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sensors Mode-S transponder

A8C397

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N664FE · AIRBUS A-300-600 · operated by FEDERAL EXPRESS CORP

Hex
A8C397
Octal
52141627
Decimal
11,060,119
Country
US
Tail
N664FE
Type
A306
Broadcasting now · callsign FDX1544 · 19,000 ft
Flights observed
129
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Current position

A8C397 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8C397 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
FDX137 - 6 2026-07-11
FDX1746 - 5 2026-07-08
FDX1433 - 5 2026-07-09
FDX134 - 5 2026-07-10
FDX1630 - 4 2026-07-08
FDX1605 - 4 2026-07-07
FDX1528 - 4 2026-06-25
FDX1486 FedEx Express 4 2026-06-11
FDX1285 - 4 2026-07-09
FDX981 FedEx Express 3 2026-06-18
FDX1500 FedEx Express 3 2026-05-30
FDX1459 FedEx Express 3 2026-06-05
FDX1453 - 3 2026-06-27
FDX1338 FedEx Express 3 2026-05-12
FDX1322 FedEx Express 3 2026-06-10
FDX1286 FedEx Express 3 2026-06-06
FDX1237 FedEx Express 3 2026-05-23
FDX756 FedEx Express 2 2026-05-25
FDX533 FedEx Express 2 2026-06-07
FDX394 - 2 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FDX1267 - Jul 14, 03:15 UTCJul 14, 05:50 UTC2h 35m
2026-07-12 FDX385 - Jul 12, 21:45 UTCJul 13, 00:10 UTC2h 25m
2026-07-11 FDX137 - Jul 11, 00:35 UTCJul 11, 02:55 UTC2h 20m
2026-07-10 FDX134 - Jul 10, 10:00 UTCJul 10, 12:30 UTC2h 30m
2026-07-10 FDX2338 - Jul 10, 01:25 UTCJul 10, 03:10 UTC1h 45m
2026-07-10 FDX2338 ORF → MEM Jul 10, 01:23 UTCJul 10, 03:10 UTC1h 47m
2026-07-09 FDX1433 - Jul 9, 08:50 UTCJul 9, 09:45 UTC55m
2026-07-09 FDX1433 MEM → ORF Jul 9, 08:45 UTCJul 9, 10:29 UTC1h 44m
2026-07-09 FDX1285 - Jul 9, 02:35 UTCJul 9, 03:35 UTC1h 0m
2026-07-08 FDX1746 IND → TYS Jul 8, 08:45 UTCJul 8, 09:30 UTC45m
2026-07-08 FDX1630 BWI → IND Jul 8, 02:50 UTCJul 8, 04:05 UTC1h 15m
2026-07-07 FDX1730 IND → BWI Jul 7, 09:00 UTCJul 7, 10:05 UTC1h 5m
2026-07-07 FDX1605 ATL → IND Jul 7, 02:10 UTCJul 7, 03:15 UTC1h 5m
2026-07-07 FDX1605 ATL → IND Jul 7, 02:09 UTCJul 7, 03:08 UTC59m
2026-07-03 FDX1703 - Jul 3, 07:30 UTCJul 3, 07:45 UTC15m
2026-07-03 FDX1647 ABE → IND Jul 3, 02:00 UTCJul 3, 03:15 UTC1h 15m
2026-07-02 FDX1747 - Jul 2, 12:40 UTCJul 2, 13:20 UTC40m
2026-07-02 FDX1747 - Jul 2, 08:30 UTCJul 2, 10:00 UTC1h 30m
2026-07-02 FDX2639 ORF → RIC Jul 2, 04:25 UTCJul 2, 05:05 UTC40m
2026-07-01 FDX1715 - Jul 1, 09:25 UTCJul 1, 10:00 UTC35m
2026-07-01 FDX1630 - Jul 1, 03:05 UTCJul 1, 04:20 UTC1h 15m
2026-07-01 FDX1630 BWI → IND Jul 1, 03:01 UTCJul 1, 04:15 UTC1h 14m
2026-06-30 FDX1482 - Jun 30, 09:25 UTCJun 30, 11:05 UTC1h 40m
2026-06-30 FDX1313 - Jun 30, 02:25 UTCJun 30, 03:20 UTC55m
2026-06-27 FDX1453 - Jun 27, 08:44 UTCJun 27, 09:34 UTC50m
2026-06-26 FDX1328 - Jun 26, 01:34 UTCJun 26, 03:29 UTC1h 55m
2026-06-25 FDX1528 - Jun 25, 08:45 UTCJun 25, 10:30 UTC1h 45m
2026-06-25 FDX1528 MEM → ROC Jun 25, 08:39 UTCJun 25, 10:27 UTC1h 48m
2026-06-25 FDX121 - Jun 25, 00:05 UTCJun 25, 03:04 UTC3h 0m
2026-06-24 FDX120 - Jun 24, 09:34 UTCJun 24, 13:24 UTC3h 50m
2026-06-24 FDX1388 - Jun 24, 02:30 UTCJun 24, 04:24 UTC1h 55m
2026-06-23 FDX1528 - Jun 23, 09:29 UTCJun 23, 11:14 UTC1h 45m
2026-06-23 FDX1245 - Jun 23, 02:49 UTCJun 23, 03:54 UTC1h 5m
2026-06-19 FDX1445 - Jun 19, 09:09 UTCJun 19, 10:14 UTC1h 5m
2026-06-19 FDX1381 OAK → MEM Jun 19, 02:05 UTCJun 19, 05:31 UTC3h 26m
2026-06-19 FDX1381 - Jun 19, 02:04 UTCJun 19, 05:30 UTC3h 25m
2026-06-18 FDX981 MEM → LAX Jun 18, 03:15 UTCJun 18, 05:45 UTC2h 30m
2026-06-18 FDX981 MEM → LAX Jun 18, 03:13 UTCJun 18, 06:11 UTC2h 58m
2026-06-18 FDX981 MEM → LAX Jun 18, 00:45 UTCJun 18, 01:50 UTC1h 5m
2026-06-17 FDX1257 - Jun 17, 03:00 UTCJun 17, 03:45 UTC45m
2026-06-16 FDX1479 - Jun 16, 09:34 UTCJun 16, 10:04 UTC30m
2026-06-12 FDX2237 LCK → MEM Jun 12, 03:45 UTCJun 12, 05:00 UTC1h 15m
2026-06-11 FDX1486 MEM → LCK Jun 11, 09:20 UTCJun 11, 10:30 UTC1h 10m
2026-06-11 FDX137 YWG → MEM Jun 11, 01:20 UTCJun 11, 04:15 UTC2h 55m
2026-06-10 FDX134 MEM → YWG Jun 10, 09:35 UTCJun 10, 11:55 UTC2h 20m
2026-06-10 FDX1322 GRR → MEM Jun 10, 03:15 UTCJun 10, 04:45 UTC1h 30m
2026-06-10 FDX1322 GRR → MEM Jun 10, 03:12 UTCJun 10, 04:45 UTC1h 33m
2026-06-09 FDX1536 MEM → GRR Jun 9, 08:55 UTCJun 9, 10:05 UTC1h 10m
2026-06-09 FDX1315 ELP → MEM Jun 9, 02:15 UTCJun 9, 04:10 UTC1h 55m
2026-06-07 FDX533 MEM → ELP Jun 7, 23:50 UTCJun 8, 01:05 UTC1h 15m

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 N664FE page for operator, model, and routing details .

Mode-S A8C397 frequently asked

What is Mode-S code A8C397?
A8C397 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N664FE.
Where is Mode-S A8C397 registered?
Mode-S code A8C397 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 A8C397 broadcasting right now?
Yes. Mode-S A8C397 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8C397, octal 52141627, decimal 11,060,119.
What flights does A8C397 operate?
Mode-S A8C397 has broadcast 20 distinct callsigns, including FDX137, FDX1746, FDX1433, FDX134, FDX1630.