Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD3FD7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N953AL · AIRBUS HELICOPTERS EC-135/635 · operated by AIR METHODS LLC

Hex
AD3FD7
Octal
53237727
Decimal
11,354,071
Country
US
Tail
N953AL
Type
EC35
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
243
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S AD3FD7.

Country allocation

The ICAO 24-bit address AD3FD7 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
N953AL - 243 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N953AL - Jul 26, 20:10 UTCJul 26, 20:35 UTC25m
2026-07-26 N953AL - Jul 26, 18:25 UTCJul 26, 18:55 UTC30m
2026-07-25 N953AL - Jul 25, 22:00 UTCJul 25, 22:55 UTC55m
2026-07-25 N953AL - Jul 25, 20:10 UTCJul 25, 21:20 UTC1h 10m
2026-07-25 N953AL - Jul 25, 08:10 UTCJul 25, 08:40 UTC30m
2026-07-25 N953AL - Jul 25, 07:45 UTCJul 25, 07:55 UTC10m
2026-07-25 N953AL - Jul 25, 06:15 UTCJul 25, 06:45 UTC30m
2026-07-24 N953AL - Jul 24, 23:30 UTCJul 24, 23:55 UTC25m
2026-07-24 N953AL - Jul 24, 21:05 UTCJul 24, 21:35 UTC30m
2026-07-24 N953AL - Jul 24, 07:05 UTCJul 24, 08:25 UTC1h 20m
2026-07-24 N953AL - Jul 24, 06:15 UTCJul 24, 06:55 UTC40m
2026-07-24 N953AL - Jul 24, 01:20 UTCJul 24, 02:05 UTC45m
2026-07-22 N953AL - Jul 22, 23:05 UTCJul 22, 23:30 UTC25m
2026-07-22 N953AL - Jul 22, 21:00 UTCJul 22, 21:25 UTC25m
2026-07-21 N953AL - Jul 21, 20:40 UTCJul 21, 21:05 UTC25m
2026-07-21 N953AL - Jul 21, 19:20 UTCJul 21, 19:30 UTC10m
2026-07-21 N953AL - Jul 21, 18:15 UTCJul 21, 18:30 UTC15m
2026-07-21 N953AL - Jul 21, 03:20 UTCJul 21, 04:00 UTC40m
2026-07-21 N953AL - Jul 21, 02:45 UTCJul 21, 03:15 UTC30m
2026-07-21 N953AL - Jul 21, 02:10 UTCJul 21, 02:35 UTC25m
2026-07-20 N953AL - Jul 20, 07:40 UTCJul 20, 08:05 UTC25m
2026-07-20 N953AL - Jul 20, 06:15 UTCJul 20, 06:45 UTC30m
2026-07-18 N953AL - Jul 18, 16:00 UTCJul 18, 16:25 UTC25m
2026-07-18 N953AL - Jul 18, 13:30 UTCJul 18, 14:05 UTC35m
2026-07-18 N953AL - Jul 18, 07:50 UTCJul 18, 08:20 UTC30m
2026-07-18 N953AL - Jul 18, 06:45 UTCJul 18, 06:50 UTC5m
2026-07-18 N953AL - Jul 18, 05:40 UTCJul 18, 06:15 UTC35m
2026-07-18 N953AL - Jul 18, 01:50 UTCJul 18, 02:14 UTC25m
2026-07-17 N953AL - Jul 17, 22:45 UTCJul 17, 23:14 UTC30m
2026-07-15 N953AL - Jul 15, 22:00 UTCJul 15, 22:25 UTC25m
2026-07-15 N953AL - Jul 15, 19:50 UTCJul 15, 20:15 UTC25m
2026-07-15 N953AL - Jul 15, 12:45 UTCJul 15, 13:10 UTC25m
2026-07-15 N953AL - Jul 15, 11:50 UTCJul 15, 12:05 UTC15m
2026-07-15 N953AL - Jul 15, 11:00 UTCJul 15, 11:20 UTC20m
2026-07-15 N953AL - Jul 15, 04:35 UTCJul 15, 05:00 UTC25m
2026-07-15 N953AL - Jul 15, 04:00 UTCJul 15, 04:15 UTC15m
2026-07-15 N953AL - Jul 15, 03:05 UTCJul 15, 03:25 UTC20m
2026-07-13 N953AL - Jul 13, 19:55 UTCJul 13, 21:55 UTC2h 0m
2026-07-13 N953AL - Jul 13, 12:50 UTCJul 13, 13:15 UTC25m
2026-07-13 N953AL - Jul 13, 11:30 UTCJul 13, 12:40 UTC1h 10m
2026-07-13 N953AL - Jul 13, 07:01 UTCJul 13, 07:25 UTC25m
2026-07-13 N953AL - Jul 13, 05:55 UTCJul 13, 06:50 UTC55m
2026-07-13 N953AL - Jul 13, 05:05 UTCJul 13, 05:20 UTC15m
2026-07-12 N953AL - Jul 12, 12:05 UTCJul 12, 13:10 UTC1h 5m
2026-07-12 N953AL - Jul 12, 10:45 UTCJul 12, 11:20 UTC35m
2026-07-12 N953AL - Jul 12, 02:10 UTCJul 12, 02:20 UTC10m
2026-07-12 N953AL - Jul 12, 01:30 UTCJul 12, 01:40 UTC10m
2026-07-12 N953AL - Jul 12, 00:10 UTCJul 12, 00:45 UTC35m
2026-07-11 N953AL - Jul 11, 00:20 UTCJul 11, 00:55 UTC35m
2026-07-10 N953AL - Jul 10, 23:25 UTCJul 10, 23:50 UTC25m

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 N953AL page for operator, model, and routing details .

Mode-S AD3FD7 frequently asked

What is Mode-S code AD3FD7?
AD3FD7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N953AL.
Where is Mode-S AD3FD7 registered?
Mode-S code AD3FD7 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 AD3FD7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD3FD7, octal 53237727, decimal 11,354,071.
What flights does AD3FD7 operate?
Mode-S AD3FD7 has broadcast 1 distinct callsign, including N953AL.