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sensors Mode-S transponder

A144E5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N181FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A144E5
Octal
50242345
Decimal
10,568,933
Country
US
Tail
N181FE
Type
B763
No current signal · last broadcast Jul 25, 15:30 UTC
Flights observed
220
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 15:30 UTC

Last known position

Most recent position reported by Mode-S A144E5.

Country allocation

The ICAO 24-bit address A144E5 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
FDX1876 - 6 2026-07-18
FDX57 - 5 2026-07-10
FDX764 - 4 2026-07-06
FDX1468 - 4 2026-06-25
FDX1210 FedEx Express 4 2026-05-09
FDX876 FedEx Express 3 2026-05-14
FDX853 FedEx Express 3 2026-05-06
FDX644 FedEx Express 3 2026-07-22
FDX58 FedEx Express 3 2026-05-27
FDX367 FedEx Express 3 2026-05-21
FDX358 FedEx Express 3 2026-05-20
FDX258 - 3 2026-07-11
FDX1885 FedEx Express 3 2026-05-20
FDX1879 FedEx Express 3 2026-05-14
FDX1801 - 3 2026-07-17
FDX1735 FedEx Express 3 2026-07-21
FDX1728 FedEx Express 3 2026-05-13
FDX1681 FedEx Express 3 2026-05-21
FDX1455 FedEx Express 3 2026-05-29
FDX1410 FedEx Express 3 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 FDX613 ELP → MEM Jul 25, 13:50 UTCJul 25, 15:30 UTC1h 40m
2026-07-24 FDX1188 SAT → ELP Jul 24, 10:10 UTCJul 24, 10:55 UTC45m
2026-07-24 FDX1188 SAT → ELP Jul 24, 08:25 UTCJul 24, 09:10 UTC45m
2026-07-24 FDX1124 ATL → AFW Jul 24, 03:10 UTCJul 24, 04:50 UTC1h 40m
2026-07-23 FDX1774 - Jul 23, 08:40 UTCJul 23, 09:40 UTC1h 0m
2026-07-23 FDX1627 ORD → IND Jul 23, 04:15 UTCJul 23, 04:50 UTC35m
2026-07-22 FDX922 MEM → ORD Jul 22, 22:15 UTCJul 22, 23:30 UTC1h 15m
2026-07-22 FDX922 MEM → ORD Jul 22, 22:10 UTCJul 22, 23:25 UTC1h 15m
2026-07-22 FDX644 JFK → MEM Jul 22, 13:24 UTCJul 22, 15:45 UTC2h 21m
2026-07-22 FDX644 JFK → MEM Jul 22, 13:25 UTCJul 22, 15:40 UTC2h 15m
2026-07-22 FDX1601 DFW → IND Jul 22, 02:45 UTCJul 22, 04:25 UTC1h 40m
2026-07-21 FDX1735 IND → DFW Jul 21, 07:50 UTCJul 21, 09:25 UTC1h 35m
2026-07-21 FDX1611 MEM → DTW Jul 21, 02:30 UTCJul 21, 03:05 UTC35m
2026-07-19 FDX505 MEM → DTW Jul 19, 22:25 UTCJul 19, 23:50 UTC1h 25m
2026-07-18 FDX849 LAX → MEM Jul 18, 13:00 UTCJul 18, 16:15 UTC3h 15m
2026-07-18 FDX849 LAX → MEM Jul 18, 13:00 UTCJul 18, 16:18 UTC3h 18m
2026-07-18 FDX1876 OAK → LAX Jul 18, 09:35 UTCJul 18, 10:31 UTC56m
2026-07-18 FDX1876 - Jul 18, 09:35 UTCJul 18, 10:30 UTC55m
2026-07-17 FDX1801 - Jul 17, 04:35 UTCJul 17, 05:25 UTC50m
2026-07-16 FDX1508 - Jul 16, 09:10 UTCJul 16, 12:09 UTC3h 0m
2026-07-16 FDX1262 - Jul 16, 03:25 UTCJul 16, 06:05 UTC2h 40m
2026-07-15 FDX1865 - Jul 15, 09:40 UTCJul 15, 11:05 UTC1h 25m
2026-07-15 FDX1801 - Jul 15, 04:35 UTCJul 15, 05:25 UTC50m
2026-07-14 FDX326 AWM → LAX Jul 14, 20:50 UTCJul 15, 00:10 UTC3h 19m
2026-07-14 FDX446 - Jul 14, 14:05 UTCJul 14, 17:15 UTC3h 10m
2026-07-14 FDX446 LAX → MEM Jul 14, 14:01 UTCJul 14, 17:27 UTC3h 26m
2026-07-14 FDX1750 - Jul 14, 08:45 UTCJul 14, 12:15 UTC3h 30m
2026-07-14 FDX1600 EWR → IND Jul 14, 02:20 UTCJul 14, 03:45 UTC1h 25m
2026-07-14 FDX1600 EWR → IND Jul 14, 02:20 UTCJul 14, 03:50 UTC1h 30m
2026-07-12 FDX721 - Jul 12, 20:25 UTCJul 12, 22:40 UTC2h 15m
2026-07-11 FDX258 - Jul 11, 13:40 UTCJul 11, 16:45 UTC3h 5m
2026-07-10 FDX57 - Jul 10, 09:05 UTCJul 10, 11:00 UTC1h 55m
2026-07-10 FDX2361 - Jul 10, 04:50 UTCJul 10, 06:05 UTC1h 15m
2026-07-09 FDX722 - Jul 9, 22:55 UTCJul 9, 23:45 UTC50m
2026-07-09 FDX258 - Jul 9, 09:00 UTCJul 9, 21:20 UTC12h 20m
2026-07-09 FDX1358 - Jul 9, 02:30 UTCJul 9, 04:25 UTC1h 55m
2026-07-08 FDX798 MEM → MSP Jul 8, 21:55 UTCJul 8, 23:55 UTC2h 0m
2026-07-08 FDX415 - Jul 8, 12:10 UTCJul 8, 15:20 UTC3h 10m
2026-07-08 FDX1853 OAK → ONT Jul 8, 09:45 UTCJul 8, 10:35 UTC50m
2026-07-08 FDX1837 PHX → OAK Jul 8, 03:30 UTCJul 8, 05:00 UTC1h 30m
2026-07-07 FDX904 - Jul 7, 21:05 UTCJul 7, 23:45 UTC2h 40m
2026-07-07 FDX601 - Jul 7, 12:10 UTCJul 7, 13:55 UTC1h 45m
2026-07-07 FDX1400 - Jul 7, 08:50 UTCJul 7, 10:35 UTC1h 45m
2026-07-07 FDX1276 JFK → MEM Jul 7, 02:25 UTCJul 7, 04:32 UTC2h 7m
2026-07-07 FDX1276 - Jul 7, 02:25 UTCJul 7, 04:35 UTC2h 10m
2026-07-06 FDX764 BDL → JFK Jul 6, 05:35 UTCJul 6, 06:00 UTC25m
2026-07-05 FDX764 - Jul 5, 23:20 UTCJul 6, 01:25 UTC2h 5m
2026-07-05 FDX764 MEM → BDL Jul 5, 23:14 UTCJul 6, 01:27 UTC2h 13m
2026-07-05 FDX644 - Jul 5, 11:50 UTCJul 5, 13:50 UTC2h 0m
2026-07-03 FDX1483 - Jul 3, 08:30 UTCJul 3, 10:35 UTC2h 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 N181FE page for operator, model, and routing details .

Mode-S A144E5 frequently asked

What is Mode-S code A144E5?
A144E5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N181FE.
Where is Mode-S A144E5 registered?
Mode-S code A144E5 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 A144E5 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 15:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A144E5, octal 50242345, decimal 10,568,933.
What flights does A144E5 operate?
Mode-S A144E5 has broadcast 20 distinct callsigns, including FDX1876, FDX57, FDX764, FDX1468, FDX1210.