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 11h ago
Flights observed
123
Distinct callsigns
20
Country
US
Last broadcast
11h 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
FDX1100 FedEx Express 4 2026-06-11
FDX382 FedEx Express 3 2026-04-15
FDX2629 FedEx Express 3 2026-07-01
FDX1750 FedEx Express 3 2026-04-16
FDX1253 - 3 2026-06-17
FDX9129 - 2 2026-05-20
FDX876 FedEx Express 2 2026-04-15
FDX853 FedEx Express 2 2026-06-03
FDX825 - 2 2026-04-14
FDX546 FedEx Express 2 2026-06-10
FDX3709 - 2 2026-06-27
FDX361 FedEx Express 2 2026-04-15
FDX303 FedEx Express 2 2026-05-31
FDX1869 FedEx Express 2 2026-05-29
FDX1807 FedEx Express 2 2026-04-15
FDX1774 - 2 2026-07-10
FDX1771 FedEx Express 2 2026-04-14
FDX1738 FedEx Express 2 2026-05-28
FDX1631 FedEx Express 2 2026-04-16
FDX1612 - 2 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FDX1188 - Jul 14, 10:30 UTCJul 14, 11:30 UTC1h 0m
2026-07-14 FDX1188 - Jul 14, 08:30 UTCJul 14, 09:25 UTC55m
2026-07-14 FDX1124 ATL → AFW Jul 14, 03:50 UTCJul 14, 05:30 UTC1h 40m
2026-07-10 FDX1774 IND → ATL Jul 10, 08:50 UTCJul 10, 09:50 UTC1h 0m
2026-07-10 FDX1774 IND → ATL Jul 10, 08:50 UTCJul 10, 09:56 UTC1h 6m
2026-07-10 FDX2613 - Jul 10, 03:40 UTCJul 10, 04:45 UTC1h 5m
2026-07-09 FDX1713 - Jul 9, 08:30 UTCJul 9, 09:55 UTC1h 25m
2026-07-09 FDX1617 - Jul 9, 03:25 UTCJul 9, 05:05 UTC1h 40m
2026-07-08 FDX1732 - Jul 8, 08:25 UTCJul 8, 10:10 UTC1h 45m
2026-07-08 FDX1610 BOS → IND Jul 8, 02:26 UTCJul 8, 04:26 UTC2h 0m
2026-07-08 FDX1610 - Jul 8, 02:30 UTCJul 8, 04:25 UTC1h 55m
2026-07-07 FDX3714 IND → BOS Jul 7, 22:10 UTCJul 7, 23:55 UTC1h 45m
2026-07-07 FDX3619 - Jul 7, 14:00 UTCJul 7, 17:35 UTC3h 35m
2026-07-07 FDX1404 - Jul 7, 08:20 UTCJul 7, 11:35 UTC3h 15m
2026-07-07 FDX1404 MEM → LAX Jul 7, 08:16 UTCJul 7, 11:34 UTC3h 18m
2026-07-07 FDX1335 - Jul 7, 02:20 UTCJul 7, 03:50 UTC1h 30m
2026-07-03 FDX1418 - Jul 3, 08:40 UTCJul 3, 10:00 UTC1h 20m
2026-07-03 FDX1418 MEM → DTW Jul 3, 08:35 UTCJul 3, 10:00 UTC1h 25m
2026-07-02 FDX1222 - Jul 2, 02:30 UTCJul 2, 05:45 UTC3h 15m
2026-07-01 FDX1754 - Jul 1, 09:00 UTCJul 1, 12:35 UTC3h 35m
2026-07-01 FDX2629 GSO → IND Jul 1, 02:00 UTCJul 1, 03:55 UTC1h 55m
2026-07-01 FDX2629 GSO → IND Jul 1, 02:00 UTCJul 1, 03:48 UTC1h 48m
2026-06-30 FDX1759 - Jun 30, 08:55 UTCJun 30, 10:35 UTC1h 40m
2026-06-30 FDX2684 MEM → IND Jun 30, 02:20 UTCJun 30, 04:25 UTC2h 5m
2026-06-28 FDX789 - Jun 28, 20:50 UTCJun 28, 22:45 UTC1h 55m
2026-06-28 FDX405 - Jun 28, 11:29 UTCJun 28, 13:40 UTC2h 10m
2026-06-27 FDX3709 - Jun 27, 20:49 UTCJun 27, 22:20 UTC1h 30m
2026-06-27 FDX3609 EWR → IND Jun 27, 11:50 UTCJun 27, 13:20 UTC1h 30m
2026-06-27 FDX3926 BOS → EWR Jun 27, 03:15 UTCJun 27, 03:55 UTC40m
2026-06-26 FDX1406 - Jun 26, 08:10 UTCJun 26, 10:20 UTC2h 10m
2026-06-26 FDX141 - Jun 26, 02:14 UTCJun 26, 05:19 UTC3h 5m
2026-06-25 FDX140 - Jun 25, 08:50 UTCJun 25, 12:25 UTC3h 35m
2026-06-25 FDX1334 - Jun 25, 02:05 UTCJun 25, 03:15 UTC1h 10m
2026-06-25 FDX1334 ABQ → MEM Jun 25, 02:05 UTCJun 25, 04:01 UTC1h 56m
2026-06-24 FDX1583 - Jun 24, 09:34 UTCJun 24, 11:39 UTC2h 5m
2026-06-24 FDX1583 MEM → ABQ Jun 24, 09:33 UTCJun 24, 11:35 UTC2h 2m
2026-06-24 FDX2361 SDF → MEM Jun 24, 04:34 UTCJun 24, 05:24 UTC50m
2026-06-23 FDX1467 - Jun 23, 09:49 UTCJun 23, 10:39 UTC50m
2026-06-23 FDX1207 - Jun 23, 02:09 UTCJun 23, 05:29 UTC3h 20m
2026-06-22 FDX1207 OAK → SJC Jun 22, 23:45 UTCJun 23, 00:04 UTC20m
2026-06-19 FDX1806 DFW → OAK Jun 19, 03:55 UTCJun 19, 06:59 UTC3h 5m
2026-06-18 FDX1723 - Jun 18, 09:00 UTCJun 18, 10:40 UTC1h 40m
2026-06-18 FDX1612 JFK → IND Jun 18, 03:38 UTCJun 18, 05:21 UTC1h 43m
2026-06-18 FDX1612 JFK → IND Jun 18, 03:40 UTCJun 18, 05:20 UTC1h 40m
2026-06-17 FDX764 - Jun 17, 20:35 UTCJun 17, 22:55 UTC2h 20m
2026-06-17 FDX252 - Jun 17, 13:45 UTCJun 17, 17:35 UTC3h 50m
2026-06-17 FDX51 - Jun 17, 08:40 UTCJun 17, 12:15 UTC3h 35m
2026-06-17 FDX1253 ABE → MEM Jun 17, 01:35 UTCJun 17, 03:43 UTC2h 8m
2026-06-17 FDX1253 - Jun 17, 01:35 UTCJun 17, 03:50 UTC2h 15m
2026-06-16 FDX1497 - Jun 16, 08:35 UTCJun 16, 10:15 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 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 11h 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 FDX1100, FDX382, FDX2629, FDX1750, FDX1253.