Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 3h ago
Flights observed
181
Distinct callsigns
20
Country
US
Last broadcast
3h 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 17 2026-05-25
KAP2112 Cape Air 17 2026-06-05
KAP325 Cape Air 15 2026-06-11
KAPT9 - 13 2026-05-06
KAP758 Cape Air 11 2026-05-27
KAPT388 - 8 2026-05-22
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
KAP2160 Cape Air 5 2026-05-12
KAP1870 Cape Air 5 2026-06-13
KAPT241 - 4 2026-04-29
KAP86 Cape Air 4 2026-06-13
KAP729 Cape Air 4 2026-04-26
KAP14 Cape Air 4 2026-05-29
KAP1226 Cape Air 4 2026-06-19
KAP978 Cape Air 3 2026-04-22
KAPT978 - 2 2026-05-20
KAP801 - 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-19 KAP82 BOS → RKD Jun 19, 22:24 UTCJun 19, 23:19 UTC55m
2026-06-19 KAP6158 - Jun 19, 20:40 UTCJun 19, 21:04 UTC25m
2026-06-19 KAP1226 BOS → ACK Jun 19, 19:09 UTCJun 19, 19:19 UTC10m
2026-06-19 KAP1226 BOS → ACK Jun 19, 16:19 UTCJun 19, 18:09 UTC1h 50m
2026-06-19 KAP1226 BOS → ACK Jun 19, 13:50 UTCJun 19, 15:09 UTC1h 20m
2026-06-19 KAP1226 BOS → ACK Jun 19, 12:04 UTCJun 19, 12:14 UTC10m
2026-06-19 KAP801 - Jun 19, 00:14 UTCJun 19, 00:29 UTC15m
2026-06-18 KAP801 - Jun 18, 22:05 UTCJun 18, 22:40 UTC35m
2026-06-18 KAP7162 - Jun 18, 20:30 UTCJun 18, 21:15 UTC45m
2026-06-17 KAPT787 - Jun 17, 23:10 UTCJun 18, 00:50 UTC1h 40m
2026-06-13 KAP86 SLK → JFK Jun 13, 12:50 UTCJun 13, 13:50 UTC1h 0m
2026-06-13 KAP1870 LEB → BOS Jun 13, 11:15 UTCJun 13, 12:00 UTC45m
2026-06-12 KAP86 SLK → JFK Jun 12, 21:30 UTCJun 12, 22:20 UTC50m
2026-06-12 KAP1880 LEB → BOS Jun 12, 19:55 UTCJun 12, 20:45 UTC50m
2026-06-12 KAP86 SLK → JFK Jun 12, 18:10 UTCJun 12, 19:00 UTC50m
2026-06-12 KAP1874 LEB → BOS Jun 12, 15:10 UTCJun 12, 15:50 UTC40m
2026-06-12 KAP86 SLK → JFK Jun 12, 13:40 UTCJun 12, 14:25 UTC45m
2026-06-12 KAP1870 LEB → BOS Jun 12, 12:25 UTCJun 12, 13:10 UTC45m
2026-06-11 KAP325 LEB → HPN Jun 11, 20:55 UTCJun 11, 22:05 UTC1h 10m
2026-06-11 KAP325 LEB → HPN Jun 11, 19:00 UTCJun 11, 20:20 UTC1h 20m
2026-06-11 KAP325 LEB → HPN Jun 11, 14:30 UTCJun 11, 15:45 UTC1h 15m
2026-06-11 KAP325 LEB → HPN Jun 11, 12:55 UTCJun 11, 14:00 UTC1h 5m
2026-06-10 KAP325 LEB → HPN Jun 10, 21:10 UTCJun 10, 22:15 UTC1h 5m
2026-06-10 KAP325 LEB → HPN Jun 10, 19:00 UTCJun 10, 20:15 UTC1h 15m
2026-06-10 KAP325 LEB → HPN Jun 10, 13:10 UTCJun 10, 14:10 UTC1h 0m
2026-06-10 KAP325 LEB → HPN Jun 10, 11:10 UTCJun 10, 12:20 UTC1h 10m
2026-06-09 KAP325 LEB → HPN Jun 9, 21:15 UTCJun 9, 22:35 UTC1h 20m
2026-06-09 KAP325 LEB → HPN Jun 9, 19:15 UTCJun 9, 20:20 UTC1h 5m
2026-06-09 KAP325 LEB → HPN Jun 9, 13:15 UTCJun 9, 14:25 UTC1h 10m
2026-06-09 KAP325 LEB → HPN Jun 9, 11:35 UTCJun 9, 12:40 UTC1h 5m
2026-06-08 KAP325 LEB → HPN Jun 8, 21:05 UTCJun 8, 22:15 UTC1h 10m
2026-06-08 KAP325 LEB → HPN Jun 8, 19:20 UTCJun 8, 20:25 UTC1h 5m
2026-06-08 KAP325 LEB → HPN Jun 8, 13:15 UTCJun 8, 16:05 UTC2h 50m
2026-06-07 KAP501 LEB → HPN Jun 7, 21:40 UTCJun 7, 22:30 UTC50m
2026-06-07 KAP1880 LEB → BOS Jun 7, 20:10 UTCJun 7, 21:00 UTC50m
2026-06-07 KAP501 LEB → HPN Jun 7, 18:10 UTCJun 7, 19:00 UTC50m
2026-06-07 KAP1874 LEB → BOS Jun 7, 15:10 UTCJun 7, 15:55 UTC45m
2026-06-07 KAP501 LEB → HPN Jun 7, 12:55 UTCJun 7, 13:45 UTC50m
2026-06-07 KAP1870 LEB → BOS Jun 7, 11:30 UTCJun 7, 12:15 UTC45m
2026-06-06 KAP501 LEB → HPN Jun 6, 21:40 UTCJun 6, 22:25 UTC45m
2026-06-06 KAP1880 LEB → BOS Jun 6, 19:50 UTCJun 6, 20:30 UTC40m
2026-06-06 KAP501 LEB → HPN Jun 6, 18:09 UTCJun 6, 18:50 UTC40m
2026-06-06 KAP1874 LEB → BOS Jun 6, 15:05 UTCJun 6, 15:54 UTC50m
2026-06-05 KAP1333 BOS → BHB Jun 5, 21:25 UTCJun 5, 22:40 UTC1h 15m
2026-06-05 KAP1333 BOS → BHB Jun 5, 19:40 UTCJun 5, 20:50 UTC1h 10m
2026-06-05 KAP2112 LEB → BOS Jun 5, 13:35 UTCJun 5, 14:45 UTC1h 10m
2026-06-05 KAP2112 LEB → BOS Jun 5, 11:55 UTCJun 5, 13:05 UTC1h 10m
2026-06-04 KAP2112 LEB → BOS Jun 4, 22:15 UTCJun 4, 22:55 UTC40m
2026-06-04 KAP1880 LEB → BOS Jun 4, 20:10 UTCJun 4, 20:55 UTC45m
2026-06-04 KAP2112 LEB → BOS Jun 4, 18:20 UTCJun 4, 19:05 UTC45m

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 3h 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, KAP2112, KAP325, KAPT9, KAP758.