Apparatus

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sensors Mode-S transponder

AD4FC1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N957MF · operated by METRO AVAITION INC

Hex
AD4FC1
Octal
53247701
Decimal
11,358,145
Country
US
Tail
N957MF
Type
EC45
No current signal · last broadcast 2d ago
Flights observed
65
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S AD4FC1.

Country allocation

The ICAO 24-bit address AD4FC1 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
N957MF - 64 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N957MF - Jul 16, 11:30 UTCJul 16, 11:40 UTC10m
2026-07-03 N957MF - Jul 3, 08:30 UTCJul 3, 09:05 UTC35m
2026-07-03 N957MF - Jul 3, 06:15 UTCJul 3, 07:50 UTC1h 35m
2026-07-02 N957MF - Jul 2, 01:30 UTCJul 2, 01:45 UTC15m
2026-07-02 N957MF - Jul 2, 00:35 UTCJul 2, 00:50 UTC15m
2026-06-26 N957MF - Jun 26, 07:30 UTCJun 26, 07:39 UTC10m
2026-06-25 N957MF - Jun 25, 07:45 UTCJun 25, 07:54 UTC10m
2026-06-25 N957MF - Jun 25, 06:30 UTCJun 25, 06:40 UTC10m
2026-06-24 N957MF - Jun 24, 20:05 UTCJun 24, 20:20 UTC15m
2026-06-24 N957MF - Jun 24, 19:10 UTCJun 24, 19:24 UTC15m
2026-06-24 - - Jun 24, 07:50 UTCJun 24, 07:59 UTC10m
2026-06-23 N957MF - Jun 23, 11:04 UTCJun 23, 11:29 UTC25m
2026-06-22 N957MF - Jun 22, 05:20 UTCJun 22, 06:00 UTC40m
2026-06-22 N957MF - Jun 22, 04:30 UTCJun 22, 04:40 UTC10m
2026-06-20 N957MF - Jun 20, 07:09 UTCJun 20, 08:09 UTC1h 0m
2026-06-20 N957MF - Jun 20, 06:14 UTCJun 20, 06:24 UTC10m
2026-06-18 N957MF - Jun 18, 16:05 UTCJun 18, 16:20 UTC15m
2026-06-14 N957MF - Jun 14, 12:50 UTCJun 14, 13:00 UTC10m
2026-06-14 N957MF - Jun 14, 11:15 UTCJun 14, 11:30 UTC15m
2026-06-10 N957MF - Jun 10, 23:20 UTCJun 11, 00:15 UTC55m
2026-06-10 N957MF - Jun 10, 19:00 UTCJun 10, 19:25 UTC25m
2026-06-10 N957MF - Jun 10, 17:05 UTCJun 10, 17:45 UTC40m
2026-06-10 N957MF - Jun 10, 02:20 UTCJun 10, 02:30 UTC10m
2026-06-09 N957MF - Jun 9, 17:50 UTCJun 9, 18:00 UTC10m
2026-06-09 N957MF - Jun 9, 16:45 UTCJun 9, 16:55 UTC10m
2026-06-07 N957MF - Jun 7, 05:05 UTCJun 7, 05:40 UTC35m
2026-06-07 N957MF - Jun 7, 03:25 UTCJun 7, 04:10 UTC45m
2026-06-06 N957MF - Jun 6, 07:20 UTCJun 6, 07:45 UTC25m
2026-06-06 N957MF - Jun 6, 05:30 UTCJun 6, 06:15 UTC45m
2026-06-04 N957MF - Jun 4, 05:30 UTCJun 4, 05:55 UTC25m
2026-06-04 N957MF - Jun 4, 04:30 UTCJun 4, 04:50 UTC20m
2026-06-03 N957MF - Jun 3, 20:20 UTCJun 3, 20:30 UTC10m
2026-06-03 N957MF - Jun 3, 19:20 UTCJun 3, 19:30 UTC10m
2026-06-02 N957MF - Jun 2, 19:40 UTCJun 2, 19:50 UTC10m
2026-06-01 N957MF - Jun 1, 01:30 UTCJun 1, 01:40 UTC10m
2026-05-28 N957MF - May 28, 00:25 UTCMay 28, 00:35 UTC10m
2026-05-27 N957MF - May 27, 23:35 UTCMay 27, 23:45 UTC10m
2026-05-27 N957MF - May 27, 15:00 UTCMay 27, 15:20 UTC20m
2026-05-21 N957MF - May 21, 03:05 UTCMay 21, 03:40 UTC35m
2026-05-21 N957MF - May 21, 01:55 UTCMay 21, 02:30 UTC35m
2026-05-17 N957MF - May 17, 04:45 UTCMay 17, 05:00 UTC15m
2026-05-17 N957MF - May 17, 02:25 UTCMay 17, 02:40 UTC15m
2026-05-12 N957MF - May 12, 23:50 UTCMay 13, 00:20 UTC30m
2026-05-12 N957MF - May 12, 23:01 UTCMay 12, 23:10 UTC10m
2026-05-11 N957MF - May 11, 13:00 UTCMay 11, 13:15 UTC15m
2026-05-11 N957MF - May 11, 10:15 UTCMay 11, 10:50 UTC35m
2026-05-11 N957MF - May 11, 04:50 UTCMay 11, 05:30 UTC40m
2026-05-10 N957MF - May 10, 00:09 UTCMay 10, 00:20 UTC10m
2026-05-08 N957MF - May 8, 08:49 UTCMay 8, 08:59 UTC10m
2026-05-08 N957MF - May 8, 07:09 UTCMay 8, 07:24 UTC15m

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 N957MF page for operator, model, and routing details .

Mode-S AD4FC1 frequently asked

What is Mode-S code AD4FC1?
AD4FC1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N957MF.
Where is Mode-S AD4FC1 registered?
Mode-S code AD4FC1 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 AD4FC1 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 AD4FC1, octal 53247701, decimal 11,358,145.
What flights does AD4FC1 operate?
Mode-S AD4FC1 has broadcast 1 distinct callsign, including N957MF.