Apparatus

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sensors Mode-S transponder

A9CF43

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N731FD · AIRBUS A-300-200 · operated by FEDERAL EXPRESS CORP

Hex
A9CF43
Octal
52347503
Decimal
11,128,643
Country
US
Tail
N731FD
Type
A30B
No current signal · last broadcast 15h ago
Flights observed
94
Distinct callsigns
20
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A9CF43.

Country allocation

The ICAO 24-bit address A9CF43 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
FDX1322 - 5 2026-07-16
FDX1245 - 5 2026-06-18
FDX1536 - 4 2026-07-15
FDX134 FedEx Express 4 2026-06-11
FDX3708 - 3 2026-04-14
FDX1682 FedEx Express 3 2026-04-24
FDX1648 FedEx Express 3 2026-04-15
FDX1630 FedEx Express 3 2026-05-08
FDX1564 - 3 2026-07-14
FDX153 FedEx Express 3 2026-04-29
FDX152 FedEx Express 3 2026-04-28
FDX1478 - 3 2026-06-20
FDX1445 - 3 2026-06-17
FDX1433 - 3 2026-06-25
FDX137 FedEx Express 3 2026-06-12
FDX1366 FedEx Express 3 2026-05-09
FDX1303 - 3 2026-06-24
FDX2338 FedEx Express 2 2026-06-26
FDX1715 FedEx Express 2 2026-04-29
FDX1709 FedEx Express 2 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 FDX1486 - Jul 17, 08:49 UTCJul 17, 09:55 UTC1h 5m
2026-07-17 FDX1257 - Jul 17, 03:25 UTCJul 17, 04:20 UTC55m
2026-07-16 FDX1479 - Jul 16, 09:10 UTCJul 16, 09:55 UTC45m
2026-07-16 FDX1322 - Jul 16, 03:05 UTCJul 16, 04:25 UTC1h 20m
2026-07-15 FDX1536 - Jul 15, 08:40 UTCJul 15, 10:00 UTC1h 20m
2026-07-15 FDX1386 - Jul 15, 01:40 UTCJul 15, 03:40 UTC2h 0m
2026-07-14 FDX1564 - Jul 14, 09:15 UTCJul 14, 11:20 UTC2h 5m
2026-06-26 FDX2338 ORF → MEM Jun 26, 01:39 UTCJun 26, 03:24 UTC1h 45m
2026-06-25 FDX1433 - Jun 25, 08:55 UTCJun 25, 10:30 UTC1h 35m
2026-06-25 FDX1433 MEM → ORF Jun 25, 08:50 UTCJun 25, 10:34 UTC1h 44m
2026-06-24 FDX1303 - Jun 24, 02:15 UTCJun 24, 04:00 UTC1h 45m
2026-06-23 FDX1571 - Jun 23, 09:20 UTCJun 23, 10:55 UTC1h 35m
2026-06-23 FDX1330 - Jun 23, 02:45 UTCJun 23, 04:00 UTC1h 15m
2026-06-20 FDX1478 - Jun 20, 12:30 UTCJun 20, 12:50 UTC20m
2026-06-20 FDX1478 - Jun 20, 09:54 UTCJun 20, 11:09 UTC1h 15m
2026-06-20 FDX1286 - Jun 20, 04:20 UTCJun 20, 04:44 UTC25m
2026-06-20 FDX1286 - Jun 20, 02:35 UTCJun 20, 03:19 UTC45m
2026-06-19 FDX1459 - Jun 19, 08:50 UTCJun 19, 10:29 UTC1h 40m
2026-06-18 FDX1245 - Jun 18, 02:55 UTCJun 18, 04:10 UTC1h 15m
2026-06-18 FDX1245 CAE → MEM Jun 18, 02:51 UTCJun 18, 04:13 UTC1h 22m
2026-06-17 FDX1445 - Jun 17, 09:00 UTCJun 17, 10:00 UTC1h 0m
2026-06-17 FDX2237 LCK → MEM Jun 17, 03:35 UTCJun 17, 05:00 UTC1h 25m
2026-06-16 FDX1486 - Jun 16, 09:10 UTCJun 16, 10:09 UTC1h 0m
2026-06-16 FDX1245 - Jun 16, 02:34 UTCJun 16, 03:50 UTC1h 15m
2026-06-16 FDX1245 CAE → MEM Jun 16, 02:34 UTCJun 16, 03:51 UTC1h 17m
2026-06-12 FDX1445 MEM → CAE Jun 12, 10:00 UTCJun 12, 11:05 UTC1h 5m
2026-06-12 FDX137 YWG → MEM Jun 12, 01:00 UTCJun 12, 03:20 UTC2h 20m
2026-06-11 FDX134 MEM → YWG Jun 11, 09:35 UTCJun 11, 11:55 UTC2h 20m
2026-06-11 FDX134 MEM → YWG Jun 11, 09:33 UTCJun 11, 11:50 UTC2h 17m
2026-06-11 FDX1268 OAK → MEM Jun 11, 01:55 UTCJun 11, 05:25 UTC3h 30m
2026-06-09 FDX568 MEM → SEA Jun 9, 20:50 UTCJun 10, 00:50 UTC4h 0m
2026-06-09 FDX1257 RSW → MEM Jun 9, 03:20 UTCJun 9, 04:10 UTC50m
2026-06-05 FDX1479 MEM → SHV Jun 5, 09:20 UTCJun 5, 10:05 UTC45m
2026-06-05 FDX1206 BOS → MEM Jun 5, 00:45 UTCJun 5, 03:05 UTC2h 20m
2026-06-04 FDX1473 MEM → BOS Jun 4, 08:40 UTCJun 4, 11:00 UTC2h 20m
2026-06-04 FDX137 YWG → MEM Jun 4, 01:05 UTCJun 4, 03:25 UTC2h 20m
2026-06-03 FDX134 MEM → YWG Jun 3, 09:35 UTCJun 3, 11:50 UTC2h 15m
2026-06-03 FDX2338 ORF → MEM Jun 3, 01:45 UTCJun 3, 03:30 UTC1h 45m
2026-06-02 FDX1433 MEM → RDU Jun 2, 09:55 UTCJun 2, 11:35 UTC1h 40m
2026-05-22 FDX1322 GRR → MEM May 22, 03:15 UTCMay 22, 04:40 UTC1h 25m
2026-05-22 FDX1322 GRR → MEM May 22, 03:15 UTCMay 22, 04:46 UTC1h 31m
2026-05-21 FDX1536 MEM → GRR May 21, 08:20 UTCMay 21, 09:35 UTC1h 15m
2026-05-21 FDX137 YWG → MEM May 21, 01:15 UTCMay 21, 03:35 UTC2h 20m
2026-05-20 FDX134 MEM → YWG May 20, 10:00 UTCMay 20, 12:25 UTC2h 25m
2026-05-20 FDX1328 ROC → MEM May 20, 01:50 UTCMay 20, 03:57 UTC2h 7m
2026-05-20 FDX1328 ROC → MEM May 20, 01:55 UTCMay 20, 04:00 UTC2h 5m
2026-05-19 FDX1528 MEM → ROC May 19, 09:20 UTCMay 19, 11:10 UTC1h 50m
2026-05-19 FDX1322 GRR → MEM May 19, 03:20 UTCMay 19, 04:55 UTC1h 35m
2026-05-15 FDX1536 MEM → GRR May 15, 09:55 UTCMay 15, 11:10 UTC1h 15m
2026-05-15 FDX1322 GRR → MEM May 15, 03:00 UTCMay 15, 04:15 UTC1h 15m

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 N731FD page for operator, model, and routing details .

Mode-S A9CF43 frequently asked

What is Mode-S code A9CF43?
A9CF43 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N731FD.
Where is Mode-S A9CF43 registered?
Mode-S code A9CF43 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 A9CF43 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9CF43, octal 52347503, decimal 11,128,643.
What flights does A9CF43 operate?
Mode-S A9CF43 has broadcast 20 distinct callsigns, including FDX1322, FDX1245, FDX1536, FDX134, FDX3708.