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sensors Mode-S transponder

AC911D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N909FE · CESSNA 208 Caravan · operated by FEDERAL EXPRESS CORPORATION

Hex
AC911D
Octal
53110435
Decimal
11,309,341
Country
US
Tail
N909FE
Type
C208
No current signal · last broadcast 2d ago
Flights observed
101
Distinct callsigns
20
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S AC911D.

Country allocation

The ICAO 24-bit address AC911D 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
CFS7695 - 27 2026-07-07
CFS7701 - 8 2026-07-15
CFS8695 Empire Airlines 7 2026-07-02
CFS8511 Empire Airlines 7 2026-06-30
CFS8657 - 6 2026-07-25
CFS7657 Empire Airlines 5 2026-07-24
CFS4695 - 5 2026-07-06
CFS8744 Empire Airlines 4 2026-07-16
CFS5322 Empire Airlines 4 2026-06-13
CFS44 Empire Airlines 4 2026-07-03
CFS518 - 3 2026-07-01
CFS4657 - 3 2026-07-25
CFS447 Empire Airlines 3 2026-07-03
CFS201 - 3 2026-07-16
CFS4701 - 2 2026-07-13
CFS4511 Empire Airlines 2 2026-06-12
CFS8926 - 1 2026-07-07
CFS8699 - 1 2026-07-17
CFS7699 - 1 2026-07-16
CFS7655 - 1 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CFS4657 CLM → SEA Jul 25, 16:30 UTCJul 25, 17:05 UTC35m
2026-07-25 CFS8657 - Jul 25, 15:05 UTCJul 25, 15:30 UTC25m
2026-07-24 CFS7657 CLM → SEA Jul 24, 23:55 UTCJul 25, 00:30 UTC35m
2026-07-24 CFS8657 SEA → CLM Jul 24, 15:50 UTCJul 24, 16:25 UTC35m
2026-07-23 CFS7657 CLM → SEA Jul 23, 23:55 UTCJul 24, 00:25 UTC30m
2026-07-23 CFS8657 SEA → CLM Jul 23, 15:25 UTCJul 23, 15:55 UTC30m
2026-07-22 CFS7657 CLM → SEA Jul 22, 23:50 UTCJul 23, 00:30 UTC40m
2026-07-22 CFS8657 - Jul 22, 15:50 UTCJul 22, 16:15 UTC25m
2026-07-22 CFS7657 - Jul 22, 00:00 UTCJul 22, 00:30 UTC30m
2026-07-21 CFS8657 SEA → CLM Jul 21, 16:50 UTCJul 21, 17:20 UTC30m
2026-07-20 CFS7657 - Jul 20, 23:55 UTCJul 21, 00:35 UTC40m
2026-07-20 CFS4657 SEA → CLM Jul 20, 21:50 UTCJul 20, 22:20 UTC30m
2026-07-17 CFS4699 BLI → SEA Jul 17, 16:49 UTCJul 17, 17:35 UTC45m
2026-07-17 CFS8699 SEA → BLI Jul 17, 15:10 UTCJul 17, 15:55 UTC45m
2026-07-16 CFS7699 - Jul 16, 23:59 UTCJul 17, 00:35 UTC35m
2026-07-16 CFS201 - Jul 16, 16:05 UTCJul 16, 16:55 UTC50m
2026-07-16 CFS8744 GEG → YKM Jul 16, 14:15 UTCJul 16, 14:55 UTC40m
2026-07-15 CFS7701 - Jul 15, 23:55 UTCJul 16, 00:35 UTC40m
2026-07-15 CFS7701 - Jul 15, 22:50 UTCJul 15, 23:00 UTC10m
2026-07-15 CFS8744 GEG → YKM Jul 15, 14:35 UTCJul 15, 15:25 UTC50m
2026-07-14 CFS7701 - Jul 14, 23:55 UTCJul 15, 00:35 UTC40m
2026-07-14 CFS7701 - Jul 14, 22:40 UTCJul 14, 22:50 UTC9m
2026-07-14 CFS8744 GEG → YKM Jul 14, 15:10 UTCJul 14, 15:40 UTC30m
2026-07-13 CFS7701 - Jul 13, 23:50 UTCJul 14, 00:35 UTC45m
2026-07-13 CFS4701 - Jul 13, 19:40 UTCJul 13, 20:30 UTC50m
2026-07-07 CFS7701 - Jul 7, 23:50 UTCJul 8, 00:35 UTC45m
2026-07-07 CFS7701 - Jul 7, 21:30 UTCJul 7, 21:40 UTC10m
2026-07-07 CFS202 - Jul 7, 19:40 UTCJul 7, 20:40 UTC1h 0m
2026-07-07 CFS8926 SEA → BLI Jul 7, 16:50 UTCJul 7, 17:30 UTC40m
2026-07-07 CFS7695 BLI → SEA Jul 7, 00:00 UTCJul 7, 00:45 UTC45m
2026-07-06 CFS7695 - Jul 6, 22:35 UTCJul 6, 22:45 UTC10m
2026-07-06 CFS7695 - Jul 6, 21:55 UTCJul 6, 22:05 UTC10m
2026-07-06 CFS4695 - Jul 6, 20:55 UTCJul 6, 21:25 UTC30m
2026-07-03 CFS447 SEA → BLI Jul 3, 21:45 UTCJul 3, 23:20 UTC1h 35m
2026-07-03 CFS447 SEA → BLI Jul 3, 18:00 UTCJul 3, 18:25 UTC25m
2026-07-03 CFS447 SEA → BLI Jul 3, 15:10 UTCJul 3, 16:45 UTC1h 35m
2026-07-03 CFS44 SEA → CLM Jul 3, 03:00 UTCJul 3, 03:40 UTC40m
2026-07-02 CFS44 SEA → CLM Jul 2, 23:30 UTCJul 2, 23:55 UTC25m
2026-07-02 CFS7695 - Jul 2, 21:55 UTCJul 2, 22:15 UTC20m
2026-07-02 CFS8695 SEA → FRD Jul 2, 16:45 UTCJul 2, 17:25 UTC40m
2026-07-02 CFS7695 BLI → SEA Jul 2, 00:00 UTCJul 2, 00:35 UTC35m
2026-07-01 CFS518 - Jul 1, 22:55 UTCJul 1, 23:05 UTC10m
2026-07-01 CFS518 SEA → ESD Jul 1, 16:20 UTCJul 1, 17:05 UTC45m
2026-07-01 CFS7695 - Jul 1, 00:10 UTCJul 1, 00:55 UTC45m
2026-06-30 CFS7695 - Jun 30, 22:30 UTCJun 30, 22:40 UTC10m
2026-06-30 CFS7695 - Jun 30, 21:40 UTCJun 30, 21:50 UTC10m
2026-06-30 CFS350 BLI → SEA Jun 30, 17:30 UTCJun 30, 17:55 UTC25m
2026-06-30 CFS8511 SEA → ESD Jun 30, 16:25 UTCJun 30, 16:55 UTC30m
2026-06-30 CFS7695 BLI → SEA Jun 30, 00:09 UTCJun 30, 00:49 UTC40m
2026-06-29 CFS7695 - Jun 29, 22:30 UTCJun 29, 22:39 UTC10m

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 N909FE page for operator, model, and routing details .

Mode-S AC911D frequently asked

What is Mode-S code AC911D?
AC911D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N909FE.
Where is Mode-S AC911D registered?
Mode-S code AC911D 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 AC911D 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 AC911D, octal 53110435, decimal 11,309,341.
What flights does AC911D operate?
Mode-S AC911D has broadcast 20 distinct callsigns, including CFS7695, CFS7701, CFS8695, CFS8511, CFS8657.