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sensors Mode-S transponder

A8741C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N644AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A8741C
Octal
52072034
Decimal
11,039,772
Country
US
Tail
N644AE
Type
E145
No current signal · last broadcast 3h ago
Flights observed
721
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A8741C.

Country allocation

The ICAO 24-bit address A8741C 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
PDT5958 - 17 2026-06-19
PDT6032 - 12 2026-07-11
PDT6012 Piedmont Airlines 10 2026-06-19
PDT5925 - 10 2026-06-19
PDT5840 - 10 2026-06-19
PDT6068 - 9 2026-06-26
PDT6042 - 8 2026-07-10
PDT6005 Piedmont Airlines 8 2026-05-07
PDT5942 - 8 2026-06-19
PDT5845 - 8 2026-06-21
PDT6092 Piedmont Airlines 7 2026-06-13
PDT6044 - 7 2026-07-03
PDT6030 Piedmont Airlines 7 2026-05-10
PDT6015 Piedmont Airlines 7 2026-06-06
PDT5894 - 7 2026-06-14
PDT6132 - 6 2026-06-18
PDT6075 - 6 2026-06-28
PDT6052 - 6 2026-06-25
PDT6041 Piedmont Airlines 6 2026-06-14
PDT6038 - 6 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT5807 - Jul 14, 21:40 UTCJul 14, 22:45 UTC1h 4m
2026-07-14 PDT5807 - Jul 14, 19:55 UTCJul 14, 20:50 UTC55m
2026-07-14 PDT6053 - Jul 14, 17:40 UTCJul 14, 18:20 UTC40m
2026-07-14 PDT6053 - Jul 14, 16:00 UTCJul 14, 16:35 UTC35m
2026-07-14 PDT5878 - Jul 14, 13:40 UTCJul 14, 14:05 UTC25m
2026-07-14 PDT5878 MYR → CLT Jul 14, 13:31 UTCJul 14, 14:06 UTC35m
2026-07-14 PDT5878 - Jul 14, 12:00 UTCJul 14, 12:25 UTC25m
2026-07-14 PDT6006 - Jul 14, 10:15 UTCJul 14, 10:50 UTC35m
2026-07-14 PDT5986 - Jul 14, 03:10 UTCJul 14, 03:40 UTC30m
2026-07-14 PDT5986 CLT → PGV Jul 14, 03:07 UTCJul 14, 03:44 UTC37m
2026-07-14 PDT6043 - Jul 14, 00:55 UTCJul 14, 01:10 UTC15m
2026-07-13 PDT6043 - Jul 13, 23:45 UTCJul 14, 00:00 UTC15m
2026-07-13 PDT6051 - Jul 13, 20:55 UTCJul 13, 21:50 UTC55m
2026-07-13 PDT6051 CHA → CLT Jul 13, 20:51 UTCJul 13, 21:49 UTC58m
2026-07-13 PDT6051 - Jul 13, 19:15 UTCJul 13, 19:55 UTC40m
2026-07-13 PDT5810 - Jul 13, 16:25 UTCJul 13, 17:25 UTC1h 0m
2026-07-13 PDT5810 - Jul 13, 14:25 UTCJul 13, 15:20 UTC55m
2026-07-13 PDT5897 - Jul 13, 12:00 UTCJul 13, 13:00 UTC1h 0m
2026-07-13 PDT5860 - Jul 13, 01:25 UTCJul 13, 02:25 UTC1h 0m
2026-07-12 PDT5807 - Jul 12, 22:10 UTCJul 12, 23:05 UTC55m
2026-07-12 PDT5807 - Jul 12, 20:05 UTCJul 12, 21:05 UTC1h 0m
2026-07-12 PDT5810 - Jul 12, 16:25 UTCJul 12, 17:25 UTC1h 0m
2026-07-12 PDT5810 - Jul 12, 14:40 UTCJul 12, 15:35 UTC55m
2026-07-12 PDT6089 - Jul 12, 12:20 UTCJul 12, 13:25 UTC1h 5m
2026-07-12 PDT6089 GNV → CLT Jul 12, 12:19 UTCJul 12, 13:24 UTC1h 5m
2026-07-12 PDT6079 - Jul 12, 03:15 UTCJul 12, 04:15 UTC1h 0m
2026-07-12 PDT6079 CLT → GNV Jul 12, 03:12 UTCJul 12, 04:11 UTC59m
2026-07-12 PDT5927 - Jul 12, 00:25 UTCJul 12, 01:30 UTC1h 5m
2026-07-11 PDT5927 - Jul 11, 22:15 UTCJul 11, 23:15 UTC1h 0m
2026-07-11 PDT5935 - Jul 11, 18:45 UTCJul 11, 20:20 UTC1h 35m
2026-07-11 PDT5935 SGF → CLT Jul 11, 18:44 UTCJul 11, 20:32 UTC1h 48m
2026-07-11 PDT5935 - Jul 11, 15:50 UTCJul 11, 17:35 UTC1h 45m
2026-07-11 PDT6105 - Jul 11, 13:30 UTCJul 11, 14:10 UTC40m
2026-07-11 PDT6105 CHA → CLT Jul 11, 13:25 UTCJul 11, 14:15 UTC50m
2026-07-11 PDT5787 - Jul 11, 12:00 UTCJul 11, 12:40 UTC40m
2026-07-11 PDT5855 - Jul 11, 09:30 UTCJul 11, 09:50 UTC20m
2026-07-11 PDT5815 - Jul 11, 02:00 UTCJul 11, 02:20 UTC20m
2026-07-11 PDT6032 - Jul 11, 00:20 UTCJul 11, 00:45 UTC25m
2026-07-10 PDT6032 - Jul 10, 23:00 UTCJul 10, 23:20 UTC20m
2026-07-10 PDT6110 - Jul 10, 20:55 UTCJul 10, 21:35 UTC40m
2026-07-10 PDT6110 - Jul 10, 17:35 UTCJul 10, 18:05 UTC30m
2026-07-10 PDT6042 - Jul 10, 15:30 UTCJul 10, 15:55 UTC25m
2026-07-10 PDT6042 - Jul 10, 14:15 UTCJul 10, 14:30 UTC15m
2026-07-10 PDT5992 - Jul 10, 10:55 UTCJul 10, 11:20 UTC25m
2026-07-10 PDT5912 - Jul 10, 01:15 UTCJul 10, 01:35 UTC20m
2026-07-10 PDT5912 CLT → TRI Jul 10, 01:11 UTCJul 10, 01:40 UTC29m
2026-07-09 PDT6078 - Jul 9, 22:35 UTCJul 9, 23:35 UTC1h 0m
2026-07-09 PDT6078 - Jul 9, 20:10 UTCJul 9, 21:15 UTC1h 5m
2026-07-05 PDT6104 - Jul 5, 09:05 UTCJul 5, 09:50 UTC45m
2026-07-04 PDT6070 PHL → ROA Jul 4, 20:36 UTCJul 4, 21:16 UTC40m

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 N644AE page for operator, model, and routing details .

Mode-S A8741C frequently asked

What is Mode-S code A8741C?
A8741C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N644AE.
Where is Mode-S A8741C registered?
Mode-S code A8741C 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 A8741C broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8741C, octal 52072034, decimal 11,039,772.
What flights does A8741C operate?
Mode-S A8741C has broadcast 20 distinct callsigns, including PDT5958, PDT6032, PDT6012, PDT5925, PDT5840.