Apparatus

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sensors Mode-S transponder

A6CA68

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N53695 · PARTENAVIA P-68 Observer · operated by N53695 LLC

Hex
A6CA68
Octal
51545150
Decimal
10,930,792
Country
US
Tail
N53695
Type
P68
No current signal · last broadcast 1d ago
Flights observed
9
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A6CA68.

Country allocation

The ICAO 24-bit address A6CA68 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
N53695 - 9 2026-04-13

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-13 N53695 - Apr 13, 17:25 UTCApr 13, 17:45 UTC20m
2026-04-13 N53695 - Apr 13, 16:55 UTCApr 13, 17:20 UTC25m
2026-04-13 N53695 - Apr 13, 15:55 UTCApr 13, 16:05 UTC10m
2026-04-13 N53695 TMB → TMB Apr 13, 15:20 UTCApr 13, 16:05 UTC45m
2026-04-13 N53695 TMB → TMB Apr 13, 13:25 UTCApr 13, 14:05 UTC40m
2026-04-13 N53695 TMB → TMB Apr 13, 13:00 UTCApr 13, 13:20 UTC20m
2026-04-13 N53695 TMB → TMB Apr 13, 11:50 UTCApr 13, 12:00 UTC10m
2026-04-13 N53695 TMB → TMB Apr 13, 11:25 UTCApr 13, 11:45 UTC20m
2026-04-13 N53695 TMB → TMB Apr 13, 11:05 UTCApr 13, 11:15 UTC10m

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 N53695 page for operator, model, and routing details .

Mode-S A6CA68 frequently asked

What is Mode-S code A6CA68?
A6CA68 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N53695.
Where is Mode-S A6CA68 registered?
Mode-S code A6CA68 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 A6CA68 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 A6CA68, octal 51545150, decimal 10,930,792.
What flights does A6CA68 operate?
Mode-S A6CA68 has broadcast 1 distinct callsign, including N53695.