Apparatus

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sensors Mode-S transponder

A91DBA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N687FE · AIRBUS A-300-600 · operated by FEDERAL EXPRESS CORP

Hex
A91DBA
Octal
52216672
Decimal
11,083,194
Country
US
Tail
N687FE
Type
A306
Broadcasting now · callsign FDX1459 · 19,550 ft
Flights observed
124
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Current position

A91DBA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A91DBA 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
FDX1105 - 10 2026-07-03
FDX1517 - 7 2026-07-02
FDX1162 - 6 2026-07-03
FDX3608 FedEx Express 5 2026-06-09
FDX1730 FedEx Express 4 2026-06-10
FDX1564 - 4 2026-06-18
FDX1366 FedEx Express 4 2026-05-08
FDX1217 FedEx Express 4 2026-06-11
FDX1489 - 3 2026-06-24
FDX1459 FedEx Express 3 2026-04-30
FDX1433 - 3 2026-06-16
FDX1303 - 3 2026-06-27
FDX2338 FedEx Express 2 2026-06-17
FDX2328 FedEx Express 2 2026-06-30
FDX2266 FedEx Express 2 2026-06-26
FDX1746 FedEx Express 2 2026-04-22
FDX1571 - 2 2026-06-26
FDX1482 FedEx Express 2 2026-05-16
FDX1473 - 2 2026-06-19
FDX1465 - 2 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FDX1350 - Jul 14, 02:15 UTCJul 14, 03:05 UTC50m
2026-07-10 FDX1526 - Jul 10, 09:15 UTCJul 10, 09:55 UTC40m
2026-07-10 FDX1218 - Jul 10, 02:40 UTCJul 10, 04:35 UTC1h 55m
2026-07-09 FDX1418 - Jul 9, 09:10 UTCJul 9, 10:30 UTC1h 20m
2026-07-08 FDX121 YEG → MEM Jul 8, 23:55 UTCJul 9, 03:20 UTC3h 25m
2026-07-08 FDX120 - Jul 8, 09:40 UTCJul 8, 13:10 UTC3h 30m
2026-07-08 FDX121 - Jul 8, 00:15 UTCJul 8, 03:35 UTC3h 20m
2026-07-07 FDX120 - Jul 7, 10:05 UTCJul 7, 13:45 UTC3h 40m
2026-07-07 FDX1267 - Jul 7, 02:45 UTCJul 7, 05:15 UTC2h 30m
2026-07-05 FDX385 - Jul 5, 21:35 UTCJul 5, 23:55 UTC2h 20m
2026-07-03 FDX853 - Jul 3, 12:45 UTCJul 3, 14:35 UTC1h 50m
2026-07-03 FDX1162 - Jul 3, 08:35 UTCJul 3, 10:00 UTC1h 25m
2026-07-03 FDX1162 AFW → DEN Jul 3, 08:31 UTCJul 3, 09:55 UTC1h 24m
2026-07-03 FDX1105 - Jul 3, 03:40 UTCJul 3, 04:25 UTC45m
2026-07-03 FDX1105 - Jul 3, 01:00 UTCJul 3, 01:50 UTC50m
2026-07-02 FDX1517 - Jul 2, 10:10 UTCJul 2, 11:45 UTC1h 35m
2026-07-02 FDX1245 - Jul 2, 02:40 UTCJul 2, 03:45 UTC1h 5m
2026-07-01 FDX1445 - Jul 1, 09:20 UTCJul 1, 10:25 UTC1h 5m
2026-07-01 FDX2237 LCK → MEM Jul 1, 03:20 UTCJul 1, 04:25 UTC1h 5m
2026-06-30 FDX1486 OLV → LCK Jun 30, 09:40 UTCJun 30, 10:50 UTC1h 10m
2026-06-30 FDX2328 ROC → IND Jun 30, 04:30 UTCJun 30, 05:30 UTC1h 0m
2026-06-30 FDX2328 ROC → IND Jun 30, 01:40 UTCJun 30, 02:55 UTC1h 15m
2026-06-27 FDX1528 - Jun 27, 09:00 UTCJun 27, 10:45 UTC1h 45m
2026-06-27 FDX1303 - Jun 27, 02:04 UTCJun 27, 04:05 UTC2h 0m
2026-06-26 FDX1571 - Jun 26, 09:20 UTCJun 26, 11:00 UTC1h 40m
2026-06-26 FDX2266 RSW → MEM Jun 26, 01:05 UTCJun 26, 02:44 UTC1h 40m
2026-06-25 FDX1465 - Jun 25, 08:20 UTCJun 25, 09:55 UTC1h 35m
2026-06-25 FDX1289 - Jun 25, 02:05 UTCJun 25, 04:14 UTC2h 10m
2026-06-24 FDX1489 - Jun 24, 08:49 UTCJun 24, 10:39 UTC1h 50m
2026-06-24 FDX2266 RSW → MEM Jun 24, 01:09 UTCJun 24, 02:49 UTC1h 40m
2026-06-23 FDX1465 - Jun 23, 08:39 UTCJun 23, 10:19 UTC1h 40m
2026-06-23 FDX1206 - Jun 23, 00:39 UTCJun 23, 03:25 UTC2h 45m
2026-06-19 FDX1473 - Jun 19, 08:40 UTCJun 19, 10:44 UTC2h 5m
2026-06-19 FDX1303 - Jun 19, 02:04 UTCJun 19, 03:55 UTC1h 50m
2026-06-18 FDX1564 - Jun 18, 12:05 UTCJun 18, 12:45 UTC40m
2026-06-18 FDX1564 - Jun 18, 08:50 UTCJun 18, 10:55 UTC2h 5m
2026-06-18 FDX1206 - Jun 18, 01:10 UTCJun 18, 04:00 UTC2h 50m
2026-06-17 FDX1473 - Jun 17, 09:20 UTCJun 17, 11:35 UTC2h 15m
2026-06-17 FDX2338 ORF → MEM Jun 17, 01:35 UTCJun 17, 03:40 UTC2h 5m
2026-06-17 FDX2338 ORF → MEM Jun 17, 01:34 UTCJun 17, 03:39 UTC2h 5m
2026-06-16 FDX1433 - Jun 16, 09:10 UTCJun 16, 10:35 UTC1h 25m
2026-06-16 FDX1303 - Jun 16, 02:15 UTCJun 16, 04:10 UTC1h 55m
2026-06-12 FDX1564 MEM → SWF Jun 12, 14:20 UTCJun 12, 14:50 UTC30m
2026-06-12 FDX1564 MEM → SWF Jun 12, 09:25 UTCJun 12, 11:25 UTC2h 0m
2026-06-12 FDX1251 OMA → MEM Jun 12, 02:55 UTCJun 12, 04:10 UTC1h 15m
2026-06-11 FDX336 - Jun 11, 21:25 UTCJun 11, 23:05 UTC1h 40m
2026-06-11 FDX1217 BWI → MEM Jun 11, 02:35 UTCJun 11, 04:35 UTC2h 0m
2026-06-10 FDX1730 IND → BWI Jun 10, 08:55 UTCJun 10, 10:10 UTC1h 15m
2026-06-09 FDX3608 DEN → IND Jun 9, 13:15 UTCJun 9, 15:15 UTC2h 0m
2026-06-09 FDX1162 AFW → DEN Jun 9, 08:35 UTCJun 9, 10:05 UTC1h 30m

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 N687FE page for operator, model, and routing details .

Mode-S A91DBA frequently asked

What is Mode-S code A91DBA?
A91DBA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N687FE.
Where is Mode-S A91DBA registered?
Mode-S code A91DBA 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 A91DBA broadcasting right now?
Yes. Mode-S A91DBA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91DBA, octal 52216672, decimal 11,083,194.
What flights does A91DBA operate?
Mode-S A91DBA has broadcast 20 distinct callsigns, including FDX1105, FDX1517, FDX1162, FDX3608, FDX1730.