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sensors Mode-S transponder

A0AAA0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N142FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A0AAA0
Octal
50125240
Decimal
10,529,440
Country
US
Tail
N142FE
Type
B763
No current signal · last broadcast 2h ago
Flights observed
178
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A0AAA0.

Country allocation

The ICAO 24-bit address A0AAA0 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
FDX67 - 8 2026-06-30
FDX68 - 7 2026-07-01
FDX53 FedEx Express 6 2026-06-10
FDX54 - 5 2026-07-01
FDX82 - 4 2026-06-19
FDX89 FedEx Express 3 2026-06-02
FDX657 FedEx Express 3 2026-04-15
FDX605 FedEx Express 3 2026-05-24
FDX568 FedEx Express 3 2026-04-15
FDX52 - 3 2026-07-09
FDX51 FedEx Express 3 2026-05-26
FDX254 FedEx Express 3 2026-04-28
FDX1722 - 3 2026-06-24
FDX1645 FedEx Express 3 2026-04-16
FDX1471 - 3 2026-06-23
FDX1426 - 3 2026-07-03
FDX1414 - 3 2026-06-20
FDX1378 - 3 2026-07-07
FDX1344 - 3 2026-06-23
FDX1212 FedEx Express 3 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FDX1290 - Jul 14, 02:30 UTCJul 14, 05:50 UTC3h 20m
2026-07-13 FDX915 - Jul 13, 02:35 UTCJul 13, 03:20 UTC45m
2026-07-12 FDX915 - Jul 12, 21:45 UTCJul 13, 01:05 UTC3h 20m
2026-07-11 FDX830 - Jul 11, 11:45 UTCJul 11, 13:15 UTC1h 30m
2026-07-10 FDX1771 - Jul 10, 08:35 UTCJul 10, 10:20 UTC1h 45m
2026-07-10 FDX1609 DFW → IND Jul 10, 04:00 UTCJul 10, 05:45 UTC1h 45m
2026-07-09 FDX1401 - Jul 9, 09:20 UTCJul 9, 10:15 UTC55m
2026-07-09 FDX52 - Jul 9, 01:30 UTCJul 9, 05:15 UTC3h 45m
2026-07-08 FDX251 - Jul 8, 20:30 UTCJul 8, 22:00 UTC1h 30m
2026-07-08 FDX251 MEM → SJU Jul 8, 20:25 UTCJul 9, 00:15 UTC3h 50m
2026-07-07 FDX644 - Jul 7, 12:15 UTCJul 7, 14:20 UTC2h 5m
2026-07-07 FDX1431 - Jul 7, 08:10 UTCJul 7, 10:00 UTC1h 50m
2026-07-07 FDX1378 - Jul 7, 02:55 UTCJul 7, 04:10 UTC1h 15m
2026-07-07 FDX1378 AFW → MEM Jul 7, 02:50 UTCJul 7, 04:10 UTC1h 20m
2026-07-06 FDX1378 - Jul 6, 23:30 UTCJul 7, 00:15 UTC45m
2026-07-03 FDX1426 AUS → SAT Jul 3, 09:35 UTCJul 3, 10:00 UTC25m
2026-07-03 FDX1426 AUS → SAT Jul 3, 09:35 UTCJul 3, 09:53 UTC18m
2026-07-03 FDX1426 MEM → AUS Jul 3, 07:30 UTCJul 3, 08:45 UTC1h 15m
2026-07-03 FDX1248 GSO → MEM Jul 3, 01:58 UTCJul 3, 03:23 UTC1h 25m
2026-07-02 FDX1580 - Jul 2, 09:35 UTCJul 2, 10:50 UTC1h 15m
2026-07-01 FDX54 - Jul 1, 10:05 UTCJul 2, 05:35 UTC19h 30m
2026-07-01 FDX54 - Jul 1, 09:40 UTCJul 2, 05:35 UTC19h 55m
2026-07-01 FDX68 - Jul 1, 02:50 UTCJul 1, 04:40 UTC1h 50m
2026-06-30 FDX67 - Jun 30, 10:15 UTCJun 30, 12:05 UTC1h 50m
2026-06-30 FDX1263 - Jun 30, 03:50 UTCJun 30, 04:40 UTC50m
2026-06-28 FDX727 - Jun 28, 22:15 UTCJun 28, 23:04 UTC50m
2026-06-27 FDX168 - Jun 27, 23:39 UTCJun 28, 01:34 UTC1h 55m
2026-06-27 FDX67 - Jun 27, 09:40 UTCJun 27, 11:35 UTC1h 55m
2026-06-27 FDX1201 - Jun 27, 02:20 UTCJun 27, 03:20 UTC1h 0m
2026-06-26 FDX1735 - Jun 26, 07:35 UTCJun 26, 09:20 UTC1h 45m
2026-06-25 FDX3646 ONT → IND Jun 25, 13:40 UTCJun 25, 16:55 UTC3h 15m
2026-06-25 FDX1438 - Jun 25, 08:24 UTCJun 25, 11:44 UTC3h 20m
2026-06-25 FDX1203 - Jun 25, 01:30 UTCJun 25, 02:54 UTC1h 25m
2026-06-24 FDX1722 - Jun 24, 08:30 UTCJun 24, 09:19 UTC50m
2026-06-24 FDX1609 - Jun 24, 03:40 UTCJun 24, 05:15 UTC1h 35m
2026-06-23 FDX1471 - Jun 23, 08:04 UTCJun 23, 09:09 UTC1h 5m
2026-06-23 FDX1344 - Jun 23, 02:04 UTCJun 23, 04:29 UTC2h 25m
2026-06-20 FDX1414 - Jun 20, 09:59 UTCJun 20, 12:30 UTC2h 30m
2026-06-19 FDX82 - Jun 19, 10:04 UTCJun 20, 04:14 UTC18h 10m
2026-06-19 FDX82 - Jun 19, 09:30 UTCJun 20, 04:14 UTC18h 45m
2026-06-19 FDX1359 - Jun 19, 02:19 UTCJun 19, 05:14 UTC2h 55m
2026-06-19 FDX1359 - Jun 19, 00:14 UTCJun 19, 00:49 UTC35m
2026-06-18 FDX1573 - Jun 18, 14:01 UTCJun 18, 14:20 UTC20m
2026-06-18 FDX1573 - Jun 18, 09:15 UTCJun 18, 12:10 UTC2h 55m
2026-06-18 FDX1243 - Jun 18, 02:45 UTCJun 18, 04:00 UTC1h 15m
2026-06-17 FDX1729 - Jun 17, 08:15 UTCJun 17, 09:10 UTC55m
2026-06-17 FDX1610 BOS → IND Jun 17, 02:15 UTCJun 17, 04:25 UTC2h 10m
2026-06-16 FDX3714 - Jun 16, 21:25 UTCJun 16, 23:05 UTC1h 40m
2026-06-16 FDX3714 IND → BOS Jun 16, 21:21 UTCJun 16, 23:00 UTC1h 39m
2026-06-16 FDX3619 - Jun 16, 13:19 UTCJun 16, 17:05 UTC3h 45m

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 N142FE page for operator, model, and routing details .

Mode-S A0AAA0 frequently asked

What is Mode-S code A0AAA0?
A0AAA0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N142FE.
Where is Mode-S A0AAA0 registered?
Mode-S code A0AAA0 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 A0AAA0 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0AAA0, octal 50125240, decimal 10,529,440.
What flights does A0AAA0 operate?
Mode-S A0AAA0 has broadcast 20 distinct callsigns, including FDX67, FDX68, FDX53, FDX54, FDX82.