Apparatus

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sensors Mode-S transponder

A1139F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N169FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A1139F
Octal
50211637
Decimal
10,556,319
Country
US
Tail
N169FE
Type
B763
No current signal · last broadcast 8h ago
Flights observed
104
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A1139F.

Country allocation

The ICAO 24-bit address A1139F 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
FDX379 FedEx Express 4 2026-05-29
FDX400 FedEx Express 3 2026-04-16
FDX1705 FedEx Express 3 2026-04-16
FDX1438 FedEx Express 3 2026-04-17
FDX855 FedEx Express 2 2026-05-08
FDX764 FedEx Express 2 2026-05-19
FDX762 FedEx Express 2 2026-04-16
FDX51 FedEx Express 2 2026-05-27
FDX505 FedEx Express 2 2026-05-30
FDX403 FedEx Express 2 2026-04-14
FDX251 FedEx Express 2 2026-05-15
FDX1876 FedEx Express 2 2026-05-08
FDX1853 FedEx Express 2 2026-05-28
FDX1806 FedEx Express 2 2026-05-08
FDX1735 FedEx Express 2 2026-04-15
FDX1601 FedEx Express 2 2026-04-16
FDX1471 FedEx Express 2 2026-05-22
FDX1466 FedEx Express 2 2026-05-05
FDX1402 FedEx Express 2 2026-05-16
FDX1188 FedEx Express 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 FDX1460 MEM → CVG Jun 2, 10:10 UTCJun 2, 11:05 UTC55m
2026-06-02 FDX1335 DTW → MEM Jun 2, 02:10 UTCJun 2, 03:55 UTC1h 45m
2026-05-30 FDX505 MEM → DTW May 30, 21:15 UTCMay 30, 22:35 UTC1h 20m
2026-05-30 FDX613 ELP → MEM May 30, 13:15 UTCMay 30, 14:55 UTC1h 40m
2026-05-29 FDX1188 SAT → ELP May 29, 10:00 UTCMay 29, 11:15 UTC1h 15m
2026-05-29 FDX1188 SAT → ELP May 29, 08:30 UTCMay 29, 09:10 UTC40m
2026-05-29 FDX1121 LRD → SAT May 29, 03:50 UTCMay 29, 04:40 UTC50m
2026-05-29 FDX379 MEM → SAT May 29, 00:10 UTCMay 29, 00:55 UTC45m
2026-05-28 FDX379 MEM → SAT May 28, 21:55 UTCMay 28, 23:20 UTC1h 25m
2026-05-28 FDX698 EWR → MEM May 28, 13:35 UTCMay 28, 16:30 UTC2h 55m
2026-05-28 FDX1853 OAK → ONT May 28, 09:34 UTCMay 28, 10:23 UTC49m
2026-05-28 FDX1853 OAK → ONT May 28, 09:35 UTCMay 28, 10:25 UTC50m
2026-05-28 FDX1807 PDX → OAK May 28, 04:00 UTCMay 28, 05:10 UTC1h 10m
2026-05-27 FDX382 PDX → OAK May 27, 22:35 UTCMay 28, 02:05 UTC3h 30m
2026-05-27 FDX252 SJU → MEM May 27, 14:20 UTCMay 27, 17:55 UTC3h 35m
2026-05-27 FDX51 MEM → SJU May 27, 12:00 UTCMay 27, 12:25 UTC25m
2026-05-27 FDX51 MEM → SJU May 27, 08:40 UTCMay 27, 10:25 UTC1h 45m
2026-05-27 FDX1276 JFK → MEM May 27, 02:04 UTCMay 27, 04:14 UTC2h 10m
2026-05-24 FDX558 MEM → JFK May 24, 20:30 UTCMay 24, 21:50 UTC1h 20m
2026-05-24 FDX108 ANC → MEM May 24, 10:15 UTCMay 24, 16:00 UTC5h 45m
2026-05-23 FDX157 ANC → NRT May 23, 09:30 UTCMay 23, 15:40 UTC6h 10m
2026-05-23 FDX1201 DFW → MEM May 23, 02:15 UTCMay 23, 03:15 UTC59m
2026-05-22 FDX1471 MEM → DFW May 22, 07:40 UTCMay 22, 08:40 UTC1h 0m
2026-05-22 FDX1471 MEM → DFW May 22, 07:37 UTCMay 22, 08:37 UTC1h 0m
2026-05-22 FDX1210 TPA → MEM May 22, 02:20 UTCMay 22, 03:40 UTC1h 20m
2026-05-21 FDX1759 IND → TPA May 21, 08:40 UTCMay 21, 10:25 UTC1h 45m
2026-05-21 FDX1628 DEN → IND May 21, 03:20 UTCMay 21, 05:15 UTC1h 55m
2026-05-20 FDX3702 IND → OAK May 20, 20:55 UTCMay 20, 23:20 UTC2h 25m
2026-05-20 FDX3649 MIA → IND May 20, 12:20 UTCMay 20, 14:35 UTC2h 15m
2026-05-20 FDX1707 MIA → IND May 20, 08:25 UTCMay 20, 10:35 UTC2h 10m
2026-05-20 FDX1612 JFK → IND May 20, 03:45 UTCMay 20, 05:15 UTC1h 31m
2026-05-19 FDX764 MEM → JFK May 19, 20:30 UTCMay 19, 22:35 UTC2h 5m
2026-05-19 FDX764 MEM → JFK May 19, 20:25 UTCMay 19, 22:38 UTC2h 13m
2026-05-19 FDX630 SEA → MEM May 19, 13:35 UTCMay 19, 17:25 UTC3h 50m
2026-05-19 FDX1885 OAK → SEA May 19, 09:55 UTCMay 19, 11:40 UTC1h 45m
2026-05-19 FDX1838 SEA → OAK May 19, 03:45 UTCMay 19, 05:10 UTC1h 25m
2026-05-16 FDX3954 SEA → LAX May 16, 19:10 UTCMay 17, 00:45 UTC5h 34m
2026-05-16 FDX1402 MEM → EWR May 16, 08:05 UTCMay 16, 10:11 UTC2h 5m
2026-05-16 FDX1402 MEM → EWR May 16, 08:02 UTCMay 16, 10:05 UTC2h 3m
2026-05-16 FDX52 SJU → MEM May 16, 01:25 UTCMay 16, 05:10 UTC3h 45m
2026-05-15 FDX251 MEM → SJU May 15, 23:05 UTCMay 15, 23:30 UTC25m
2026-05-15 FDX251 MEM → SJU May 15, 19:55 UTCMay 15, 21:40 UTC1h 45m
2026-05-14 FDX1243 CLT → MEM May 14, 02:20 UTCMay 14, 03:35 UTC1h 15m
2026-05-13 FDX1729 IND → CLT May 13, 08:35 UTCMay 13, 09:35 UTC1h 0m
2026-05-13 FDX1618 MSP → IND May 13, 03:00 UTCMay 13, 04:10 UTC1h 10m
2026-05-12 FDX1407 MEM → MSP May 12, 09:25 UTCMay 12, 11:00 UTC1h 35m
2026-05-12 FDX1208 GEG → MEM May 12, 02:45 UTCMay 12, 04:55 UTC2h 10m
2026-05-09 FDX1476 MEM → GEG May 9, 09:00 UTCMay 9, 12:30 UTC3h 30m
2026-05-08 FDX855 LAX → MEM May 8, 12:49 UTCMay 8, 15:55 UTC3h 5m
2026-05-08 FDX855 LAX → MEM May 8, 12:46 UTCMay 8, 15:55 UTC3h 9m

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 N169FE page for operator, model, and routing details .

Mode-S A1139F frequently asked

What is Mode-S code A1139F?
A1139F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N169FE.
Where is Mode-S A1139F registered?
Mode-S code A1139F 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 A1139F broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1139F, octal 50211637, decimal 10,556,319.
What flights does A1139F operate?
Mode-S A1139F has broadcast 20 distinct callsigns, including FDX379, FDX400, FDX1705, FDX1438, FDX855.