Apparatus

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sensors Mode-S transponder

ABBB1D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N855NF · AIR TRACTOR AT-802 · operated by TAYLOR AVIATION INC

Hex
ABBB1D
Octal
52735435
Decimal
11,254,557
Country
US
Tail
N855NF
Type
AT8T
No current signal · last broadcast 10d ago
Flights observed
105
Distinct callsigns
2
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S ABBB1D.

Country allocation

The ICAO 24-bit address ABBB1D 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 2 distinct

Callsign Airline Flights Last seen
TKR855 - 87 2026-07-26
N855NF - 18 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TKR855 - Jul 26, 17:55 UTCJul 26, 18:20 UTC25m
2026-07-26 TKR855 - Jul 26, 00:55 UTCJul 26, 01:10 UTC15m
2026-07-25 TKR855 - Jul 25, 23:30 UTCJul 26, 00:00 UTC30m
2026-07-25 TKR855 - Jul 25, 22:15 UTCJul 25, 22:45 UTC30m
2026-07-19 TKR855 - Jul 19, 03:05 UTCJul 19, 03:30 UTC25m
2026-07-19 TKR855 - Jul 19, 01:30 UTCJul 19, 02:00 UTC30m
2026-07-15 TKR855 - Jul 15, 21:20 UTCJul 15, 21:50 UTC30m
2026-07-15 TKR855 - Jul 15, 19:45 UTCJul 15, 21:05 UTC1h 20m
2026-07-14 TKR855 - Jul 14, 17:45 UTCJul 14, 18:45 UTC1h 0m
2026-07-14 TKR855 - Jul 14, 16:25 UTCJul 14, 17:40 UTC1h 15m
2026-07-14 TKR855 - Jul 14, 01:40 UTCJul 14, 02:00 UTC20m
2026-07-14 TKR855 - Jul 14, 00:55 UTCJul 14, 01:35 UTC40m
2026-07-13 TKR855 - Jul 13, 23:35 UTCJul 14, 00:05 UTC30m
2026-07-13 TKR855 - Jul 13, 22:50 UTCJul 13, 23:30 UTC40m
2026-07-13 TKR855 - Jul 13, 20:35 UTCJul 13, 21:00 UTC25m
2026-07-13 TKR855 - Jul 13, 19:15 UTCJul 13, 19:45 UTC30m
2026-07-13 TKR855 - Jul 13, 18:35 UTCJul 13, 19:10 UTC35m
2026-07-13 TKR855 - Jul 13, 17:50 UTCJul 13, 18:25 UTC35m
2026-07-13 TKR855 - Jul 13, 17:00 UTCJul 13, 17:45 UTC45m
2026-07-13 TKR855 - Jul 13, 00:05 UTCJul 13, 01:20 UTC1h 15m
2026-07-12 TKR855 - Jul 12, 21:55 UTCJul 12, 22:55 UTC1h 0m
2026-07-12 TKR855 - Jul 12, 20:40 UTCJul 12, 21:50 UTC1h 10m
2026-07-12 TKR855 - Jul 12, 19:10 UTCJul 12, 19:40 UTC30m
2026-07-12 TKR855 - Jul 12, 18:25 UTCJul 12, 19:05 UTC40m
2026-07-12 TKR855 - Jul 12, 17:40 UTCJul 12, 18:20 UTC40m
2026-07-11 TKR855 - Jul 11, 22:50 UTCJul 11, 23:15 UTC25m
2026-07-11 TKR855 - Jul 11, 22:05 UTCJul 11, 22:45 UTC40m
2026-07-11 TKR855 - Jul 11, 21:15 UTCJul 11, 22:01 UTC45m
2026-07-11 TKR855 - Jul 11, 20:30 UTCJul 11, 21:10 UTC40m
2026-07-11 TKR855 - Jul 11, 19:45 UTCJul 11, 20:25 UTC40m
2026-07-11 TKR855 - Jul 11, 18:20 UTCJul 11, 18:45 UTC25m
2026-07-11 TKR855 - Jul 11, 16:50 UTCJul 11, 18:15 UTC1h 25m
2026-07-11 TKR855 - Jul 11, 16:10 UTCJul 11, 16:40 UTC30m
2026-07-11 TKR855 - Jul 11, 15:25 UTCJul 11, 15:55 UTC30m
2026-07-11 TKR855 - Jul 11, 02:10 UTCJul 11, 02:35 UTC25m
2026-07-11 TKR855 - Jul 11, 01:30 UTCJul 11, 01:55 UTC25m
2026-07-11 TKR855 - Jul 11, 00:50 UTCJul 11, 01:25 UTC35m
2026-07-11 TKR855 - Jul 11, 00:00 UTCJul 11, 00:35 UTC35m
2026-07-10 TKR855 - Jul 10, 01:25 UTCJul 10, 01:50 UTC25m
2026-07-09 TKR855 - Jul 9, 18:45 UTCJul 9, 19:10 UTC25m
2026-07-04 TKR855 - Jul 4, 01:55 UTCJul 4, 02:10 UTC15m
2026-07-04 TKR855 - Jul 4, 01:00 UTCJul 4, 01:15 UTC15m
2026-07-02 TKR855 - Jul 2, 00:30 UTCJul 2, 00:45 UTC15m
2026-07-01 TKR855 - Jul 1, 23:35 UTCJul 1, 23:50 UTC15m
2026-06-30 TKR855 - Jun 30, 01:19 UTCJun 30, 01:35 UTC16m
2026-06-30 TKR855 - Jun 30, 00:14 UTCJun 30, 00:30 UTC15m
2026-06-28 TKR855 - Jun 28, 01:19 UTCJun 28, 01:59 UTC40m
2026-06-28 TKR855 - Jun 28, 00:09 UTCJun 28, 01:15 UTC1h 5m
2026-06-27 TKR855 - Jun 27, 20:49 UTCJun 27, 21:25 UTC35m
2026-06-27 TKR855 - Jun 27, 19:15 UTCJun 27, 19:49 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 N855NF page for operator, model, and routing details .

Mode-S ABBB1D frequently asked

What is Mode-S code ABBB1D?
ABBB1D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N855NF.
Where is Mode-S ABBB1D registered?
Mode-S code ABBB1D 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 ABBB1D broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBB1D, octal 52735435, decimal 11,254,557.
What flights does ABBB1D operate?
Mode-S ABBB1D has broadcast 2 distinct callsigns, including TKR855, N855NF.