Apparatus

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sensors Mode-S transponder

A906F3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N681AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A906F3
Octal
52203363
Decimal
11,077,363
Country
US
Tail
N681AE
Type
E145
No current signal · last broadcast 6h ago
Flights observed
841
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A906F3.

Country allocation

The ICAO 24-bit address A906F3 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
PDT6126 - 13 2026-07-08
PDT6036 Piedmont Airlines 11 2026-06-03
PDT5817 - 11 2026-07-12
PDT6116 - 10 2026-07-11
PDT6046 - 10 2026-07-06
PDT5852 - 10 2026-07-13
PDT5988 Piedmont Airlines 9 2026-06-10
PDT5902 - 9 2026-06-23
PDT5848 Piedmont Airlines 9 2026-06-30
PDT6127 - 8 2026-06-29
PDT6083 - 8 2026-07-01
PDT6081 - 8 2026-07-01
PDT6056 Piedmont Airlines 8 2026-06-13
PDT5939 Piedmont Airlines 8 2026-05-16
PDT5861 - 8 2026-07-08
PDT5832 - 8 2026-06-15
PDT5807 Piedmont Airlines 8 2026-05-08
PDT6129 - 7 2026-06-28
PDT6121 Piedmont Airlines 7 2026-06-02
PDT6112 - 7 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT6107 PSQ → BDL Jul 14, 00:10 UTCJul 14, 00:50 UTC40m
2026-07-14 PDT6107 PHL → BDL Jul 14, 00:10 UTCJul 14, 00:49 UTC39m
2026-07-13 PDT5895 - Jul 13, 22:05 UTCJul 13, 22:50 UTC45m
2026-07-13 PDT5895 - Jul 13, 19:55 UTCJul 13, 20:30 UTC35m
2026-07-13 PDT6115 - Jul 13, 16:55 UTCJul 13, 18:15 UTC1h 20m
2026-07-13 PDT6115 CAE → PHL Jul 13, 16:50 UTCJul 13, 18:21 UTC1h 31m
2026-07-13 PDT5994 - Jul 13, 15:25 UTCJul 13, 15:50 UTC25m
2026-07-13 PDT5994 CLT → CAE Jul 13, 15:24 UTCJul 13, 15:58 UTC34m
2026-07-13 PDT5852 - Jul 13, 13:05 UTCJul 13, 13:45 UTC40m
2026-07-13 PDT5852 - Jul 13, 11:30 UTCJul 13, 12:00 UTC30m
2026-07-13 PDT5855 - Jul 13, 09:40 UTCJul 13, 10:10 UTC30m
2026-07-13 PDT5815 - Jul 13, 01:25 UTCJul 13, 01:45 UTC20m
2026-07-13 PDT5815 CLT → CAE Jul 13, 01:24 UTCJul 13, 01:52 UTC28m
2026-07-12 PDT6078 - Jul 12, 22:55 UTCJul 13, 00:05 UTC1h 10m
2026-07-12 PDT6078 - Jul 12, 19:30 UTCJul 12, 20:30 UTC1h 0m
2026-07-12 PDT5956 - Jul 12, 17:05 UTCJul 12, 17:55 UTC50m
2026-07-12 PDT5956 - Jul 12, 15:15 UTCJul 12, 16:01 UTC45m
2026-07-12 PDT5817 - Jul 12, 13:10 UTCJul 12, 13:45 UTC35m
2026-07-12 PDT5817 - Jul 12, 11:50 UTCJul 12, 12:30 UTC40m
2026-07-12 PDT5954 - Jul 12, 09:10 UTCJul 12, 09:40 UTC30m
2026-07-12 PDT5954 TYS → CLT Jul 12, 09:05 UTCJul 12, 09:44 UTC39m
2026-07-12 PDT5909 - Jul 12, 01:50 UTCJul 12, 02:25 UTC35m
2026-07-11 PDT6116 - Jul 11, 22:25 UTCJul 11, 23:00 UTC35m
2026-07-11 PDT6116 - Jul 11, 21:05 UTCJul 11, 21:30 UTC25m
2026-07-11 PDT6112 - Jul 11, 19:15 UTCJul 11, 19:35 UTC20m
2026-07-11 PDT6112 - Jul 11, 17:35 UTCJul 11, 17:55 UTC20m
2026-07-11 PDT5820 - Jul 11, 15:20 UTCJul 11, 15:55 UTC35m
2026-07-11 PDT5820 ILM → CLT Jul 11, 15:15 UTCJul 11, 15:56 UTC41m
2026-07-11 PDT5820 - Jul 11, 13:55 UTCJul 11, 14:25 UTC30m
2026-07-11 PDT5933 - Jul 11, 11:10 UTCJul 11, 12:00 UTC50m
2026-07-11 PDT5882 - Jul 11, 02:00 UTCJul 11, 02:35 UTC35m
2026-07-11 PDT5882 CLT → ROA Jul 11, 01:55 UTCJul 11, 02:34 UTC39m
2026-07-10 PDT6070 - Jul 10, 23:45 UTCJul 11, 00:30 UTC45m
2026-07-10 PDT6070 - Jul 10, 22:05 UTCJul 10, 22:40 UTC35m
2026-07-10 PDT5844 - Jul 10, 18:25 UTCJul 10, 20:15 UTC1h 50m
2026-07-10 PDT5844 MOB → CLT Jul 10, 18:22 UTCJul 10, 20:12 UTC1h 50m
2026-07-10 PDT5844 - Jul 10, 15:30 UTCJul 10, 16:45 UTC1h 15m
2026-07-10 PDT5844 CLT → MOB Jul 10, 15:28 UTCJul 10, 16:46 UTC1h 18m
2026-07-10 PDT5852 - Jul 10, 13:15 UTCJul 10, 13:55 UTC40m
2026-07-10 PDT5852 OAJ → CLT Jul 10, 13:07 UTCJul 10, 13:55 UTC48m
2026-07-10 PDT5852 - Jul 10, 11:30 UTCJul 10, 12:00 UTC30m
2026-07-10 PDT5985 - Jul 10, 09:10 UTCJul 10, 10:00 UTC50m
2026-07-10 PDT5938 - Jul 10, 03:25 UTCJul 10, 04:05 UTC40m
2026-07-10 PDT5938 CLT → PHF Jul 10, 03:20 UTCJul 10, 04:04 UTC44m
2026-07-10 PDT6055 - Jul 10, 01:35 UTCJul 10, 02:20 UTC45m
2026-07-10 PDT6055 - Jul 10, 00:15 UTCJul 10, 00:50 UTC35m
2026-07-09 PDT5839 - Jul 9, 21:00 UTCJul 9, 22:05 UTC1h 5m
2026-07-09 PDT5839 MGM → CLT Jul 9, 20:53 UTCJul 9, 22:01 UTC1h 8m
2026-07-09 PDT5839 - Jul 9, 18:30 UTCJul 9, 19:25 UTC55m
2026-07-09 PDT6062 - Jul 9, 15:50 UTCJul 9, 17:00 UTC1h 10m

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 N681AE page for operator, model, and routing details .

Mode-S A906F3 frequently asked

What is Mode-S code A906F3?
A906F3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N681AE.
Where is Mode-S A906F3 registered?
Mode-S code A906F3 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 A906F3 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A906F3, octal 52203363, decimal 11,077,363.
What flights does A906F3 operate?
Mode-S A906F3 has broadcast 20 distinct callsigns, including PDT6126, PDT6036, PDT5817, PDT6116, PDT6046.