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sensors Mode-S transponder

A153C1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N185FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A153C1
Octal
50251701
Decimal
10,572,737
Country
US
Tail
N185FE
Type
B763
No current signal · last broadcast 5h ago
Flights observed
168
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A153C1.

Country allocation

The ICAO 24-bit address A153C1 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
FDX1609 - 4 2026-07-07
FDX1426 - 4 2026-06-26
FDX1344 FedEx Express 4 2026-05-07
FDX434 - 3 2026-06-27
FDX3884 - 3 2026-07-14
FDX1537 - 3 2026-07-17
FDX1414 FedEx Express 3 2026-05-06
FDX1359 FedEx Express 3 2026-05-01
FDX1265 - 3 2026-07-18
FDX1240 FedEx Express 3 2026-07-21
FDX1223 - 3 2026-07-15
FDX1203 FedEx Express 3 2026-06-12
FDX787 FedEx Express 2 2026-06-04
FDX755 - 2 2026-06-30
FDX698 - 2 2026-06-30
FDX64 FedEx Express 2 2026-06-23
FDX63 FedEx Express 2 2026-06-22
FDX3824 - 2 2026-07-14
FDX2681 FedEx Express 2 2026-07-01
FDX251 FedEx Express 2 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 FDX811 - Jul 21, 13:15 UTCJul 21, 14:50 UTC1h 35m
2026-07-21 FDX1542 - Jul 21, 09:30 UTCJul 21, 10:55 UTC1h 25m
2026-07-21 FDX1240 LAS → MEM Jul 21, 02:25 UTCJul 21, 05:30 UTC3h 5m
2026-07-18 FDX1440 - Jul 18, 09:25 UTCJul 18, 12:10 UTC2h 45m
2026-07-18 FDX1265 - Jul 18, 03:25 UTCJul 18, 04:45 UTC1h 20m
2026-07-18 FDX1265 - Jul 18, 01:45 UTCJul 18, 02:25 UTC40m
2026-07-17 FDX1537 - Jul 17, 09:40 UTCJul 17, 11:10 UTC1h 30m
2026-07-16 FDX693 - Jul 16, 12:14 UTCJul 16, 14:05 UTC1h 50m
2026-07-16 FDX1461 - Jul 16, 08:25 UTCJul 16, 10:10 UTC1h 45m
2026-07-16 FDX1240 LAS → MEM Jul 16, 02:16 UTCJul 16, 05:10 UTC2h 54m
2026-07-16 FDX1240 - Jul 16, 02:20 UTCJul 16, 05:05 UTC2h 45m
2026-07-15 FDX1440 - Jul 15, 09:15 UTCJul 15, 12:00 UTC2h 45m
2026-07-15 FDX1223 - Jul 15, 02:00 UTCJul 15, 05:40 UTC3h 40m
2026-07-14 FDX3884 OAK → SEA Jul 14, 22:15 UTCJul 14, 23:35 UTC1h 19m
2026-07-14 FDX3824 SEA → OAK Jul 14, 14:35 UTCJul 14, 16:20 UTC1h 45m
2026-07-14 FDX1717 - Jul 14, 08:45 UTCJul 14, 12:30 UTC3h 45m
2026-07-14 FDX1648 - Jul 14, 02:40 UTCJul 14, 06:15 UTC3h 35m
2026-07-10 FDX1701 IND → ONT Jul 10, 08:15 UTCJul 10, 11:50 UTC3h 35m
2026-07-08 FDX151 YYZ → IND Jul 8, 02:15 UTCJul 8, 03:20 UTC1h 5m
2026-07-07 FDX150 - Jul 7, 08:40 UTCJul 7, 09:40 UTC1h 0m
2026-07-07 FDX1609 DFW → IND Jul 7, 04:30 UTCJul 7, 06:09 UTC1h 39m
2026-07-07 FDX1609 DFW → IND Jul 7, 04:30 UTCJul 7, 06:10 UTC1h 40m
2026-07-03 FDX1723 - Jul 3, 08:20 UTCJul 3, 09:55 UTC1h 35m
2026-07-03 FDX1618 MSP → IND Jul 3, 02:35 UTCJul 3, 04:00 UTC1h 25m
2026-07-02 FDX798 MEM → MSP Jul 2, 21:30 UTCJul 2, 23:20 UTC1h 50m
2026-07-02 FDX1223 SEA → MEM Jul 2, 01:45 UTCJul 2, 05:35 UTC3h 50m
2026-07-02 FDX1223 SEA → MEM Jul 2, 01:45 UTCJul 2, 05:31 UTC3h 46m
2026-07-01 FDX3884 OAK → SEA Jul 1, 21:35 UTCJul 1, 23:09 UTC1h 34m
2026-07-01 FDX3884 OAK → SEA Jul 1, 21:40 UTCJul 1, 23:10 UTC1h 30m
2026-07-01 FDX3824 SEA → OAK Jul 1, 14:25 UTCJul 1, 16:05 UTC1h 40m
2026-07-01 FDX1717 - Jul 1, 08:15 UTCJul 1, 12:10 UTC3h 55m
2026-07-01 FDX2681 MCO → IND Jul 1, 02:05 UTCJul 1, 02:15 UTC10m
2026-07-01 FDX2681 MCO → IND Jul 1, 02:00 UTCJul 1, 03:47 UTC1h 47m
2026-06-30 FDX755 - Jun 30, 21:50 UTCJun 30, 23:25 UTC1h 35m
2026-06-30 FDX755 MEM → MCO Jun 30, 21:46 UTCJun 30, 23:22 UTC1h 36m
2026-06-30 FDX698 - Jun 30, 13:40 UTCJun 30, 16:40 UTC3h 0m
2026-06-30 FDX698 ONT → MEM Jun 30, 13:39 UTCJun 30, 16:40 UTC3h 1m
2026-06-30 FDX1853 OAK → ONT Jun 30, 09:40 UTCJun 30, 10:45 UTC1h 5m
2026-06-30 FDX1838 SEA → OAK Jun 30, 03:50 UTCJun 30, 05:25 UTC1h 35m
2026-06-27 FDX710 - Jun 27, 20:49 UTCJun 28, 00:50 UTC4h 0m
2026-06-27 FDX434 - Jun 27, 12:04 UTCJun 27, 13:30 UTC1h 25m
2026-06-27 FDX434 SAT → MEM Jun 27, 12:02 UTCJun 27, 13:30 UTC1h 28m
2026-06-26 FDX1426 - Jun 26, 09:45 UTCJun 26, 10:10 UTC25m
2026-06-26 FDX1426 - Jun 26, 07:35 UTCJun 26, 08:50 UTC1h 15m
2026-06-26 FDX1227 - Jun 26, 02:44 UTCJun 26, 04:04 UTC1h 20m
2026-06-25 FDX1432 - Jun 25, 08:45 UTCJun 25, 09:55 UTC1h 10m
2026-06-25 FDX131 YMX → MEM Jun 25, 01:35 UTCJun 25, 04:15 UTC2h 40m
2026-06-25 FDX131 - Jun 25, 01:40 UTCJun 25, 04:14 UTC2h 35m
2026-06-24 FDX130 - Jun 24, 08:55 UTCJun 24, 11:05 UTC2h 10m
2026-06-24 FDX1220 - Jun 24, 03:04 UTCJun 24, 04:59 UTC1h 55m

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 N185FE page for operator, model, and routing details .

Mode-S A153C1 frequently asked

What is Mode-S code A153C1?
A153C1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N185FE.
Where is Mode-S A153C1 registered?
Mode-S code A153C1 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 A153C1 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A153C1, octal 50251701, decimal 10,572,737.
What flights does A153C1 operate?
Mode-S A153C1 has broadcast 20 distinct callsigns, including FDX1609, FDX1426, FDX1344, FDX434, FDX3884.