Apparatus

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sensors Mode-S transponder

A9FDE2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N743CA · TECNAM P-2012 Traveller · operated by HYANNIS AIR SERVICE INC

Hex
A9FDE2
Octal
52376742
Decimal
11,140,578
Country
US
Tail
N743CA
Type
P212
No current signal · last broadcast 26d ago
Flights observed
309
Distinct callsigns
20
Country
US
Last broadcast
26d ago

Last known position

Most recent position reported by Mode-S A9FDE2.

Country allocation

The ICAO 24-bit address A9FDE2 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
KAP734 Cape Air 31 2026-07-18
KAP922 - 22 2026-07-10
KAP5050 - 19 2026-06-25
KAP2112 Cape Air 17 2026-06-05
KAP325 Cape Air 15 2026-06-11
KAPT9 - 13 2026-05-06
KAP1226 - 12 2026-07-17
KAP758 Cape Air 11 2026-05-27
KAPT388 - 8 2026-05-22
KAP418 Cape Air 8 2026-07-23
KAP1850 - 8 2026-06-27
KAP501 Cape Air 7 2026-06-07
KAP1880 Cape Air 7 2026-06-12
KAP1874 Cape Air 7 2026-06-12
KAP155 Cape Air 7 2026-05-24
KAP926 - 5 2026-07-01
KAP729 Cape Air 5 2026-07-19
KAP2160 Cape Air 5 2026-05-12
KAP216 Cape Air 5 2026-07-26
KAP1876 - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAP216 ISP → BOS Jul 26, 22:00 UTCJul 26, 22:30 UTC30m
2026-07-26 KAP219 ACK → PVC Jul 26, 15:15 UTCJul 26, 16:25 UTC1h 10m
2026-07-26 KAP212 BHB → BOS Jul 26, 13:25 UTCJul 26, 14:25 UTC1h 0m
2026-07-25 KAP213 ISP → BOS Jul 25, 21:30 UTCJul 25, 22:35 UTC1h 5m
2026-07-25 KAP214 ISP → BOS Jul 25, 19:15 UTCJul 25, 20:15 UTC1h 0m
2026-07-25 KAP211 BOS → ISP Jul 25, 13:10 UTCJul 25, 14:20 UTC1h 10m
2026-07-25 KAP210 ISP → BOS Jul 25, 11:30 UTCJul 25, 12:30 UTC1h 0m
2026-07-24 KAP213 ISP → BOS Jul 24, 21:05 UTCJul 24, 22:10 UTC1h 5m
2026-07-24 KAP210 ISP → BOS Jul 24, 11:35 UTCJul 24, 12:30 UTC55m
2026-07-23 KAP418 BOS → BHB Jul 23, 22:55 UTCJul 23, 23:55 UTC1h 0m
2026-07-23 KAP214 ISP → BOS Jul 23, 21:05 UTCJul 23, 22:05 UTC1h 0m
2026-07-23 KAP418 BOS → BHB Jul 23, 16:30 UTCJul 23, 17:40 UTC1h 10m
2026-07-23 KAP216 ISP → BOS Jul 23, 14:20 UTCJul 23, 15:25 UTC1h 5m
2026-07-23 KAP418 BOS → BHB Jul 23, 00:00 UTCJul 23, 01:15 UTC1h 15m
2026-07-22 KAP7121 HYA → BOS Jul 22, 22:20 UTCJul 22, 23:00 UTC40m
2026-07-22 KAP418 BOS → BHB Jul 22, 16:35 UTCJul 22, 17:05 UTC30m
2026-07-22 KAP216 ISP → BOS Jul 22, 14:15 UTCJul 22, 15:10 UTC55m
2026-07-20 KAP418 BOS → BHB Jul 20, 23:45 UTCJul 21, 00:50 UTC1h 5m
2026-07-20 KAP5601 ACK → BOS Jul 20, 22:10 UTCJul 20, 22:55 UTC45m
2026-07-20 KAP418 - Jul 20, 16:45 UTCJul 20, 17:10 UTC25m
2026-07-20 KAP216 ISP → BOS Jul 20, 14:50 UTCJul 20, 15:55 UTC1h 5m
2026-07-20 KAP418 - Jul 20, 01:45 UTCJul 20, 02:10 UTC25m
2026-07-20 KAP217 BOS → ISP Jul 20, 00:00 UTCJul 20, 00:55 UTC55m
2026-07-19 KAP216 ISP → BOS Jul 19, 22:00 UTCJul 19, 23:10 UTC1h 10m
2026-07-19 KAP418 - Jul 19, 15:45 UTCJul 19, 16:55 UTC1h 10m
2026-07-19 KAP212 BHB → BOS Jul 19, 13:45 UTCJul 19, 14:55 UTC1h 10m
2026-07-19 KAP729 ORD → BRL Jul 19, 11:35 UTCJul 19, 12:50 UTC1h 15m
2026-07-18 KAP734 BOS → HYA Jul 18, 22:30 UTCJul 18, 23:50 UTC1h 20m
2026-07-18 KAP5201 ACK → BOS Jul 18, 21:15 UTCJul 18, 21:55 UTC40m
2026-07-18 KAP734 BOS → HYA Jul 18, 17:45 UTCJul 18, 19:10 UTC1h 25m
2026-07-18 KAP734 BOS → HYA Jul 18, 15:05 UTCJul 18, 16:20 UTC1h 15m
2026-07-18 KAP734 BOS → HYA Jul 18, 13:50 UTCJul 18, 14:00 UTC10m
2026-07-17 KAP1226 - Jul 17, 20:50 UTCJul 17, 21:20 UTC30m
2026-07-17 KAP1876 LEB → BOS Jul 17, 18:55 UTCJul 17, 19:40 UTC45m
2026-07-17 KAP1226 BOS → LEB Jul 17, 16:34 UTCJul 17, 17:30 UTC55m
2026-07-17 KAP7101 - Jul 17, 15:00 UTCJul 17, 15:25 UTC25m
2026-07-17 KAP1226 - Jul 17, 12:35 UTCJul 17, 13:00 UTC25m
2026-07-17 KAP7041 - Jul 17, 11:10 UTCJul 17, 11:35 UTC25m
2026-07-16 KAP734 - Jul 16, 20:35 UTCJul 16, 21:00 UTC25m
2026-07-16 KAP1876 LEB → BOS Jul 16, 18:59 UTCJul 16, 19:50 UTC50m
2026-07-16 KAP734 BOS → LEB Jul 16, 17:05 UTCJul 16, 18:00 UTC55m
2026-07-16 KAP7101 - Jul 16, 15:14 UTCJul 16, 15:40 UTC25m
2026-07-16 KAP734 - Jul 16, 00:20 UTCJul 16, 00:35 UTC15m
2026-07-15 KAP734 - Jul 15, 21:55 UTCJul 15, 23:40 UTC1h 45m
2026-07-15 KAP734 - Jul 15, 17:05 UTCJul 15, 17:35 UTC30m
2026-07-15 KAP5081 - Jul 15, 15:35 UTCJul 15, 16:10 UTC35m
2026-07-15 KAP734 - Jul 15, 13:50 UTCJul 15, 14:20 UTC30m
2026-07-15 KAP5041 - Jul 15, 12:20 UTCJul 15, 12:55 UTC35m
2026-07-14 KAP734 - Jul 14, 21:15 UTCJul 14, 21:30 UTC15m
2026-07-14 KAP734 - Jul 14, 16:55 UTCJul 14, 17:25 UTC30m

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 N743CA page for operator, model, and routing details .

Mode-S A9FDE2 frequently asked

What is Mode-S code A9FDE2?
A9FDE2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N743CA.
Where is Mode-S A9FDE2 registered?
Mode-S code A9FDE2 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 A9FDE2 broadcasting right now?
No active broadcast right now. Last signal was 26d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9FDE2, octal 52376742, decimal 11,140,578.
What flights does A9FDE2 operate?
Mode-S A9FDE2 has broadcast 20 distinct callsigns, including KAP734, KAP922, KAP5050, KAP2112, KAP325.