Apparatus

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sensors Mode-S transponder

A2AAB5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N271FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A2AAB5
Octal
50525265
Decimal
10,660,533
Country
US
Tail
N271FE
Type
B763
No current signal · last broadcast 1d ago
Flights observed
43
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A2AAB5.

Country allocation

The ICAO 24-bit address A2AAB5 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
FDX382 FedEx Express 3 2026-04-15
FDX1750 FedEx Express 3 2026-04-16
FDX9129 - 2 2026-05-20
FDX876 FedEx Express 2 2026-04-15
FDX825 - 2 2026-04-14
FDX361 FedEx Express 2 2026-04-15
FDX1869 FedEx Express 2 2026-05-29
FDX1807 FedEx Express 2 2026-04-15
FDX1771 FedEx Express 2 2026-04-14
FDX1738 FedEx Express 2 2026-05-28
FDX1631 FedEx Express 2 2026-04-16
FDX1299 FedEx Express 2 2026-05-23
FDX1151 FedEx Express 2 2026-04-17
FDX1100 FedEx Express 2 2026-04-17
FDX9131 FedEx Express 1 2026-05-21
FDX9130 FedEx Express 1 2026-04-20
FDX815 FedEx Express 1 2026-04-18
FDX568 FedEx Express 1 2026-05-28
FDX540 FedEx Express 1 2026-05-21
FDX476 FedEx Express 1 2026-05-28

Recent flights last 43

DateFlightRouteTakeoffLandingDuration
2026-05-29 FDX1869 OAK → LAX May 29, 10:57 UTCMay 29, 11:45 UTC48m
2026-05-29 FDX1869 OAK → LAX May 29, 11:00 UTCMay 29, 11:45 UTC45m
2026-05-28 FDX568 MEM → SEA May 28, 21:25 UTCMay 29, 00:55 UTC3h 30m
2026-05-28 FDX476 RDU → MEM May 28, 12:25 UTCMay 28, 13:45 UTC1h 20m
2026-05-28 FDX1738 IND → RDU May 28, 08:35 UTCMay 28, 09:40 UTC1h 5m
2026-05-28 FDX1738 IND → RDU May 28, 08:32 UTCMay 28, 09:36 UTC1h 4m
2026-05-27 FDX3649 MIA → IND May 27, 12:40 UTCMay 27, 14:45 UTC2h 5m
2026-05-27 FDX1707 MIA → IND May 27, 08:15 UTCMay 27, 10:30 UTC2h 15m
2026-05-27 FDX1609 DFW → IND May 27, 04:19 UTCMay 27, 05:55 UTC1h 35m
2026-05-23 FDX1401 MEM → DFW May 23, 09:00 UTCMay 23, 10:15 UTC1h 15m
2026-05-23 FDX1299 IAH → MEM May 23, 03:10 UTCMay 23, 04:10 UTC1h 0m
2026-05-23 FDX1299 IAH → MEM May 23, 03:08 UTCMay 23, 04:10 UTC1h 2m
2026-05-22 FDX1425 MEM → IAH May 22, 08:00 UTCMay 22, 09:10 UTC1h 10m
2026-05-22 FDX1219 SJC → MEM May 22, 01:55 UTCMay 22, 05:25 UTC3h 30m
2026-05-21 FDX540 MEM → SJC May 21, 20:05 UTCMay 21, 23:45 UTC3h 40m
2026-05-21 FDX9131 YMX → MEM May 21, 08:00 UTCMay 21, 10:15 UTC2h 15m
2026-05-20 FDX9129 - May 20, 18:05 UTCMay 20, 18:35 UTC30m
2026-05-20 FDX9129 - May 20, 16:50 UTCMay 20, 17:30 UTC40m
2026-04-20 FDX9130 MEM → YMX Apr 20, 02:30 UTCApr 20, 05:10 UTC2h 40m
2026-04-18 FDX815 LAX → MEM Apr 18, 13:10 UTCApr 18, 16:10 UTC3h 0m
2026-04-17 FDX1151 AFW → LAX Apr 17, 09:20 UTCApr 17, 11:15 UTC1h 55m
2026-04-17 FDX1151 AFW → LAX Apr 17, 08:25 UTCApr 17, 09:15 UTC50m
2026-04-17 FDX1100 LAX → AFW Apr 17, 05:20 UTCApr 17, 05:40 UTC20m
2026-04-17 FDX1100 LAX → AFW Apr 17, 03:25 UTCApr 17, 05:15 UTC1h 51m
2026-04-16 FDX1750 IND → LAX Apr 16, 11:09 UTCApr 16, 12:19 UTC1h 10m
2026-04-16 FDX1750 IND → LAX Apr 16, 09:10 UTCApr 16, 11:04 UTC1h 55m
2026-04-16 FDX1750 IND → LAX Apr 16, 08:19 UTCApr 16, 09:05 UTC45m
2026-04-16 FDX1631 CLE → IND Apr 16, 03:09 UTCApr 16, 03:30 UTC20m
2026-04-16 FDX1631 CLE → IND Apr 16, 02:45 UTCApr 16, 03:04 UTC20m
2026-04-15 FDX361 MEM → PIT Apr 15, 23:10 UTCApr 15, 23:20 UTC10m
2026-04-15 FDX361 MEM → PIT Apr 15, 21:55 UTCApr 15, 23:00 UTC1h 5m
2026-04-15 FDX876 SLC → MEM Apr 15, 15:05 UTCApr 15, 15:40 UTC35m
2026-04-15 FDX876 SLC → MEM Apr 15, 13:05 UTCApr 15, 14:55 UTC1h 49m
2026-04-15 FDX1879 OAK → SLC Apr 15, 09:40 UTCApr 15, 10:55 UTC1h 15m
2026-04-15 FDX1807 PDX → OAK Apr 15, 05:00 UTCApr 15, 05:25 UTC25m
2026-04-15 FDX1807 PDX → OAK Apr 15, 04:00 UTCApr 15, 04:50 UTC50m
2026-04-15 FDX382 PDX → OAK Apr 15, 01:05 UTCApr 15, 02:00 UTC55m
2026-04-14 FDX382 PDX → OAK Apr 14, 22:55 UTCApr 15, 00:50 UTC1h 55m
2026-04-14 FDX382 PDX → OAK Apr 14, 22:05 UTCApr 14, 22:50 UTC45m
2026-04-14 FDX825 - Apr 14, 12:50 UTCApr 14, 14:00 UTC1h 10m
2026-04-14 FDX825 - Apr 14, 12:20 UTCApr 14, 12:45 UTC25m
2026-04-14 FDX1771 IND → MCO Apr 14, 09:10 UTCApr 14, 10:10 UTC1h 0m
2026-04-14 FDX1771 IND → MCO Apr 14, 08:25 UTCApr 14, 09:05 UTC40m

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 N271FE page for operator, model, and routing details .

Mode-S A2AAB5 frequently asked

What is Mode-S code A2AAB5?
A2AAB5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N271FE.
Where is Mode-S A2AAB5 registered?
Mode-S code A2AAB5 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 A2AAB5 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2AAB5, octal 50525265, decimal 10,660,533.
What flights does A2AAB5 operate?
Mode-S A2AAB5 has broadcast 20 distinct callsigns, including FDX382, FDX1750, FDX9129, FDX876, FDX825.