sensors Mode-S transponder

A761FC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N575LF · AIRBUS HELICOPTERS EC-145 · operated by WEST PENN ALLEGHENY FOUNDATION LLC

Hex
A761FC
Octal
51660774
Decimal
10,969,596
Country
US
Tail
N575LF
Type
EC45
No current signal · last broadcast 20h ago
Flights observed
9
Distinct callsigns
1
Country
US
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S A761FC.

Country allocation

The ICAO 24-bit address A761FC 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
N575LF - 9 2026-04-14

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 N575LF - Apr 14, 10:50 UTCApr 14, 11:00 UTC10m
2026-04-14 N575LF - Apr 14, 10:05 UTCApr 14, 10:15 UTC10m
2026-04-14 N575LF - Apr 14, 08:25 UTCApr 14, 08:35 UTC10m
2026-04-13 N575LF - Apr 13, 19:50 UTCApr 13, 20:00 UTC10m
2026-04-13 N575LF - Apr 13, 19:40 UTCApr 13, 20:00 UTC20m
2026-04-13 N575LF - Apr 13, 18:45 UTCApr 13, 19:00 UTC15m
2026-04-13 N575LF - Apr 13, 09:15 UTCApr 13, 09:50 UTC35m
2026-04-13 N575LF - Apr 13, 07:00 UTCApr 13, 07:35 UTC35m
2026-04-12 N575LF - Apr 12, 19:20 UTCApr 12, 20:10 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 N575LF page for operator, model, and routing details .

Mode-S A761FC frequently asked

What is Mode-S code A761FC?
A761FC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N575LF.
Where is Mode-S A761FC registered?
Mode-S code A761FC 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 A761FC broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A761FC, octal 51660774, decimal 10,969,596.
What flights does A761FC operate?
Mode-S A761FC has broadcast 1 distinct callsign, including N575LF.