Apparatus

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sensors Mode-S transponder

AC6F31

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N900AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
AC6F31
Octal
53067461
Decimal
11,300,657
Country
US
Tail
N900AE
Type
E145
No current signal · last broadcast 4h ago
Flights observed
738
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AC6F31.

Country allocation

The ICAO 24-bit address AC6F31 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
PDT5825 - 10 2026-07-12
PDT6115 Piedmont Airlines 9 2026-06-06
PDT6010 - 9 2026-07-12
PDT5910 - 9 2026-06-20
PDT5836 Piedmont Airlines 9 2026-05-17
PDT5813 Piedmont Airlines 9 2026-06-18
PDT6057 Piedmont Airlines 8 2026-05-13
PDT6051 Piedmont Airlines 8 2026-06-08
PDT5972 - 8 2026-06-16
PDT5970 - 8 2026-06-16
PDT5838 - 8 2026-07-13
PDT5810 - 8 2026-07-02
PDT6127 Piedmont Airlines 7 2026-06-02
PDT6126 - 7 2026-06-30
PDT6120 - 7 2026-06-23
PDT6119 - 7 2026-07-08
PDT6050 - 7 2026-06-19
PDT5958 Piedmont Airlines 7 2026-05-07
PDT5876 - 7 2026-07-08
PDT5843 - 7 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT5791 - Jul 14, 03:35 UTCJul 14, 03:50 UTC15m
2026-07-14 PDT5792 - Jul 14, 00:30 UTCJul 14, 00:55 UTC25m
2026-07-13 PDT5792 - Jul 13, 23:20 UTCJul 13, 23:45 UTC25m
2026-07-13 PDT5941 - Jul 13, 20:25 UTCJul 13, 20:55 UTC30m
2026-07-13 PDT5941 - Jul 13, 19:00 UTCJul 13, 19:20 UTC20m
2026-07-13 PDT5838 - Jul 13, 15:45 UTCJul 13, 17:05 UTC1h 20m
2026-07-13 PDT5838 - Jul 13, 13:15 UTCJul 13, 14:35 UTC1h 20m
2026-07-13 PDT5975 - Jul 13, 11:10 UTCJul 13, 12:00 UTC50m
2026-07-13 PDT5827 - Jul 13, 01:15 UTCJul 13, 01:45 UTC30m
2026-07-12 PDT5825 LYH → CLT Jul 12, 23:04 UTCJul 12, 23:51 UTC47m
2026-07-12 PDT5825 - Jul 12, 20:55 UTCJul 12, 21:30 UTC35m
2026-07-12 PDT6077 - Jul 12, 18:55 UTCJul 12, 19:15 UTC20m
2026-07-12 PDT6077 FLO → CLT Jul 12, 18:50 UTCJul 12, 19:15 UTC25m
2026-07-12 PDT6077 - Jul 12, 17:15 UTCJul 12, 17:30 UTC15m
2026-07-12 PDT6068 - Jul 12, 15:05 UTCJul 12, 15:40 UTC35m
2026-07-12 PDT6068 - Jul 12, 13:25 UTCJul 12, 13:55 UTC30m
2026-07-12 PDT6010 - Jul 12, 10:05 UTCJul 12, 11:10 UTC1h 5m
2026-07-12 PDT5945 - Jul 12, 02:45 UTCJul 12, 03:20 UTC35m
2026-07-12 PDT5918 - Jul 12, 01:25 UTCJul 12, 01:50 UTC25m
2026-07-11 PDT5918 - Jul 11, 23:45 UTCJul 12, 00:40 UTC55m
2026-07-11 PDT6025 YUL → PHL Jul 11, 21:30 UTCJul 11, 22:40 UTC1h 10m
2026-07-11 PDT6023 - Jul 11, 18:25 UTCJul 11, 19:55 UTC1h 30m
2026-07-11 PDT6023 PHL → YUL Jul 11, 18:24 UTCJul 11, 19:35 UTC1h 11m
2026-07-11 PDT5908 - Jul 11, 14:50 UTCJul 11, 16:00 UTC1h 10m
2026-07-11 PDT5799 - Jul 11, 13:20 UTCJul 11, 13:30 UTC10m
2026-07-11 PDT5799 CLT → GSP Jul 11, 13:17 UTCJul 11, 13:34 UTC17m
2026-07-11 PDT5975 - Jul 11, 10:35 UTCJul 11, 11:05 UTC30m
2026-07-11 PDT5827 - Jul 11, 03:05 UTCJul 11, 03:35 UTC30m
2026-07-10 PDT5845 - Jul 10, 22:30 UTCJul 10, 23:50 UTC1h 20m
2026-07-10 PDT5845 - Jul 10, 20:30 UTCJul 10, 21:40 UTC1h 10m
2026-07-10 PDT5822 - Jul 10, 17:10 UTCJul 10, 17:45 UTC35m
2026-07-10 PDT5822 - Jul 10, 15:25 UTCJul 10, 15:50 UTC25m
2026-07-10 PDT6105 - Jul 10, 12:25 UTCJul 10, 13:10 UTC45m
2026-07-10 PDT6105 CHA → CLT Jul 10, 12:24 UTCJul 10, 13:22 UTC58m
2026-07-10 PDT5787 - Jul 10, 01:20 UTCJul 10, 02:00 UTC40m
2026-07-09 PDT5795 - Jul 9, 21:30 UTCJul 9, 23:00 UTC1h 30m
2026-07-09 PDT5795 - Jul 9, 18:50 UTCJul 9, 20:30 UTC1h 40m
2026-07-09 PDT5838 - Jul 9, 15:40 UTCJul 9, 17:00 UTC1h 20m
2026-07-09 PDT5838 GPT → CLT Jul 9, 15:35 UTCJul 9, 17:00 UTC1h 25m
2026-07-09 PDT5838 - Jul 9, 13:15 UTCJul 9, 14:35 UTC1h 20m
2026-07-09 PDT5808 - Jul 9, 10:40 UTCJul 9, 11:45 UTC1h 5m
2026-07-09 PDT5808 EVV → CLT Jul 9, 10:33 UTCJul 9, 11:43 UTC1h 10m
2026-07-09 PDT5818 - Jul 9, 00:45 UTCJul 9, 01:45 UTC1h 0m
2026-07-08 PDT6119 - Jul 8, 21:45 UTCJul 8, 22:55 UTC1h 10m
2026-07-08 PDT6119 - Jul 8, 19:15 UTCJul 8, 20:25 UTC1h 10m
2026-07-08 PDT6017 - Jul 8, 16:50 UTCJul 8, 17:15 UTC25m
2026-07-08 PDT6017 AGS → CLT Jul 8, 16:47 UTCJul 8, 17:19 UTC32m
2026-07-08 PDT6017 - Jul 8, 15:20 UTCJul 8, 15:55 UTC35m
2026-07-08 PDT6048 - Jul 8, 13:15 UTCJul 8, 13:40 UTC25m
2026-07-08 PDT6048 - Jul 8, 11:35 UTCJul 8, 11:55 UTC20m

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 N900AE page for operator, model, and routing details .

Mode-S AC6F31 frequently asked

What is Mode-S code AC6F31?
AC6F31 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N900AE.
Where is Mode-S AC6F31 registered?
Mode-S code AC6F31 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 AC6F31 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC6F31, octal 53067461, decimal 11,300,657.
What flights does AC6F31 operate?
Mode-S AC6F31 has broadcast 20 distinct callsigns, including PDT5825, PDT6115, PDT6010, PDT5910, PDT5836.