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sensors Mode-S transponder

ABBA6B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N855FC · BOMBARDIER BD-100 Challenger 300 · operated by FLOW COMPANIES LLC

Hex
ABBA6B
Octal
52735153
Decimal
11,254,379
Country
US
Tail
N855FC
Type
CL30
No current signal · last broadcast 19h ago
Flights observed
66
Distinct callsigns
1
Country
US
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S ABBA6B.

Country allocation

The ICAO 24-bit address ABBA6B 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
N855FC - 66 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N855FC - Jul 13, 21:35 UTCJul 13, 22:05 UTC30m
2026-07-13 N855FC - Jul 13, 15:50 UTCJul 13, 20:45 UTC4h 55m
2026-07-12 N855FC - Jul 12, 21:25 UTCJul 12, 23:30 UTC2h 5m
2026-07-12 N855FC - Jul 12, 19:30 UTCJul 12, 20:01 UTC30m
2026-07-12 N855FC - Jul 12, 16:45 UTCJul 12, 18:05 UTC1h 20m
2026-07-12 N855FC - Jul 12, 15:30 UTCJul 12, 16:05 UTC35m
2026-07-12 N855FC - Jul 12, 14:20 UTCJul 12, 14:50 UTC30m
2026-07-09 N855FC - Jul 9, 00:20 UTCJul 9, 00:45 UTC25m
2026-07-08 N855FC - Jul 8, 19:15 UTCJul 8, 19:35 UTC20m
2026-07-06 N855FC - Jul 6, 16:15 UTCJul 6, 17:00 UTC45m
2026-07-06 N855FC - Jul 6, 14:20 UTCJul 6, 15:40 UTC1h 20m
2026-07-06 N855FC - Jul 6, 12:45 UTCJul 6, 13:15 UTC30m
2026-07-02 N855FC - Jul 2, 20:05 UTCJul 2, 20:35 UTC30m
2026-07-02 N855FC - Jul 2, 18:15 UTCJul 2, 19:15 UTC1h 0m
2026-07-02 N855FC - Jul 2, 16:25 UTCJul 2, 17:35 UTC1h 10m
2026-07-01 N855FC - Jul 1, 20:00 UTCJul 1, 20:25 UTC25m
2026-07-01 N855FC - Jul 1, 17:50 UTCJul 1, 19:05 UTC1h 15m
2026-07-01 N855FC - Jul 1, 15:20 UTCJul 1, 16:15 UTC55m
2026-06-25 N855FC - Jun 25, 19:39 UTCJun 25, 20:30 UTC50m
2026-06-25 N855FC - Jun 25, 18:04 UTCJun 25, 19:09 UTC1h 5m
2026-06-24 N855FC - Jun 24, 21:40 UTCJun 24, 22:14 UTC35m
2026-06-24 N855FC - Jun 24, 19:59 UTCJun 24, 20:40 UTC40m
2026-06-23 N855FC - Jun 23, 20:29 UTCJun 23, 21:05 UTC35m
2026-06-23 N855FC - Jun 23, 17:15 UTCJun 23, 17:44 UTC30m
2026-06-23 N855FC - Jun 23, 16:09 UTCJun 23, 16:50 UTC40m
2026-06-23 N855FC - Jun 23, 13:09 UTCJun 23, 13:34 UTC25m
2026-06-23 N855FC - Jun 23, 12:09 UTCJun 23, 12:35 UTC25m
2026-06-22 N855FC - Jun 22, 19:40 UTCJun 22, 20:24 UTC45m
2026-06-22 N855FC - Jun 22, 18:00 UTCJun 22, 19:00 UTC1h 0m
2026-06-19 N855FC - Jun 19, 19:09 UTCJun 19, 23:04 UTC3h 55m
2026-06-19 N855FC - Jun 19, 16:49 UTCJun 19, 17:24 UTC35m
2026-06-13 N855FC PDX → BFI Jun 13, 21:00 UTCJun 13, 21:30 UTC30m
2026-06-13 N855FC - Jun 13, 14:50 UTCJun 13, 20:10 UTC5h 20m
2026-06-07 N855FC - Jun 7, 15:00 UTCJun 7, 16:10 UTC1h 10m
2026-06-07 N855FC - Jun 7, 12:50 UTCJun 7, 14:15 UTC1h 25m
2026-06-06 N855FC - Jun 6, 18:14 UTCJun 6, 18:45 UTC30m
2026-06-06 N855FC - Jun 6, 16:55 UTCJun 6, 17:19 UTC25m
2026-06-05 N855FC - Jun 5, 22:05 UTCJun 5, 23:20 UTC1h 15m
2026-06-05 N855FC - Jun 5, 20:05 UTCJun 5, 21:25 UTC1h 20m
2026-06-04 N855FC - Jun 4, 15:45 UTCJun 4, 16:05 UTC20m
2026-06-04 N855FC - Jun 4, 14:50 UTCJun 4, 15:15 UTC25m
2026-06-03 N855FC - Jun 3, 20:20 UTCJun 3, 20:45 UTC25m
2026-06-03 N855FC - Jun 3, 19:05 UTCJun 3, 19:25 UTC20m
2026-06-03 N855FC - Jun 3, 15:15 UTCJun 3, 15:45 UTC30m
2026-06-03 N855FC - Jun 3, 12:05 UTCJun 3, 13:15 UTC1h 10m
2026-06-01 N855FC - Jun 1, 19:20 UTCJun 1, 19:50 UTC30m
2026-06-01 N855FC - Jun 1, 17:15 UTCJun 1, 17:40 UTC25m
2026-05-28 N855FC - May 28, 18:25 UTCMay 28, 18:50 UTC25m
2026-05-28 N855FC - May 28, 17:00 UTCMay 28, 17:25 UTC25m
2026-05-28 N855FC - May 28, 15:25 UTCMay 28, 16:15 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 N855FC page for operator, model, and routing details .

Mode-S ABBA6B frequently asked

What is Mode-S code ABBA6B?
ABBA6B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N855FC.
Where is Mode-S ABBA6B registered?
Mode-S code ABBA6B 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 ABBA6B broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBA6B, octal 52735153, decimal 11,254,379.
What flights does ABBA6B operate?
Mode-S ABBA6B has broadcast 1 distinct callsign, including N855FC.