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sensors Mode-S transponder

A9C57C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N729FD · AIRBUS A-300-200 · operated by FEDERAL EXPRESS CORP

Hex
A9C57C
Octal
52342574
Decimal
11,126,140
Country
US
Tail
N729FD
Type
A30B
No current signal · last broadcast 13h ago
Flights observed
116
Distinct callsigns
20
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A9C57C.

Country allocation

The ICAO 24-bit address A9C57C 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
FDX1435 FedEx Express 5 2026-05-28
FDX1235 FedEx Express 5 2026-05-29
FDX1571 - 4 2026-07-09
FDX1478 - 4 2026-07-08
FDX1473 - 4 2026-07-10
FDX1345 FedEx Express 4 2026-05-05
FDX1295 - 4 2026-07-15
FDX1730 - 3 2026-07-02
FDX1286 - 3 2026-07-07
FDX1217 - 3 2026-07-04
FDX1206 - 3 2026-07-14
FDX984 FedEx Express 2 2026-07-06
FDX9045 FedEx Express 2 2026-04-27
FDX819 FedEx Express 2 2026-06-04
FDX2328 FedEx Express 2 2026-06-09
FDX1755 - 2 2026-06-30
FDX1703 - 2 2026-06-17
FDX1624 FedEx Express 2 2026-05-19
FDX1605 - 2 2026-06-18
FDX1528 FedEx Express 2 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 FDX1472 - Jul 17, 09:25 UTCJul 17, 10:25 UTC1h 0m
2026-07-15 FDX1295 - Jul 15, 02:55 UTCJul 15, 05:05 UTC2h 10m
2026-07-15 FDX1295 - Jul 15, 00:55 UTCJul 15, 02:00 UTC1h 5m
2026-07-14 FDX1495 - Jul 14, 10:00 UTCJul 14, 12:55 UTC2h 55m
2026-07-14 FDX1206 - Jul 14, 01:00 UTCJul 14, 03:30 UTC2h 30m
2026-07-10 FDX1473 - Jul 10, 08:50 UTCJul 10, 11:10 UTC2h 20m
2026-07-10 FDX1473 MEM → BOS Jul 10, 08:48 UTCJul 10, 11:05 UTC2h 17m
2026-07-10 FDX1303 - Jul 10, 02:05 UTCJul 10, 03:55 UTC1h 50m
2026-07-09 FDX1571 - Jul 9, 09:15 UTCJul 9, 10:50 UTC1h 35m
2026-07-09 FDX1571 MEM → MDT Jul 9, 09:10 UTCJul 9, 10:49 UTC1h 39m
2026-07-09 FDX1330 - Jul 9, 02:15 UTCJul 9, 03:30 UTC1h 15m
2026-07-08 FDX1478 - Jul 8, 10:10 UTCJul 8, 11:25 UTC1h 15m
2026-07-07 FDX1286 - Jul 7, 02:55 UTCJul 7, 04:15 UTC1h 20m
2026-07-06 FDX1286 - Jul 6, 05:05 UTCJul 7, 04:15 UTC23h 10m
2026-07-06 FDX984 MEM → GRR Jul 6, 04:10 UTCJul 7, 03:00 UTC22h 50m
2026-07-05 FDX984 MEM → GRR Jul 5, 23:40 UTCJul 6, 02:20 UTC2h 40m
2026-07-04 FDX1217 - Jul 4, 02:30 UTCJul 4, 04:10 UTC1h 40m
2026-07-03 FDX1482 - Jul 3, 08:45 UTCJul 3, 10:30 UTC1h 45m
2026-07-03 FDX1217 BWI → MEM Jul 3, 02:30 UTCJul 3, 04:25 UTC1h 55m
2026-07-02 FDX1730 IND → BWI Jul 2, 08:37 UTCJul 2, 09:50 UTC1h 13m
2026-07-02 FDX1730 IND → BWI Jul 2, 08:40 UTCJul 2, 10:00 UTC1h 20m
2026-07-01 FDX2679 IAD → IND Jul 1, 03:15 UTCJul 1, 04:25 UTC1h 10m
2026-06-30 FDX1755 IND → IAD Jun 30, 09:15 UTCJun 30, 10:20 UTC1h 5m
2026-06-30 FDX1755 IND → IAD Jun 30, 09:15 UTCJun 30, 10:30 UTC1h 15m
2026-06-30 FDX1647 ABE → IND Jun 30, 02:30 UTCJun 30, 03:50 UTC1h 20m
2026-06-26 FDX1497 - Jun 26, 08:50 UTCJun 26, 10:39 UTC1h 50m
2026-06-25 FDX1350 - Jun 25, 02:25 UTCJun 25, 03:04 UTC40m
2026-06-25 FDX1350 BFM → MEM Jun 25, 02:20 UTCJun 25, 03:09 UTC49m
2026-06-24 FDX1526 - Jun 24, 08:55 UTCJun 24, 09:39 UTC45m
2026-06-24 FDX1217 - Jun 24, 02:20 UTCJun 24, 04:10 UTC1h 50m
2026-06-23 FDX1730 - Jun 23, 08:50 UTCJun 23, 10:04 UTC1h 15m
2026-06-23 FDX1661 SLC → IND Jun 23, 02:20 UTCJun 23, 04:55 UTC2h 35m
2026-06-19 FDX1770 - Jun 19, 08:14 UTCJun 19, 11:24 UTC3h 10m
2026-06-19 FDX153 YMX → IND Jun 19, 02:14 UTCJun 19, 04:25 UTC2h 10m
2026-06-18 FDX152 - Jun 18, 09:00 UTCJun 18, 10:20 UTC1h 20m
2026-06-18 FDX1605 - Jun 18, 02:05 UTCJun 18, 03:25 UTC1h 20m
2026-06-17 FDX1703 - Jun 17, 07:30 UTCJun 17, 08:30 UTC1h 0m
2026-06-16 FDX3608 DEN → IND Jun 16, 13:04 UTCJun 16, 14:55 UTC1h 50m
2026-06-16 FDX1162 AFW → DEN Jun 16, 08:35 UTCJun 16, 10:09 UTC1h 35m
2026-06-16 FDX1105 - Jun 16, 03:55 UTCJun 16, 04:45 UTC50m
2026-06-16 FDX1105 - Jun 16, 01:25 UTCJun 16, 02:09 UTC45m
2026-06-12 FDX1517 MEM → LRD Jun 12, 10:55 UTCJun 12, 12:30 UTC1h 35m
2026-06-12 FDX1286 LCK → MEM Jun 12, 02:35 UTCJun 12, 04:00 UTC1h 25m
2026-06-11 FDX1459 MEM → LBB Jun 11, 09:20 UTCJun 11, 10:45 UTC1h 25m
2026-06-11 FDX1295 CPR → MEM Jun 11, 02:55 UTCJun 11, 05:10 UTC2h 15m
2026-06-11 FDX1295 CPR → MEM Jun 11, 01:00 UTCJun 11, 01:55 UTC55m
2026-06-10 FDX1495 MEM → BOI Jun 10, 09:35 UTCJun 10, 12:55 UTC3h 20m
2026-06-09 FDX2328 ROC → IND Jun 9, 04:05 UTCJun 9, 05:00 UTC55m
2026-06-09 FDX2328 ROC → IND Jun 9, 01:40 UTCJun 9, 02:45 UTC1h 5m
2026-06-06 FDX1528 MEM → ROC Jun 6, 08:35 UTCJun 6, 10:14 UTC1h 40m

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 N729FD page for operator, model, and routing details .

Mode-S A9C57C frequently asked

What is Mode-S code A9C57C?
A9C57C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N729FD.
Where is Mode-S A9C57C registered?
Mode-S code A9C57C 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 A9C57C broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9C57C, octal 52342574, decimal 11,126,140.
What flights does A9C57C operate?
Mode-S A9C57C has broadcast 20 distinct callsigns, including FDX1435, FDX1235, FDX1571, FDX1478, FDX1473.