Apparatus

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sensors Mode-S transponder

A104C3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N165FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A104C3
Octal
50202303
Decimal
10,552,515
Country
US
Tail
N165FE
Type
B763
No current signal · last broadcast Jul 24, 09:40 UTC
Flights observed
158
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 09:40 UTC

Last known position

Most recent position reported by Mode-S A104C3.

Country allocation

The ICAO 24-bit address A104C3 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
FDX1188 - 5 2026-06-30
FDX3604 FedEx Express 4 2026-07-22
FDX1803 FedEx Express 4 2026-07-23
FDX1243 - 4 2026-07-02
FDX851 FedEx Express 3 2026-05-23
FDX1839 FedEx Express 3 2026-05-16
FDX1729 - 3 2026-07-01
FDX922 - 2 2026-07-15
FDX68 FedEx Express 2 2026-06-05
FDX67 FedEx Express 2 2026-06-06
FDX619 - 2 2026-07-12
FDX5986 - 2 2026-07-05
FDX57 - 2 2026-07-12
FDX53 - 2 2026-07-07
FDX529 FedEx Express 2 2026-05-31
FDX436 FedEx Express 2 2026-07-21
FDX3901 - 2 2026-07-16
FDX3884 - 2 2026-06-18
FDX254 - 2 2026-07-07
FDX253 - 2 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 FDX1446 MEM → PIT Jul 24, 08:20 UTCJul 24, 09:40 UTC1h 20m
2026-07-24 FDX1290 RNO → MEM Jul 24, 02:05 UTCJul 24, 05:25 UTC3h 20m
2026-07-23 FDX1874 OAK → LAS Jul 23, 12:10 UTCJul 23, 12:55 UTC45m
2026-07-23 FDX1874 OAK → LAS Jul 23, 09:50 UTCJul 23, 10:50 UTC1h 0m
2026-07-23 FDX1803 ONT → OAK Jul 23, 04:40 UTCJul 23, 05:30 UTC50m
2026-07-22 FDX3734 IND → ONT Jul 22, 20:20 UTCJul 23, 00:00 UTC3h 40m
2026-07-22 FDX3604 PDX → IND Jul 22, 14:00 UTCJul 22, 17:25 UTC3h 25m
2026-07-22 FDX1857 OAK → PDX Jul 22, 11:25 UTCJul 22, 11:35 UTC10m
2026-07-22 FDX1803 ONT → OAK Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 FDX1803 ONT → OAK Jul 22, 05:06 UTCJul 22, 05:57 UTC51m
2026-07-21 FDX944 MEM → LAX Jul 21, 20:10 UTCJul 21, 23:15 UTC3h 5m
2026-07-21 FDX436 ATW → MKE Jul 21, 13:10 UTCJul 21, 14:15 UTC1h 5m
2026-07-21 FDX436 ATW → MKE Jul 21, 13:05 UTCJul 21, 14:11 UTC1h 6m
2026-07-21 FDX1475 MEM → OMA Jul 21, 09:40 UTCJul 21, 10:50 UTC1h 10m
2026-07-21 FDX1207 SJC → MEM Jul 21, 02:05 UTCJul 21, 05:40 UTC3h 35m
2026-07-20 FDX1207 SJC → MEM Jul 20, 23:35 UTCJul 20, 23:55 UTC20m
2026-07-17 FDX1705 IND → OAK Jul 17, 08:00 UTCJul 17, 11:46 UTC3h 46m
2026-07-17 FDX1705 IND → OAK Jul 17, 08:00 UTCJul 17, 11:55 UTC3h 55m
2026-07-17 FDX1600 EWR → IND Jul 17, 02:34 UTCJul 17, 04:04 UTC1h 30m
2026-07-16 FDX3901 LAX → EWR Jul 16, 14:05 UTCJul 16, 18:50 UTC4h 45m
2026-07-16 FDX3901 LAX → EWR Jul 16, 14:04 UTCJul 16, 18:46 UTC4h 42m
2026-07-16 FDX1151 - Jul 16, 08:25 UTCJul 16, 10:50 UTC2h 25m
2026-07-16 FDX1107 ORD → AFW Jul 16, 04:10 UTCJul 16, 05:50 UTC1h 40m
2026-07-15 FDX922 - Jul 15, 22:10 UTCJul 15, 22:45 UTC35m
2026-07-15 FDX922 MEM → ORD Jul 15, 22:07 UTCJul 15, 23:20 UTC1h 13m
2026-07-15 FDX419 - Jul 15, 13:50 UTCJul 15, 17:00 UTC3h 10m
2026-07-15 FDX1438 - Jul 15, 08:30 UTCJul 15, 11:30 UTC3h 0m
2026-07-15 FDX1249 - Jul 15, 01:45 UTCJul 15, 03:05 UTC1h 20m
2026-07-14 FDX1449 - Jul 14, 09:15 UTCJul 14, 10:30 UTC1h 15m
2026-07-14 FDX58 - Jul 14, 03:35 UTCJul 14, 05:25 UTC1h 50m
2026-07-12 FDX57 - Jul 12, 22:20 UTCJul 13, 00:15 UTC1h 55m
2026-07-12 FDX57 MEM → BQN Jul 12, 22:18 UTCJul 13, 01:58 UTC3h 40m
2026-07-12 FDX619 - Jul 12, 11:40 UTCJul 12, 13:35 UTC1h 55m
2026-07-12 FDX619 MIA → MEM Jul 12, 11:36 UTCJul 12, 13:35 UTC1h 59m
2026-07-11 FDX1461 - Jul 11, 08:35 UTCJul 11, 10:25 UTC1h 50m
2026-07-11 FDX1240 - Jul 11, 02:15 UTCJul 11, 05:10 UTC2h 55m
2026-07-10 FDX1440 - Jul 10, 09:25 UTCJul 10, 12:15 UTC2h 50m
2026-07-10 FDX2200 - Jul 10, 02:45 UTCJul 10, 04:35 UTC1h 50m
2026-07-09 FDX398 - Jul 9, 22:20 UTCJul 10, 00:20 UTC2h 0m
2026-07-09 FDX1221 ATL → MEM Jul 9, 02:05 UTCJul 9, 02:55 UTC50m
2026-07-08 FDX1463 - Jul 8, 08:40 UTCJul 8, 09:30 UTC50m
2026-07-08 FDX54 - Jul 8, 02:35 UTCJul 8, 05:10 UTC2h 35m
2026-07-07 FDX253 - Jul 7, 20:10 UTCJul 7, 22:00 UTC1h 50m
2026-07-07 FDX253 MEM → GDL Jul 7, 20:05 UTCJul 7, 22:40 UTC2h 35m
2026-07-07 FDX254 - Jul 7, 14:20 UTCJul 7, 16:45 UTC2h 25m
2026-07-07 FDX53 - Jul 7, 09:55 UTCJul 7, 12:05 UTC2h 10m
2026-07-05 FDX5986 ANC → MEM Jul 5, 02:31 UTCJul 5, 08:28 UTC5h 57m
2026-07-05 FDX5986 - Jul 5, 02:35 UTCJul 5, 04:45 UTC2h 10m
2026-07-04 FDX157 - Jul 4, 09:25 UTCJul 4, 16:05 UTC6h 40m
2026-07-03 FDX855 - Jul 3, 12:55 UTCJul 3, 16:00 UTC3h 5m

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 N165FE page for operator, model, and routing details .

Mode-S A104C3 frequently asked

What is Mode-S code A104C3?
A104C3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N165FE.
Where is Mode-S A104C3 registered?
Mode-S code A104C3 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 A104C3 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 09:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A104C3, octal 50202303, decimal 10,552,515.
What flights does A104C3 operate?
Mode-S A104C3 has broadcast 20 distinct callsigns, including FDX1188, FDX3604, FDX1803, FDX1243, FDX851.