Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACF841

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N935AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
ACF841
Octal
53174101
Decimal
11,335,745
Country
US
Tail
N935AE
Type
E145
No current signal · last broadcast 5d ago
Flights observed
606
Distinct callsigns
20
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S ACF841.

Country allocation

The ICAO 24-bit address ACF841 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
PDT6103 - 10 2026-06-30
PDT6091 Piedmont Airlines 9 2026-05-17
PDT5991 Piedmont Airlines 9 2026-05-10
PDT6132 Piedmont Airlines 8 2026-06-05
PDT5988 - 8 2026-06-16
PDT5785 Piedmont Airlines 8 2026-06-02
PDT6092 - 7 2026-06-29
PDT6067 - 7 2026-06-24
PDT5993 Piedmont Airlines 7 2026-05-08
PDT5990 - 7 2026-06-20
PDT6134 Piedmont Airlines 6 2026-05-08
PDT6046 Piedmont Airlines 6 2026-05-19
PDT6043 - 6 2026-06-18
PDT6000 Piedmont Airlines 6 2026-05-24
PDT5978 - 6 2026-06-20
PDT5941 Piedmont Airlines 6 2026-05-09
PDT5940 Piedmont Airlines 6 2026-06-02
PDT5906 Piedmont Airlines 6 2026-05-18
PDT5867 Piedmont Airlines 6 2026-05-27
PDT5824 - 6 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 PDT9975 - Jul 9, 01:30 UTCJul 9, 03:10 UTC1h 40m
2026-07-08 PDT9975 - Jul 8, 22:15 UTCJul 8, 23:55 UTC1h 40m
2026-06-30 PDT6095 - Jun 30, 14:10 UTCJun 30, 14:55 UTC45m
2026-06-30 PDT6095 SYR → PHL Jun 30, 14:07 UTCJun 30, 14:53 UTC46m
2026-06-30 PDT6103 - Jun 30, 12:25 UTCJun 30, 13:05 UTC40m
2026-06-30 PDT6096 - Jun 30, 09:50 UTCJun 30, 11:00 UTC1h 10m
2026-06-30 PDT6093 - Jun 30, 02:15 UTCJun 30, 03:30 UTC1h 15m
2026-06-29 PDT6092 - Jun 29, 23:54 UTCJun 30, 00:39 UTC45m
2026-06-29 PDT6092 - Jun 29, 22:05 UTCJun 29, 22:49 UTC45m
2026-06-29 PDT5907 - Jun 29, 19:29 UTCJun 29, 20:19 UTC50m
2026-06-29 PDT5907 - Jun 29, 17:34 UTCJun 29, 18:25 UTC50m
2026-06-29 PDT5997 - Jun 29, 15:04 UTCJun 29, 15:45 UTC40m
2026-06-29 PDT5997 BDL → PHL Jun 29, 15:01 UTCJun 29, 15:49 UTC48m
2026-06-29 PDT5997 - Jun 29, 13:39 UTCJun 29, 14:19 UTC40m
2026-06-29 PDT6111 HFD → PSQ Jun 29, 10:24 UTCJun 29, 11:14 UTC50m
2026-06-29 PDT6107 PHL → ALB Jun 29, 01:29 UTCJun 29, 02:09 UTC40m
2026-06-29 PDT6107 PHL → ALB Jun 29, 01:29 UTCJun 29, 02:06 UTC37m
2026-06-28 PDT5974 - Jun 28, 20:14 UTCJun 28, 20:59 UTC45m
2026-06-28 PDT5974 ART → PHL Jun 28, 20:09 UTCJun 28, 21:01 UTC52m
2026-06-28 PDT5974 - Jun 28, 18:34 UTCJun 28, 19:14 UTC40m
2026-06-28 PDT5819 - Jun 28, 15:55 UTCJun 28, 17:19 UTC1h 25m
2026-06-28 PDT5819 SDF → PHL Jun 28, 15:52 UTCJun 28, 17:18 UTC1h 26m
2026-06-28 PDT5819 - Jun 28, 13:19 UTCJun 28, 15:09 UTC1h 50m
2026-06-28 PDT6092 - Jun 28, 02:29 UTCJun 28, 03:09 UTC40m
2026-06-28 PDT6092 - Jun 28, 00:50 UTCJun 28, 01:40 UTC50m
2026-06-27 PDT5968 - Jun 27, 22:20 UTCJun 27, 23:39 UTC1h 20m
2026-06-27 PDT5968 IND → PHL Jun 27, 22:16 UTCJun 27, 23:39 UTC1h 23m
2026-06-27 PDT5968 - Jun 27, 18:20 UTCJun 27, 19:49 UTC1h 30m
2026-06-27 PDT5968 PHL → IND Jun 27, 18:18 UTCJun 27, 19:53 UTC1h 35m
2026-06-27 PDT5960 - Jun 27, 15:45 UTCJun 27, 16:55 UTC1h 10m
2026-06-27 PDT5960 CVG → PHL Jun 27, 15:41 UTCJun 27, 16:52 UTC1h 11m
2026-06-27 PDT5960 - Jun 27, 13:30 UTCJun 27, 15:00 UTC1h 30m
2026-06-26 PDT6114 - Jun 26, 23:49 UTCJun 27, 00:39 UTC50m
2026-06-26 PDT6114 - Jun 26, 21:59 UTCJun 26, 22:55 UTC55m
2026-06-26 PDT6005 - Jun 26, 19:39 UTCJun 26, 20:34 UTC55m
2026-06-26 PDT6005 ROA → PHL Jun 26, 19:39 UTCJun 26, 20:38 UTC59m
2026-06-26 PDT5900 - Jun 26, 18:09 UTCJun 26, 18:49 UTC40m
2026-06-26 PDT5869 - Jun 26, 16:00 UTCJun 26, 16:49 UTC50m
2026-06-26 PDT5869 - Jun 26, 14:15 UTCJun 26, 14:59 UTC45m
2026-06-26 PDT5975 - Jun 26, 10:44 UTCJun 26, 11:05 UTC20m
2026-06-26 PDT5827 - Jun 26, 01:05 UTCJun 26, 01:29 UTC25m
2026-06-25 PDT5939 - Jun 25, 22:20 UTCJun 25, 22:45 UTC25m
2026-06-25 PDT5939 - Jun 25, 21:10 UTCJun 25, 21:29 UTC20m
2026-06-25 PDT5805 - Jun 25, 18:39 UTCJun 25, 19:09 UTC30m
2026-06-25 PDT5805 GSP → CLT Jun 25, 18:38 UTCJun 25, 19:15 UTC37m
2026-06-25 PDT5805 - Jun 25, 17:30 UTCJun 25, 17:44 UTC15m
2026-06-25 PCT6009 - Jun 25, 10:59 UTCJun 25, 11:44 UTC45m
2026-06-25 PDT5812 - Jun 25, 01:24 UTCJun 25, 01:54 UTC30m
2026-06-24 PDT6067 - Jun 24, 21:50 UTCJun 24, 22:45 UTC55m
2026-06-24 PDT6067 EVV → CLT Jun 24, 21:40 UTCJun 24, 22:44 UTC1h 4m

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 N935AE page for operator, model, and routing details .

Mode-S ACF841 frequently asked

What is Mode-S code ACF841?
ACF841 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N935AE.
Where is Mode-S ACF841 registered?
Mode-S code ACF841 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 ACF841 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF841, octal 53174101, decimal 11,335,745.
What flights does ACF841 operate?
Mode-S ACF841 has broadcast 20 distinct callsigns, including PDT6103, PDT6091, PDT5991, PDT6132, PDT5988.