Apparatus

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sensors Mode-S transponder

A12C42

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N175FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A12C42
Octal
50226102
Decimal
10,562,626
Country
US
Tail
N175FE
Type
B763
Broadcasting now · callsign FDX1268 · 37,025 ft
Flights observed
180
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 03:45 UTC

Current position

A12C42 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A12C42 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
FDX1839 - 5 2026-07-11
FDX1453 - 4 2026-06-25
FDX1422 - 4 2026-07-10
FDX1415 FedEx Express 4 2026-07-22
FDX1205 - 4 2026-07-09
FDX1889 FedEx Express 3 2026-04-25
FDX1865 - 3 2026-07-14
FDX1299 - 3 2026-06-17
FDX1213 - 3 2026-06-30
FDX1207 - 3 2026-07-18
FDX886 - 2 2026-07-15
FDX853 FedEx Express 2 2026-04-28
FDX3707 FedEx Express 2 2026-04-18
FDX2681 FedEx Express 2 2026-06-03
FDX242 - 2 2026-07-06
FDX192 FedEx Express 2 2026-05-24
FDX1874 FedEx Express 2 2026-04-21
FDX1835 - 2 2026-07-14
FDX1801 FedEx Express 2 2026-04-25
FDX1759 FedEx Express 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 FDX1358 MSP → MEM Jul 25, 02:25 UTCJul 25, 03:45 UTC1h 20m
2026-07-24 FDX1718 IND → MSP Jul 24, 09:05 UTCJul 24, 10:15 UTC1h 10m
2026-07-24 FDX1627 ORD → IND Jul 24, 04:30 UTCJul 24, 05:00 UTC30m
2026-07-23 FDX1405 MEM → ORD Jul 23, 09:05 UTCJul 23, 10:20 UTC1h 15m
2026-07-23 FDX1216 PDX → MEM Jul 23, 01:40 UTCJul 23, 05:15 UTC3h 35m
2026-07-22 FDX1415 MEM → PDX Jul 22, 10:20 UTCJul 22, 12:45 UTC2h 25m
2026-07-22 FDX1212 MHT → MEM Jul 22, 01:00 UTCJul 22, 03:40 UTC2h 40m
2026-07-21 FDX1412 MEM → MHT Jul 21, 08:40 UTCJul 21, 10:45 UTC2h 5m
2026-07-21 FDX2345 SDF → MEM Jul 21, 03:35 UTCJul 21, 04:35 UTC1h 0m
2026-07-18 FDX1467 - Jul 18, 09:00 UTCJul 18, 09:50 UTC50m
2026-07-18 FDX1207 - Jul 18, 02:00 UTCJul 18, 05:35 UTC3h 36m
2026-07-17 FDX1207 OAK → SJC Jul 17, 23:29 UTCJul 18, 00:00 UTC31m
2026-07-17 FDX1207 OAK → SJC Jul 17, 23:30 UTCJul 17, 23:55 UTC25m
2026-07-17 FDX1419 - Jul 17, 07:50 UTCJul 17, 11:20 UTC3h 30m
2026-07-17 FDX1377 PHL → MEM Jul 17, 01:55 UTCJul 17, 03:50 UTC1h 55m
2026-07-16 FDX1439 - Jul 16, 08:25 UTCJul 16, 10:25 UTC2h 0m
2026-07-15 FDX886 - Jul 15, 13:55 UTCJul 15, 15:45 UTC1h 50m
2026-07-15 FDX886 ELP → MEM Jul 15, 13:44 UTCJul 15, 15:53 UTC2h 9m
2026-07-15 FDX1586 - Jul 15, 09:45 UTCJul 15, 11:25 UTC1h 40m
2026-07-15 FDX1586 MEM → ELP Jul 15, 09:43 UTCJul 15, 11:37 UTC1h 54m
2026-07-15 FDX1262 - Jul 15, 02:45 UTCJul 15, 05:25 UTC2h 40m
2026-07-14 FDX1865 OAK → PHX Jul 14, 09:44 UTCJul 14, 11:10 UTC1h 26m
2026-07-14 FDX1865 OAK → PHX Jul 14, 09:45 UTCJul 14, 11:10 UTC1h 25m
2026-07-14 FDX1835 LAX → OAK Jul 14, 05:15 UTCJul 14, 06:05 UTC50m
2026-07-14 FDX1835 LAX → OAK Jul 14, 05:15 UTCJul 14, 06:04 UTC49m
2026-07-11 FDX1876 - Jul 11, 09:45 UTCJul 11, 10:35 UTC50m
2026-07-11 FDX1839 - Jul 11, 04:45 UTCJul 11, 05:35 UTC50m
2026-07-11 FDX1839 - Jul 11, 03:25 UTCJul 11, 03:45 UTC20m
2026-07-10 FDX1422 - Jul 10, 09:20 UTCJul 10, 12:25 UTC3h 5m
2026-07-10 FDX1292 - Jul 10, 02:55 UTCJul 10, 05:10 UTC2h 15m
2026-07-09 FDX1483 OLV → JFK Jul 9, 08:20 UTCJul 9, 10:20 UTC2h 0m
2026-07-09 FDX1205 - Jul 9, 03:00 UTCJul 9, 04:15 UTC1h 15m
2026-07-09 FDX1205 ORD → MEM Jul 9, 02:56 UTCJul 9, 04:15 UTC1h 19m
2026-07-08 FDX1447 - Jul 8, 08:00 UTCJul 8, 09:15 UTC1h 15m
2026-07-07 FDX139 - Jul 7, 01:30 UTCJul 7, 05:15 UTC3h 45m
2026-07-06 FDX242 - Jul 6, 08:15 UTCJul 6, 12:15 UTC4h 0m
2026-07-06 FDX242 MEM → YVR Jul 6, 08:14 UTCJul 6, 12:11 UTC3h 57m
2026-07-05 FDX418 - Jul 5, 12:20 UTCJul 5, 14:45 UTC2h 25m
2026-07-03 FDX1710 IND → BOS Jul 3, 08:40 UTCJul 3, 10:25 UTC1h 45m
2026-07-03 FDX1601 - Jul 3, 02:45 UTCJul 3, 04:30 UTC1h 45m
2026-07-02 FDX1735 - Jul 2, 07:40 UTCJul 2, 09:20 UTC1h 40m
2026-07-02 FDX1622 - Jul 2, 02:05 UTCJul 2, 02:55 UTC50m
2026-07-01 FDX1446 - Jul 1, 08:30 UTCJul 1, 09:55 UTC1h 25m
2026-07-01 FDX2361 SDF → MEM Jul 1, 04:25 UTCJul 1, 05:15 UTC50m
2026-06-30 FDX722 MEM → SDF Jun 30, 23:05 UTCJun 30, 23:55 UTC50m
2026-06-30 FDX258 - Jun 30, 09:00 UTCJun 30, 21:00 UTC12h 0m
2026-06-30 FDX1213 - Jun 30, 02:00 UTCJun 30, 05:20 UTC3h 20m
2026-06-29 FDX1805 PDX → BUR Jun 29, 21:30 UTCJun 29, 23:14 UTC1h 45m
2026-06-27 FDX1415 - Jun 27, 08:35 UTCJun 27, 12:25 UTC3h 50m
2026-06-27 FDX1205 - Jun 27, 02:29 UTCJun 27, 03:40 UTC1h 10m

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 N175FE page for operator, model, and routing details .

Mode-S A12C42 frequently asked

What is Mode-S code A12C42?
A12C42 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N175FE.
Where is Mode-S A12C42 registered?
Mode-S code A12C42 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 A12C42 broadcasting right now?
Yes. Mode-S A12C42 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12C42, octal 50226102, decimal 10,562,626.
What flights does A12C42 operate?
Mode-S A12C42 has broadcast 20 distinct callsigns, including FDX1839, FDX1453, FDX1422, FDX1415, FDX1205.