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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 Jul 26, 21:30 UTC
Flights observed
825
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

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
PDT6068 - 11 2026-07-15
PDT6042 Piedmont Airlines 10 2026-07-22
PDT6012 Piedmont Airlines 10 2026-06-19
PDT5925 - 10 2026-06-19
PDT5840 - 10 2026-06-19
PDT6080 Piedmont Airlines 9 2026-07-23
PDT6005 Piedmont Airlines 9 2026-07-19
PDT6024 Piedmont Airlines 8 2026-07-24
PDT5964 Piedmont Airlines 8 2026-07-25
PDT5942 - 8 2026-06-19
PDT5868 Piedmont Airlines 8 2026-07-22
PDT5845 - 8 2026-06-21
PDT6092 Piedmont Airlines 7 2026-06-13
PDT6047 - 7 2026-07-15
PDT6044 - 7 2026-07-03
PDT6030 Piedmont Airlines 7 2026-05-10
PDT6015 Piedmont Airlines 7 2026-06-06
PDT5938 Piedmont Airlines 7 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PDT6131 MDT → PHL Jul 26, 21:10 UTCJul 26, 21:30 UTC20m
2026-07-26 PDT6131 MDT → PHL Jul 26, 19:40 UTCJul 26, 20:20 UTC40m
2026-07-26 PDT5956 PHL → ROA Jul 26, 17:20 UTCJul 26, 18:20 UTC1h 0m
2026-07-26 PDT5956 PHL → ROA Jul 26, 15:35 UTCJul 26, 16:25 UTC50m
2026-07-26 PDT5852 CLT → PHF Jul 26, 13:20 UTCJul 26, 14:00 UTC40m
2026-07-26 PDT5852 CLT → PHF Jul 26, 11:30 UTCJul 26, 11:55 UTC25m
2026-07-26 PDT5985 PHL → BUF Jul 26, 09:05 UTCJul 26, 10:05 UTC1h 0m
2026-07-26 PDT5985 PHL → BUF Jul 26, 09:05 UTCJul 26, 10:02 UTC57m
2026-07-26 PDT5938 ORF → PHL Jul 26, 02:50 UTCJul 26, 03:35 UTC45m
2026-07-26 PDT5938 ORF → PHL Jul 26, 02:45 UTCJul 26, 03:31 UTC46m
2026-07-26 PDT6055 PHL → ALB Jul 26, 00:15 UTCJul 26, 00:50 UTC35m
2026-07-25 PDT6055 PHL → ALB Jul 25, 22:25 UTCJul 25, 23:00 UTC35m
2026-07-25 PDT5852 CLT → PHF Jul 25, 20:35 UTCJul 25, 21:15 UTC40m
2026-07-25 PDT5830 RIC → PHL Jul 25, 18:20 UTCJul 25, 19:30 UTC1h 10m
2026-07-25 PDT5830 RIC → PHL Jul 25, 16:20 UTCJul 25, 16:55 UTC35m
2026-07-25 PDT5964 MHT → PHL Jul 25, 01:13 UTCJul 25, 01:52 UTC39m
2026-07-25 PDT5964 MHT → PHL Jul 25, 01:15 UTCJul 25, 01:55 UTC40m
2026-07-24 PDT6024 BOS → ROC Jul 24, 22:55 UTCJul 24, 23:35 UTC40m
2026-07-24 PDT6024 BOS → ROC Jul 24, 22:53 UTCJul 24, 23:40 UTC47m
2026-07-24 PDT6024 BOS → ROC Jul 24, 21:35 UTCJul 24, 22:15 UTC40m
2026-07-24 PDT5843 TYS → PHL Jul 24, 19:55 UTCJul 24, 20:35 UTC40m
2026-07-24 PDT5843 TYS → PHL Jul 24, 19:51 UTCJul 24, 20:34 UTC43m
2026-07-24 PDT5843 TYS → PHL Jul 24, 18:30 UTCJul 24, 19:10 UTC40m
2026-07-24 PDT5848 CHO → CLT Jul 24, 15:45 UTCJul 24, 16:50 UTC1h 5m
2026-07-24 PDT5848 CHO → CLT Jul 24, 13:30 UTCJul 24, 14:30 UTC1h 0m
2026-07-24 PDT6111 GSP → PHL Jul 24, 10:25 UTCJul 24, 11:20 UTC55m
2026-07-24 PDT6107 PHL → ALB Jul 24, 01:30 UTCJul 24, 02:05 UTC35m
2026-07-24 PDT6107 PHL → ALB Jul 24, 01:25 UTCJul 24, 02:03 UTC38m
2026-07-24 PDT5965 PHL → SAV Jul 24, 00:10 UTCJul 24, 00:30 UTC20m
2026-07-23 PDT5989 DTW → PHL Jul 23, 22:15 UTCJul 23, 23:20 UTC1h 5m
2026-07-23 PDT5932 BUF → PHL Jul 23, 19:45 UTCJul 23, 20:45 UTC1h 0m
2026-07-23 PDT5932 BUF → PHL Jul 23, 17:45 UTCJul 23, 18:45 UTC1h 0m
2026-07-23 PDT6080 PHL → GSO Jul 23, 13:55 UTCJul 23, 14:50 UTC55m
2026-07-23 PDT6080 PHL → GSO Jul 23, 13:49 UTCJul 23, 14:50 UTC1h 1m
2026-07-23 PDT6080 PHL → GSO Jul 23, 11:40 UTCJul 23, 12:45 UTC1h 5m
2026-07-23 PDT6080 PHL → GSO Jul 23, 11:38 UTCJul 23, 12:43 UTC1h 5m
2026-07-23 PDT5984 - Jul 23, 09:20 UTCJul 23, 09:45 UTC25m
2026-07-23 PDT5912 PHL → MDT Jul 23, 02:10 UTCJul 23, 02:35 UTC25m
2026-07-23 PDT5912 PHL → MDT Jul 23, 02:07 UTCJul 23, 02:36 UTC29m
2026-07-22 PDT6042 PHL → GSP Jul 22, 23:05 UTCJul 22, 23:30 UTC25m
2026-07-22 PDT6042 PHL → GSP Jul 22, 22:05 UTCJul 22, 22:15 UTC10m
2026-07-22 PDT5868 BUF → PHL Jul 22, 19:20 UTCJul 22, 20:10 UTC50m
2026-07-22 PDT5868 BUF → PHL Jul 22, 19:17 UTCJul 22, 20:10 UTC53m
2026-07-22 PDT5868 BUF → PHL Jul 22, 17:40 UTCJul 22, 18:30 UTC50m
2026-07-22 PDT6099 CVG → CLT Jul 22, 16:00 UTCJul 22, 16:30 UTC30m
2026-07-22 PDT6099 CVG → CLT Jul 22, 15:56 UTCJul 22, 16:28 UTC32m
2026-07-22 PDT5800 PHL → RIC Jul 22, 13:35 UTCJul 22, 14:45 UTC1h 10m
2026-07-22 PDT5800 PHL → RIC Jul 22, 13:30 UTCJul 22, 14:44 UTC1h 14m
2026-07-22 PDT5934 - Jul 22, 03:15 UTCJul 22, 03:50 UTC35m
2026-07-21 PDT6126 MKE → PHL Jul 21, 15:20 UTCJul 21, 16:05 UTC45m

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 Jul 26, 21:30 UTC.
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, PDT6068, PDT6042, PDT6012.