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sensors Mode-S transponder

ADC1EF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N986FD · BOEING 757-200 · operated by FEDERAL EXPRESS CORP

Hex
ADC1EF
Octal
53340757
Decimal
11,387,375
Country
US
Tail
N986FD
Type
B752
No current signal · last broadcast 4d ago
Flights observed
123
Distinct callsigns
20
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S ADC1EF.

Country allocation

The ICAO 24-bit address ADC1EF 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
FDX1582 FedEx Express 6 2026-05-19
FDX1329 - 5 2026-06-27
FDX1643 FedEx Express 4 2026-06-12
FDX1702 FedEx Express 3 2026-06-11
FDX1539 - 3 2026-06-30
FDX1488 FedEx Express 3 2026-05-02
FDX1441 - 3 2026-07-07
FDX1409 - 3 2026-06-24
FDX1347 - 3 2026-06-24
FDX1291 - 3 2026-07-02
FDX1270 - 3 2026-07-08
FDX1211 - 3 2026-06-20
FDX365 FedEx Express 2 2026-05-19
FDX1777 - 2 2026-06-19
FDX1767 - 2 2026-06-18
FDX1757 FedEx Express 2 2026-05-29
FDX1667 - 2 2026-06-19
FDX1570 - 2 2026-06-23
FDX1562 FedEx Express 2 2026-04-23
FDX1544 - 2 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 FDX1606 - Jul 10, 02:25 UTCJul 10, 03:05 UTC40m
2026-07-09 FDX1469 - Jul 9, 09:00 UTCJul 9, 10:25 UTC1h 25m
2026-07-09 FDX1320 - Jul 9, 03:05 UTCJul 9, 03:45 UTC40m
2026-07-08 FDX1457 - Jul 8, 09:40 UTCJul 8, 10:20 UTC40m
2026-07-08 FDX1270 - Jul 8, 03:35 UTCJul 8, 04:25 UTC50m
2026-07-07 FDX1441 - Jul 7, 09:15 UTCJul 7, 09:55 UTC40m
2026-07-07 FDX1270 - Jul 7, 03:45 UTCJul 7, 04:40 UTC55m
2026-07-03 FDX1441 MEM → LFT Jul 3, 08:51 UTCJul 3, 09:40 UTC49m
2026-07-03 FDX1231 - Jul 3, 01:55 UTCJul 3, 04:00 UTC2h 5m
2026-07-02 FDX1544 - Jul 2, 09:55 UTCJul 2, 11:45 UTC1h 50m
2026-07-02 FDX1291 - Jul 2, 01:20 UTCJul 2, 03:45 UTC2h 25m
2026-07-01 FDX1491 - Jul 1, 08:35 UTCJul 1, 10:50 UTC2h 15m
2026-07-01 FDX1339 - Jul 1, 02:20 UTCJul 1, 03:35 UTC1h 15m
2026-06-30 FDX1539 - Jun 30, 09:55 UTCJun 30, 11:05 UTC1h 10m
2026-06-30 FDX2356 MCI → MEM Jun 30, 02:35 UTCJun 30, 03:35 UTC1h 0m
2026-06-27 FDX1329 - Jun 27, 02:45 UTCJun 27, 04:09 UTC1h 25m
2026-06-27 FDX1329 ATW → FSD Jun 27, 01:00 UTCJun 27, 01:54 UTC55m
2026-06-26 FDX1477 - Jun 26, 09:45 UTCJun 26, 11:05 UTC1h 20m
2026-06-26 FDX1362 - Jun 26, 01:39 UTCJun 26, 03:05 UTC1h 25m
2026-06-25 FDX1451 - Jun 25, 09:29 UTCJun 25, 10:45 UTC1h 15m
2026-06-25 FDX2278 MCO → MEM Jun 25, 00:59 UTCJun 25, 02:30 UTC1h 30m
2026-06-24 FDX1409 - Jun 24, 07:44 UTCJun 24, 09:05 UTC1h 20m
2026-06-24 FDX1347 - Jun 24, 01:49 UTCJun 24, 04:05 UTC2h 15m
2026-06-23 FDX1570 - Jun 23, 08:50 UTCJun 23, 10:39 UTC1h 50m
2026-06-23 FDX1295 - Jun 23, 03:04 UTCJun 23, 05:09 UTC2h 5m
2026-06-23 FDX1295 - Jun 23, 00:45 UTCJun 23, 01:45 UTC1h 0m
2026-06-20 FDX1495 - Jun 20, 11:59 UTCJun 20, 13:09 UTC1h 10m
2026-06-20 FDX1495 - Jun 20, 08:59 UTCJun 20, 11:14 UTC2h 15m
2026-06-20 FDX1211 CID → MEM Jun 20, 03:15 UTCJun 20, 04:28 UTC1h 13m
2026-06-20 FDX1211 - Jun 20, 03:19 UTCJun 20, 04:24 UTC1h 5m
2026-06-20 FDX1211 - Jun 20, 02:00 UTCJun 20, 02:19 UTC20m
2026-06-19 FDX1777 - Jun 19, 10:09 UTCJun 19, 10:29 UTC20m
2026-06-19 FDX1777 - Jun 19, 08:24 UTCJun 19, 09:14 UTC50m
2026-06-19 FDX1667 - Jun 19, 02:24 UTCJun 19, 04:00 UTC1h 35m
2026-06-19 FDX1667 - Jun 19, 00:14 UTCJun 19, 00:45 UTC30m
2026-06-18 FDX1767 - Jun 18, 12:10 UTCJun 18, 12:40 UTC30m
2026-06-18 FDX1767 - Jun 18, 09:25 UTCJun 18, 10:30 UTC1h 5m
2026-06-12 FDX1643 GRR → IND Jun 12, 03:55 UTCJun 12, 04:40 UTC45m
2026-06-11 FDX1702 IND → ATL Jun 11, 08:55 UTCJun 11, 09:30 UTC35m
2026-06-11 FDX1662 JAX → IND Jun 11, 02:15 UTCJun 11, 03:50 UTC1h 35m
2026-06-10 FDX1727 IND → ORD Jun 10, 08:15 UTCJun 10, 09:40 UTC1h 25m
2026-06-04 FDX1643 GRR → IND Jun 4, 03:10 UTCJun 4, 03:55 UTC45m
2026-06-03 FDX1702 IND → ATL Jun 3, 08:45 UTCJun 3, 09:25 UTC40m
2026-06-03 FDX1643 GRR → IND Jun 3, 03:30 UTCJun 3, 04:10 UTC40m
2026-06-03 FDX1643 GRR → IND Jun 3, 03:25 UTCJun 3, 04:06 UTC41m
2026-06-02 FDX1702 IND → ATL Jun 2, 09:05 UTCJun 2, 09:45 UTC40m
2026-06-02 FDX2640 BNA → IND Jun 2, 02:55 UTCJun 2, 03:40 UTC45m
2026-05-29 FDX1757 MSY → ATL May 29, 11:25 UTCMay 29, 12:25 UTC1h 0m
2026-05-29 FDX1757 MSY → ATL May 29, 08:30 UTCMay 29, 10:05 UTC1h 35m
2026-05-28 FDX1061 GSO → ORD May 28, 10:55 UTCMay 28, 11:30 UTC35m

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 N986FD page for operator, model, and routing details .

Mode-S ADC1EF frequently asked

What is Mode-S code ADC1EF?
ADC1EF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N986FD.
Where is Mode-S ADC1EF registered?
Mode-S code ADC1EF 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 ADC1EF 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 ADC1EF, octal 53340757, decimal 11,387,375.
What flights does ADC1EF operate?
Mode-S ADC1EF has broadcast 20 distinct callsigns, including FDX1582, FDX1329, FDX1643, FDX1702, FDX1539.