Apparatus

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sensors Mode-S transponder

AC638D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N898FD · BOEING 777-200LR · operated by FEDERAL EXPRESS CORP

Hex
AC638D
Octal
53061615
Decimal
11,297,677
Country
US
Tail
N898FD
Type
B77L
Broadcasting now · callsign FDX5262 · 35,000 ft
Flights observed
206
Distinct callsigns
20
Country
US
Last broadcast
18m ago

Current position

AC638D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC638D 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
FDX60 - 12 2026-06-25
FDX6030 - 9 2026-06-26
FDX5388 FedEx Express 9 2026-06-08
FDX5217 FedEx Express 8 2026-04-17
FDX5030 FedEx Express 8 2026-06-05
FDX6017 FedEx Express 6 2026-04-14
FDX85 FedEx Express 5 2026-06-19
FDX5279 - 5 2026-07-11
FDX15 - 5 2026-07-12
FDX9005 - 4 2026-06-22
FDX7 FedEx Express 4 2026-04-21
FDX5991 FedEx Express 4 2026-05-13
FDX5487 FedEx Express 4 2026-04-18
FDX5319 FedEx Express 4 2026-06-13
FDX10 FedEx Express 4 2026-05-18
FDX97 FedEx Express 3 2026-06-06
FDX9007 FedEx Express 3 2026-06-23
FDX9004 - 3 2026-06-21
FDX8 FedEx Express 3 2026-04-21
FDX554 FedEx Express 3 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 FDX5262 - Jul 13, 17:30 UTCJul 14, 05:15 UTC11h 45m
2026-07-13 FDX5260 - Jul 13, 14:00 UTCJul 13, 14:55 UTC55m
2026-07-12 FDX15 ANC → NRT Jul 12, 19:23 UTCJul 13, 02:09 UTC6h 46m
2026-07-12 FDX15 - Jul 12, 19:25 UTCJul 13, 02:25 UTC7h 0m
2026-07-12 FDX15 - Jul 12, 08:40 UTCJul 12, 14:45 UTC6h 5m
2026-07-11 FDX5035 - Jul 11, 20:40 UTCJul 12, 05:30 UTC8h 50m
2026-07-11 FDX5279 - Jul 11, 11:25 UTCJul 11, 14:35 UTC3h 10m
2026-07-11 FDX5279 - Jul 11, 04:30 UTCJul 11, 10:55 UTC6h 25m
2026-07-10 FDX5279 - Jul 10, 23:20 UTCJul 11, 02:00 UTC2h 40m
2026-06-27 FDX6031 ANC → CAN Jun 27, 07:10 UTCJun 27, 15:14 UTC8h 5m
2026-06-26 FDX9162 - Jun 26, 20:24 UTCJun 27, 02:25 UTC6h 0m
2026-06-26 FDX5163 - Jun 26, 10:44 UTCJun 26, 16:44 UTC6h 0m
2026-06-26 FDX5163 ANC → MEM Jun 26, 10:45 UTCJun 26, 16:44 UTC5h 59m
2026-06-26 FDX6030 - Jun 26, 02:20 UTCJun 26, 08:40 UTC6h 20m
2026-06-25 FDX60 - Jun 25, 16:29 UTCJun 25, 22:39 UTC6h 10m
2026-06-25 FDX60 - Jun 25, 13:29 UTCJun 25, 14:39 UTC1h 10m
2026-06-24 FDX60 KIX → NRT Jun 24, 16:34 UTCJun 24, 23:00 UTC6h 25m
2026-06-24 FDX9009 ANC → NRT Jun 24, 04:24 UTCJun 24, 11:24 UTC7h 0m
2026-06-23 FDX9009 - Jun 23, 21:20 UTCJun 24, 02:54 UTC5h 35m
2026-06-23 FDX9007 LGG → IND Jun 23, 13:34 UTCJun 23, 18:53 UTC5h 19m
2026-06-23 FDX9007 LGG → IND Jun 23, 13:34 UTCJun 23, 14:59 UTC1h 25m
2026-06-23 FDX9007 LGG → IND Jun 23, 01:35 UTCJun 23, 12:05 UTC10h 30m
2026-06-22 FDX9005 - Jun 22, 10:49 UTCJun 22, 22:34 UTC11h 45m
2026-06-22 FDX9005 - Jun 22, 03:54 UTCJun 22, 04:00 UTC5m
2026-06-21 FDX9005 - Jun 21, 21:19 UTCJun 22, 04:00 UTC6h 40m
2026-06-21 FDX9005 DFW → ANC Jun 21, 21:15 UTCJun 22, 03:36 UTC6h 21m
2026-06-21 FDX9004 ANC → DFW Jun 21, 10:25 UTCJun 21, 15:59 UTC5h 35m
2026-06-20 FDX9004 - Jun 20, 20:34 UTCJun 21, 09:04 UTC12h 30m
2026-06-20 FDX9004 - Jun 20, 11:05 UTCJun 20, 17:19 UTC6h 15m
2026-06-19 FDX85 OAK → ANC Jun 19, 20:09 UTCJun 20, 02:49 UTC6h 40m
2026-06-19 FDX85 OAK → ANC Jun 19, 08:15 UTCJun 19, 14:33 UTC6h 18m
2026-06-19 FDX85 OAK → ANC Jun 19, 08:20 UTCJun 19, 14:29 UTC6h 10m
2026-06-19 FDX5601 - Jun 19, 00:14 UTCJun 19, 05:40 UTC5h 25m
2026-06-18 FDX5601 - Jun 18, 11:00 UTCJun 18, 22:05 UTC11h 5m
2026-06-17 FDX5313 MEM → ANC Jun 17, 17:24 UTCJun 18, 06:20 UTC12h 56m
2026-06-17 FDX5313 MEM → ANC Jun 17, 17:25 UTCJun 18, 04:45 UTC11h 20m
2026-06-17 FDX5313 MEM → ANC Jun 17, 09:20 UTCJun 17, 15:30 UTC6h 10m
2026-06-15 FDX5225 - Jun 15, 19:05 UTCJun 16, 04:15 UTC9h 10m
2026-06-15 FDX5038 - Jun 15, 08:10 UTCJun 15, 16:19 UTC8h 10m
2026-06-15 FDX5038 MEM → CGN Jun 15, 08:07 UTCJun 15, 16:16 UTC8h 9m
2026-06-13 FDX5210 DUB → STN Jun 13, 17:00 UTCJun 14, 11:00 UTC18h 0m
2026-06-13 FDX5319 OAK → NRT Jun 13, 08:20 UTCJun 13, 14:50 UTC6h 30m
2026-06-12 FDX5319 OAK → NRT Jun 12, 19:10 UTCJun 13, 02:45 UTC7h 35m
2026-06-12 FDX5319 OAK → NRT Jun 12, 09:00 UTCJun 12, 14:55 UTC5h 55m
2026-06-12 FDX5319 OAK → NRT Jun 12, 08:58 UTCJun 12, 14:51 UTC5h 53m
2026-06-12 FDX1621 EWR → IND Jun 12, 04:55 UTCJun 12, 06:20 UTC1h 25m
2026-06-12 FDX1621 EWR → IND Jun 12, 04:55 UTCJun 12, 06:22 UTC1h 27m
2026-06-11 FDX554 MEM → BOS Jun 11, 22:20 UTCJun 12, 00:35 UTC2h 15m
2026-06-11 FDX411 OAK → MEM Jun 11, 13:20 UTCJun 11, 16:35 UTC3h 15m
2026-06-11 FDX3815 HNL → OAK Jun 11, 04:20 UTCJun 11, 08:40 UTC4h 20m

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 N898FD page for operator, model, and routing details .

Mode-S AC638D frequently asked

What is Mode-S code AC638D?
AC638D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N898FD.
Where is Mode-S AC638D registered?
Mode-S code AC638D 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 AC638D broadcasting right now?
Yes. Mode-S AC638D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC638D, octal 53061615, decimal 11,297,677.
What flights does AC638D operate?
Mode-S AC638D has broadcast 20 distinct callsigns, including FDX60, FDX6030, FDX5388, FDX5217, FDX5030.