Apparatus

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sensors Mode-S transponder

A8A6C0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N657AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A8A6C0
Octal
52123300
Decimal
11,052,736
Country
US
Tail
N657AE
Type
E145
No current signal · last broadcast 31m ago
Flights observed
377
Distinct callsigns
20
Country
US
Last broadcast
31m ago

Last known position

Most recent position reported by Mode-S A8A6C0.

Country allocation

The ICAO 24-bit address A8A6C0 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
PDT6121 - 7 2026-07-11
PDT6041 - 7 2026-07-13
PDT5942 - 7 2026-07-05
PDT5816 - 7 2026-07-13
PDT6130 - 6 2026-07-01
PDT6126 - 6 2026-07-13
PDT5925 - 6 2026-07-12
PDT6093 - 5 2026-06-28
PDT6077 - 5 2026-06-30
PDT6038 - 5 2026-07-10
PDT6026 - 5 2026-06-20
PDT6015 Piedmont Airlines 5 2026-06-23
PDT5982 - 5 2026-06-27
PDT5974 - 5 2026-07-11
PDT5963 - 5 2026-07-12
PDT5955 Piedmont Airlines 5 2026-04-24
PDT5871 - 5 2026-07-04
PDT6132 - 4 2026-07-10
PDT6117 - 4 2026-07-10
PDT6115 - 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT5924 - Jul 14, 19:45 UTCJul 14, 20:00 UTC15m
2026-07-14 PDT5924 - Jul 14, 17:30 UTCJul 14, 18:10 UTC40m
2026-07-14 PDT6031 - Jul 14, 14:55 UTCJul 14, 16:15 UTC1h 20m
2026-07-14 PDT6030 - Jul 14, 13:25 UTCJul 14, 13:50 UTC25m
2026-07-14 PDT5992 - Jul 14, 11:25 UTCJul 14, 11:55 UTC30m
2026-07-14 PDT5912 - Jul 14, 02:20 UTCJul 14, 02:45 UTC25m
2026-07-14 PDT8821 - Jul 14, 00:30 UTCJul 14, 01:20 UTC50m
2026-07-13 PDT5816 - Jul 13, 21:20 UTCJul 13, 22:15 UTC55m
2026-07-13 PDT6041 - Jul 13, 19:05 UTCJul 13, 19:55 UTC50m
2026-07-13 PDT6041 - Jul 13, 17:15 UTCJul 13, 18:05 UTC50m
2026-07-13 PDT6126 - Jul 13, 15:30 UTCJul 13, 16:15 UTC45m
2026-07-13 PDT6126 ROC → PHL Jul 13, 15:26 UTCJul 13, 16:19 UTC53m
2026-07-13 PDT6126 PHL → ROC Jul 13, 13:25 UTCJul 13, 14:15 UTC50m
2026-07-13 PDT5873 - Jul 13, 09:25 UTCJul 13, 10:00 UTC35m
2026-07-13 PDT5873 BUF → PHL Jul 13, 09:24 UTCJul 13, 10:21 UTC57m
2026-07-13 PDT5911 - Jul 13, 02:30 UTCJul 13, 03:30 UTC1h 0m
2026-07-12 PDT5862 CLE → PHL Jul 12, 23:59 UTCJul 13, 01:08 UTC1h 9m
2026-07-12 PDT5862 - Jul 12, 21:35 UTCJul 12, 22:50 UTC1h 15m
2026-07-12 PDT5963 - Jul 12, 18:30 UTCJul 12, 18:55 UTC25m
2026-07-12 PDT5963 MDT → PHL Jul 12, 18:27 UTCJul 12, 18:54 UTC27m
2026-07-12 PDT5963 - Jul 12, 16:55 UTCJul 12, 17:25 UTC30m
2026-07-12 PDT5925 - Jul 12, 14:45 UTCJul 12, 15:40 UTC55m
2026-07-12 PDT5925 BUF → PHL Jul 12, 14:45 UTCJul 12, 15:44 UTC59m
2026-07-12 PDT5925 - Jul 12, 12:50 UTCJul 12, 13:50 UTC1h 0m
2026-07-12 PDT6111 - Jul 12, 10:25 UTCJul 12, 11:15 UTC50m
2026-07-12 PDT5857 - Jul 12, 00:15 UTCJul 12, 01:15 UTC1h 0m
2026-07-11 PDT5974 - Jul 11, 21:55 UTCJul 11, 22:50 UTC55m
2026-07-11 PDT5974 - Jul 11, 19:50 UTCJul 11, 20:50 UTC1h 0m
2026-07-11 PDT6121 - Jul 11, 16:55 UTCJul 11, 17:35 UTC40m
2026-07-11 PDT6121 PHL → ORF Jul 11, 15:05 UTCJul 11, 15:40 UTC35m
2026-07-11 PDT6029 - Jul 11, 11:55 UTCJul 11, 13:05 UTC1h 10m
2026-07-11 PDT6027 - Jul 11, 00:00 UTCJul 11, 01:05 UTC1h 5m
2026-07-10 PDT6027 PHL → YUL Jul 10, 23:57 UTCJul 11, 01:06 UTC1h 9m
2026-07-10 PDT6038 - Jul 10, 21:15 UTCJul 10, 22:40 UTC1h 25m
2026-07-10 PDT6038 BGR → PHL Jul 10, 21:15 UTCJul 10, 22:41 UTC1h 26m
2026-07-10 PDT6038 - Jul 10, 18:40 UTCJul 10, 19:50 UTC1h 10m
2026-07-10 PDT5920 - Jul 10, 17:00 UTCJul 10, 17:25 UTC25m
2026-07-10 PDT5920 SCE → PHL Jul 10, 16:51 UTCJul 10, 17:23 UTC32m
2026-07-10 PDT5920 - Jul 10, 15:40 UTCJul 10, 16:10 UTC30m
2026-07-10 PDT6117 - Jul 10, 14:20 UTCJul 10, 14:40 UTC20m
2026-07-10 PDT5836 - Jul 10, 12:10 UTCJul 10, 13:15 UTC1h 5m
2026-07-10 PDT6100 - Jul 10, 09:10 UTCJul 10, 10:10 UTC1h 0m
2026-07-10 PDT5944 - Jul 10, 03:40 UTCJul 10, 04:00 UTC20m
2026-07-10 PDT6132 - Jul 10, 00:35 UTCJul 10, 02:15 UTC1h 40m
2026-07-09 PDT6132 - Jul 9, 16:10 UTCJul 9, 17:20 UTC1h 10m
2026-07-09 PDT6117 - Jul 9, 14:20 UTCJul 9, 14:45 UTC25m
2026-07-09 PDT6117 MDT → PHL Jul 9, 14:15 UTCJul 9, 14:42 UTC27m
2026-07-09 PDT5836 - Jul 9, 12:00 UTCJul 9, 13:05 UTC1h 5m
2026-07-09 PDT5836 CLT → MDT Jul 9, 11:59 UTCJul 9, 13:00 UTC1h 1m
2026-07-09 PDT5895 - Jul 9, 09:10 UTCJul 9, 10:00 UTC50m

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 N657AE page for operator, model, and routing details .

Mode-S A8A6C0 frequently asked

What is Mode-S code A8A6C0?
A8A6C0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N657AE.
Where is Mode-S A8A6C0 registered?
Mode-S code A8A6C0 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 A8A6C0 broadcasting right now?
No active broadcast right now. Last signal was 31m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8A6C0, octal 52123300, decimal 11,052,736.
What flights does A8A6C0 operate?
Mode-S A8A6C0 has broadcast 20 distinct callsigns, including PDT6121, PDT6041, PDT5942, PDT5816, PDT6130.