Apparatus

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sensors Mode-S transponder

ABF4B2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N87HF · CESSNA 172 Skyhawk · operated by HERITAGE ASSET LEASING LLC

Hex
ABF4B2
Octal
52772262
Decimal
11,269,298
Country
US
Tail
N87HF
Type
C172
No current signal · last broadcast Jul 26, 20:05 UTC
Flights observed
200
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 20:05 UTC

Last known position

Most recent position reported by Mode-S ABF4B2.

Country allocation

The ICAO 24-bit address ABF4B2 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
N87HF - 200 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N87HF ISP → ISP Jul 26, 19:40 UTCJul 26, 20:05 UTC25m
2026-07-26 N87HF - Jul 26, 17:35 UTCJul 26, 18:25 UTC50m
2026-07-26 N87HF - Jul 26, 15:35 UTCJul 26, 16:25 UTC50m
2026-07-26 N87HF - Jul 26, 13:40 UTCJul 26, 14:20 UTC40m
2026-07-26 N87HF - Jul 26, 11:55 UTCJul 26, 12:45 UTC50m
2026-07-25 N87HF - Jul 25, 16:50 UTCJul 25, 17:40 UTC50m
2026-07-25 N87HF - Jul 25, 14:40 UTCJul 25, 15:30 UTC50m
2026-07-25 N87HF - Jul 25, 12:20 UTCJul 25, 13:15 UTC55m
2026-07-24 N87HF - Jul 24, 21:40 UTCJul 25, 00:10 UTC2h 30m
2026-07-24 N87HF - Jul 24, 17:50 UTCJul 24, 20:25 UTC2h 35m
2026-07-24 N87HF - Jul 24, 15:55 UTCJul 24, 16:45 UTC50m
2026-07-24 N87HF - Jul 24, 14:25 UTCJul 24, 14:45 UTC20m
2026-07-24 N87HF - Jul 24, 11:55 UTCJul 24, 12:35 UTC40m
2026-07-08 N87HF - Jul 8, 23:20 UTCJul 8, 23:50 UTC30m
2026-07-08 N87HF - Jul 8, 22:00 UTCJul 8, 22:50 UTC50m
2026-07-08 N87HF - Jul 8, 19:30 UTCJul 8, 20:10 UTC40m
2026-07-08 N87HF ISP → ISP Jul 8, 17:40 UTCJul 8, 18:35 UTC55m
2026-07-08 N87HF - Jul 8, 16:15 UTCJul 8, 16:55 UTC40m
2026-07-08 N87HF - Jul 8, 14:40 UTCJul 8, 15:30 UTC50m
2026-07-06 N87HF - Jul 6, 00:05 UTCJul 6, 00:35 UTC30m
2026-07-04 N87HF - Jul 4, 18:20 UTCJul 4, 19:55 UTC1h 35m
2026-07-04 N87HF - Jul 4, 16:25 UTCJul 4, 16:55 UTC30m
2026-07-04 N87HF - Jul 4, 12:20 UTCJul 4, 12:50 UTC30m
2026-07-03 N87HF - Jul 3, 18:35 UTCJul 3, 19:15 UTC40m
2026-07-03 N87HF ISP → ISP Jul 3, 16:15 UTCJul 3, 16:35 UTC20m
2026-07-03 N87HF - Jul 3, 01:10 UTCJul 3, 02:05 UTC55m
2026-07-02 N87HF - Jul 2, 20:25 UTCJul 2, 21:25 UTC1h 0m
2026-07-02 N87HF - Jul 2, 17:40 UTCJul 2, 18:35 UTC55m
2026-07-02 N87HF - Jul 2, 15:55 UTCJul 2, 16:30 UTC35m
2026-07-02 N87HF - Jul 2, 13:50 UTCJul 2, 14:35 UTC45m
2026-07-02 N87HF - Jul 2, 11:45 UTCJul 2, 12:35 UTC50m
2026-07-01 N87HF - Jul 1, 21:50 UTCJul 1, 22:50 UTC1h 0m
2026-07-01 N87HF - Jul 1, 20:05 UTCJul 1, 20:50 UTC45m
2026-07-01 N87HF - Jul 1, 17:55 UTCJul 1, 18:45 UTC50m
2026-07-01 N87HF - Jul 1, 15:50 UTCJul 1, 16:55 UTC1h 5m
2026-07-01 N87HF - Jul 1, 13:50 UTCJul 1, 14:35 UTC45m
2026-07-01 N87HF - Jul 1, 12:00 UTCJul 1, 12:50 UTC50m
2026-07-01 N87HF - Jul 1, 01:50 UTCJul 1, 03:25 UTC1h 35m
2026-06-30 N87HF - Jun 30, 21:05 UTCJun 30, 21:50 UTC45m
2026-06-30 N87HF - Jun 30, 19:20 UTCJun 30, 19:45 UTC25m
2026-06-30 N87HF - Jun 30, 17:35 UTCJun 30, 18:10 UTC35m
2026-06-30 N87HF - Jun 30, 14:40 UTCJun 30, 15:40 UTC1h 0m
2026-06-30 N87HF - Jun 30, 13:15 UTCJun 30, 13:35 UTC20m
2026-06-30 N87HF - Jun 30, 11:50 UTCJun 30, 12:20 UTC30m
2026-06-29 N87HF - Jun 29, 23:05 UTCJun 30, 00:00 UTC55m
2026-06-29 N87HF - Jun 29, 21:09 UTCJun 29, 21:50 UTC40m
2026-06-29 N87HF ISP → ISP Jun 29, 19:00 UTCJun 29, 19:24 UTC25m
2026-06-29 N87HF - Jun 29, 16:59 UTCJun 29, 17:30 UTC30m
2026-06-29 N87HF - Jun 29, 15:00 UTCJun 29, 15:45 UTC45m
2026-06-28 N87HF ISP → ISP Jun 28, 20:34 UTCJun 28, 21:45 UTC1h 10m

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 N87HF page for operator, model, and routing details .

Mode-S ABF4B2 frequently asked

What is Mode-S code ABF4B2?
ABF4B2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N87HF.
Where is Mode-S ABF4B2 registered?
Mode-S code ABF4B2 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 ABF4B2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABF4B2, octal 52772262, decimal 11,269,298.
What flights does ABF4B2 operate?
Mode-S ABF4B2 has broadcast 1 distinct callsign, including N87HF.