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sensors Mode-S transponder

AC490C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N891AA · BEECH 90 King Air · operated by AUGUSTA AVIATION INC

Hex
AC490C
Octal
53044414
Decimal
11,290,892
Country
US
Tail
N891AA
Type
BE9L
Broadcasting now · callsign N891AA · 3,875 ft
Flights observed
161
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 02:30 UTC

Current position

AC490C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC490C 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
N891AA - 161 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N891AA DNL → DNL Jul 22, 01:55 UTCJul 22, 02:30 UTC35m
2026-07-22 N891AA - Jul 22, 01:35 UTCJul 22, 01:50 UTC15m
2026-07-21 N891AA - Jul 21, 18:10 UTCJul 21, 19:00 UTC50m
2026-07-20 N891AA - Jul 20, 11:40 UTCJul 20, 12:45 UTC1h 5m
2026-07-19 N891AA - Jul 19, 13:35 UTCJul 19, 14:50 UTC1h 15m
2026-07-19 N891AA - Jul 19, 10:10 UTCJul 19, 11:20 UTC1h 10m
2026-07-18 N891AA SAV → DNL Jul 18, 19:50 UTCJul 18, 20:25 UTC35m
2026-07-18 N891AA - Jul 18, 13:00 UTCJul 18, 13:30 UTC30m
2026-07-17 N891AA SAV → DNL Jul 17, 20:10 UTCJul 17, 20:44 UTC35m
2026-07-17 N891AA - Jul 17, 15:35 UTCJul 17, 16:04 UTC30m
2026-07-17 N891AA SAV → DNL Jul 17, 14:10 UTCJul 17, 14:44 UTC35m
2026-07-17 N891AA - Jul 17, 11:25 UTCJul 17, 12:25 UTC1h 0m
2026-07-17 N891AA - Jul 17, 10:05 UTCJul 17, 10:40 UTC35m
2026-07-16 N891AA - Jul 16, 17:45 UTCJul 16, 19:14 UTC1h 30m
2026-07-16 N891AA SAV → DNL Jul 16, 14:20 UTCJul 16, 14:50 UTC30m
2026-07-16 N891AA - Jul 16, 12:00 UTCJul 16, 12:30 UTC30m
2026-07-15 N891AA - Jul 15, 18:30 UTCJul 15, 19:15 UTC45m
2026-07-15 N891AA - Jul 15, 15:55 UTCJul 15, 17:15 UTC1h 20m
2026-07-15 N891AA - Jul 15, 13:55 UTCJul 15, 14:55 UTC1h 0m
2026-07-15 N891AA - Jul 15, 04:00 UTCJul 15, 04:40 UTC40m
2026-07-15 N891AA - Jul 15, 01:55 UTCJul 15, 02:50 UTC55m
2026-07-14 N891AA - Jul 14, 13:50 UTCJul 14, 15:35 UTC1h 45m
2026-07-14 N891AA - Jul 14, 11:35 UTCJul 14, 12:30 UTC55m
2026-07-13 N891AA - Jul 13, 20:25 UTCJul 13, 21:00 UTC35m
2026-07-13 N891AA PDK → SAV Jul 13, 18:20 UTCJul 13, 19:25 UTC1h 5m
2026-07-13 N891AA - Jul 13, 16:20 UTCJul 13, 17:30 UTC1h 10m
2026-07-13 N891AA VLD → SAV Jul 13, 12:30 UTCJul 13, 13:15 UTC45m
2026-07-13 N891AA - Jul 13, 10:05 UTCJul 13, 11:00 UTC55m
2026-07-11 N891AA - Jul 11, 11:10 UTCJul 11, 13:25 UTC2h 15m
2026-07-10 N891AA - Jul 10, 11:30 UTCJul 10, 13:10 UTC1h 40m
2026-07-08 N891AA - Jul 8, 20:20 UTCJul 8, 22:20 UTC2h 0m
2026-07-08 N891AA - Jul 8, 12:00 UTCJul 8, 13:15 UTC1h 15m
2026-07-08 N891AA - Jul 8, 09:00 UTCJul 8, 10:00 UTC1h 0m
2026-07-07 N891AA - Jul 7, 09:35 UTCJul 7, 11:45 UTC2h 10m
2026-07-07 N891AA - Jul 7, 06:35 UTCJul 7, 08:45 UTC2h 10m
2026-07-07 N891AA - Jul 7, 03:05 UTCJul 7, 03:50 UTC45m
2026-07-06 N891AA - Jul 6, 18:50 UTCJul 6, 20:05 UTC1h 15m
2026-07-06 N891AA - Jul 6, 12:30 UTCJul 6, 13:00 UTC30m
2026-07-06 N891AA - Jul 6, 10:55 UTCJul 6, 11:25 UTC30m
2026-07-05 N891AA - Jul 5, 18:50 UTCJul 5, 20:40 UTC1h 50m
2026-07-05 N891AA - Jul 5, 13:45 UTCJul 5, 16:55 UTC3h 10m
2026-07-05 N891AA - Jul 5, 05:15 UTCJul 5, 05:50 UTC35m
2026-07-05 N891AA - Jul 5, 02:45 UTCJul 5, 03:25 UTC40m
2026-07-03 N891AA DNL → DNL Jul 3, 11:40 UTCJul 3, 13:00 UTC1h 20m
2026-07-02 N891AA - Jul 2, 20:20 UTCJul 2, 20:45 UTC25m
2026-07-02 N891AA - Jul 2, 14:20 UTCJul 2, 15:20 UTC1h 0m
2026-07-02 N891AA DNL → PDK Jul 2, 11:35 UTCJul 2, 13:25 UTC1h 50m
2026-07-01 N891AA - Jul 1, 22:00 UTCJul 1, 22:25 UTC25m
2026-07-01 N891AA - Jul 1, 14:15 UTCJul 1, 14:35 UTC20m
2026-07-01 N891AA - Jul 1, 13:10 UTCJul 1, 13:35 UTC25m

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 N891AA page for operator, model, and routing details .

Mode-S AC490C frequently asked

What is Mode-S code AC490C?
AC490C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N891AA.
Where is Mode-S AC490C registered?
Mode-S code AC490C 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 AC490C broadcasting right now?
Yes. Mode-S AC490C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC490C, octal 53044414, decimal 11,290,892.
What flights does AC490C operate?
Mode-S AC490C has broadcast 1 distinct callsign, including N891AA.