Apparatus

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sensors Mode-S transponder

A28AA4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N263FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A28AA4
Octal
50505244
Decimal
10,652,324
Country
US
Tail
N263FE
Type
B763
No current signal · last broadcast 8h ago
Flights observed
102
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A28AA4.

Country allocation

The ICAO 24-bit address A28AA4 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
FDX1299 FedEx Express 3 2026-05-16
FDX830 FedEx Express 2 2026-04-21
FDX51 FedEx Express 2 2026-05-05
FDX428 FedEx Express 2 2026-04-24
FDX3700 FedEx Express 2 2026-05-27
FDX361 FedEx Express 2 2026-05-20
FDX331 FedEx Express 2 2026-05-12
FDX252 FedEx Express 2 2026-05-05
FDX1879 FedEx Express 2 2026-05-20
FDX1806 FedEx Express 2 2026-05-27
FDX1750 FedEx Express 2 2026-05-28
FDX1732 FedEx Express 2 2026-04-17
FDX1684 FedEx Express 2 2026-05-13
FDX1453 FedEx Express 2 2026-04-15
FDX1446 FedEx Express 2 2026-04-16
FDX1415 FedEx Express 2 2026-04-25
FDX1411 FedEx Express 2 2026-05-14
FDX1404 FedEx Express 2 2026-05-07
FDX1378 FedEx Express 2 2026-05-15
FDX1375 FedEx Express 2 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 FDX1701 IND → ONT Jun 2, 08:50 UTCJun 2, 12:35 UTC3h 45m
2026-06-02 FDX1600 EWR → IND Jun 2, 02:20 UTCJun 2, 03:50 UTC1h 30m
2026-05-31 FDX192 ANC → EWR May 31, 22:10 UTCJun 1, 00:10 UTC2h 0m
2026-05-31 FDX435 OAK → MEM May 31, 11:40 UTCMay 31, 15:05 UTC3h 25m
2026-05-30 FDX3707 IND → OAK May 30, 21:30 UTCMay 31, 01:11 UTC3h 41m
2026-05-30 FDX1574 MEM → IND May 30, 08:25 UTCMay 30, 09:20 UTC55m
2026-05-30 FDX1216 PDX → MEM May 30, 01:40 UTCMay 30, 05:25 UTC3h 45m
2026-05-29 FDX1857 OAK → PDX May 29, 10:20 UTCMay 29, 11:35 UTC1h 15m
2026-05-29 FDX1801 LAX → OAK May 29, 04:45 UTCMay 29, 05:35 UTC50m
2026-05-28 FDX1750 IND → LAX May 28, 08:20 UTCMay 28, 12:10 UTC3h 50m
2026-05-28 FDX1604 PHL → IND May 28, 02:35 UTCMay 28, 04:10 UTC1h 35m
2026-05-27 FDX3700 IND → PHL May 27, 22:15 UTCMay 27, 23:30 UTC1h 15m
2026-05-27 FDX3700 IND → PHL May 27, 22:14 UTCMay 27, 23:30 UTC1h 16m
2026-05-27 FDX3647 OAK → IND May 27, 14:40 UTCMay 27, 18:30 UTC3h 50m
2026-05-27 FDX1806 DFW → OAK May 27, 04:30 UTCMay 27, 07:25 UTC2h 56m
2026-05-26 FDX1136 LRD → AFW May 26, 22:35 UTCMay 26, 22:59 UTC25m
2026-05-22 FDX1155 AFW → IAH May 22, 10:40 UTCMay 22, 11:35 UTC55m
2026-05-22 FDX1155 AFW → IAH May 22, 08:40 UTCMay 22, 09:20 UTC40m
2026-05-22 FDX1100 LAX → AFW May 22, 03:20 UTCMay 22, 05:55 UTC2h 35m
2026-05-21 FDX1750 IND → LAX May 21, 08:10 UTCMay 21, 12:10 UTC4h 0m
2026-05-21 FDX1631 CLE → IND May 21, 02:50 UTCMay 21, 03:40 UTC50m
2026-05-20 FDX361 MEM → PIT May 20, 22:05 UTCMay 20, 23:20 UTC1h 15m
2026-05-20 FDX876 SLC → MEM May 20, 13:15 UTCMay 20, 15:45 UTC2h 30m
2026-05-20 FDX1879 OAK → SLC May 20, 09:36 UTCMay 20, 11:00 UTC1h 24m
2026-05-20 FDX1879 OAK → SLC May 20, 09:40 UTCMay 20, 11:05 UTC1h 25m
2026-05-20 FDX1838 SEA → OAK May 20, 03:40 UTCMay 20, 05:05 UTC1h 26m
2026-05-19 FDX710 MEM → SEA May 19, 21:30 UTCMay 20, 01:30 UTC4h 0m
2026-05-19 FDX878 DEN → MEM May 19, 14:00 UTCMay 19, 15:50 UTC1h 50m
2026-05-19 FDX1728 IND → DEN May 19, 08:50 UTCMay 19, 11:00 UTC2h 10m
2026-05-19 FDX1609 DFW → IND May 19, 04:10 UTCMay 19, 05:50 UTC1h 40m
2026-05-16 FDX1401 MEM → DFW May 16, 09:10 UTCMay 16, 10:16 UTC1h 5m
2026-05-16 FDX1299 IAH → MEM May 16, 03:15 UTCMay 16, 04:15 UTC1h 0m
2026-05-16 FDX1299 IAH → MEM May 16, 03:10 UTCMay 16, 04:17 UTC1h 7m
2026-05-15 FDX1425 MEM → IAH May 15, 08:00 UTCMay 15, 09:05 UTC1h 5m
2026-05-15 FDX1378 BUF → MEM May 15, 01:55 UTCMay 15, 02:55 UTC1h 0m
2026-05-15 FDX1378 BUF → MEM May 15, 01:53 UTCMay 15, 02:54 UTC1h 1m
2026-05-14 FDX1411 MEM → IAH May 14, 11:25 UTCMay 14, 12:05 UTC40m
2026-05-14 FDX1411 MEM → IAH May 14, 09:05 UTCMay 14, 10:05 UTC1h 0m
2026-05-14 FDX1276 JFK → MEM May 14, 03:35 UTCMay 14, 05:40 UTC2h 5m
2026-05-13 FDX1712 IND → JFK May 13, 08:30 UTCMay 13, 10:05 UTC1h 35m
2026-05-13 FDX1684 FLL → IND May 13, 03:05 UTCMay 13, 05:20 UTC2h 15m
2026-05-13 FDX1684 FLL → IND May 13, 03:03 UTCMay 13, 05:15 UTC2h 12m
2026-05-12 FDX331 MEM → FLL May 12, 22:01 UTCMay 12, 23:50 UTC1h 50m
2026-05-12 FDX331 MEM → FLL May 12, 21:55 UTCMay 12, 23:41 UTC1h 46m
2026-05-12 FDX450 PHL → MEM May 12, 12:25 UTCMay 12, 14:25 UTC2h 0m
2026-05-12 FDX1439 MEM → PHL May 12, 08:45 UTCMay 12, 10:30 UTC1h 45m
2026-05-12 FDX1227 AUS → MEM May 12, 02:50 UTCMay 12, 04:05 UTC1h 15m
2026-05-09 FDX1432 MEM → CLT May 9, 09:10 UTCMay 9, 10:35 UTC1h 25m
2026-05-09 FDX1319 MDT → MEM May 9, 04:00 UTCMay 9, 05:05 UTC1h 5m
2026-05-09 FDX1319 MDT → MEM May 9, 03:58 UTCMay 9, 05:04 UTC1h 6m

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 N263FE page for operator, model, and routing details .

Mode-S A28AA4 frequently asked

What is Mode-S code A28AA4?
A28AA4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N263FE.
Where is Mode-S A28AA4 registered?
Mode-S code A28AA4 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 A28AA4 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 A28AA4, octal 50505244, decimal 10,652,324.
What flights does A28AA4 operate?
Mode-S A28AA4 has broadcast 20 distinct callsigns, including FDX1299, FDX830, FDX51, FDX428, FDX3700.