Apparatus

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sensors Mode-S transponder

AD23F3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N946FD · BOEING 757-200 · operated by FEDERAL EXPRESS CORP

Hex
AD23F3
Octal
53221763
Decimal
11,346,931
Country
US
Tail
N946FD
Type
B752
No current signal · last broadcast 4d ago
Flights observed
107
Distinct callsigns
20
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S AD23F3.

Country allocation

The ICAO 24-bit address AD23F3 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
FDX1989 FedEx Express 7 2026-06-11
FDX1926 FedEx Express 7 2026-06-12
FDX5504 FedEx Express 6 2026-04-30
FDX5503 FedEx Express 5 2026-04-29
FDX1079 - 5 2026-06-25
FDX1040 - 5 2026-06-25
FDX1269 FedEx Express 4 2026-05-27
FDX1842 - 3 2026-07-08
FDX155 FedEx Express 3 2026-05-01
FDX1469 FedEx Express 3 2026-05-22
FDX1297 - 3 2026-06-26
FDX114 FedEx Express 3 2026-04-29
FDX1901 - 2 2026-06-24
FDX1841 - 2 2026-07-09
FDX1767 FedEx Express 2 2026-05-19
FDX1667 FedEx Express 2 2026-05-20
FDX1615 FedEx Express 2 2026-05-08
FDX1570 FedEx Express 2 2026-05-30
FDX156 FedEx Express 2 2026-04-30
FDX1540 - 2 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 FDX1841 DEN → OAK Jul 9, 04:20 UTCJul 9, 06:30 UTC2h 10m
2026-07-09 FDX1841 OAK → DEN Jul 9, 00:20 UTCJul 9, 02:25 UTC2h 5m
2026-07-08 FDX1842 - Jul 8, 03:40 UTCJul 8, 05:50 UTC2h 10m
2026-07-08 FDX1842 DEN → OAK Jul 8, 03:38 UTCJul 8, 05:48 UTC2h 10m
2026-07-08 FDX1842 PHX → DEN Jul 8, 00:50 UTCJul 8, 02:10 UTC1h 20m
2026-07-03 FDX1592 - Jul 3, 10:00 UTCJul 3, 12:40 UTC2h 40m
2026-07-03 FDX1333 - Jul 3, 03:00 UTCJul 3, 04:00 UTC1h 0m
2026-07-02 FDX1512 MEM → BMI Jul 2, 09:40 UTCJul 2, 10:35 UTC55m
2026-07-02 FDX1294 - Jul 2, 01:20 UTCJul 2, 03:10 UTC1h 50m
2026-07-01 FDX1428 - Jul 1, 08:15 UTCJul 1, 10:15 UTC2h 0m
2026-07-01 FDX1323 - Jul 1, 03:10 UTCJul 1, 04:15 UTC1h 5m
2026-06-30 FDX1474 - Jun 30, 10:10 UTCJun 30, 11:20 UTC1h 10m
2026-06-30 FDX1293 RST → MEM Jun 30, 02:59 UTCJun 30, 04:26 UTC1h 27m
2026-06-30 FDX1293 - Jun 30, 03:00 UTCJun 30, 04:25 UTC1h 25m
2026-06-27 FDX1493 - Jun 27, 09:19 UTCJun 27, 10:40 UTC1h 20m
2026-06-27 FDX1493 MEM → RST Jun 27, 09:14 UTCJun 27, 10:37 UTC1h 23m
2026-06-26 FDX1297 - Jun 26, 02:50 UTCJun 26, 03:45 UTC55m
2026-06-25 FDX1079 - Jun 25, 08:20 UTCJun 25, 09:05 UTC45m
2026-06-25 FDX1079 GSO → ATL Jun 25, 08:18 UTCJun 25, 09:03 UTC45m
2026-06-25 FDX1040 - Jun 25, 02:54 UTCJun 25, 03:54 UTC1h 0m
2026-06-24 FDX1901 IAD → EWR Jun 24, 03:29 UTCJun 24, 04:05 UTC35m
2026-06-23 FDX1540 - Jun 23, 09:29 UTCJun 23, 11:04 UTC1h 35m
2026-06-23 FDX2349 TLH → MEM Jun 23, 03:34 UTCJun 23, 04:29 UTC55m
2026-06-19 FDX1481 - Jun 19, 08:50 UTCJun 19, 09:49 UTC1h 0m
2026-06-19 FDX1297 - Jun 19, 02:54 UTCJun 19, 03:44 UTC50m
2026-06-18 FDX1079 - Jun 18, 08:20 UTCJun 18, 09:05 UTC45m
2026-06-18 FDX1040 - Jun 18, 03:00 UTCJun 18, 04:00 UTC1h 0m
2026-06-17 FDX1073 - Jun 17, 07:50 UTCJun 17, 08:50 UTC1h 0m
2026-06-16 FDX1040 - Jun 16, 02:54 UTCJun 16, 03:55 UTC1h 0m
2026-06-12 FDX1926 BOS → EWR Jun 12, 03:40 UTCJun 12, 04:30 UTC50m
2026-06-12 FDX1926 BOS → EWR Jun 12, 02:45 UTCJun 12, 02:50 UTC5m
2026-06-11 FDX1989 BOS → MDT Jun 11, 08:05 UTCJun 11, 08:45 UTC40m
2026-06-11 FDX1926 BOS → EWR Jun 11, 02:35 UTCJun 11, 03:20 UTC45m
2026-06-10 FDX1989 BOS → MDT Jun 10, 08:10 UTCJun 10, 08:40 UTC30m
2026-06-10 FDX1926 BOS → EWR Jun 10, 02:35 UTCJun 10, 03:20 UTC45m
2026-06-09 FDX1989 BOS → MDT Jun 9, 08:10 UTCJun 9, 08:50 UTC40m
2026-06-09 FDX1926 BOS → EWR Jun 9, 03:10 UTCJun 9, 03:50 UTC40m
2026-06-05 FDX1989 BOS → MDT Jun 5, 08:20 UTCJun 5, 08:50 UTC30m
2026-06-05 FDX1989 BOS → MDT Jun 5, 08:15 UTCJun 5, 08:50 UTC35m
2026-06-05 FDX1926 BOS → EWR Jun 5, 02:30 UTCJun 5, 03:15 UTC45m
2026-06-04 FDX1989 BOS → MDT Jun 4, 08:00 UTCJun 4, 08:40 UTC40m
2026-06-04 FDX1926 BOS → EWR Jun 4, 02:25 UTCJun 4, 03:10 UTC45m
2026-06-03 FDX1989 BOS → MDT Jun 3, 07:55 UTCJun 3, 08:35 UTC40m
2026-06-03 FDX1901 IAD → EWR Jun 3, 03:10 UTCJun 3, 03:45 UTC35m
2026-06-02 FDX1540 MEM → IAD Jun 2, 10:10 UTCJun 2, 11:45 UTC1h 35m
2026-06-02 FDX1347 ALB → MEM Jun 2, 01:50 UTCJun 2, 04:15 UTC2h 25m
2026-05-30 FDX1570 MEM → ALB May 30, 09:00 UTCMay 30, 11:05 UTC2h 5m
2026-05-30 FDX1320 SGF → MEM May 30, 03:15 UTCMay 30, 03:50 UTC35m
2026-05-29 FDX1457 MEM → SGF May 29, 09:40 UTCMay 29, 10:25 UTC45m
2026-05-29 FDX1347 ALB → MEM May 29, 01:55 UTCMay 29, 04:10 UTC2h 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 N946FD page for operator, model, and routing details .

Mode-S AD23F3 frequently asked

What is Mode-S code AD23F3?
AD23F3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N946FD.
Where is Mode-S AD23F3 registered?
Mode-S code AD23F3 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 AD23F3 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD23F3, octal 53221763, decimal 11,346,931.
What flights does AD23F3 operate?
Mode-S AD23F3 has broadcast 20 distinct callsigns, including FDX1989, FDX1926, FDX5504, FDX5503, FDX1079.