Apparatus

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sensors Mode-S transponder

A1BFB7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2111C · PIPER PA-28-201T/235/236 · operated by KEY CITY FLIERS

Hex
A1BFB7
Octal
50337667
Decimal
10,600,375
Country
US
Tail
N2111C
Type
P28B
No current signal · last broadcast Jul 22, 00:25 UTC
Flights observed
87
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 00:25 UTC

Last known position

Most recent position reported by Mode-S A1BFB7.

Country allocation

The ICAO 24-bit address A1BFB7 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
N2111C - 87 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N2111C - Jul 22, 00:05 UTCJul 22, 00:25 UTC20m
2026-07-21 N2111C - Jul 21, 22:15 UTCJul 21, 22:35 UTC20m
2026-07-19 N2111C - Jul 19, 16:25 UTCJul 19, 17:10 UTC45m
2026-07-19 N2111C - Jul 19, 14:10 UTCJul 19, 14:30 UTC20m
2026-07-19 N2111C - Jul 19, 13:00 UTCJul 19, 13:35 UTC35m
2026-07-14 N2111C DBQ → DBQ Jul 14, 02:40 UTCJul 14, 05:15 UTC2h 35m
2026-07-10 N2111C DBQ → DBQ Jul 10, 02:35 UTCJul 10, 04:15 UTC1h 40m
2026-07-07 N2111C - Jul 7, 16:55 UTCJul 7, 17:40 UTC45m
2026-07-07 N2111C - Jul 7, 11:45 UTCJul 7, 15:35 UTC3h 50m
2026-07-05 N2111C - Jul 5, 15:30 UTCJul 5, 17:55 UTC2h 25m
2026-07-05 N2111C - Jul 5, 11:55 UTCJul 5, 14:25 UTC2h 30m
2026-07-04 N2111C - Jul 4, 20:00 UTCJul 4, 20:35 UTC35m
2026-07-04 N2111C - Jul 4, 19:00 UTCJul 4, 19:10 UTC10m
2026-07-04 N2111C - Jul 4, 17:20 UTCJul 4, 18:15 UTC55m
2026-07-04 N2111C - Jul 4, 13:50 UTCJul 4, 14:00 UTC10m
2026-07-03 N2111C - Jul 3, 20:15 UTCJul 3, 20:40 UTC25m
2026-07-03 N2111C - Jul 3, 17:50 UTCJul 3, 18:20 UTC30m
2026-06-27 N2111C DSM → DBQ Jun 27, 18:45 UTCJun 27, 19:55 UTC1h 10m
2026-06-27 N2111C DBQ → DSM Jun 27, 15:39 UTCJun 27, 17:09 UTC1h 30m
2026-06-25 N2111C DBQ → DBQ Jun 25, 18:15 UTCJun 25, 18:29 UTC15m
2026-06-25 N2111C - Jun 25, 12:19 UTCJun 25, 12:50 UTC30m
2026-06-25 N2111C - Jun 25, 11:15 UTCJun 25, 11:39 UTC25m
2026-06-24 N2111C DBQ → DBQ Jun 24, 15:49 UTCJun 24, 16:14 UTC25m
2026-06-23 N2111C DBQ → DBQ Jun 23, 11:19 UTCJun 23, 13:00 UTC1h 40m
2026-06-21 N2111C DBQ → DBQ Jun 21, 13:50 UTCJun 21, 15:15 UTC1h 25m
2026-06-20 N2111C - Jun 20, 15:24 UTCJun 20, 16:39 UTC1h 15m
2026-06-19 N2111C - Jun 19, 18:54 UTCJun 19, 20:04 UTC1h 10m
2026-06-18 N2111C DBQ → DBQ Jun 18, 19:10 UTCJun 18, 20:10 UTC1h 0m
2026-06-18 N2111C DBQ → DBQ Jun 18, 13:30 UTCJun 18, 14:10 UTC40m
2026-06-16 N2111C - Jun 16, 13:25 UTCJun 16, 14:25 UTC1h 0m
2026-06-16 N2111C DBQ → DBQ Jun 16, 12:05 UTCJun 16, 12:55 UTC50m
2026-06-14 N2111C - Jun 14, 16:05 UTCJun 14, 17:15 UTC1h 10m
2026-06-12 N2111C - Jun 12, 23:30 UTCJun 13, 01:00 UTC1h 30m
2026-06-12 N2111C - Jun 12, 19:45 UTCJun 12, 21:30 UTC1h 45m
2026-06-12 N2111C - Jun 12, 16:55 UTCJun 12, 19:10 UTC2h 15m
2026-06-12 N2111C - Jun 12, 12:25 UTCJun 12, 16:15 UTC3h 50m
2026-06-07 N2111C - Jun 7, 19:40 UTCJun 7, 22:45 UTC3h 5m
2026-06-07 N2111C - Jun 7, 16:00 UTCJun 7, 18:45 UTC2h 45m
2026-06-05 N2111C - Jun 5, 18:15 UTCJun 5, 18:25 UTC10m
2026-06-05 N2111C - Jun 5, 14:35 UTCJun 5, 17:40 UTC3h 5m
2026-06-04 N2111C - Jun 4, 03:30 UTCJun 4, 04:15 UTC45m
2026-06-04 N2111C - Jun 4, 02:05 UTCJun 4, 02:45 UTC40m
2026-06-03 N2111C - Jun 3, 21:20 UTCJun 3, 23:00 UTC1h 40m
2026-06-03 N2111C - Jun 3, 11:15 UTCJun 3, 13:00 UTC1h 45m
2026-06-02 N2111C - Jun 2, 12:50 UTCJun 2, 13:10 UTC20m
2026-06-02 N2111C - Jun 2, 11:30 UTCJun 2, 12:05 UTC35m
2026-06-01 N2111C - Jun 1, 23:40 UTCJun 2, 00:30 UTC50m
2026-06-01 N2111C - Jun 1, 21:35 UTCJun 1, 21:55 UTC20m
2026-06-01 N2111C DBQ → DBQ Jun 1, 01:50 UTCJun 1, 02:30 UTC40m
2026-05-30 N2111C DBQ → DBQ May 30, 13:00 UTCMay 30, 13:40 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 N2111C page for operator, model, and routing details .

Mode-S A1BFB7 frequently asked

What is Mode-S code A1BFB7?
A1BFB7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2111C.
Where is Mode-S A1BFB7 registered?
Mode-S code A1BFB7 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 A1BFB7 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 00:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1BFB7, octal 50337667, decimal 10,600,375.
What flights does A1BFB7 operate?
Mode-S A1BFB7 has broadcast 1 distinct callsign, including N2111C.