Apparatus

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sensors Mode-S transponder

A6717A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N514NC · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC

Hex
A6717A
Octal
51470572
Decimal
10,908,026
Country
US
Tail
N514NC
Type
C402
No current signal · last broadcast 1d ago
Flights observed
8
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A6717A.

Country allocation

The ICAO 24-bit address A6717A 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 2 distinct

Callsign Airline Flights Last seen
KAP548 Cape Air 5 2026-04-13
KAP7 Cape Air 3 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 KAP548 BHB → BOS Apr 13, 22:05 UTCApr 13, 22:40 UTC35m
2026-04-13 KAP548 BHB → BOS Apr 13, 20:05 UTCApr 13, 20:45 UTC40m
2026-04-13 KAP548 BHB → BOS Apr 13, 17:25 UTCApr 13, 17:50 UTC25m
2026-04-13 KAP7 BOS → BHB Apr 13, 16:15 UTCApr 13, 16:35 UTC20m
2026-04-13 KAP7 BOS → BHB Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 KAP7 BOS → BHB Apr 13, 14:15 UTCApr 13, 14:45 UTC30m
2026-04-13 KAP548 BHB → BOS Apr 13, 12:25 UTCApr 13, 13:05 UTC40m
2026-04-12 KAP548 BHB → BOS Apr 12, 17:15 UTCApr 12, 18:05 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 N514NC page for operator, model, and routing details .

Mode-S A6717A frequently asked

What is Mode-S code A6717A?
A6717A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N514NC.
Where is Mode-S A6717A registered?
Mode-S code A6717A 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 A6717A 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 A6717A, octal 51470572, decimal 10,908,026.
What flights does A6717A operate?
Mode-S A6717A has broadcast 2 distinct callsigns, including KAP548, KAP7.