Apparatus

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sensors Mode-S transponder

A9E956

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N738FX · CESSNA 408 SkyCourier · operated by FEDERAL EXPRESS CORP

Hex
A9E956
Octal
52364526
Decimal
11,135,318
Country
US
Tail
N738FX
Type
C408
No current signal · last broadcast Jul 25, 00:35 UTC
Flights observed
153
Distinct callsigns
15
Country
US
Last broadcast
Jul 25, 00:35 UTC

Last known position

Most recent position reported by Mode-S A9E956.

Country allocation

The ICAO 24-bit address A9E956 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 15 distinct

Callsign Airline Flights Last seen
CFS7658 - 35 2026-07-04
CFS7255 Empire Airlines 25 2026-07-23
CFS8658 - 24 2026-07-03
CFS8204 Empire Airlines 23 2026-07-23
CFS8731 - 10 2026-07-14
CFS4731 - 10 2026-07-14
CFS7204 - 9 2026-07-14
CFS4204 - 6 2026-07-18
CFS4255 Empire Airlines 4 2026-07-20
CFS7744 Empire Airlines 2 2026-07-25
CFS8737 Empire Airlines 1 2026-07-24
CFS7697 Empire Airlines 1 2026-05-27
CFS205 Empire Airlines 1 2026-07-23
CFS202 Empire Airlines 1 2026-04-21
CFS200 Empire Airlines 1 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CFS7744 YKM → GEG Jul 25, 00:10 UTCJul 25, 00:35 UTC25m
2026-07-24 CFS8737 GEG → YKM Jul 24, 14:25 UTCJul 24, 15:10 UTC45m
2026-07-23 CFS7744 YKM → GEG Jul 23, 23:55 UTCJul 24, 00:30 UTC35m
2026-07-23 CFS205 AFW → FSD Jul 23, 16:30 UTCJul 23, 18:05 UTC1h 35m
2026-07-23 CFS8204 SMF → RDD Jul 23, 15:00 UTCJul 23, 15:40 UTC40m
2026-07-23 CFS7255 RDD → SMF Jul 23, 01:25 UTCJul 23, 02:05 UTC40m
2026-07-22 CFS8204 SMF → RDD Jul 22, 16:00 UTCJul 22, 16:35 UTC35m
2026-07-22 CFS7255 RDD → SMF Jul 22, 01:15 UTCJul 22, 01:55 UTC40m
2026-07-21 CFS8204 SMF → RDD Jul 21, 15:55 UTCJul 21, 16:35 UTC40m
2026-07-21 CFS7255 RDD → SMF Jul 21, 01:30 UTCJul 21, 02:05 UTC35m
2026-07-20 CFS4255 SMF → RDD Jul 20, 22:50 UTCJul 20, 23:30 UTC40m
2026-07-18 CFS4204 - Jul 18, 16:10 UTCJul 18, 17:00 UTC50m
2026-07-18 CFS8204 SMF → RDD Jul 18, 14:40 UTCJul 18, 15:20 UTC40m
2026-07-18 CFS7255 - Jul 18, 01:30 UTCJul 18, 02:05 UTC35m
2026-07-17 CFS8204 SMF → RDD Jul 17, 14:20 UTCJul 17, 15:00 UTC40m
2026-07-17 CFS7255 RDD → SMF Jul 17, 01:29 UTCJul 17, 02:05 UTC35m
2026-07-16 CFS8204 SMF → RDD Jul 16, 15:19 UTCJul 16, 15:55 UTC35m
2026-07-16 CFS7255 RDD → SMF Jul 16, 01:25 UTCJul 16, 02:05 UTC40m
2026-07-15 CFS8204 SMF → RDD Jul 15, 16:25 UTCJul 15, 17:05 UTC40m
2026-07-14 CFS7204 - Jul 14, 23:20 UTCJul 14, 23:55 UTC35m
2026-07-14 CFS4731 - Jul 14, 21:55 UTCJul 14, 22:10 UTC15m
2026-07-14 CFS8731 - Jul 14, 15:15 UTCJul 14, 16:00 UTC45m
2026-07-13 CFS7204 RDD → SMF Jul 13, 23:20 UTCJul 13, 23:55 UTC35m
2026-07-13 CFS4204 SMF → RDD Jul 13, 20:55 UTCJul 13, 21:35 UTC40m
2026-07-11 CFS7255 RDD → SMF Jul 11, 01:20 UTCJul 11, 02:00 UTC40m
2026-07-10 CFS8204 SMF → RDD Jul 10, 16:00 UTCJul 10, 16:35 UTC35m
2026-07-10 CFS7255 - Jul 10, 01:30 UTCJul 10, 02:05 UTC35m
2026-07-09 CFS8204 SMF → RDD Jul 9, 16:55 UTCJul 9, 17:35 UTC40m
2026-07-09 CFS7255 RDD → SMF Jul 9, 01:25 UTCJul 9, 02:00 UTC35m
2026-07-08 CFS8204 SMF → RDD Jul 8, 16:30 UTCJul 8, 17:10 UTC40m
2026-07-08 CFS7255 - Jul 8, 01:30 UTCJul 8, 02:10 UTC40m
2026-07-07 CFS8204 SMF → RDD Jul 7, 16:15 UTCJul 7, 16:50 UTC35m
2026-07-06 CFS7204 RDD → SMF Jul 6, 23:15 UTCJul 6, 23:55 UTC40m
2026-07-06 CFS4204 SMF → RDD Jul 6, 21:10 UTCJul 6, 21:50 UTC40m
2026-07-04 CFS7658 - Jul 4, 00:30 UTCJul 4, 00:55 UTC25m
2026-07-03 CFS7658 - Jul 3, 23:10 UTCJul 3, 23:40 UTC30m
2026-07-03 CFS8658 - Jul 3, 19:30 UTCJul 3, 19:45 UTC15m
2026-07-03 CFS8658 - Jul 3, 17:25 UTCJul 3, 17:40 UTC15m
2026-07-03 CFS8658 - Jul 3, 14:55 UTCJul 3, 15:40 UTC45m
2026-07-02 CFS7658 - Jul 2, 23:40 UTCJul 3, 01:00 UTC1h 20m
2026-07-02 CFS8658 - Jul 2, 15:10 UTCJul 2, 15:55 UTC45m
2026-07-01 CFS7658 - Jul 1, 23:40 UTCJul 2, 01:00 UTC1h 20m
2026-07-01 CFS8658 - Jul 1, 15:45 UTCJul 1, 16:30 UTC45m
2026-07-01 CFS7658 - Jul 1, 01:00 UTCJul 1, 01:50 UTC50m
2026-06-30 CFS8658 - Jun 30, 15:40 UTCJun 30, 16:15 UTC35m
2026-06-30 CFS7658 - Jun 30, 00:35 UTCJun 30, 01:00 UTC25m
2026-06-29 CFS7658 - Jun 29, 23:29 UTCJun 29, 23:54 UTC25m
2026-06-29 CFS8658 - Jun 29, 13:24 UTCJun 29, 14:04 UTC40m
2026-06-27 CFS7658 - Jun 27, 00:39 UTCJun 27, 01:00 UTC20m
2026-06-26 CFS7658 - Jun 26, 23:39 UTCJun 27, 00:05 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 N738FX page for operator, model, and routing details .

Mode-S A9E956 frequently asked

What is Mode-S code A9E956?
A9E956 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N738FX.
Where is Mode-S A9E956 registered?
Mode-S code A9E956 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 A9E956 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 00:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9E956, octal 52364526, decimal 11,135,318.
What flights does A9E956 operate?
Mode-S A9E956 has broadcast 15 distinct callsigns, including CFS7658, CFS7255, CFS8658, CFS8204, CFS8731.