Apparatus

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sensors Mode-S transponder

AA4D12

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N763EA · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC

Hex
AA4D12
Octal
52446422
Decimal
11,160,850
Country
US
Tail
N763EA
Type
C402
No current signal · last broadcast 9h ago
Flights observed
311
Distinct callsigns
20
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S AA4D12.

Country allocation

The ICAO 24-bit address AA4D12 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
KAP412 - 31 2026-07-09
KAP8380 Cape Air 14 2026-07-25
KAP111 Cape Air 14 2026-06-15
KAP876 - 10 2026-07-06
KAP106 Cape Air 10 2026-05-21
KAP616 - 9 2026-06-25
KAP95 Cape Air 8 2026-07-26
KAP519 - 8 2026-06-26
KAP615 - 7 2026-06-23
KAP6 - 7 2026-06-21
KAP3285 - 7 2026-07-11
KAP1271 - 7 2026-06-16
KAP328 - 6 2026-06-29
KAP235 - 6 2026-07-02
KAP14 Cape Air 6 2026-07-22
KAP107 Cape Air 6 2026-05-03
KAP916 Cape Air 5 2026-06-16
KAP91 Cape Air 5 2026-04-21
KAP811 - 5 2026-07-12
KAP763 Cape Air 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAP95 BOS → RKD Jul 26, 00:30 UTCJul 26, 01:25 UTC55m
2026-07-25 KAP95 BOS → RKD Jul 25, 23:00 UTCJul 25, 23:55 UTC55m
2026-07-25 KAP8380 PVD → ISP Jul 25, 21:10 UTCJul 25, 22:10 UTC1h 0m
2026-07-25 KAP8380 PVD → ISP Jul 25, 19:40 UTCJul 25, 20:35 UTC55m
2026-07-24 KAP402 AUG → BOS Jul 24, 15:15 UTCJul 24, 16:15 UTC1h 0m
2026-07-24 KAP402 AUG → BOS Jul 24, 13:10 UTCJul 24, 14:05 UTC55m
2026-07-24 KAP85 ALB → BOS Jul 24, 00:40 UTCJul 24, 01:45 UTC1h 5m
2026-07-23 KAP763 MVY → BOS Jul 23, 15:25 UTCJul 23, 16:20 UTC55m
2026-07-23 KAP763 MVY → BOS Jul 23, 13:40 UTCJul 23, 14:35 UTC55m
2026-07-22 KAP1854 RKD → BOS Jul 22, 17:15 UTCJul 22, 18:15 UTC1h 0m
2026-07-22 KAP14 BOS → RKD Jul 22, 15:05 UTCJul 22, 15:50 UTC45m
2026-07-22 KAP1862 - Jul 22, 13:00 UTCJul 22, 14:00 UTC1h 0m
2026-07-21 KAP14 BOS → RKD Jul 21, 23:05 UTCJul 22, 00:00 UTC55m
2026-07-21 KAP14 BOS → RKD Jul 21, 17:05 UTCJul 21, 18:00 UTC55m
2026-07-21 KAP14 BOS → RKD Jul 21, 15:10 UTCJul 21, 16:00 UTC50m
2026-07-21 KAP14 BOS → RKD Jul 21, 13:20 UTCJul 21, 14:15 UTC55m
2026-07-20 KAP14 BOS → RKD Jul 20, 23:15 UTCJul 21, 00:10 UTC54m
2026-07-20 KAP1008 AUG → BOS Jul 20, 13:45 UTCJul 20, 14:30 UTC45m
2026-07-19 KAP321 BOS → MVY Jul 19, 23:35 UTCJul 20, 00:25 UTC50m
2026-07-19 KAP5361 ACK → BOS Jul 19, 22:20 UTCJul 19, 22:50 UTC30m
2026-07-19 KAP321 BOS → MVY Jul 19, 21:00 UTCJul 19, 21:15 UTC15m
2026-07-19 KAP321 BOS → MVY Jul 19, 18:40 UTCJul 19, 19:05 UTC25m
2026-07-19 KAP5161 ACK → BOS Jul 19, 17:15 UTCJul 19, 17:45 UTC30m
2026-07-19 KAP321 BOS → MVY Jul 19, 15:15 UTCJul 19, 15:40 UTC25m
2026-07-19 KAP1008 AUG → BOS Jul 19, 13:00 UTCJul 19, 14:00 UTC1h 0m
2026-07-14 KAP548 - Jul 14, 21:05 UTCJul 14, 21:40 UTC35m
2026-07-14 KAP548 - Jul 14, 17:40 UTCJul 14, 18:10 UTC30m
2026-07-14 KAP548 - Jul 14, 16:35 UTCJul 14, 16:55 UTC20m
2026-07-13 KAP1845 - Jul 13, 23:40 UTCJul 14, 00:50 UTC1h 10m
2026-07-13 KAP1840 - Jul 13, 21:35 UTCJul 13, 22:45 UTC1h 10m
2026-07-13 KAP1839 - Jul 13, 16:30 UTCJul 13, 17:35 UTC1h 5m
2026-07-13 KAP1844 - Jul 13, 14:20 UTCJul 13, 15:25 UTC1h 5m
2026-07-12 KAP1845 - Jul 12, 23:35 UTCJul 13, 00:40 UTC1h 5m
2026-07-12 KAP1840 - Jul 12, 21:40 UTCJul 12, 22:50 UTC1h 10m
2026-07-12 KAP1839 - Jul 12, 17:10 UTCJul 12, 18:15 UTC1h 5m
2026-07-12 KAP811 - Jul 12, 15:55 UTCJul 12, 16:30 UTC35m
2026-07-11 KAP3285 - Jul 11, 19:00 UTCJul 11, 19:20 UTC20m
2026-07-11 KAP3285 - Jul 11, 17:10 UTCJul 11, 18:10 UTC1h 0m
2026-07-11 KAP3285 - Jul 11, 15:55 UTCJul 11, 16:25 UTC30m
2026-07-11 KAP3285 - Jul 11, 14:20 UTCJul 11, 15:05 UTC45m
2026-07-11 KAP3285 - Jul 11, 12:35 UTCJul 11, 13:05 UTC30m
2026-07-11 KAP3285 - Jul 11, 11:20 UTCJul 11, 11:55 UTC35m
2026-07-11 KAP3285 - Jul 11, 10:10 UTCJul 11, 10:20 UTC10m
2026-07-10 KAPT9 - Jul 10, 19:05 UTCJul 10, 20:25 UTC1h 20m
2026-07-10 KAPT9 - Jul 10, 15:25 UTCJul 10, 16:35 UTC1h 10m
2026-07-10 KAPT9 - Jul 10, 13:05 UTCJul 10, 14:25 UTC1h 20m
2026-07-09 KAP7091 - Jul 9, 20:20 UTCJul 9, 20:40 UTC20m
2026-07-09 KAP1876 LEB → BOS Jul 9, 19:00 UTCJul 9, 19:35 UTC35m
2026-07-09 KAP1875 BOS → LEB Jul 9, 16:55 UTCJul 9, 17:40 UTC45m
2026-07-09 KAP7101 HYA → BOS Jul 9, 15:15 UTCJul 9, 15:50 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 N763EA page for operator, model, and routing details .

Mode-S AA4D12 frequently asked

What is Mode-S code AA4D12?
AA4D12 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N763EA.
Where is Mode-S AA4D12 registered?
Mode-S code AA4D12 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 AA4D12 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA4D12, octal 52446422, decimal 11,160,850.
What flights does AA4D12 operate?
Mode-S AA4D12 has broadcast 20 distinct callsigns, including KAP412, KAP8380, KAP111, KAP876, KAP106.