Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9F3AD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N740MR · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A9F3AD
Octal
52371655
Decimal
11,137,965
Country
US
Tail
N740MR
Type
E170
No current signal · last broadcast 2d ago
Flights observed
4
Distinct callsigns
2
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A9F3AD.

Country allocation

The ICAO 24-bit address A9F3AD 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
ENY4215 - 2 2026-04-12
ENY3787 Envoy Air 2 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 ENY3787 IND → DCA Apr 13, 00:20 UTCApr 13, 02:00 UTC1h 40m
2026-04-13 ENY3787 IND → DCA Apr 13, 00:10 UTCApr 13, 02:00 UTC1h 50m
2026-04-12 ENY4215 - Apr 12, 18:50 UTCApr 12, 19:58 UTC1h 8m
2026-04-12 ENY4215 - Apr 12, 17:15 UTCApr 12, 17:35 UTC20m

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 N740MR page for operator, model, and routing details .

Mode-S A9F3AD frequently asked

What is Mode-S code A9F3AD?
A9F3AD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N740MR.
Where is Mode-S A9F3AD registered?
Mode-S code A9F3AD 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 A9F3AD broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9F3AD, octal 52371655, decimal 11,137,965.
What flights does A9F3AD operate?
Mode-S A9F3AD has broadcast 2 distinct callsigns, including ENY4215, ENY3787.