Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC0A9A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N875TH · operated by AEROSTAR

Hex
AC0A9A
Octal
53005232
Decimal
11,274,906
Country
US
Tail
N875TH
No current signal · last broadcast Jul 9, 15:55 UTC
Flights observed
86
Distinct callsigns
1
Country
US
Last broadcast
Jul 9, 15:55 UTC

Last known position

Most recent position reported by Mode-S AC0A9A.

Country allocation

The ICAO 24-bit address AC0A9A 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 1 distinct

Callsign Airline Flights Last seen
HBAL821 - 86 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 HBAL821 - Jul 8, 20:35 UTCJul 9, 15:55 UTC19h 20m
2026-07-08 HBAL821 - Jul 8, 18:35 UTCJul 9, 15:55 UTC21h 20m
2026-07-08 HBAL821 - Jul 8, 16:35 UTCJul 9, 15:55 UTC23h 20m
2026-07-08 HBAL821 - Jul 8, 14:35 UTCJul 9, 14:30 UTC23h 55m
2026-07-08 HBAL821 - Jul 8, 12:35 UTCJul 9, 12:30 UTC23h 55m
2026-07-08 HBAL821 - Jul 8, 10:35 UTCJul 9, 10:30 UTC23h 55m
2026-07-08 HBAL821 - Jul 8, 08:35 UTCJul 9, 08:30 UTC23h 55m
2026-07-08 HBAL821 - Jul 8, 06:35 UTCJul 9, 06:30 UTC23h 55m
2026-07-08 HBAL821 - Jul 8, 04:35 UTCJul 9, 04:30 UTC23h 55m
2026-07-08 HBAL821 - Jul 8, 03:45 UTCJul 9, 02:30 UTC22h 45m
2026-07-07 HBAL821 - Jul 7, 21:55 UTCJul 8, 03:40 UTC5h 45m
2026-07-07 HBAL821 - Jul 7, 15:55 UTCJul 7, 21:50 UTC5h 55m
2026-07-06 HBAL821 - Jul 6, 20:35 UTCJul 7, 15:50 UTC19h 15m
2026-07-06 HBAL821 - Jul 6, 18:35 UTCJul 7, 15:50 UTC21h 15m
2026-07-06 HBAL821 - Jul 6, 16:35 UTCJul 7, 15:50 UTC23h 15m
2026-07-06 HBAL821 - Jul 6, 14:35 UTCJul 7, 14:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 12:35 UTCJul 7, 12:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 10:35 UTCJul 7, 10:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 08:35 UTCJul 7, 08:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 06:35 UTCJul 7, 06:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 04:35 UTCJul 7, 04:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 02:35 UTCJul 7, 02:30 UTC23h 55m
2026-07-06 HBAL821 - Jul 6, 00:35 UTCJul 7, 00:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 22:35 UTCJul 6, 22:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 20:35 UTCJul 6, 20:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 18:35 UTCJul 6, 18:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 16:35 UTCJul 6, 16:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 14:35 UTCJul 6, 14:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 12:35 UTCJul 6, 12:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 10:35 UTCJul 6, 10:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 08:35 UTCJul 6, 08:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 06:35 UTCJul 6, 06:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 04:35 UTCJul 6, 04:30 UTC23h 55m
2026-07-05 HBAL821 - Jul 5, 03:05 UTCJul 6, 02:30 UTC23h 25m
2026-07-05 HBAL821 - Jul 5, 00:35 UTCJul 6, 00:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 22:35 UTCJul 5, 22:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 19:05 UTCJul 5, 18:30 UTC23h 25m
2026-07-04 HBAL821 - Jul 4, 16:35 UTCJul 5, 16:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 14:35 UTCJul 5, 14:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 12:35 UTCJul 5, 12:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 10:35 UTCJul 5, 10:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 08:35 UTCJul 5, 08:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 06:35 UTCJul 5, 06:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 04:35 UTCJul 5, 04:30 UTC23h 55m
2026-07-04 HBAL821 - Jul 4, 02:35 UTCJul 5, 01:45 UTC23h 10m
2026-07-04 HBAL821 - Jul 4, 00:35 UTCJul 5, 00:30 UTC23h 55m
2026-07-03 HBAL821 - Jul 3, 22:35 UTCJul 4, 22:30 UTC23h 55m
2026-07-03 HBAL821 - Jul 3, 20:35 UTCJul 4, 20:30 UTC23h 55m
2026-07-03 HBAL821 - Jul 3, 18:35 UTCJul 4, 18:30 UTC23h 55m
2026-07-03 HBAL821 - Jul 3, 16:35 UTCJul 4, 16:30 UTC23h 55m

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 N875TH page for operator, model, and routing details .

Mode-S AC0A9A frequently asked

What is Mode-S code AC0A9A?
AC0A9A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N875TH.
Where is Mode-S AC0A9A registered?
Mode-S code AC0A9A 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 AC0A9A broadcasting right now?
No active broadcast right now. Last signal was Jul 9, 15:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC0A9A, octal 53005232, decimal 11,274,906.
What flights does AC0A9A operate?
Mode-S AC0A9A has broadcast 1 distinct callsign, including HBAL821.