Apparatus

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sensors Mode-S transponder

A8DFF1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N671FE · AIRBUS A-300-600 · operated by FEDERAL EXPRESS CORP

Hex
A8DFF1
Octal
52157761
Decimal
11,067,377
Country
US
Tail
N671FE
Type
A306
No current signal · last broadcast 5h ago
Flights observed
138
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A8DFF1.

Country allocation

The ICAO 24-bit address A8DFF1 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
FDX1571 - 7 2026-06-25
FDX1330 - 7 2026-07-03
FDX1272 - 7 2026-07-11
FDX1528 - 5 2026-07-03
FDX1478 - 5 2026-07-02
FDX1289 - 5 2026-07-09
FDX1217 - 5 2026-07-02
FDX1648 FedEx Express 4 2026-04-29
FDX1489 - 4 2026-07-08
FDX137 - 4 2026-06-13
FDX134 - 4 2026-06-12
FDX1303 FedEx Express 4 2026-05-20
FDX944 FedEx Express 3 2026-04-16
FDX1730 - 3 2026-07-01
FDX1670 - 3 2026-06-26
FDX1453 - 3 2026-06-20
FDX1328 - 3 2026-06-25
FDX1313 - 3 2026-06-23
FDX2328 - 2 2026-07-07
FDX1755 FedEx Express 2 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FDX2237 - Jul 14, 02:25 UTCJul 14, 03:35 UTC1h 10m
2026-07-11 FDX1486 - Jul 11, 09:20 UTCJul 11, 10:25 UTC1h 5m
2026-07-11 FDX1272 - Jul 11, 04:25 UTCJul 11, 05:20 UTC55m
2026-07-11 FDX1272 - Jul 11, 02:50 UTCJul 11, 03:15 UTC25m
2026-07-10 FDX1472 - Jul 10, 09:55 UTCJul 10, 10:55 UTC1h 0m
2026-07-10 FDX1322 - Jul 10, 03:15 UTCJul 10, 05:05 UTC1h 50m
2026-07-09 FDX1536 - Jul 9, 08:55 UTCJul 9, 10:10 UTC1h 15m
2026-07-09 FDX1289 - Jul 9, 02:10 UTCJul 9, 04:00 UTC1h 50m
2026-07-08 FDX1489 - Jul 8, 08:55 UTCJul 8, 10:40 UTC1h 45m
2026-07-08 FDX1289 - Jul 8, 02:30 UTCJul 8, 04:10 UTC1h 40m
2026-07-07 FDX1489 - Jul 7, 09:20 UTCJul 7, 11:05 UTC1h 45m
2026-07-07 FDX2328 - Jul 7, 05:20 UTCJul 7, 06:20 UTC1h 0m
2026-07-07 FDX2328 ROC → IND Jul 7, 01:50 UTCJul 7, 03:05 UTC1h 15m
2026-07-03 FDX1528 - Jul 3, 09:05 UTCJul 3, 10:55 UTC1h 50m
2026-07-03 FDX1528 MEM → ROC Jul 3, 09:04 UTCJul 3, 11:01 UTC1h 57m
2026-07-03 FDX1330 - Jul 3, 02:10 UTCJul 3, 03:30 UTC1h 20m
2026-07-03 FDX1330 MSN → MEM Jul 3, 02:09 UTCJul 3, 03:30 UTC1h 21m
2026-07-02 FDX1478 - Jul 2, 09:15 UTCJul 2, 10:35 UTC1h 20m
2026-07-02 FDX1217 - Jul 2, 02:25 UTCJul 2, 04:10 UTC1h 45m
2026-07-01 FDX1730 IND → BWI Jul 1, 08:45 UTCJul 1, 09:55 UTC1h 10m
2026-06-29 FDX985 - Jun 29, 15:24 UTCJun 29, 16:25 UTC1h 0m
2026-06-27 FDX3685 - Jun 27, 14:35 UTCJun 27, 17:44 UTC3h 10m
2026-06-26 FDX1785 - Jun 26, 08:45 UTCJun 26, 12:55 UTC4h 10m
2026-06-26 FDX1670 - Jun 26, 02:30 UTCJun 26, 03:50 UTC1h 20m
2026-06-26 FDX1670 MDT → IND Jun 26, 02:26 UTCJun 26, 03:49 UTC1h 23m
2026-06-25 FDX1571 - Jun 25, 09:14 UTCJun 25, 10:50 UTC1h 35m
2026-06-25 FDX1328 - Jun 25, 01:35 UTCJun 25, 03:29 UTC1h 55m
2026-06-24 FDX1528 - Jun 24, 08:39 UTCJun 24, 10:25 UTC1h 45m
2026-06-24 FDX121 - Jun 24, 00:09 UTCJun 24, 03:15 UTC3h 5m
2026-06-23 FDX120 - Jun 23, 09:40 UTCJun 23, 13:34 UTC3h 55m
2026-06-23 FDX1313 - Jun 23, 02:34 UTCJun 23, 03:20 UTC45m
2026-06-20 FDX1453 - Jun 20, 09:05 UTCJun 20, 09:54 UTC50m
2026-06-19 FDX1257 - Jun 19, 02:59 UTCJun 19, 03:39 UTC40m
2026-06-18 FDX1479 - Jun 18, 09:55 UTCJun 18, 10:35 UTC40m
2026-06-18 FDX1330 - Jun 18, 04:40 UTCJun 18, 06:10 UTC1h 30m
2026-06-17 FDX1478 - Jun 17, 09:05 UTCJun 17, 10:30 UTC1h 25m
2026-06-17 FDX1217 - Jun 17, 02:25 UTCJun 17, 04:25 UTC2h 0m
2026-06-16 FDX1482 - Jun 16, 08:55 UTCJun 16, 10:20 UTC1h 25m
2026-06-13 FDX137 - Jun 13, 00:50 UTCJun 13, 03:05 UTC2h 15m
2026-06-12 FDX134 - Jun 12, 10:25 UTCJun 12, 12:50 UTC2h 25m
2026-06-12 FDX1328 ROC → MEM Jun 12, 01:40 UTCJun 12, 03:35 UTC1h 55m
2026-06-11 FDX1528 MEM → ROC Jun 11, 09:05 UTCJun 11, 10:55 UTC1h 50m
2026-06-11 FDX1309 STL → MEM Jun 11, 04:00 UTCJun 11, 04:45 UTC45m
2026-06-11 FDX1309 STL → MEM Jun 11, 03:55 UTCJun 11, 04:41 UTC46m
2026-06-10 FDX1523 MEM → STL Jun 10, 09:40 UTCJun 10, 10:20 UTC40m
2026-06-10 FDX1285 RIC → MEM Jun 10, 02:30 UTCJun 10, 03:20 UTC50m
2026-06-09 FDX1746 IND → TYS Jun 9, 09:00 UTCJun 9, 09:40 UTC40m
2026-06-09 FDX1746 IND → TYS Jun 9, 08:56 UTCJun 9, 09:41 UTC45m
2026-06-09 FDX1670 MDT → IND Jun 9, 02:40 UTCJun 9, 04:00 UTC1h 20m
2026-06-06 FDX1571 MEM → MDT Jun 6, 11:09 UTCJun 6, 11:55 UTC45m

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 N671FE page for operator, model, and routing details .

Mode-S A8DFF1 frequently asked

What is Mode-S code A8DFF1?
A8DFF1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N671FE.
Where is Mode-S A8DFF1 registered?
Mode-S code A8DFF1 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 A8DFF1 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8DFF1, octal 52157761, decimal 11,067,377.
What flights does A8DFF1 operate?
Mode-S A8DFF1 has broadcast 20 distinct callsigns, including FDX1571, FDX1330, FDX1272, FDX1528, FDX1478.