Apparatus

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sensors Mode-S transponder

AC01FD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N873FE · CESSNA 208 Caravan · operated by FEDERAL EXPRESS CORPORATION

Hex
AC01FD
Octal
53000775
Decimal
11,272,701
Country
US
Tail
N873FE
Type
C208
No current signal · last broadcast 9d ago
Flights observed
135
Distinct callsigns
20
Country
US
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S AC01FD.

Country allocation

The ICAO 24-bit address AC01FD 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 20 distinct

Callsign Airline Flights Last seen
CFS7697 - 14 2026-06-23
CFS8697 Empire Airlines 11 2026-06-19
CFS7655 Empire Airlines 11 2026-05-27
CFS8655 Empire Airlines 9 2026-06-23
CFS4662 Empire Airlines 9 2026-06-29
CFS7692 - 8 2026-07-08
CFS7686 Empire Airlines 8 2026-04-18
CFS7662 - 8 2026-06-29
CFS8692 Empire Airlines 7 2026-05-06
CFS8675 Empire Airlines 6 2026-05-12
CFS8667 - 6 2026-07-08
CFS4692 Empire Airlines 4 2026-05-11
CFS8686 - 3 2026-04-17
CFS8204 - 3 2026-06-20
CFS7675 - 3 2026-06-23
CFS4697 Empire Airlines 3 2026-06-22
CFS4204 - 3 2026-06-20
CFS8731 Empire Airlines 2 2026-05-23
CFS7664 Empire Airlines 2 2026-05-23
CFS202 - 2 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 CFS7692 - Jul 8, 23:25 UTCJul 9, 00:15 UTC50m
2026-07-08 CFS8667 PDX → RDM Jul 8, 14:45 UTCJul 8, 15:25 UTC40m
2026-07-07 CFS4975 - Jul 7, 17:50 UTCJul 7, 19:05 UTC1h 15m
2026-07-07 CFS8975 - Jul 7, 15:25 UTCJul 7, 16:40 UTC1h 15m
2026-06-30 CFS7692 - Jun 30, 23:25 UTCJul 1, 00:15 UTC50m
2026-06-30 CFS8667 PDX → RDM Jun 30, 15:20 UTCJun 30, 16:05 UTC45m
2026-06-29 CFS7662 EUG → PDX Jun 29, 23:49 UTCJun 30, 00:30 UTC40m
2026-06-29 CFS4662 PDX → EUG Jun 29, 20:09 UTCJun 29, 20:59 UTC50m
2026-06-27 CFS4971 - Jun 27, 17:34 UTCJun 27, 19:00 UTC1h 25m
2026-06-27 CFS8971 PDX → MFR Jun 27, 15:05 UTCJun 27, 16:20 UTC1h 15m
2026-06-26 CFS7692 RDM → PDX Jun 26, 23:19 UTCJun 27, 00:10 UTC50m
2026-06-26 CFS8667 - Jun 26, 14:59 UTCJun 26, 15:39 UTC40m
2026-06-25 CFS7692 - Jun 25, 23:30 UTCJun 26, 00:20 UTC50m
2026-06-25 CFS8667 PDX → RDM Jun 25, 14:50 UTCJun 25, 15:34 UTC45m
2026-06-24 CFS7692 - Jun 24, 23:29 UTCJun 25, 00:14 UTC45m
2026-06-24 CFS8667 PDX → RDM Jun 24, 14:45 UTCJun 24, 15:35 UTC50m
2026-06-23 CFS7675 - Jun 23, 22:49 UTCJun 23, 23:59 UTC1h 10m
2026-06-23 CFS202 - Jun 23, 21:14 UTCJun 23, 21:34 UTC20m
2026-06-23 CFS8655 SMF → ACV Jun 23, 14:59 UTCJun 23, 15:55 UTC55m
2026-06-23 CFS7697 RDD → SMF Jun 23, 00:15 UTCJun 23, 01:04 UTC50m
2026-06-22 CFS4697 SMF → RDD Jun 22, 21:30 UTCJun 22, 22:19 UTC50m
2026-06-20 CFS4204 RDD → SMF Jun 20, 17:04 UTCJun 20, 17:54 UTC50m
2026-06-20 CFS8204 SMF → RDD Jun 20, 15:29 UTCJun 20, 16:14 UTC45m
2026-06-20 CFS7697 RDD → SMF Jun 20, 00:14 UTCJun 20, 01:09 UTC55m
2026-06-19 CFS8697 SMF → RDD Jun 19, 13:54 UTCJun 19, 14:44 UTC50m
2026-06-19 CFS7697 RDD → SMF Jun 19, 00:14 UTCJun 19, 01:04 UTC50m
2026-06-18 CFS8697 SMF → RDD Jun 18, 14:01 UTCJun 18, 14:50 UTC50m
2026-06-18 CFS7697 RDD → SMF Jun 18, 00:15 UTCJun 18, 01:05 UTC50m
2026-06-17 CFS8697 SMF → RDD Jun 17, 14:00 UTCJun 17, 14:45 UTC45m
2026-06-17 CFS7697 RDD → SMF Jun 17, 00:15 UTCJun 17, 01:05 UTC50m
2026-06-16 CFS8697 SMF → RDD Jun 16, 13:55 UTCJun 16, 14:45 UTC50m
2026-06-16 CFS7697 - Jun 16, 00:15 UTCJun 16, 01:04 UTC50m
2026-06-15 CFS4697 SMF → RDD Jun 15, 21:40 UTCJun 15, 22:30 UTC50m
2026-06-13 CFS4204 SMF → RDD Jun 13, 17:15 UTCJun 13, 18:00 UTC45m
2026-06-13 CFS8204 SMF → RDD Jun 13, 15:40 UTCJun 13, 16:30 UTC50m
2026-06-13 CFS7697 RDD → SMF Jun 13, 00:10 UTCJun 13, 00:55 UTC45m
2026-06-12 CFS8697 SMF → RDD Jun 12, 14:05 UTCJun 12, 14:55 UTC50m
2026-06-12 CFS7697 RDD → SMF Jun 12, 00:10 UTCJun 12, 01:00 UTC51m
2026-06-11 CFS8697 SMF → RDD Jun 11, 14:10 UTCJun 11, 15:00 UTC50m
2026-06-11 CFS7697 RDD → SMF Jun 11, 00:10 UTCJun 11, 01:00 UTC50m
2026-06-10 CFS8697 SMF → RDD Jun 10, 14:05 UTCJun 10, 14:55 UTC50m
2026-06-10 CFS7697 RDD → SMF Jun 10, 00:10 UTCJun 10, 01:00 UTC50m
2026-06-09 CFS8697 SMF → RDD Jun 9, 14:20 UTCJun 9, 15:05 UTC45m
2026-06-09 CFS7697 RDD → SMF Jun 9, 00:10 UTCJun 9, 01:00 UTC50m
2026-06-08 CFS4697 SMF → RDD Jun 8, 21:35 UTCJun 8, 22:20 UTC45m
2026-06-06 CFS4204 SMF → RDD Jun 6, 16:30 UTCJun 6, 17:15 UTC45m
2026-06-06 CFS8204 SMF → RDD Jun 6, 15:05 UTCJun 6, 15:54 UTC50m
2026-06-06 CFS7697 RDD → SMF Jun 6, 00:20 UTCJun 6, 01:05 UTC45m
2026-06-05 CFS8697 SMF → RDD Jun 5, 13:45 UTCJun 5, 14:35 UTC50m
2026-06-05 CFS7697 RDD → SMF Jun 5, 00:15 UTCJun 5, 01:05 UTC50m

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 N873FE page for operator, model, and routing details .

Mode-S AC01FD frequently asked

What is Mode-S code AC01FD?
AC01FD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N873FE.
Where is Mode-S AC01FD registered?
Mode-S code AC01FD 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 AC01FD broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC01FD, octal 53000775, decimal 11,272,701.
What flights does AC01FD operate?
Mode-S AC01FD has broadcast 20 distinct callsigns, including CFS7697, CFS8697, CFS7655, CFS8655, CFS4662.