Apparatus

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sensors Mode-S transponder

A3D014

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N345CA · TECNAM P-2012 Traveller · operated by HYANNIS AIR SERVICE INC

Hex
A3D014
Octal
50750024
Decimal
10,735,636
Country
US
Tail
N345CA
Type
P212
No current signal · last broadcast 23h ago
Flights observed
9
Distinct callsigns
1
Country
US
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S A3D014.

Country allocation

The ICAO 24-bit address A3D014 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 1 distinct

Callsign Airline Flights Last seen
KAP1223 Cape Air 9 2026-04-13

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-13 KAP1223 HPN → LEB Apr 13, 21:50 UTCApr 13, 23:00 UTC1h 10m
2026-04-13 KAP1223 HPN → LEB Apr 13, 20:10 UTCApr 13, 20:50 UTC40m
2026-04-13 KAP1223 HPN → LEB Apr 13, 18:20 UTCApr 13, 19:30 UTC1h 10m
2026-04-13 KAP1223 HPN → LEB Apr 13, 14:55 UTCApr 13, 15:35 UTC40m
2026-04-13 KAP1223 HPN → LEB Apr 13, 12:50 UTCApr 13, 13:45 UTC55m
2026-04-13 KAP1223 HPN → LEB Apr 13, 11:55 UTCApr 13, 12:00 UTC5m
2026-04-13 KAP1223 HPN → LEB Apr 13, 11:15 UTCApr 13, 12:00 UTC45m
2026-04-12 KAP1223 HPN → LEB Apr 12, 19:45 UTCApr 12, 20:15 UTC30m
2026-04-12 KAP1223 HPN → LEB Apr 12, 18:25 UTCApr 12, 19:10 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 N345CA page for operator, model, and routing details .

Mode-S A3D014 frequently asked

What is Mode-S code A3D014?
A3D014 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N345CA.
Where is Mode-S A3D014 registered?
Mode-S code A3D014 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 A3D014 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3D014, octal 50750024, decimal 10,735,636.
What flights does A3D014 operate?
Mode-S A3D014 has broadcast 1 distinct callsign, including KAP1223.