Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1211D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N172FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A1211D
Octal
50220435
Decimal
10,559,773
Country
US
Tail
N172FE
Type
B763
No current signal · last broadcast Jul 24, 10:05 UTC
Flights observed
214
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 10:05 UTC

Last known position

Most recent position reported by Mode-S A1211D.

Country allocation

The ICAO 24-bit address A1211D 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
FDX52 - 4 2026-07-01
FDX451 - 4 2026-06-21
FDX251 - 4 2026-06-30
FDX1573 - 4 2026-07-17
FDX1309 - 4 2026-06-13
FDX721 - 3 2026-06-28
FDX420 - 3 2026-06-25
FDX1728 FedEx Express 3 2026-07-21
FDX1723 - 3 2026-07-08
FDX1708 FedEx Express 3 2026-06-12
FDX1628 - 3 2026-07-07
FDX1618 FedEx Express 3 2026-07-21
FDX1609 FedEx Express 3 2026-04-22
FDX1420 FedEx Express 3 2026-06-02
FDX1401 - 3 2026-06-19
FDX139 FedEx Express 3 2026-05-20
FDX1344 - 3 2026-06-16
FDX916 - 2 2026-07-16
FDX855 FedEx Express 2 2026-06-05
FDX853 - 2 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 FDX1732 IND → IAH Jul 24, 08:20 UTCJul 24, 10:05 UTC1h 45m
2026-07-23 FDX3617 SEA → IND Jul 23, 13:20 UTCJul 23, 16:55 UTC3h 35m
2026-07-23 FDX1404 MEM → LAX Jul 23, 07:55 UTCJul 23, 11:05 UTC3h 10m
2026-07-23 FDX1261 MIA → MEM Jul 23, 00:45 UTCJul 23, 02:35 UTC1h 50m
2026-07-22 FDX1650 LAX → IND Jul 22, 02:15 UTCJul 22, 05:25 UTC3h 10m
2026-07-21 FDX1728 IND → DEN Jul 21, 13:15 UTCJul 21, 15:00 UTC1h 45m
2026-07-21 FDX1728 IND → DEN Jul 21, 09:35 UTCJul 21, 11:45 UTC2h 10m
2026-07-21 FDX1618 MSP → IND Jul 21, 02:44 UTCJul 21, 03:50 UTC1h 6m
2026-07-21 FDX1618 MSP → IND Jul 21, 02:45 UTCJul 21, 03:50 UTC1h 5m
2026-07-19 FDX798 MEM → MSP Jul 19, 21:45 UTCJul 19, 23:20 UTC1h 35m
2026-07-19 FDX192 ANC → EWR Jul 19, 05:05 UTCJul 19, 11:10 UTC6h 5m
2026-07-18 FDX20 OAK → ANC Jul 18, 10:20 UTCJul 18, 14:20 UTC4h 0m
2026-07-18 FDX1363 FAT → OAK Jul 18, 00:19 UTCJul 18, 00:45 UTC25m
2026-07-17 FDX1573 - Jul 17, 13:15 UTCJul 17, 13:45 UTC30m
2026-07-17 FDX1573 - Jul 17, 08:35 UTCJul 17, 11:25 UTC2h 50m
2026-07-17 FDX1315 - Jul 17, 02:05 UTCJul 17, 03:59 UTC1h 55m
2026-07-17 FDX1315 ELP → MEM Jul 17, 01:54 UTCJul 17, 03:54 UTC2h 0m
2026-07-16 FDX916 - Jul 16, 21:35 UTCJul 16, 23:20 UTC1h 45m
2026-07-16 FDX916 MEM → ELP Jul 16, 21:30 UTCJul 16, 23:25 UTC1h 55m
2026-07-16 FDX252 - Jul 16, 15:45 UTCJul 16, 17:14 UTC1h 30m
2026-07-16 FDX252 SJU → MEM Jul 16, 13:54 UTCJul 16, 17:37 UTC3h 43m
2026-07-16 FDX51 - Jul 16, 08:35 UTCJul 16, 10:20 UTC1h 45m
2026-07-16 FDX51 MEM → SJU Jul 16, 08:30 UTCJul 16, 12:14 UTC3h 44m
2026-07-16 FDX1312 - Jul 16, 03:00 UTCJul 16, 04:25 UTC1h 25m
2026-07-15 FDX1416 - Jul 15, 08:45 UTCJul 15, 10:10 UTC1h 25m
2026-07-15 FDX1416 MEM → SAT Jul 15, 08:44 UTCJul 15, 10:08 UTC1h 24m
2026-07-15 FDX2284 - Jul 15, 03:15 UTCJul 15, 04:15 UTC1h 0m
2026-07-15 FDX2284 MCI → MEM Jul 15, 03:10 UTCJul 15, 04:13 UTC1h 3m
2026-07-14 FDX1450 - Jul 14, 09:05 UTCJul 14, 09:55 UTC50m
2026-07-14 FDX1216 PDX → MEM Jul 14, 01:40 UTCJul 14, 05:20 UTC3h 40m
2026-07-11 FDX3704 IND → PDX Jul 11, 21:45 UTCJul 12, 01:55 UTC4h 10m
2026-07-10 FDX1610 BOS → IND Jul 10, 02:40 UTCJul 10, 04:35 UTC1h 55m
2026-07-09 FDX3714 - Jul 9, 21:20 UTCJul 9, 23:10 UTC1h 50m
2026-07-09 FDX3648 OAK → IND Jul 9, 12:10 UTCJul 9, 15:40 UTC3h 30m
2026-07-09 FDX1806 DFW → OAK Jul 9, 03:55 UTCJul 9, 07:05 UTC3h 10m
2026-07-08 FDX1723 - Jul 8, 08:45 UTCJul 8, 10:25 UTC1h 40m
2026-07-08 FDX2613 - Jul 8, 03:35 UTCJul 8, 04:45 UTC1h 10m
2026-07-07 FDX1713 - Jul 7, 09:05 UTCJul 7, 10:05 UTC1h 0m
2026-07-07 FDX1628 DEN → IND Jul 7, 03:15 UTCJul 7, 05:20 UTC2h 5m
2026-07-05 FDX529 - Jul 5, 21:55 UTCJul 5, 23:45 UTC1h 50m
2026-07-05 FDX529 MEM → DEN Jul 5, 21:49 UTCJul 5, 23:43 UTC1h 54m
2026-07-04 FDX830 - Jul 4, 11:55 UTCJul 4, 13:25 UTC1h 30m
2026-07-04 FDX830 MCO → MEM Jul 4, 11:54 UTCJul 4, 13:26 UTC1h 32m
2026-07-03 FDX1771 IND → MCO Jul 3, 08:10 UTCJul 3, 09:55 UTC1h 45m
2026-07-03 FDX1612 JFK → IND Jul 3, 03:25 UTCJul 3, 04:50 UTC1h 25m
2026-07-02 FDX764 - Jul 2, 20:45 UTCJul 2, 22:55 UTC2h 10m
2026-07-02 FDX434 - Jul 2, 12:40 UTCJul 2, 14:05 UTC1h 25m
2026-07-02 FDX434 SAT → MEM Jul 2, 12:36 UTCJul 2, 14:05 UTC1h 29m
2026-07-02 FDX1426 - Jul 2, 09:35 UTCJul 2, 09:55 UTC20m
2026-07-02 FDX1426 - Jul 2, 07:35 UTCJul 2, 08:50 UTC1h 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 N172FE page for operator, model, and routing details .

Mode-S A1211D frequently asked

What is Mode-S code A1211D?
A1211D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N172FE.
Where is Mode-S A1211D registered?
Mode-S code A1211D 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 A1211D broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 10:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1211D, octal 50220435, decimal 10,559,773.
What flights does A1211D operate?
Mode-S A1211D has broadcast 20 distinct callsigns, including FDX52, FDX451, FDX251, FDX1573, FDX1309.