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 Jul 26, 21:10 UTC
Flights observed
859
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

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 Piedmont Airlines 13 2026-07-18
PDT5810 - 10 2026-07-16
PDT6127 Piedmont Airlines 9 2026-07-26
PDT6115 Piedmont Airlines 9 2026-06-06
PDT6075 Piedmont Airlines 9 2026-07-23
PDT6010 - 9 2026-07-12
PDT5910 - 9 2026-06-20
PDT5836 Piedmont Airlines 9 2026-05-17
PDT5828 Piedmont Airlines 9 2026-07-18
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
PDT5898 Piedmont Airlines 8 2026-07-25
PDT5838 - 8 2026-07-13
PDT6131 Piedmont Airlines 7 2026-07-23
PDT6126 - 7 2026-06-30
PDT6120 - 7 2026-06-23
PDT6119 - 7 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PDT5902 CMH → ORD Jul 26, 20:15 UTCJul 26, 21:10 UTC55m
2026-07-26 PDT6127 PHF → CLT Jul 26, 18:15 UTCJul 26, 19:05 UTC50m
2026-07-26 PDT6127 PHF → CLT Jul 26, 16:45 UTCJul 26, 17:30 UTC45m
2026-07-26 PDT6086 FWA → CLT Jul 26, 14:40 UTCJul 26, 15:25 UTC45m
2026-07-26 PDT6086 FWA → CLT Jul 26, 12:10 UTCJul 26, 13:55 UTC1h 45m
2026-07-26 PDT6097 ORF → PHL Jul 26, 01:00 UTCJul 26, 02:35 UTC1h 35m
2026-07-25 PDT6032 EVV → CLT Jul 25, 23:25 UTCJul 25, 23:45 UTC20m
2026-07-25 PDT6032 EVV → CLT Jul 25, 23:18 UTCJul 25, 23:45 UTC27m
2026-07-25 PDT6032 EVV → CLT Jul 25, 22:00 UTCJul 25, 22:20 UTC20m
2026-07-25 PDT5923 BOS → ROC Jul 25, 19:45 UTCJul 25, 20:40 UTC55m
2026-07-25 PDT5923 BOS → ROC Jul 25, 19:41 UTCJul 25, 20:41 UTC1h 0m
2026-07-25 PDT5923 BOS → ROC Jul 25, 17:40 UTCJul 25, 18:40 UTC1h 0m
2026-07-25 PDT5898 PHL → MDT Jul 25, 15:30 UTCJul 25, 16:15 UTC45m
2026-07-25 PDT5898 PHL → MDT Jul 25, 15:28 UTCJul 25, 16:11 UTC43m
2026-07-25 PDT5898 PHL → MDT Jul 25, 13:55 UTCJul 25, 14:25 UTC30m
2026-07-25 PDT6087 PHL → ISP Jul 25, 10:50 UTCJul 25, 12:05 UTC1h 15m
2026-07-25 PDT5961 ILM → PHL Jul 25, 01:00 UTCJul 25, 02:00 UTC1h 0m
2026-07-24 PDT6067 PHL → LEX Jul 24, 21:45 UTCJul 24, 22:50 UTC1h 5m
2026-07-24 PDT6067 PHL → LEX Jul 24, 19:35 UTCJul 24, 20:30 UTC55m
2026-07-24 PDT5883 SBY → CLT Jul 24, 17:20 UTCJul 24, 17:50 UTC30m
2026-07-24 PDT5883 SBY → CLT Jul 24, 15:45 UTCJul 24, 16:10 UTC25m
2026-07-24 PDT5938 ORF → PHL Jul 24, 02:55 UTCJul 24, 03:45 UTC50m
2026-07-24 PDT6055 PHL → ALB Jul 24, 00:20 UTCJul 24, 01:10 UTC50m
2026-07-24 PDT6055 PHL → ALB Jul 24, 00:15 UTCJul 24, 01:06 UTC51m
2026-07-23 PDT6055 PHL → ALB Jul 23, 22:55 UTCJul 23, 23:25 UTC30m
2026-07-23 PDT6131 MDT → PHL Jul 23, 20:50 UTCJul 23, 21:15 UTC25m
2026-07-23 PDT6131 MDT → PHL Jul 23, 20:48 UTCJul 23, 21:14 UTC26m
2026-07-23 PDT6131 MDT → PHL Jul 23, 19:30 UTCJul 23, 19:55 UTC25m
2026-07-23 PDT6075 PHL → SCE Jul 23, 17:30 UTCJul 23, 18:00 UTC30m
2026-07-23 PDT6075 PHL → SCE Jul 23, 15:30 UTCJul 23, 16:00 UTC30m
2026-07-23 PDT6072 ROA → PHL Jul 23, 13:05 UTCJul 23, 13:40 UTC35m
2026-07-23 PDT6072 ROA → PHL Jul 23, 11:35 UTCJul 23, 12:05 UTC30m
2026-07-23 PDT6072 ROA → PHL Jul 23, 11:34 UTCJul 23, 12:01 UTC27m
2026-07-23 PDT6100 YUL → PHL Jul 23, 09:20 UTCJul 23, 10:30 UTC1h 10m
2026-07-23 PDT6100 YUL → PHL Jul 23, 09:18 UTCJul 23, 10:27 UTC1h 9m
2026-07-23 PDT5949 PHL → MDT Jul 23, 01:15 UTCJul 23, 01:35 UTC20m
2026-07-22 PDT5965 PHL → SAV Jul 22, 23:50 UTCJul 23, 00:15 UTC25m
2026-07-22 PDT5965 PHL → SAV Jul 22, 23:49 UTCJul 23, 00:15 UTC26m
2026-07-22 PDT5989 DTW → PHL Jul 22, 21:50 UTCJul 22, 22:55 UTC1h 5m
2026-07-22 PDT5989 DTW → PHL Jul 22, 21:46 UTCJul 22, 22:54 UTC1h 8m
2026-07-22 PDT5858 CLT → PHF Jul 22, 19:25 UTCJul 22, 20:00 UTC35m
2026-07-22 PDT5858 CLT → PHF Jul 22, 17:45 UTCJul 22, 18:15 UTC30m
2026-07-22 PDT5858 CLT → PHF Jul 22, 17:41 UTCJul 22, 18:15 UTC34m
2026-07-22 PDT5863 ORD → MDT Jul 22, 15:45 UTCJul 22, 16:15 UTC30m
2026-07-22 PDT5863 ORD → MDT Jul 22, 15:39 UTCJul 22, 16:23 UTC44m
2026-07-22 PDT5863 ORD → MDT Jul 22, 13:35 UTCJul 22, 14:00 UTC25m
2026-07-22 PDT5808 EVV → CLT Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 PDT5818 CLT → EVV Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-22 PDT5818 CLT → EVV Jul 22, 04:32 UTCJul 22, 05:40 UTC1h 8m
2026-07-21 PDT5988 PHL → PVD Jul 21, 21:30 UTCJul 21, 22:35 UTC1h 5m

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 Jul 26, 21:10 UTC.
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, PDT5810, PDT6127, PDT6115, PDT6075.