Apparatus

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sensors Mode-S transponder

AC90A0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N909AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
AC90A0
Octal
53110240
Decimal
11,309,216
Country
US
Tail
N909AE
Type
E145
No current signal · last broadcast 7h ago
Flights observed
620
Distinct callsigns
20
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S AC90A0.

Country allocation

The ICAO 24-bit address AC90A0 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
PDT6062 - 12 2026-06-17
PDT6018 - 12 2026-07-13
PDT5803 - 9 2026-07-02
PDT6124 - 8 2026-06-22
PDT6128 Piedmont Airlines 7 2026-06-17
PDT5965 Piedmont Airlines 7 2026-06-12
PDT5804 - 7 2026-06-18
PDT6132 - 6 2026-07-05
PDT6125 - 6 2026-06-12
PDT6108 - 6 2026-06-28
PDT5940 - 6 2026-06-15
PDT5936 Piedmont Airlines 6 2026-06-10
PDT5934 Piedmont Airlines 6 2026-06-10
PDT5885 - 6 2026-06-29
PDT5856 - 6 2026-07-13
PDT5851 - 6 2026-07-01
PDT5831 Piedmont Airlines 6 2026-06-18
PDT5810 Piedmont Airlines 6 2026-05-24
PDT5805 - 6 2026-07-11
PDT6134 Piedmont Airlines 5 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT5882 - Jul 14, 01:15 UTCJul 14, 01:45 UTC30m
2026-07-14 PDT5882 CLT → ROA Jul 14, 01:10 UTCJul 14, 01:41 UTC31m
2026-07-13 PDT6018 - Jul 13, 22:40 UTCJul 13, 23:35 UTC55m
2026-07-13 PDT6018 - Jul 13, 21:10 UTCJul 13, 21:40 UTC30m
2026-07-13 PDT6069 - Jul 13, 19:20 UTCJul 13, 20:10 UTC50m
2026-07-13 PDT6069 EWN → CLT Jul 13, 19:14 UTCJul 13, 20:04 UTC50m
2026-07-13 PDT6069 - Jul 13, 17:25 UTCJul 13, 18:00 UTC35m
2026-07-13 PDT5910 - Jul 13, 15:15 UTCJul 13, 16:00 UTC45m
2026-07-13 PDT5910 - Jul 13, 13:40 UTCJul 13, 14:25 UTC45m
2026-07-13 PDT5856 - Jul 13, 10:50 UTCJul 13, 11:20 UTC30m
2026-07-13 PDT5856 FAY → CLT Jul 13, 10:47 UTCJul 13, 11:18 UTC31m
2026-07-13 PDT5874 - Jul 13, 02:05 UTCJul 13, 02:35 UTC30m
2026-07-12 PDT6067 - Jul 12, 23:20 UTCJul 13, 00:25 UTC1h 5m
2026-07-12 PDT6067 - Jul 12, 21:05 UTCJul 12, 22:05 UTC1h 0m
2026-07-12 PDT5785 - Jul 12, 18:10 UTCJul 12, 19:15 UTC1h 5m
2026-07-12 PDT5785 - Jul 12, 16:10 UTCJul 12, 17:05 UTC55m
2026-07-12 PDT6050 - Jul 12, 13:10 UTCJul 12, 14:05 UTC55m
2026-07-12 PDT6050 CHA → CLT Jul 12, 13:10 UTCJul 12, 14:01 UTC51m
2026-07-12 PDT6050 - Jul 12, 11:45 UTCJul 12, 12:25 UTC40m
2026-07-12 PDT6100 - Jul 12, 09:20 UTCJul 12, 10:30 UTC1h 10m
2026-07-12 PDT5944 PHL → HAR Jul 12, 02:15 UTCJul 12, 02:45 UTC30m
2026-07-12 PDT5837 - Jul 12, 00:35 UTCJul 12, 01:20 UTC45m
2026-07-12 PDT5837 SYR → PHL Jul 12, 00:28 UTCJul 12, 01:18 UTC50m
2026-07-11 PDT5837 - Jul 11, 22:30 UTCJul 11, 23:35 UTC1h 5m
2026-07-11 PDT5907 - Jul 11, 20:35 UTCJul 11, 21:30 UTC55m
2026-07-11 PDT5907 - Jul 11, 18:45 UTCJul 11, 19:45 UTC1h 0m
2026-07-11 PDT5907 PHL → PHL Jul 11, 17:30 UTCJul 11, 17:35 UTC5m
2026-07-11 PDT6031 FWA → PHL Jul 11, 15:15 UTCJul 11, 16:35 UTC1h 20m
2026-07-11 PDT6031 FWA → PHL Jul 11, 15:14 UTCJul 11, 16:33 UTC1h 19m
2026-07-11 PDT6030 - Jul 11, 13:40 UTCJul 11, 14:05 UTC25m
2026-07-11 PDT5917 - Jul 11, 10:30 UTCJul 11, 11:25 UTC55m
2026-07-11 PDT5879 - Jul 11, 02:25 UTCJul 11, 03:50 UTC1h 25m
2026-07-11 PDT5879 CLT → TLH Jul 11, 02:21 UTCJul 11, 03:48 UTC1h 27m
2026-07-11 PDT5805 - Jul 11, 00:15 UTCJul 11, 00:45 UTC30m
2026-07-10 PDT5805 - Jul 10, 18:45 UTCJul 10, 19:45 UTC1h 0m
2026-07-10 PDT5805 - Jul 10, 17:25 UTCJul 10, 17:45 UTC20m
2026-07-10 PDT6101 - Jul 10, 15:25 UTCJul 10, 15:50 UTC25m
2026-07-10 PDT6101 AVL → CLT Jul 10, 15:24 UTCJul 10, 15:49 UTC25m
2026-07-10 PDT6030 - Jul 10, 13:50 UTCJul 10, 14:10 UTC20m
2026-07-10 PDT6030 CLT → AVL Jul 10, 13:46 UTCJul 10, 14:09 UTC23m
2026-07-10 PDT6087 - Jul 10, 10:30 UTCJul 10, 11:35 UTC1h 5m
2026-07-10 PDT5961 - Jul 10, 00:55 UTCJul 10, 02:00 UTC1h 5m
2026-07-09 PDT6067 - Jul 9, 22:30 UTCJul 9, 23:35 UTC1h 5m
2026-07-09 PDT6067 - Jul 9, 19:55 UTCJul 9, 20:55 UTC1h 0m
2026-07-09 PDT5853 - Jul 9, 17:30 UTCJul 9, 18:10 UTC40m
2026-07-09 PDT5853 OAJ → CLT Jul 9, 17:25 UTCJul 9, 18:12 UTC47m
2026-07-09 PDT5853 - Jul 9, 16:15 UTCJul 9, 16:45 UTC30m
2026-07-09 PDT6080 - Jul 9, 14:00 UTCJul 9, 14:55 UTC55m
2026-07-09 PDT6080 GNV → CLT Jul 9, 13:54 UTCJul 9, 14:54 UTC1h 0m
2026-07-09 PDT6080 - Jul 9, 11:55 UTCJul 9, 12:55 UTC1h 0m

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 N909AE page for operator, model, and routing details .

Mode-S AC90A0 frequently asked

What is Mode-S code AC90A0?
AC90A0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N909AE.
Where is Mode-S AC90A0 registered?
Mode-S code AC90A0 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 AC90A0 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC90A0, octal 53110240, decimal 11,309,216.
What flights does AC90A0 operate?
Mode-S AC90A0 has broadcast 20 distinct callsigns, including PDT6062, PDT6018, PDT5803, PDT6124, PDT6128.