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sensors Mode-S transponder

ACB12D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N917FD · BOEING 757-200 · operated by FEDERAL EXPRESS CORP

Hex
ACB12D
Octal
53130455
Decimal
11,317,549
Country
US
Tail
N917FD
Type
B752
No current signal · last broadcast Jul 25, 11:40 UTC
Flights observed
160
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 11:40 UTC

Last known position

Most recent position reported by Mode-S ACB12D.

Country allocation

The ICAO 24-bit address ACB12D 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
FDX1558 FedEx Express 9 2026-05-29
FDX1777 FedEx Express 7 2026-06-16
FDX1211 - 6 2026-06-17
FDX2619 - 5 2026-07-14
FDX1485 - 5 2026-07-10
FDX1454 - 5 2026-06-27
FDX1408 FedEx Express 5 2026-05-12
FDX1335 FedEx Express 5 2026-04-30
FDX1726 FedEx Express 4 2026-06-23
FDX1667 - 4 2026-07-07
FDX1562 FedEx Express 4 2026-07-23
FDX1521 - 4 2026-07-17
FDX1254 - 4 2026-06-30
FDX1495 FedEx Express 3 2026-05-09
FDX1493 FedEx Express 3 2026-07-25
FDX1474 - 3 2026-06-17
FDX1464 - 3 2026-06-19
FDX1374 FedEx Express 3 2026-07-24
FDX1370 FedEx Express 3 2026-05-13
FDX1332 - 3 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 FDX1493 MEM → RST Jul 25, 09:35 UTCJul 25, 11:05 UTC1h 30m
2026-07-25 FDX1339 SAV → CHA Jul 25, 04:25 UTCJul 25, 05:15 UTC50m
2026-07-25 FDX1339 SAV → CHA Jul 25, 02:45 UTCJul 25, 03:35 UTC50m
2026-07-24 FDX1539 MEM → SAV Jul 24, 09:05 UTCJul 24, 10:10 UTC1h 5m
2026-07-24 FDX1374 LCK → MEM Jul 24, 02:05 UTCJul 24, 03:05 UTC1h 0m
2026-07-23 FDX1562 MEM → HTS Jul 23, 08:35 UTCJul 23, 09:25 UTC50m
2026-07-23 FDX1562 MEM → HTS Jul 23, 08:32 UTCJul 23, 09:29 UTC57m
2026-07-23 FDX1270 LFT → MEM Jul 23, 03:50 UTCJul 23, 04:35 UTC45m
2026-07-22 FDX1441 MEM → LFT Jul 22, 09:34 UTCJul 22, 10:19 UTC45m
2026-07-22 FDX155 MEM → ANC Jul 22, 01:10 UTCJul 22, 03:35 UTC2h 25m
2026-07-21 FDX156 MEM → YOW Jul 21, 09:55 UTCJul 21, 12:00 UTC2h 5m
2026-07-21 FDX1321 EWR → MEM Jul 21, 02:50 UTCJul 21, 04:20 UTC1h 30m
2026-07-17 FDX1521 MEM → FSD Jul 17, 09:04 UTCJul 17, 10:35 UTC1h 30m
2026-07-17 FDX1521 MEM → FSD Jul 17, 09:04 UTCJul 17, 10:32 UTC1h 28m
2026-07-17 FDX1321 FSD → MEM Jul 17, 02:39 UTCJul 17, 04:14 UTC1h 35m
2026-07-16 FDX1521 - Jul 16, 08:55 UTCJul 16, 10:20 UTC1h 25m
2026-07-16 FDX1521 MEM → FSD Jul 16, 08:53 UTCJul 16, 10:18 UTC1h 25m
2026-07-16 FDX1293 - Jul 16, 02:30 UTCJul 16, 04:00 UTC1h 30m
2026-07-15 FDX1493 - Jul 15, 09:15 UTCJul 15, 10:35 UTC1h 20m
2026-07-15 FDX1269 - Jul 15, 02:00 UTCJul 15, 03:30 UTC1h 30m
2026-07-14 FDX1714 - Jul 14, 09:25 UTCJul 14, 10:05 UTC40m
2026-07-14 FDX2619 - Jul 14, 05:30 UTCJul 14, 05:50 UTC20m
2026-07-14 FDX2619 - Jul 14, 03:25 UTCJul 14, 03:55 UTC30m
2026-07-10 FDX1485 - Jul 10, 09:05 UTCJul 10, 09:55 UTC50m
2026-07-10 FDX1485 MEM → TYS Jul 10, 09:04 UTCJul 10, 09:55 UTC51m
2026-07-10 FDX1269 - Jul 10, 02:05 UTCJul 10, 03:45 UTC1h 40m
2026-07-09 FDX1714 - Jul 9, 08:55 UTCJul 9, 09:30 UTC35m
2026-07-09 FDX1661 SLC → IND Jul 9, 01:55 UTCJul 9, 04:40 UTC2h 45m
2026-07-08 FDX1770 - Jul 8, 08:10 UTCJul 8, 11:10 UTC3h 0m
2026-07-07 FDX1667 - Jul 7, 02:45 UTCJul 7, 04:05 UTC1h 20m
2026-07-07 FDX1667 - Jul 7, 00:35 UTCJul 7, 01:05 UTC30m
2026-07-03 FDX1767 - Jul 3, 11:20 UTCJul 3, 11:50 UTC30m
2026-07-03 FDX1767 - Jul 3, 08:30 UTCJul 3, 09:40 UTC1h 10m
2026-07-03 FDX2619 - Jul 3, 03:20 UTCJul 3, 04:05 UTC45m
2026-07-02 FDX1485 - Jul 2, 09:15 UTCJul 2, 10:05 UTC50m
2026-07-02 FDX1485 MEM → TYS Jul 2, 09:12 UTCJul 2, 10:03 UTC51m
2026-07-02 FDX1332 COS → MEM Jul 2, 02:10 UTCJul 2, 04:50 UTC2h 40m
2026-07-01 FDX1487 - Jul 1, 09:15 UTCJul 1, 11:05 UTC1h 50m
2026-07-01 FDX1332 - Jul 1, 04:45 UTCJul 1, 05:45 UTC1h 0m
2026-07-01 FDX1332 - Jul 1, 02:15 UTCJul 1, 03:20 UTC1h 5m
2026-06-30 FDX1487 - Jun 30, 10:05 UTCJun 30, 11:55 UTC1h 50m
2026-06-30 FDX1254 - Jun 30, 00:55 UTCJun 30, 03:15 UTC2h 20m
2026-06-27 FDX1454 - Jun 27, 11:35 UTCJun 27, 11:50 UTC15m
2026-06-27 FDX1454 - Jun 27, 08:29 UTCJun 27, 10:34 UTC2h 5m
2026-06-27 FDX1293 - Jun 27, 02:29 UTCJun 27, 03:55 UTC1h 25m
2026-06-26 FDX1493 - Jun 26, 09:14 UTCJun 26, 10:35 UTC1h 20m
2026-06-26 FDX1296 - Jun 26, 01:50 UTCJun 26, 03:45 UTC1h 55m
2026-06-26 FDX1296 BUF → MEM Jun 26, 01:48 UTCJun 26, 03:44 UTC1h 56m
2026-06-25 FDX1578 - Jun 25, 08:50 UTCJun 25, 10:30 UTC1h 40m
2026-06-25 FDX1374 - Jun 25, 01:59 UTCJun 25, 02:59 UTC1h 0m

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 N917FD page for operator, model, and routing details .

Mode-S ACB12D frequently asked

What is Mode-S code ACB12D?
ACB12D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N917FD.
Where is Mode-S ACB12D registered?
Mode-S code ACB12D 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 ACB12D broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 11:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACB12D, octal 53130455, decimal 11,317,549.
What flights does ACB12D operate?
Mode-S ACB12D has broadcast 20 distinct callsigns, including FDX1558, FDX1777, FDX1211, FDX2619, FDX1485.