Apparatus

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sensors Mode-S transponder

A4D80A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N411CA · TECNAM P-2012 Traveller · operated by HYANNIS AIR SERVICE INC

Hex
A4D80A
Octal
51154012
Decimal
10,803,210
Country
US
Tail
N411CA
Type
P212
No current signal · last broadcast 1d ago
Flights observed
282
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A4D80A.

Country allocation

The ICAO 24-bit address A4D80A 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
KAP155 Cape Air 20 2026-05-04
KAP18 Cape Air 17 2026-07-26
KAP14 - 16 2026-07-16
KAP480 - 15 2026-07-12
KAP2112 - 15 2026-06-23
KAP1333 - 14 2026-06-22
KAP801 - 11 2026-07-20
KAP325 - 10 2026-06-18
KAP164 - 9 2026-07-01
KAP60 - 8 2026-07-13
KAP45 Cape Air 8 2026-06-12
KAP52 - 7 2026-07-04
KAP758 Cape Air 6 2026-05-05
KAP5483 Cape Air 6 2026-06-14
KAP1874 - 6 2026-06-23
KAP1856 - 5 2026-07-16
KAP926 - 4 2026-07-08
KAP70 - 4 2026-07-12
KAP5050 - 4 2026-07-17
KAP321 Cape Air 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAP18 BOS → BHB Jul 26, 22:20 UTCJul 26, 22:30 UTC10m
2026-07-26 KAP18 BOS → BHB Jul 26, 21:15 UTCJul 26, 21:35 UTC20m
2026-07-26 KAP18 BOS → BHB Jul 26, 18:45 UTCJul 26, 19:10 UTC25m
2026-07-26 KAP18 BOS → BHB Jul 26, 17:10 UTCJul 26, 17:45 UTC35m
2026-07-26 KAP18 BOS → BHB Jul 26, 15:00 UTCJul 26, 15:35 UTC35m
2026-07-26 KAP18 BOS → BHB Jul 26, 13:20 UTCJul 26, 14:15 UTC55m
2026-07-25 KAP1009 BOS → AUG Jul 25, 23:25 UTCJul 26, 00:20 UTC55m
2026-07-25 KAP18 BOS → BHB Jul 25, 22:10 UTCJul 25, 22:45 UTC35m
2026-07-25 KAP18 BOS → BHB Jul 25, 20:10 UTCJul 25, 20:40 UTC30m
2026-07-25 KAP18 BOS → BHB Jul 25, 18:25 UTCJul 25, 18:50 UTC25m
2026-07-25 KAP18 BOS → BHB Jul 25, 15:00 UTCJul 25, 15:30 UTC30m
2026-07-25 KAP18 BOS → BHB Jul 25, 13:10 UTCJul 25, 14:05 UTC55m
2026-07-23 KAP18 BOS → BHB Jul 23, 21:35 UTCJul 23, 22:30 UTC55m
2026-07-23 KAP1006 AUG → BOS Jul 23, 19:55 UTCJul 23, 21:00 UTC1h 5m
2026-07-23 KAP18 BOS → BHB Jul 23, 17:20 UTCJul 23, 18:05 UTC45m
2026-07-23 KAP18 BOS → BHB Jul 23, 11:35 UTCJul 23, 12:40 UTC1h 5m
2026-07-22 KAP18 BOS → BHB Jul 22, 21:10 UTCJul 22, 22:00 UTC50m
2026-07-22 KAP18 BOS → BHB Jul 22, 11:30 UTCJul 22, 12:25 UTC55m
2026-07-21 KAP18 BOS → BHB Jul 21, 17:20 UTCJul 21, 18:10 UTC50m
2026-07-21 KAP111 BOS → LEB Jul 21, 13:10 UTCJul 21, 14:05 UTC55m
2026-07-20 KAP321 BOS → MVY Jul 20, 23:50 UTCJul 21, 00:45 UTC55m
2026-07-20 KAP5361 ACK → BOS Jul 20, 22:40 UTCJul 20, 23:15 UTC35m
2026-07-20 KAP321 BOS → MVY Jul 20, 20:15 UTCJul 20, 20:45 UTC30m
2026-07-20 KAP5161 ACK → BOS Jul 20, 18:25 UTCJul 20, 19:05 UTC40m
2026-07-20 KAP321 BOS → MVY Jul 20, 17:30 UTCJul 20, 17:40 UTC10m
2026-07-20 KAP321 BOS → MVY Jul 20, 16:10 UTCJul 20, 16:35 UTC25m
2026-07-20 KAP978 BOS → LEB Jul 20, 14:55 UTCJul 20, 15:25 UTC30m
2026-07-20 KAPT241 - Jul 20, 12:20 UTCJul 20, 13:20 UTC1h 0m
2026-07-20 KAP801 - Jul 20, 01:25 UTCJul 20, 02:35 UTC1h 10m
2026-07-19 KAP801 - Jul 19, 23:40 UTCJul 20, 00:40 UTC1h 0m
2026-07-19 KAP801 - Jul 19, 22:40 UTCJul 19, 23:05 UTC25m
2026-07-19 KAP7031 BOS → HYA Jul 19, 20:05 UTCJul 19, 20:25 UTC20m
2026-07-19 KAP5321 ACK → BOS Jul 19, 18:45 UTCJul 19, 19:15 UTC30m
2026-07-19 KAP5311 BOS → ACK Jul 19, 17:15 UTCJul 19, 17:50 UTC35m
2026-07-19 KAP5041 ACK → BOS Jul 19, 15:40 UTCJul 19, 16:20 UTC40m
2026-07-19 KAP5111 BOS → ACK Jul 19, 13:55 UTCJul 19, 14:30 UTC35m
2026-07-19 KAP5041 ACK → BOS Jul 19, 12:35 UTCJul 19, 13:15 UTC40m
2026-07-18 KAP6177 HYA → BOS Jul 18, 13:45 UTCJul 18, 14:05 UTC20m
2026-07-18 KAP1850 - Jul 18, 11:15 UTCJul 18, 12:20 UTC1h 5m
2026-07-17 KAP5050 BOS → RKD Jul 17, 21:44 UTCJul 17, 22:40 UTC55m
2026-07-17 KAP1858 - Jul 17, 19:35 UTCJul 17, 20:35 UTC1h 0m
2026-07-17 KAP5050 BOS → RKD Jul 17, 16:55 UTCJul 17, 18:05 UTC1h 10m
2026-07-17 KAP1852 - Jul 17, 15:05 UTCJul 17, 16:00 UTC55m
2026-07-17 KAP1851 BOS → RKD Jul 17, 13:29 UTCJul 17, 14:24 UTC55m
2026-07-17 KAP1850 RKD → BOS Jul 17, 11:15 UTCJul 17, 12:19 UTC1h 5m
2026-07-16 KAP5050 BOS → RKD Jul 16, 23:10 UTCJul 17, 00:04 UTC55m
2026-07-16 KAP1856 - Jul 16, 21:05 UTCJul 16, 22:10 UTC1h 5m
2026-07-16 KAP5050 BOS → RKD Jul 16, 19:20 UTCJul 16, 20:15 UTC55m
2026-07-16 KAP1854 RKD → BNH Jul 16, 17:00 UTCJul 16, 18:10 UTC1h 10m
2026-07-16 KAP1853 BOS → RKD Jul 16, 15:14 UTCJul 16, 16:05 UTC50m

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 N411CA page for operator, model, and routing details .

Mode-S A4D80A frequently asked

What is Mode-S code A4D80A?
A4D80A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N411CA.
Where is Mode-S A4D80A registered?
Mode-S code A4D80A 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 A4D80A broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4D80A, octal 51154012, decimal 10,803,210.
What flights does A4D80A operate?
Mode-S A4D80A has broadcast 20 distinct callsigns, including KAP155, KAP18, KAP14, KAP480, KAP2112.