Apparatus

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sensors Mode-S transponder

AA1DF3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N751CA · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC

Hex
AA1DF3
Octal
52416763
Decimal
11,148,787
Country
US
Tail
N751CA
Type
C402
No current signal · last broadcast 3d ago
Flights observed
123
Distinct callsigns
20
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S AA1DF3.

Country allocation

The ICAO 24-bit address AA1DF3 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 20 distinct

Callsign Airline Flights Last seen
KAP109 Cape Air 24 2026-06-05
KAP916 Cape Air 15 2026-06-03
KAP811 Cape Air 6 2026-06-09
KAP155 Cape Air 6 2026-06-01
KAPT58 - 5 2026-04-22
KAP3081 Cape Air 5 2026-05-31
KAP111 Cape Air 5 2026-05-31
KAPT9 - 4 2026-04-23
KAP707 Cape Air 4 2026-05-16
KAP519 Cape Air 4 2026-05-20
KAP407 Cape Air 4 2026-04-27
KAP3181 Cape Air 4 2026-05-31
KAP527 Cape Air 3 2026-05-21
KAP516 Cape Air 3 2026-04-25
KAP328 Cape Air 3 2026-05-16
KAP296 Cape Air 3 2026-05-18
KAP1279 Cape Air 3 2026-05-17
KAP321 Cape Air 2 2026-05-27
KAP16 Cape Air 2 2026-05-04
KAP110 Cape Air 2 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-09 KAP811 MVY → EWB Jun 9, 12:55 UTCJun 9, 13:05 UTC10m
2026-06-09 KAP811 MVY → EWB Jun 9, 11:25 UTCJun 9, 11:35 UTC10m
2026-06-08 KAP811 MVY → EWB Jun 8, 11:25 UTCJun 8, 11:35 UTC10m
2026-06-07 KAP811 MVY → EWB Jun 7, 15:50 UTCJun 7, 16:55 UTC1h 5m
2026-06-07 KAP811 MVY → EWB Jun 7, 13:55 UTCJun 7, 15:05 UTC1h 10m
2026-06-07 KAP811 MVY → EWB Jun 7, 12:00 UTCJun 7, 12:45 UTC45m
2026-06-05 KAP109 BOS → ACK Jun 5, 22:55 UTCJun 5, 23:50 UTC55m
2026-06-05 KAP109 BOS → ACK Jun 5, 21:30 UTCJun 5, 22:00 UTC30m
2026-06-05 KAP109 BOS → ACK Jun 5, 19:35 UTCJun 5, 20:00 UTC25m
2026-06-05 KAP109 BOS → ACK Jun 5, 18:20 UTCJun 5, 18:50 UTC30m
2026-06-05 KAP109 BOS → ACK Jun 5, 16:50 UTCJun 5, 17:15 UTC25m
2026-06-05 KAP109 BOS → ACK Jun 5, 16:00 UTCJun 5, 16:20 UTC20m
2026-06-03 KAP916 AUG → BOS Jun 3, 16:10 UTCJun 3, 16:20 UTC10m
2026-06-03 KAP916 AUG → BOS Jun 3, 12:45 UTCJun 3, 13:10 UTC25m
2026-06-03 KAP916 AUG → BOS Jun 3, 11:10 UTCJun 3, 11:40 UTC30m
2026-06-03 KAP916 AUG → BOS Jun 3, 10:30 UTCJun 3, 10:40 UTC10m
2026-06-03 KAP6789 MVY → BOS Jun 3, 01:30 UTCJun 3, 01:50 UTC20m
2026-06-02 KAP109 BOS → ACK Jun 2, 23:15 UTCJun 3, 00:20 UTC1h 5m
2026-06-02 KAP109 BOS → ACK Jun 2, 21:40 UTCJun 2, 22:15 UTC35m
2026-06-02 KAP109 BOS → ACK Jun 2, 18:50 UTCJun 2, 19:20 UTC30m
2026-06-02 KAP109 BOS → ACK Jun 2, 17:40 UTCJun 2, 18:10 UTC30m
2026-06-01 KAP155 BOS → BHB Jun 1, 22:30 UTCJun 1, 22:40 UTC10m
2026-06-01 KAP155 BOS → BHB Jun 1, 21:35 UTCJun 1, 22:00 UTC25m
2026-06-01 KAP155 BOS → BHB Jun 1, 19:50 UTCJun 1, 20:30 UTC40m
2026-06-01 KAP155 BOS → BHB Jun 1, 15:05 UTCJun 1, 15:40 UTC35m
2026-06-01 KAP155 BOS → BHB Jun 1, 13:30 UTCJun 1, 14:05 UTC35m
2026-06-01 KAP155 BOS → BHB Jun 1, 11:05 UTCJun 1, 11:20 UTC15m
2026-05-31 KAP111 BOS → LEB May 31, 22:35 UTCMay 31, 23:20 UTC45m
2026-05-31 KAP3181 MVY → BOS May 31, 20:30 UTCMay 31, 21:05 UTC35m
2026-05-31 KAP111 BOS → LEB May 31, 19:10 UTCMay 31, 19:35 UTC25m
2026-05-31 KAP3081 MVY → BOS May 31, 17:30 UTCMay 31, 18:05 UTC35m
2026-05-31 KAP111 BOS → LEB May 31, 16:20 UTCMay 31, 16:30 UTC10m
2026-05-28 KAP109 BOS → ACK May 28, 23:35 UTCMay 29, 00:30 UTC55m
2026-05-28 KAP109 BOS → ACK May 28, 21:50 UTCMay 28, 22:30 UTC40m
2026-05-28 KAP109 BOS → ACK May 28, 18:55 UTCMay 28, 19:25 UTC30m
2026-05-28 KAP109 BOS → ACK May 28, 17:35 UTCMay 28, 18:05 UTC30m
2026-05-28 KAP109 BOS → ACK May 28, 16:45 UTCMay 28, 16:55 UTC10m
2026-05-27 KAP321 BOS → MVY May 27, 22:35 UTCMay 27, 23:30 UTC55m
2026-05-27 KAP3181 MVY → BOS May 27, 20:35 UTCMay 27, 21:05 UTC30m
2026-05-27 KAP321 BOS → MVY May 27, 18:40 UTCMay 27, 19:05 UTC25m
2026-05-27 KAP3081 MVY → BOS May 27, 17:20 UTCMay 27, 17:50 UTC30m
2026-05-25 KAP109 BOS → ACK May 25, 23:30 UTCMay 26, 00:19 UTC50m
2026-05-25 KAP109 BOS → ACK May 25, 21:45 UTCMay 25, 22:19 UTC35m
2026-05-25 KAP109 BOS → ACK May 25, 20:19 UTCMay 25, 20:55 UTC35m
2026-05-25 KAP5241 ACK → BOS May 25, 18:55 UTCMay 25, 19:35 UTC40m
2026-05-25 KAP109 BOS → ACK May 25, 16:40 UTCMay 25, 16:55 UTC15m
2026-05-24 KAP111 BOS → LEB May 24, 18:40 UTCMay 24, 19:25 UTC45m
2026-05-24 KAP3081 MVY → BOS May 24, 17:30 UTCMay 24, 17:55 UTC25m
2026-05-24 KAP111 BOS → LEB May 24, 16:30 UTCMay 24, 16:50 UTC20m
2026-05-23 KAPT818 - May 23, 17:30 UTCMay 23, 18:45 UTC1h 15m

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 N751CA page for operator, model, and routing details .

Mode-S AA1DF3 frequently asked

What is Mode-S code AA1DF3?
AA1DF3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N751CA.
Where is Mode-S AA1DF3 registered?
Mode-S code AA1DF3 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 AA1DF3 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA1DF3, octal 52416763, decimal 11,148,787.
What flights does AA1DF3 operate?
Mode-S AA1DF3 has broadcast 20 distinct callsigns, including KAP109, KAP916, KAP811, KAP155, KAPT58.