Apparatus

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sensors Mode-S transponder

A8F63B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N677FE · AIRBUS A-300-600 · operated by FEDERAL EXPRESS CORP

Hex
A8F63B
Octal
52173073
Decimal
11,073,083
Country
US
Tail
N677FE
Type
A306
No current signal · last broadcast 10h ago
Flights observed
67
Distinct callsigns
20
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A8F63B.

Country allocation

The ICAO 24-bit address A8F63B 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
FDX1303 FedEx Express 4 2026-04-28
FDX1526 FedEx Express 3 2026-05-21
FDX1465 FedEx Express 3 2026-06-02
FDX134 FedEx Express 3 2026-05-25
FDX1245 FedEx Express 3 2026-05-08
FDX985 FedEx Express 2 2026-05-01
FDX533 FedEx Express 2 2026-05-18
FDX2266 FedEx Express 2 2026-06-02
FDX1583 FedEx Express 2 2026-05-03
FDX1571 FedEx Express 2 2026-04-17
FDX1564 FedEx Express 2 2026-04-24
FDX1523 FedEx Express 2 2026-04-22
FDX1473 FedEx Express 2 2026-05-28
FDX1418 - 2 2026-04-14
FDX137 FedEx Express 2 2026-05-26
FDX1350 FedEx Express 2 2026-05-22
FDX1315 FedEx Express 2 2026-05-19
FDX1309 FedEx Express 2 2026-04-23
FDX1295 FedEx Express 2 2026-04-24
FDX1267 FedEx Express 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 FDX1465 MEM → RSW Jun 2, 09:00 UTCJun 2, 10:35 UTC1h 35m
2026-06-02 FDX2266 RSW → MEM Jun 2, 01:10 UTCJun 2, 02:55 UTC1h 45m
2026-06-02 FDX2266 RSW → MEM Jun 2, 01:08 UTCJun 2, 02:55 UTC1h 47m
2026-05-30 FDX1465 MEM → RSW May 30, 09:00 UTCMay 30, 10:35 UTC1h 35m
2026-05-29 FDX1267 SDF → MEM May 29, 11:10 UTCMay 30, 05:30 UTC18h 20m
2026-05-29 FDX1267 SDF → MEM May 29, 09:00 UTCMay 30, 05:30 UTC20h 30m
2026-05-29 FDX1206 BOS → MEM May 29, 00:35 UTCMay 29, 03:00 UTC2h 25m
2026-05-28 FDX1473 MEM → BOS May 28, 08:55 UTCMay 28, 11:10 UTC2h 15m
2026-05-28 FDX1294 PHL → MEM May 28, 01:30 UTCMay 28, 03:30 UTC2h 0m
2026-05-27 FDX1428 MEM → PHL May 27, 08:35 UTCMay 27, 10:20 UTC1h 45m
2026-05-27 FDX121 YYC → MEM May 27, 00:04 UTCMay 27, 03:29 UTC3h 25m
2026-05-26 FDX120 MEM → YEG May 26, 09:09 UTCMay 26, 12:35 UTC3h 25m
2026-05-26 FDX137 YWG → MEM May 26, 01:10 UTCMay 26, 03:30 UTC2h 20m
2026-05-25 FDX134 MEM → YWG May 25, 08:30 UTCMay 25, 10:45 UTC2h 15m
2026-05-25 FDX134 MEM → YWG May 25, 08:26 UTCMay 25, 10:45 UTC2h 19m
2026-05-23 FDX1266 RSW → MIA May 23, 01:00 UTCMay 23, 02:35 UTC1h 34m
2026-05-22 FDX1465 MEM → RSW May 22, 08:10 UTCMay 22, 09:50 UTC1h 40m
2026-05-22 FDX1350 BFM → MEM May 22, 02:30 UTCMay 22, 03:10 UTC40m
2026-05-21 FDX1526 MEM → BFM May 21, 08:55 UTCMay 21, 09:45 UTC50m
2026-05-20 FDX1322 GRR → MEM May 20, 03:15 UTCMay 20, 04:45 UTC1h 31m
2026-05-19 FDX1536 MEM → GRR May 19, 08:35 UTCMay 19, 09:50 UTC1h 15m
2026-05-19 FDX1315 ELP → MEM May 19, 04:50 UTCMay 19, 06:15 UTC1h 25m
2026-05-19 FDX1315 ELP → MEM May 19, 02:05 UTCMay 19, 03:35 UTC1h 30m
2026-05-18 FDX533 MEM → ELP May 18, 00:45 UTCMay 18, 02:00 UTC1h 15m
2026-05-17 FDX533 MEM → ELP May 17, 21:40 UTCMay 17, 23:00 UTC1h 20m
2026-05-17 FDX9030 OAK → LAX May 17, 15:05 UTCMay 17, 15:55 UTC50m
2026-05-08 FDX9090 OAK → MEM May 8, 14:15 UTCMay 8, 15:05 UTC50m
2026-05-08 FDX1245 CAE → MEM May 8, 07:50 UTCMay 8, 08:40 UTC50m
2026-05-08 FDX1245 CAE → MEM May 8, 07:45 UTCMay 8, 08:39 UTC54m
2026-05-08 FDX1245 CAE → MEM May 8, 02:44 UTCMay 8, 03:39 UTC55m
2026-05-07 FDX1445 MEM → CAE May 7, 09:30 UTCMay 7, 10:35 UTC1h 5m
2026-05-07 FDX1289 PBI → MEM May 7, 02:15 UTCMay 7, 04:40 UTC2h 25m
2026-05-06 FDX1489 MEM → PBI May 6, 10:40 UTCMay 6, 12:20 UTC1h 40m
2026-05-05 FDX1334 ABQ → MEM May 5, 02:20 UTCMay 5, 04:10 UTC1h 50m
2026-05-03 FDX1583 MEM → ABQ May 3, 00:30 UTCMay 3, 01:15 UTC45m
2026-05-02 FDX1583 MEM → ABQ May 2, 21:15 UTCMay 2, 22:45 UTC1h 30m
2026-05-01 FDX1385 TPA → MEM May 1, 04:40 UTCMay 1, 05:30 UTC50m
2026-05-01 FDX985 MEM → SYR May 1, 01:50 UTCMay 1, 02:40 UTC50m
2026-05-01 FDX985 MEM → SYR May 1, 01:49 UTCMay 1, 02:40 UTC51m
2026-04-30 FDX1330 MSN → MEM Apr 30, 02:20 UTCApr 30, 03:35 UTC1h 15m
2026-04-29 FDX1478 MEM → MSN Apr 29, 10:05 UTCApr 29, 11:25 UTC1h 20m
2026-04-29 FDX1206 BOS → MEM Apr 29, 00:45 UTCApr 29, 03:55 UTC3h 10m
2026-04-28 FDX1473 MEM → BOS Apr 28, 10:30 UTCApr 28, 12:45 UTC2h 15m
2026-04-28 FDX1303 MDT → MEM Apr 28, 03:05 UTCApr 28, 05:05 UTC2h 0m
2026-04-28 FDX1303 MDT → MEM Apr 28, 03:02 UTCApr 28, 05:07 UTC2h 5m
2026-04-24 FDX1564 MEM → SWF Apr 24, 12:00 UTCApr 24, 12:35 UTC35m
2026-04-24 FDX1564 MEM → SWF Apr 24, 08:20 UTCApr 24, 10:15 UTC1h 55m
2026-04-24 FDX1295 CPR → MEM Apr 24, 02:45 UTCApr 24, 05:15 UTC2h 30m
2026-04-24 FDX1295 CPR → MEM Apr 24, 00:40 UTCApr 24, 01:45 UTC1h 5m
2026-04-23 FDX1495 MEM → BOI Apr 23, 09:15 UTCApr 23, 12:25 UTC3h 10m

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 N677FE page for operator, model, and routing details .

Mode-S A8F63B frequently asked

What is Mode-S code A8F63B?
A8F63B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N677FE.
Where is Mode-S A8F63B registered?
Mode-S code A8F63B 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 A8F63B broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8F63B, octal 52173073, decimal 11,073,083.
What flights does A8F63B operate?
Mode-S A8F63B has broadcast 20 distinct callsigns, including FDX1303, FDX1526, FDX1465, FDX134, FDX1245.