Apparatus

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sensors Mode-S transponder

AB4EA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N828AP · AEROSPATIALE AS-350 Ecureuil · operated by HELINET AVIATION SERVICES LLC

Hex
AB4EA1
Octal
52647241
Decimal
11,226,785
Country
US
Tail
N828AP
Type
AS50
No current signal · last broadcast Jul 22, 21:25 UTC
Flights observed
177
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 21:25 UTC

Last known position

Most recent position reported by Mode-S AB4EA1.

Country allocation

The ICAO 24-bit address AB4EA1 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
N828AP - 177 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N828AP VNY → VNY Jul 22, 20:45 UTCJul 22, 21:25 UTC40m
2026-07-22 N828AP - Jul 22, 18:25 UTCJul 22, 19:30 UTC1h 5m
2026-07-21 N828AP - Jul 21, 21:00 UTCJul 21, 22:10 UTC1h 10m
2026-07-21 N828AP VNY → VNY Jul 21, 18:15 UTCJul 21, 19:00 UTC45m
2026-07-20 N828AP - Jul 20, 23:05 UTCJul 20, 23:15 UTC10m
2026-07-20 N828AP VNY → VNY Jul 20, 20:55 UTCJul 20, 21:45 UTC50m
2026-07-17 N828AP VNY → VNY Jul 17, 22:35 UTCJul 17, 23:05 UTC30m
2026-07-17 N828AP VNY → VNY Jul 17, 21:15 UTCJul 17, 21:50 UTC35m
2026-07-16 N828AP VNY → VNY Jul 16, 17:30 UTCJul 16, 19:05 UTC1h 35m
2026-07-16 N828AP VNY → VNY Jul 16, 14:29 UTCJul 16, 16:09 UTC1h 40m
2026-07-15 N828AP VNY → VNY Jul 15, 22:30 UTCJul 15, 23:30 UTC1h 0m
2026-07-15 N828AP - Jul 15, 21:05 UTCJul 15, 21:55 UTC50m
2026-07-09 N828AP - Jul 9, 21:10 UTCJul 9, 21:45 UTC35m
2026-07-09 N828AP VNY → VNY Jul 9, 15:50 UTCJul 9, 17:35 UTC1h 45m
2026-07-08 N828AP - Jul 8, 20:35 UTCJul 8, 21:40 UTC1h 5m
2026-07-07 N828AP - Jul 7, 22:40 UTCJul 8, 00:25 UTC1h 45m
2026-07-07 N828AP - Jul 7, 20:45 UTCJul 7, 22:10 UTC1h 25m
2026-07-06 N828AP VNY → VNY Jul 6, 17:15 UTCJul 6, 18:35 UTC1h 20m
2026-07-04 N828AP - Jul 4, 03:20 UTCJul 4, 05:00 UTC1h 40m
2026-06-30 N828AP VNY → VNY Jun 30, 19:30 UTCJun 30, 20:55 UTC1h 25m
2026-06-29 N828AP - Jun 29, 19:00 UTCJun 29, 21:39 UTC2h 40m
2026-06-25 N828AP - Jun 25, 18:04 UTCJun 25, 18:59 UTC55m
2026-06-25 N828AP VNY → VNY Jun 25, 04:04 UTCJun 25, 06:20 UTC2h 15m
2026-06-24 N828AP - Jun 24, 23:14 UTCJun 24, 23:45 UTC30m
2026-06-24 N828AP - Jun 24, 17:45 UTCJun 24, 19:04 UTC1h 20m
2026-06-23 N828AP - Jun 23, 18:20 UTCJun 23, 19:39 UTC1h 20m
2026-06-23 N828AP VNY → VNY Jun 23, 16:59 UTCJun 23, 17:34 UTC35m
2026-06-22 N828AP VNY → VNY Jun 22, 22:54 UTCJun 22, 23:45 UTC50m
2026-06-19 N828AP - Jun 19, 02:35 UTCJun 19, 02:45 UTC10m
2026-06-18 N828AP - Jun 18, 23:40 UTCJun 19, 01:54 UTC2h 14m
2026-06-18 N828AP VNY → WHP Jun 18, 17:55 UTCJun 18, 18:00 UTC5m
2026-06-16 N828AP - Jun 16, 20:10 UTCJun 16, 20:25 UTC15m
2026-06-15 N828AP VNY → VNY Jun 15, 23:54 UTCJun 16, 01:55 UTC2h 0m
2026-06-15 N828AP VNY → VNY Jun 15, 17:40 UTCJun 15, 18:50 UTC1h 10m
2026-06-15 N828AP - Jun 15, 12:25 UTCJun 15, 14:10 UTC1h 45m
2026-06-14 N828AP - Jun 14, 23:59 UTCJun 15, 00:55 UTC55m
2026-06-12 N828AP - Jun 12, 23:10 UTCJun 13, 00:00 UTC50m
2026-06-12 N828AP - Jun 12, 17:35 UTCJun 12, 19:20 UTC1h 45m
2026-06-12 N828AP VNY → VNY Jun 12, 15:25 UTCJun 12, 16:20 UTC55m
2026-06-12 N828AP VNY → VNY Jun 12, 10:40 UTCJun 12, 14:01 UTC3h 20m
2026-06-11 N828AP - Jun 11, 20:15 UTCJun 11, 21:20 UTC1h 5m
2026-06-10 N828AP - Jun 10, 20:15 UTCJun 10, 21:00 UTC45m
2026-06-09 N828AP - Jun 9, 21:05 UTCJun 9, 22:20 UTC1h 15m
2026-06-08 N828AP VNY → VNY Jun 8, 19:40 UTCJun 8, 20:15 UTC35m
2026-06-05 N828AP VNY → VNY Jun 5, 20:10 UTCJun 5, 20:30 UTC20m
2026-06-03 N828AP - Jun 3, 02:30 UTCJun 3, 03:20 UTC50m
2026-06-03 N828AP VNY → BFL Jun 3, 00:00 UTCJun 3, 01:50 UTC1h 50m
2026-06-02 N828AP - Jun 2, 21:25 UTCJun 2, 22:05 UTC40m
2026-06-02 N828AP VNY → VNY Jun 2, 18:50 UTCJun 2, 19:25 UTC35m
2026-06-02 N828AP - Jun 2, 04:35 UTCJun 2, 05:15 UTC40m

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 N828AP page for operator, model, and routing details .

Mode-S AB4EA1 frequently asked

What is Mode-S code AB4EA1?
AB4EA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N828AP.
Where is Mode-S AB4EA1 registered?
Mode-S code AB4EA1 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 AB4EA1 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4EA1, octal 52647241, decimal 11,226,785.
What flights does AB4EA1 operate?
Mode-S AB4EA1 has broadcast 1 distinct callsign, including N828AP.