Apparatus

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sensors Mode-S transponder

A0FD55

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N163FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A0FD55
Octal
50176525
Decimal
10,550,613
Country
US
Tail
N163FE
Type
B763
No current signal · last broadcast 19d ago
Flights observed
161
Distinct callsigns
20
Country
US
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S A0FD55.

Country allocation

The ICAO 24-bit address A0FD55 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
FDX140 - 4 2026-07-01
FDX1155 - 4 2026-07-09
FDX1627 FedEx Express 3 2026-06-09
FDX1610 - 3 2026-06-24
FDX1450 - 3 2026-07-17
FDX141 - 3 2026-07-01
FDX1226 FedEx Express 3 2026-05-28
FDX922 - 2 2026-07-01
FDX9129 - 2 2026-05-01
FDX82 - 2 2026-06-16
FDX68 FedEx Express 2 2026-06-03
FDX66 FedEx Express 2 2026-07-19
FDX653 FedEx Express 2 2026-06-07
FDX65 - 2 2026-07-18
FDX3714 - 2 2026-06-23
FDX3700 FedEx Express 2 2026-06-09
FDX266 - 2 2026-07-07
FDX265 - 2 2026-07-07
FDX2613 FedEx Express 2 2026-06-23
FDX2203 FedEx Express 2 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 FDX1841 - Jul 22, 02:45 UTCJul 22, 05:25 UTC2h 40m
2026-07-21 FDX1841 OAK → AFW Jul 21, 22:30 UTCJul 22, 01:25 UTC2h 55m
2026-07-21 FDX1705 - Jul 21, 08:55 UTCJul 21, 12:45 UTC3h 50m
2026-07-21 FDX2684 - Jul 21, 02:15 UTCJul 21, 04:25 UTC2h 10m
2026-07-19 FDX789 - Jul 19, 21:00 UTCJul 19, 23:00 UTC2h 0m
2026-07-19 FDX66 GDL → MEM Jul 19, 00:45 UTCJul 19, 02:50 UTC2h 5m
2026-07-18 FDX65 - Jul 18, 09:45 UTCJul 18, 11:35 UTC1h 50m
2026-07-18 FDX65 MEM → GDL Jul 18, 09:42 UTCJul 18, 12:15 UTC2h 33m
2026-07-18 FDX2284 - Jul 18, 03:10 UTCJul 18, 04:05 UTC55m
2026-07-17 FDX1450 - Jul 17, 08:45 UTCJul 17, 09:35 UTC50m
2026-07-17 FDX1365 DFW → MEM Jul 17, 04:25 UTCJul 17, 05:30 UTC1h 5m
2026-07-16 FDX1471 - Jul 16, 07:40 UTCJul 16, 08:40 UTC1h 0m
2026-07-16 FDX1238 - Jul 16, 02:45 UTCJul 16, 04:00 UTC1h 15m
2026-07-16 FDX1238 MKE → MEM Jul 16, 02:45 UTCJul 16, 04:03 UTC1h 18m
2026-07-15 FDX1437 - Jul 15, 09:15 UTCJul 15, 10:35 UTC1h 20m
2026-07-15 FDX1378 - Jul 15, 02:10 UTCJul 15, 03:25 UTC1h 15m
2026-07-15 FDX1378 - Jul 15, 00:25 UTCJul 15, 01:10 UTC45m
2026-07-14 FDX1425 - Jul 14, 08:45 UTCJul 14, 10:05 UTC1h 20m
2026-07-14 FDX1425 MEM → IAH Jul 14, 08:41 UTCJul 14, 10:00 UTC1h 19m
2026-07-14 FDX1243 - Jul 14, 02:35 UTCJul 14, 03:50 UTC1h 15m
2026-07-14 FDX1243 CLT → MEM Jul 14, 02:32 UTCJul 14, 03:46 UTC1h 14m
2026-07-10 FDX1492 - Jul 10, 08:55 UTCJul 10, 10:05 UTC1h 10m
2026-07-10 FDX1365 - Jul 10, 04:40 UTCJul 10, 05:50 UTC1h 10m
2026-07-09 FDX1136 LRD → DFW Jul 9, 21:50 UTCJul 9, 22:50 UTC1h 0m
2026-07-09 FDX1155 - Jul 9, 10:15 UTCJul 9, 11:00 UTC45m
2026-07-09 FDX1155 - Jul 9, 08:30 UTCJul 9, 09:05 UTC35m
2026-07-09 FDX1100 - Jul 9, 03:25 UTCJul 9, 05:50 UTC2h 25m
2026-07-08 FDX1508 - Jul 8, 09:15 UTCJul 8, 12:25 UTC3h 10m
2026-07-08 FDX66 GDL → MEM Jul 8, 01:52 UTCJul 8, 04:30 UTC2h 38m
2026-07-07 FDX265 - Jul 7, 20:30 UTCJul 8, 04:35 UTC8h 5m
2026-07-07 FDX266 - Jul 7, 10:25 UTCJul 7, 18:20 UTC7h 55m
2026-07-07 FDX1247 - Jul 7, 04:20 UTCJul 7, 05:30 UTC1h 10m
2026-07-07 FDX1247 ORD → MEM Jul 7, 04:15 UTCJul 7, 05:27 UTC1h 12m
2026-07-03 FDX1405 - Jul 3, 09:20 UTCJul 3, 10:30 UTC1h 10m
2026-07-03 FDX1240 - Jul 3, 02:20 UTCJul 3, 05:10 UTC2h 50m
2026-07-02 FDX1440 - Jul 2, 09:40 UTCJul 2, 12:35 UTC2h 55m
2026-07-02 FDX1205 - Jul 2, 02:50 UTCJul 2, 04:15 UTC1h 25m
2026-07-01 FDX922 - Jul 1, 22:15 UTCJul 1, 23:35 UTC1h 20m
2026-07-01 FDX922 MEM → ORD Jul 1, 22:10 UTCJul 1, 23:30 UTC1h 20m
2026-07-01 FDX9104 - Jul 1, 13:50 UTCJul 1, 17:05 UTC3h 15m
2026-07-01 FDX140 - Jul 1, 09:05 UTCJul 1, 12:15 UTC3h 10m
2026-07-01 FDX141 YYC → MEM Jul 1, 02:05 UTCJul 1, 05:40 UTC3h 35m
2026-06-30 FDX140 - Jun 30, 09:40 UTCJun 30, 13:05 UTC3h 25m
2026-06-30 FDX1358 - Jun 30, 02:45 UTCJun 30, 04:20 UTC1h 35m
2026-06-27 FDX1407 - Jun 27, 09:24 UTCJun 27, 11:04 UTC1h 40m
2026-06-27 FDX2203 PHX → MEM Jun 27, 03:15 UTCJun 27, 04:09 UTC55m
2026-06-27 FDX2203 PHX → MEM Jun 27, 01:35 UTCJun 27, 02:14 UTC40m
2026-06-26 FDX1722 - Jun 26, 09:20 UTCJun 26, 10:10 UTC50m
2026-06-26 FDX1722 IND → PIT Jun 26, 09:19 UTCJun 26, 10:10 UTC51m
2026-06-26 FDX1609 DFW → IND Jun 26, 03:50 UTCJun 26, 05:24 UTC1h 35m

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 N163FE page for operator, model, and routing details .

Mode-S A0FD55 frequently asked

What is Mode-S code A0FD55?
A0FD55 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N163FE.
Where is Mode-S A0FD55 registered?
Mode-S code A0FD55 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 A0FD55 broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0FD55, octal 50176525, decimal 10,550,613.
What flights does A0FD55 operate?
Mode-S A0FD55 has broadcast 20 distinct callsigns, including FDX140, FDX1155, FDX1627, FDX1610, FDX1450.