Apparatus

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sensors Mode-S transponder

A1CFB0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2159H · operated by BEVERLY FLIGHT CENTER LLC

Hex
A1CFB0
Octal
50347660
Decimal
10,604,464
Country
US
Tail
N2159H
Type
P28A
No current signal · last broadcast 10h ago
Flights observed
152
Distinct callsigns
1
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A1CFB0.

Country allocation

The ICAO 24-bit address A1CFB0 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
N2159H - 152 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N2159H - Jul 13, 22:50 UTCJul 14, 00:05 UTC1h 15m
2026-07-13 N2159H - Jul 13, 18:55 UTCJul 13, 19:15 UTC20m
2026-07-13 N2159H - Jul 13, 15:45 UTCJul 13, 16:50 UTC1h 5m
2026-07-12 N2159H - Jul 12, 21:15 UTCJul 12, 22:05 UTC50m
2026-07-12 N2159H - Jul 12, 19:45 UTCJul 12, 20:30 UTC45m
2026-07-12 N2159H - Jul 12, 18:15 UTCJul 12, 18:45 UTC30m
2026-07-12 N2159H - Jul 12, 15:55 UTCJul 12, 16:55 UTC1h 0m
2026-07-12 N2159H BVY → BVY Jul 12, 14:01 UTCJul 12, 14:50 UTC50m
2026-07-11 N2159H - Jul 11, 21:40 UTCJul 11, 22:45 UTC1h 5m
2026-07-11 N2159H - Jul 11, 19:45 UTCJul 11, 20:30 UTC45m
2026-07-11 N2159H - Jul 11, 16:10 UTCJul 11, 16:55 UTC45m
2026-07-11 N2159H - Jul 11, 14:30 UTCJul 11, 14:55 UTC25m
2026-07-11 N2159H - Jul 11, 12:45 UTCJul 11, 13:45 UTC1h 0m
2026-06-30 N2159H - Jun 30, 18:25 UTCJun 30, 19:35 UTC1h 10m
2026-06-30 N2159H - Jun 30, 17:00 UTCJun 30, 17:40 UTC40m
2026-06-30 N2159H BVY → BVY Jun 30, 14:55 UTCJun 30, 15:35 UTC40m
2026-06-30 N2159H - Jun 30, 13:00 UTCJun 30, 13:55 UTC55m
2026-06-29 N2159H - Jun 29, 23:39 UTCJun 30, 00:14 UTC35m
2026-06-29 N2159H - Jun 29, 21:09 UTCJun 29, 22:44 UTC1h 35m
2026-06-29 N2159H - Jun 29, 15:54 UTCJun 29, 16:55 UTC1h 0m
2026-06-29 N2159H - Jun 29, 14:04 UTCJun 29, 14:54 UTC50m
2026-06-28 N2159H BVY → BVY Jun 28, 21:50 UTCJun 28, 22:49 UTC1h 0m
2026-06-28 N2159H - Jun 28, 18:29 UTCJun 28, 18:59 UTC30m
2026-06-28 N2159H BVY → BVY Jun 28, 16:55 UTCJun 28, 17:30 UTC35m
2026-06-27 N2159H - Jun 27, 20:55 UTCJun 27, 21:44 UTC50m
2026-06-27 N2159H - Jun 27, 19:15 UTCJun 27, 19:49 UTC35m
2026-06-27 N2159H - Jun 27, 17:49 UTCJun 27, 18:35 UTC45m
2026-06-27 N2159H - Jun 27, 15:34 UTCJun 27, 16:39 UTC1h 5m
2026-06-26 N2159H - Jun 26, 19:45 UTCJun 26, 20:59 UTC1h 15m
2026-06-26 N2159H BVY → BVY Jun 26, 16:35 UTCJun 26, 17:09 UTC35m
2026-06-25 N2159H BVY → BVY Jun 25, 22:54 UTCJun 26, 00:20 UTC1h 25m
2026-06-25 N2159H - Jun 25, 21:10 UTCJun 25, 21:40 UTC30m
2026-06-25 N2159H - Jun 25, 20:05 UTCJun 25, 20:30 UTC25m
2026-06-25 N2159H - Jun 25, 16:55 UTCJun 25, 18:04 UTC1h 10m
2026-06-24 N2159H - Jun 24, 22:45 UTCJun 24, 23:40 UTC55m
2026-06-24 N2159H - Jun 24, 21:00 UTCJun 24, 21:40 UTC40m
2026-06-24 N2159H - Jun 24, 16:54 UTCJun 24, 17:05 UTC10m
2026-06-16 N2159H - Jun 16, 14:30 UTCJun 16, 14:39 UTC10m
2026-06-16 N2159H - Jun 16, 12:39 UTCJun 16, 13:55 UTC1h 15m
2026-06-14 N2159H - Jun 14, 17:10 UTCJun 14, 18:10 UTC1h 0m
2026-06-13 N2159H - Jun 13, 17:45 UTCJun 13, 18:10 UTC25m
2026-06-13 N2159H - Jun 13, 14:40 UTCJun 13, 15:00 UTC20m
2026-06-12 N2159H - Jun 12, 18:15 UTCJun 12, 18:35 UTC20m
2026-06-12 N2159H - Jun 12, 16:15 UTCJun 12, 16:55 UTC40m
2026-06-12 N2159H BVY → BVY Jun 12, 13:35 UTCJun 12, 14:30 UTC55m
2026-06-11 N2159H - Jun 11, 20:40 UTCJun 11, 21:30 UTC50m
2026-06-10 N2159H - Jun 10, 14:35 UTCJun 10, 15:20 UTC45m
2026-06-10 N2159H - Jun 10, 12:50 UTCJun 10, 13:55 UTC1h 5m
2026-06-09 N2159H BVY → BVY Jun 9, 13:40 UTCJun 9, 14:40 UTC1h 0m
2026-06-09 N2159H BVY → BVY Jun 9, 12:30 UTCJun 9, 12:45 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 N2159H page for operator, model, and routing details .

Mode-S A1CFB0 frequently asked

What is Mode-S code A1CFB0?
A1CFB0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2159H.
Where is Mode-S A1CFB0 registered?
Mode-S code A1CFB0 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 A1CFB0 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1CFB0, octal 50347660, decimal 10,604,464.
What flights does A1CFB0 operate?
Mode-S A1CFB0 has broadcast 1 distinct callsign, including N2159H.