, 22:15 UTC10m
2026-07-26 N824AK - Jul 26, 19:05 UTCJul 26, 20:00 UTC55m
2026-07-26 N824AK - Jul 26, 16:45 UTCJul 26, 17:00 UTC15m
2026-07-25 N824AK - Jul 25, 22:45 UTCJul 25, 23:30 UTC45m
2026-07-25 N824AK - Jul 25, 21:05 UTCJul 25, 21:25 UTC20m
2026-07-25 N824AK - Jul 25, 19:05 UTCJul 25, 20:05 UTC1h 0m
2026-07-25 N824AK - Jul 25, 17:50 UTCJul 25, 18:35 UTC45m
2026-07-25 N824AK - Jul 25, 17:00 UTCJul 25, 17:10 UTC10m
2026-07-24 N824AK - Jul 24, 23:50 UTCJul 25, 00:00 UTC10m
2026-07-24 N824AK - Jul 24, 20:00 UTCJul 24, 21:25 UTC1h 25m
2026-07-24 N824AK - Jul 24, 18:20 UTCJul 24, 18:40 UTC20m
2026-07-24 N824AK - Jul 24, 17:00 UTCJul 24, 17:10 UTC10m
2026-07-24 N824AK - Jul 24, 00:10 UTCJul 24, 00:25 UTC15m
2026-07-23 N824AK - Jul 23, 22:10 UTCJul 23, 22:35 UTC25m
2026-07-23 N824AK - Jul 23, 20:20 UTCJul 23, 21:30 UTC1h 10m
2026-07-23 N824AK - Jul 23, 18:00 UTCJul 23, 18:25 UTC25m
2026-07-23 N824AK - Jul 23, 17:10 UTCJul 23, 17:20 UTC10m
2026-07-22 N824AK NOT → NOT Jul 22, 02:25 UTCJul 22, 02:55 UTC30m
2026-07-22 N824AK NOT → NOT Jul 22, 01:00 UTCJul 22, 01:50 UTC50m
2026-07-19 N824AK - Jul 19, 23:40 UTCJul 19, 23:50 UTC10m
2026-07-19 N824AK - Jul 19, 19:55 UTCJul 19, 20:20 UTC25m
2026-07-19 N824AK - Jul 19, 18:10 UTCJul 19, 18:40 UTC30m
2026-07-19 N824AK - Jul 19, 17:00 UTCJul 19, 17:15 UTC15m
2026-07-18 N824AK - Jul 18, 23:50 UTCJul 19, 00:00 UTC10m
2026-07-18 N824AK - Jul 18, 21:55 UTCJul 18, 22:20 UTC25m
2026-07-18 N824AK - Jul 18, 18:35 UTCJul 18, 19:35 UTC1h 0m
2026-07-18 N824AK - Jul 18, 17:00 UTCJul 18, 17:15 UTC15m
2026-07-17 N824AK - Jul 17, 23:55 UTCJul 18, 00:10 UTC15m
2026-07-17 N824AK - Jul 17, 21:10 UTCJul 17, 22:55 UTC1h 45m
2026-07-17 N824AK - Jul 17, 20:10 UTCJul 17, 20:35 UTC25m
2026-07-17 N824AK - Jul 17, 16:59 UTCJul 17, 17:15 UTC15m
2026-07-16 N824AK - Jul 16, 23:35 UTCJul 16, 23:49 UTC15m
2026-07-16 N824AK - Jul 16, 20:49 UTCJul 16, 22:45 UTC1h 55m
2026-07-16 N824AK - Jul 16, 19:35 UTCJul 16, 20:00 UTC25m
2026-07-16 N824AK - Jul 16, 18:29 UTCJul 16, 18:59 UTC30m
2026-07-16 N824AK - Jul 16, 17:05 UTCJul 16, 17:20 UTC15m
2026-07-15 N824AK NOT → NOT Jul 15, 02:20 UTCJul 15, 02:45 UTC25m
2026-07-15 N824AK NOT → NOT Jul 15, 01:40 UTCJul 15, 02:10 UTC30m
2026-07-13 N824AK - Jul 13, 23:10 UTCJul 13, 23:25 UTC15m
2026-07-13 N824AK - Jul 13, 20:40 UTCJul 13, 22:30 UTC1h 50m
2026-07-13 N824AK - Jul 13, 18:10 UTCJul 13, 18:55 UTC45m
2026-07-13 N824AK - Jul 13, 16:45 UTCJul 13, 17:00 UTC15m
2026-07-12 N824AK - Jul 12, 21:55 UTCJul 12, 22:45 UTC50m
2026-07-12 N824AK - Jul 12, 20:30 UTCJul 12, 21:00 UTC30m
2026-07-12 N824AK - Jul 12, 19:25 UTCJul 12, 19:45 UTC20m
2026-07-12 N824AK - Jul 12, 16:55 UTCJul 12, 17:50 UTC55m
2026-07-11 N824AK - Jul 11, 23:10 UTCJul 12, 00:15 UTC1h 5m
2026-07-11 N824AK - Jul 11, 21:35 UTCJul 11, 22:05 UTC30m
2026-07-11 N824AK - Jul 11, 16:55 UTCJul 11, 19:20 UTC2h 25m
2026-07-09 N824AK - Jul 9, 23:30 UTCJul 9, 23:45 UTC15m

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 N824AK page for operator, model, and routing details .

Mode-S AB3FC1 frequently asked

What is Mode-S code AB3FC1?
AB3FC1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N824AK.
Where is Mode-S AB3FC1 registered?
Mode-S code AB3FC1 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 AB3FC1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3FC1, octal 52637701, decimal 11,222,977.
What flights does AB3FC1 operate?
Mode-S AB3FC1 has broadcast 1 distinct callsign, including N824AK.