Apparatus

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sensors Mode-S transponder

AD4F2A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N957FE · CESSNA 208 Caravan · operated by FEDERAL EXPRESS CORPORATION

Hex
AD4F2A
Octal
53247452
Decimal
11,357,994
Country
US
Tail
N957FE
Type
C208
No current signal · last broadcast 1d ago
Flights observed
46
Distinct callsigns
17
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AD4F2A.

Country allocation

The ICAO 24-bit address AD4F2A 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 17 distinct

Callsign Airline Flights Last seen
CFS7697 Empire Airlines 10 2026-05-15
CFS8697 Empire Airlines 9 2026-05-14
CFS8655 - 7 2026-05-28
CFS7655 Empire Airlines 5 2026-04-21
CFS4697 Empire Airlines 3 2026-05-26
CFS8976 Empire Airlines 1 2026-05-27
CFS8974 Empire Airlines 1 2026-05-15
CFS8731 - 1 2026-04-18
CFS8204 Empire Airlines 1 2026-04-25
CFS7675 Empire Airlines 1 2026-05-28
CFS7664 Empire Airlines 1 2026-04-18
CFS7272 - 1 2026-05-26
CFS4976 Empire Airlines 1 2026-05-27
CFS4974 Empire Airlines 1 2026-05-15
CFS4655 Empire Airlines 1 2026-04-20
CFS4650 Empire Airlines 1 2026-04-13
CFS4204 Empire Airlines 1 2026-04-25

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-05-28 CFS7675 LMT → PDX May 28, 23:05 UTCMay 29, 00:30 UTC1h 25m
2026-05-28 CFS8655 - May 28, 14:25 UTCMay 28, 15:20 UTC55m
2026-05-27 CFS4976 OTH → PDX May 27, 21:25 UTCMay 27, 22:20 UTC55m
2026-05-27 CFS8976 PDX → OTH May 27, 15:55 UTCMay 27, 16:50 UTC55m
2026-05-26 CFS7272 RDD → SMF May 26, 23:19 UTCMay 27, 00:10 UTC50m
2026-05-26 CFS4697 SMF → RDD May 26, 21:14 UTCMay 26, 22:05 UTC50m
2026-05-15 CFS4974 OTH → PDX May 15, 20:40 UTCMay 15, 21:25 UTC45m
2026-05-15 CFS8974 PDX → OTH May 15, 18:25 UTCMay 15, 19:30 UTC1h 5m
2026-05-15 CFS7697 RDD → SMF May 15, 00:15 UTCMay 15, 01:00 UTC45m
2026-05-14 CFS8697 SMF → RDD May 14, 14:05 UTCMay 14, 14:55 UTC50m
2026-05-14 CFS7697 RDD → SMF May 14, 00:15 UTCMay 14, 01:05 UTC50m
2026-05-13 CFS8697 SMF → RDD May 13, 13:55 UTCMay 13, 14:45 UTC50m
2026-05-13 CFS7697 RDD → SMF May 13, 00:15 UTCMay 13, 01:05 UTC50m
2026-05-12 CFS8697 SMF → RDD May 12, 14:10 UTCMay 12, 14:50 UTC40m
2026-05-11 CFS4697 SMF → RDD May 11, 21:10 UTCMay 11, 21:55 UTC45m
2026-05-09 CFS7697 RDD → SMF May 9, 00:20 UTCMay 9, 01:05 UTC45m
2026-05-08 CFS8697 SMF → RDD May 8, 14:00 UTCMay 8, 14:45 UTC45m
2026-05-08 CFS7697 RDD → SMF May 8, 00:20 UTCMay 8, 01:04 UTC45m
2026-05-07 CFS8697 SMF → RDD May 7, 13:50 UTCMay 7, 14:35 UTC45m
2026-05-07 CFS7697 RDD → SMF May 7, 00:15 UTCMay 7, 01:00 UTC45m
2026-05-06 CFS8697 SMF → RDD May 6, 15:00 UTCMay 6, 15:45 UTC45m
2026-05-06 CFS7697 RDD → SMF May 6, 00:15 UTCMay 6, 01:01 UTC45m
2026-05-05 CFS8697 SMF → RDD May 5, 13:55 UTCMay 5, 15:01 UTC1h 5m
2026-05-05 CFS7697 RDD → SMF May 5, 00:10 UTCMay 5, 00:55 UTC45m
2026-05-04 CFS4697 SMF → RDD May 4, 21:15 UTCMay 4, 22:00 UTC45m
2026-04-25 CFS4204 SMF → RDD Apr 25, 16:15 UTCApr 25, 17:05 UTC50m
2026-04-25 CFS8204 SMF → RDD Apr 25, 14:50 UTCApr 25, 15:30 UTC40m
2026-04-25 CFS7697 RDD → SMF Apr 25, 00:10 UTCApr 25, 01:00 UTC50m
2026-04-24 CFS8697 SMF → RDD Apr 24, 13:50 UTCApr 24, 14:40 UTC50m
2026-04-22 CFS7697 RDD → SMF Apr 22, 00:15 UTCApr 22, 01:05 UTC50m
2026-04-21 CFS8697 SMF → RDD Apr 21, 14:10 UTCApr 21, 14:55 UTC45m
2026-04-21 CFS7655 ACV → SMF Apr 21, 00:55 UTCApr 21, 01:35 UTC40m
2026-04-20 CFS4655 GEG → PDX Apr 20, 20:50 UTCApr 20, 21:45 UTC55m
2026-04-18 CFS7664 UKI → SMF Apr 18, 23:45 UTCApr 19, 00:20 UTC35m
2026-04-18 CFS8731 - Apr 18, 15:05 UTCApr 18, 16:00 UTC55m
2026-04-17 CFS7655 ACV → SMF Apr 17, 23:55 UTCApr 18, 00:40 UTC45m
2026-04-17 CFS8655 - Apr 17, 14:00 UTCApr 17, 15:00 UTC59m
2026-04-16 CFS7655 ACV → SMF Apr 16, 23:55 UTCApr 17, 00:50 UTC55m
2026-04-16 CFS8655 - Apr 16, 14:20 UTCApr 16, 15:10 UTC50m
2026-04-16 CFS7655 ACV → SMF Apr 16, 00:00 UTCApr 16, 00:50 UTC50m
2026-04-15 CFS8655 - Apr 15, 15:05 UTCApr 15, 15:40 UTC35m
2026-04-15 CFS8655 - Apr 15, 14:35 UTCApr 15, 14:55 UTC19m
2026-04-15 CFS7655 ACV → SMF Apr 15, 00:00 UTCApr 15, 00:45 UTC45m
2026-04-14 CFS8655 - Apr 14, 14:50 UTCApr 14, 15:25 UTC35m
2026-04-14 CFS8655 - Apr 14, 14:25 UTCApr 14, 14:45 UTC20m
2026-04-13 CFS4650 SMF → UKI Apr 13, 22:15 UTCApr 13, 22:40 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 N957FE page for operator, model, and routing details .

Mode-S AD4F2A frequently asked

What is Mode-S code AD4F2A?
AD4F2A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N957FE.
Where is Mode-S AD4F2A registered?
Mode-S code AD4F2A 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 AD4F2A 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 AD4F2A, octal 53247452, decimal 11,357,994.
What flights does AD4F2A operate?
Mode-S AD4F2A has broadcast 17 distinct callsigns, including CFS7697, CFS8697, CFS8655, CFS7655, CFS4697.