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sensors Mode-S transponder

A8A309

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N656AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A8A309
Octal
52121411
Decimal
11,051,785
Country
US
Tail
N656AE
Type
E145
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
868
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S A8A309.

Country allocation

The ICAO 24-bit address A8A309 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
PDT5831 - 15 2026-06-21
PDT6128 - 13 2026-07-22
PDT6036 - 10 2026-07-06
PDT5878 Piedmont Airlines 10 2026-05-23
PDT5861 - 10 2026-07-14
PDT5847 - 10 2026-07-15
PDT5824 Piedmont Airlines 10 2026-06-08
PDT5816 - 10 2026-07-13
PDT5795 Piedmont Airlines 10 2026-06-11
PDT6006 - 9 2026-07-23
PDT5977 Piedmont Airlines 9 2026-07-24
PDT6126 - 8 2026-07-04
PDT6049 Piedmont Airlines 8 2026-06-07
PDT6032 - 8 2026-07-20
PDT6018 Piedmont Airlines 8 2026-07-17
PDT5981 Piedmont Airlines 8 2026-05-24
PDT5855 Piedmont Airlines 8 2026-05-06
PDT5851 Piedmont Airlines 8 2026-07-24
PDT5849 - 8 2026-07-13
PDT5805 Piedmont Airlines 8 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PDT6078 PIT → PHL Jul 26, 20:45 UTCJul 26, 21:50 UTC1h 5m
2026-07-26 PDT5853 HSV → ORD Jul 26, 18:25 UTCJul 26, 19:05 UTC40m
2026-07-26 PDT5853 HSV → ORD Jul 26, 18:23 UTCJul 26, 19:06 UTC43m
2026-07-26 PDT5853 HSV → ORD Jul 26, 17:15 UTCJul 26, 17:40 UTC25m
2026-07-26 PDT5793 CLT → LYH Jul 26, 15:25 UTCJul 26, 15:55 UTC30m
2026-07-26 PDT5793 CLT → LYH Jul 26, 14:00 UTCJul 26, 14:25 UTC25m
2026-07-26 PDT6007 LEX → PHL Jul 26, 09:10 UTCJul 26, 09:50 UTC40m
2026-07-26 PDT5790 CLT → CHO Jul 26, 01:00 UTCJul 26, 01:40 UTC40m
2026-07-26 PDT5790 CLT → CHO Jul 26, 00:56 UTCJul 26, 01:39 UTC43m
2026-07-25 PDT6065 BOS → ROC Jul 25, 21:30 UTCJul 25, 22:45 UTC1h 15m
2026-07-25 PDT6065 BOS → ROC Jul 25, 19:15 UTCJul 25, 20:30 UTC1h 15m
2026-07-25 PDT6129 PHL → ROC Jul 25, 16:30 UTCJul 25, 17:40 UTC1h 10m
2026-07-25 PDT6129 PHL → ROC Jul 25, 14:00 UTCJul 25, 15:05 UTC1h 5m
2026-07-25 PDT5803 AVL → PHL Jul 25, 11:05 UTCJul 25, 11:55 UTC50m
2026-07-25 PDT5803 AVL → PHL Jul 25, 10:57 UTCJul 25, 11:52 UTC55m
2026-07-25 PDT5790 CLT → CHO Jul 25, 01:30 UTCJul 25, 02:05 UTC35m
2026-07-24 PDT5851 SYR → BOS Jul 24, 23:15 UTCJul 24, 23:50 UTC35m
2026-07-24 PDT5851 SYR → BOS Jul 24, 21:35 UTCJul 24, 22:05 UTC30m
2026-07-24 PDT5805 GSO → PHL Jul 24, 19:35 UTCJul 24, 20:00 UTC25m
2026-07-24 PDT5805 GSO → PHL Jul 24, 19:31 UTCJul 24, 19:56 UTC25m
2026-07-24 PDT5805 GSO → PHL Jul 24, 17:40 UTCJul 24, 18:05 UTC25m
2026-07-24 PDT5872 GSO → PHL Jul 24, 09:35 UTCJul 24, 10:45 UTC1h 10m
2026-07-24 PDT5977 ILM → PHL Jul 24, 01:35 UTCJul 24, 02:50 UTC1h 15m
2026-07-23 PDT5825 PHL → GSP Jul 23, 23:35 UTCJul 24, 00:10 UTC35m
2026-07-23 PDT5825 PHL → GSP Jul 23, 22:10 UTCJul 23, 22:45 UTC35m
2026-07-23 PDT6077 MSN → PHL Jul 23, 20:10 UTCJul 23, 20:35 UTC25m
2026-07-23 PDT6077 MSN → PHL Jul 23, 17:45 UTCJul 23, 18:05 UTC20m
2026-07-23 PDT5863 ORD → MDT Jul 23, 15:45 UTCJul 23, 16:30 UTC45m
2026-07-23 PDT5863 ORD → MDT Jul 23, 15:38 UTCJul 23, 16:27 UTC49m
2026-07-23 PDT5863 ORD → MDT Jul 23, 13:40 UTCJul 23, 14:15 UTC35m
2026-07-23 PDT6006 - Jul 23, 11:00 UTCJul 23, 11:50 UTC50m
2026-07-23 PDT6006 PGV → CLT Jul 23, 10:54 UTCJul 23, 11:49 UTC55m
2026-07-23 PDT5986 ILM → PHL Jul 23, 03:55 UTCJul 23, 04:25 UTC30m
2026-07-23 PDT5986 ILM → PHL Jul 23, 03:53 UTCJul 23, 04:28 UTC35m
2026-07-23 PDT5957 PHL → MHT Jul 23, 02:10 UTCJul 23, 02:45 UTC35m
2026-07-23 PDT5957 PHL → MHT Jul 23, 02:08 UTCJul 23, 02:41 UTC33m
2026-07-23 PDT5957 PHL → MHT Jul 23, 00:30 UTCJul 23, 01:10 UTC40m
2026-07-22 PDT6128 - Jul 22, 21:55 UTCJul 22, 23:00 UTC1h 5m
2026-07-22 PDT6128 - Jul 22, 20:05 UTCJul 22, 20:45 UTC40m
2026-07-22 PDT5998 ORD → ALB Jul 22, 18:00 UTCJul 22, 18:20 UTC20m
2026-07-22 PDT6094 LEX → CLT Jul 22, 15:30 UTCJul 22, 17:10 UTC1h 40m
2026-07-22 PDT5841 CLT → GSP Jul 22, 13:40 UTCJul 22, 14:05 UTC25m
2026-07-22 PDT5990 PHL → SYR Jul 22, 03:30 UTCJul 22, 04:35 UTC1h 5m
2026-07-22 PDT5990 PHL → SYR Jul 22, 03:26 UTCJul 22, 04:31 UTC1h 5m
2026-07-22 PDT6055 PHL → ALB Jul 22, 00:25 UTCJul 22, 01:05 UTC40m
2026-07-21 PDT6055 PHL → ALB Jul 21, 22:45 UTCJul 21, 23:30 UTC45m
2026-07-21 PDT6128 - Jul 21, 20:15 UTCJul 21, 21:00 UTC45m
2026-07-21 PDT6128 CHO → CLT Jul 21, 20:11 UTCJul 21, 20:59 UTC48m
2026-07-21 PDT6128 - Jul 21, 18:15 UTCJul 21, 19:05 UTC50m
2026-07-21 PDT5916 - Jul 21, 16:05 UTCJul 21, 17:10 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 N656AE page for operator, model, and routing details .

Mode-S A8A309 frequently asked

What is Mode-S code A8A309?
A8A309 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N656AE.
Where is Mode-S A8A309 registered?
Mode-S code A8A309 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 A8A309 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8A309, octal 52121411, decimal 11,051,785.
What flights does A8A309 operate?
Mode-S A8A309 has broadcast 20 distinct callsigns, including PDT5831, PDT6128, PDT6036, PDT5878, PDT5861.