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
Broadcasting now · callsign FDX1449 · 35,025 ft
Flights observed
129
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Current position

A104C3 is currently broadcasting. Map zoomed to live position.

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
FDX1243 - 4 2026-07-02
FDX851 FedEx Express 3 2026-05-23
FDX3604 FedEx Express 3 2026-06-09
FDX1839 FedEx Express 3 2026-05-16
FDX1729 - 3 2026-07-01
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
FDX3884 - 2 2026-06-18
FDX254 - 2 2026-07-07
FDX253 - 2 2026-07-07
FDX2283 FedEx Express 2 2026-06-10
FDX192 FedEx Express 2 2026-05-17
FDX1876 - 2 2026-07-03
FDX1774 - 2 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-03 FDX1876 OAK → LAX Jul 3, 09:07 UTCJul 3, 09:55 UTC48m
2026-07-03 FDX1876 OAK → LAX Jul 3, 09:10 UTCJul 3, 10:00 UTC50m
2026-07-02 FDX568 - Jul 2, 20:30 UTCJul 3, 00:10 UTC3h 40m
2026-07-02 FDX612 - Jul 2, 12:00 UTCJul 2, 13:25 UTC1h 25m
2026-07-02 FDX1410 - Jul 2, 08:50 UTCJul 2, 10:15 UTC1h 25m
2026-07-02 FDX1243 - Jul 2, 02:30 UTCJul 2, 03:35 UTC1h 5m
2026-07-01 FDX1729 - Jul 1, 08:30 UTCJul 1, 09:25 UTC55m
2026-07-01 FDX1625 - Jul 1, 02:05 UTCJul 1, 04:40 UTC2h 35m
2026-06-30 FDX1188 - Jun 30, 10:30 UTCJun 30, 11:35 UTC1h 5m
2026-06-30 FDX1188 - Jun 30, 08:35 UTCJun 30, 09:20 UTC45m
2026-06-30 FDX1188 AFW → SAT Jun 30, 08:34 UTCJun 30, 09:15 UTC41m
2026-06-30 FDX1124 ATL → AFW Jun 30, 03:20 UTCJun 30, 05:00 UTC1h 40m
2026-06-26 FDX1774 IND → ATL Jun 26, 08:54 UTCJun 26, 09:55 UTC1h 1m
2026-06-26 FDX1774 IND → ATL Jun 26, 08:54 UTCJun 26, 09:59 UTC1h 5m
2026-06-26 FDX1625 - Jun 26, 01:54 UTCJun 26, 04:30 UTC2h 35m
2026-06-25 FDX1188 - Jun 25, 09:59 UTCJun 25, 11:04 UTC1h 5m
2026-06-25 FDX1188 - Jun 25, 08:24 UTCJun 25, 09:05 UTC40m
2026-06-25 FDX1124 ATL → AFW Jun 25, 03:24 UTCJun 25, 05:00 UTC1h 35m
2026-06-24 FDX1421 - Jun 24, 08:30 UTCJun 24, 09:19 UTC50m
2026-06-24 FDX1243 - Jun 24, 02:40 UTCJun 24, 03:44 UTC1h 5m
2026-06-23 FDX1729 - Jun 23, 08:39 UTCJun 23, 09:40 UTC1h 0m
2026-06-23 FDX1603 ATL → IND Jun 23, 03:45 UTCJun 23, 04:45 UTC1h 0m
2026-06-20 FDX1421 - Jun 20, 09:05 UTCJun 20, 09:54 UTC50m
2026-06-20 FDX1230 - Jun 20, 01:55 UTCJun 20, 04:20 UTC2h 25m
2026-06-19 FDX1879 OAK → SLC Jun 19, 09:40 UTCJun 19, 10:50 UTC1h 10m
2026-06-19 FDX1838 SEA → OAK Jun 19, 03:44 UTCJun 19, 05:30 UTC1h 45m
2026-06-18 FDX3884 OAK → SEA Jun 18, 21:50 UTCJun 18, 23:20 UTC1h 30m
2026-06-17 FDX1806 DFW → OAK Jun 17, 04:40 UTCJun 17, 07:35 UTC2h 55m
2026-06-16 FDX1471 MEM → DFW Jun 16, 08:05 UTCJun 16, 09:10 UTC1h 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?
Yes. Mode-S A104C3 is currently airborne.
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, FDX1243, FDX851, FDX3604, FDX1839.