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sensors Mode-S transponder

A8B8B9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N661JA · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A8B8B9
Octal
52134271
Decimal
11,057,337
Country
US
Tail
N661JA
Type
E145
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
929
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A8B8B9.

Country allocation

The ICAO 24-bit address A8B8B9 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
PDT6080 - 13 2026-07-05
PDT6016 - 13 2026-06-25
PDT5813 - 12 2026-07-21
PDT6119 - 11 2026-07-19
PDT6062 Piedmont Airlines 11 2026-07-26
PDT6067 - 10 2026-07-13
PDT5806 - 10 2026-06-30
PDT5796 Piedmont Airlines 10 2026-05-20
PDT6065 - 9 2026-07-15
PDT6064 - 9 2026-07-06
PDT5874 - 9 2026-07-12
PDT5853 Piedmont Airlines 9 2026-07-25
PDT5810 Piedmont Airlines 9 2026-06-12
PDT5787 Piedmont Airlines 9 2026-07-26
PDT6048 - 8 2026-07-19
PDT5968 Piedmont Airlines 8 2026-05-17
PDT5845 - 8 2026-07-01
PDT5814 Piedmont Airlines 8 2026-06-06
PDT5808 - 8 2026-07-04
PDT5791 - 8 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PDT5989 DTW → PHL Jul 26, 21:45 UTCJul 26, 22:15 UTC30m
2026-07-26 PDT5858 CLT → PHF Jul 26, 19:50 UTCJul 26, 20:30 UTC40m
2026-07-26 PDT5858 CLT → PHF Jul 26, 18:15 UTCJul 26, 18:40 UTC25m
2026-07-26 PDT6062 ILM → PHL Jul 26, 15:30 UTCJul 26, 16:45 UTC1h 15m
2026-07-26 PDT6062 ILM → PHL Jul 26, 11:45 UTCJul 26, 13:25 UTC1h 40m
2026-07-26 PDT5866 PHF → CLT Jul 26, 09:15 UTCJul 26, 10:05 UTC50m
2026-07-26 PDT5787 CLT → CHA Jul 26, 00:55 UTCJul 26, 01:40 UTC45m
2026-07-25 PDT5853 HSV → ORD Jul 25, 17:30 UTCJul 25, 18:15 UTC45m
2026-07-25 PDT5853 HSV → ORD Jul 25, 15:55 UTCJul 25, 16:25 UTC30m
2026-07-25 PDT5828 SYR → BOS Jul 25, 13:30 UTCJul 25, 14:15 UTC45m
2026-07-25 PDT5828 SYR → BOS Jul 25, 13:28 UTCJul 25, 14:09 UTC41m
2026-07-25 PDT5828 SYR → BOS Jul 25, 11:50 UTCJul 25, 12:20 UTC30m
2026-07-25 PDT5954 MDT → PHL Jul 25, 09:15 UTCJul 25, 09:50 UTC35m
2026-07-25 PDT5909 ERI → CLT Jul 25, 01:25 UTCJul 25, 02:00 UTC35m
2026-07-24 PDT6052 GSO → PHL Jul 24, 22:50 UTCJul 24, 23:40 UTC50m
2026-07-24 PDT6052 GSO → PHL Jul 24, 21:15 UTCJul 24, 21:55 UTC40m
2026-07-24 PDT5809 SAV → PHL Jul 24, 19:15 UTCJul 24, 19:45 UTC30m
2026-07-24 PDT5809 SAV → PHL Jul 24, 19:08 UTCJul 24, 19:46 UTC38m
2026-07-24 PDT5809 SAV → PHL Jul 24, 17:20 UTCJul 24, 17:50 UTC30m
2026-07-24 PDT5950 MDT → PHL Jul 24, 15:20 UTCJul 24, 16:00 UTC40m
2026-07-24 PDT5950 MDT → PHL Jul 24, 14:00 UTCJul 24, 14:35 UTC35m
2026-07-24 PDT5803 AVL → PHL Jul 24, 11:05 UTCJul 24, 11:55 UTC50m
2026-07-24 PDT5790 CLT → CHO Jul 24, 02:35 UTCJul 24, 03:05 UTC30m
2026-07-23 PDT5851 SYR → BOS Jul 23, 23:55 UTCJul 24, 00:45 UTC50m
2026-07-23 PDT5851 SYR → BOS Jul 23, 22:15 UTCJul 23, 22:55 UTC40m
2026-07-23 PDT6112 YYZ → PHL Jul 23, 19:55 UTCJul 23, 20:30 UTC35m
2026-07-23 PDT6112 YYZ → PHL Jul 23, 18:30 UTCJul 23, 19:05 UTC35m
2026-07-23 PDT5786 GSP → PHL Jul 23, 15:55 UTCJul 23, 17:25 UTC1h 30m
2026-07-23 PDT5829 CLT → PGV Jul 23, 14:20 UTCJul 23, 14:35 UTC15m
2026-07-23 PDT6013 PHL → SDF Jul 23, 12:45 UTCJul 23, 13:10 UTC25m
2026-07-23 PDT9975 CLT → ALO Jul 23, 11:10 UTCJul 23, 11:30 UTC20m
2026-07-22 PDT6034 PHL → BUF Jul 22, 23:30 UTCJul 23, 00:35 UTC1h 5m
2026-07-22 PDT6034 PHL → BUF Jul 22, 21:30 UTCJul 22, 22:50 UTC1h 20m
2026-07-22 PDT5951 PHL → BUF Jul 22, 18:30 UTCJul 22, 19:55 UTC1h 25m
2026-07-22 PDT5951 PHL → BUF Jul 22, 18:26 UTCJul 22, 19:51 UTC1h 25m
2026-07-22 PDT5951 PHL → BUF Jul 22, 16:15 UTCJul 22, 17:40 UTC1h 25m
2026-07-22 PDT6117 - Jul 22, 14:25 UTCJul 22, 14:45 UTC20m
2026-07-22 PDT5836 - Jul 22, 12:10 UTCJul 22, 13:15 UTC1h 5m
2026-07-22 PDT5836 CLT → MDT Jul 22, 12:05 UTCJul 22, 13:15 UTC1h 10m
2026-07-22 PDT5881 BNA → PHL Jul 22, 04:50 UTCJul 22, 05:15 UTC25m
2026-07-22 PDT5881 BNA → PHL Jul 22, 04:48 UTCJul 22, 05:17 UTC29m
2026-07-22 PDT5927 PHL → SYR Jul 22, 02:55 UTCJul 22, 04:00 UTC1h 5m
2026-07-22 PDT5879 PHL → ALB Jul 22, 01:00 UTCJul 22, 02:00 UTC1h 0m
2026-07-21 PDT5795 BOS → MDT Jul 21, 21:25 UTCJul 21, 23:00 UTC1h 35m
2026-07-21 PDT5795 BOS → MDT Jul 21, 21:23 UTCJul 21, 23:00 UTC1h 37m
2026-07-21 PDT5795 BOS → MDT Jul 21, 18:50 UTCJul 21, 20:35 UTC1h 45m
2026-07-21 PDT5813 - Jul 21, 16:35 UTCJul 21, 17:10 UTC35m
2026-07-21 PDT5813 - Jul 21, 14:50 UTCJul 21, 15:30 UTC40m
2026-07-21 PDT6105 PHL → YUL Jul 21, 12:35 UTCJul 21, 13:20 UTC45m
2026-07-21 PDT6085 ART → PHL Jul 21, 03:05 UTCJul 21, 03:45 UTC40m

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 N661JA page for operator, model, and routing details .

Mode-S A8B8B9 frequently asked

What is Mode-S code A8B8B9?
A8B8B9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N661JA.
Where is Mode-S A8B8B9 registered?
Mode-S code A8B8B9 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 A8B8B9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8B8B9, octal 52134271, decimal 11,057,337.
What flights does A8B8B9 operate?
Mode-S A8B8B9 has broadcast 20 distinct callsigns, including PDT6080, PDT6016, PDT5813, PDT6119, PDT6062.