sensors Mode-S transponder

A74E6E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N570AE · AEROSPATIALE AS-350 Ecureuil · operated by TEMSCO HELICOPTERS INC

Hex
A74E6E
Octal
51647156
Decimal
10,964,590
Country
US
Tail
N570AE
Type
AS50
No current signal · last broadcast 1d ago
Flights observed
3
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A74E6E.

Country allocation

The ICAO 24-bit address A74E6E 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
N570AE - 3 2026-04-13

Recent flights last 3

DateFlightRouteTakeoffLandingDuration
2026-04-13 N570AE - Apr 13, 19:50 UTCApr 13, 20:30 UTC40m
2026-04-13 N570AE - Apr 13, 18:05 UTCApr 13, 20:10 UTC2h 5m
2026-04-12 N570AE - Apr 12, 23:55 UTCApr 13, 00:05 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 N570AE page for operator, model, and routing details .

Mode-S A74E6E frequently asked

What is Mode-S code A74E6E?
A74E6E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N570AE.
Where is Mode-S A74E6E registered?
Mode-S code A74E6E 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 A74E6E 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 A74E6E, octal 51647156, decimal 10,964,590.
What flights does A74E6E operate?
Mode-S A74E6E has broadcast 1 distinct callsign, including N570AE.