Apparatus

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sensors Mode-S transponder

AC496B

ICAO 24-bit transponder address · allocated to United States

Hex
AC496B
Octal
53044553
Decimal
11,290,987
Country
US
No current signal · last broadcast 1h ago
Flights observed
81
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AC496B.

Country allocation

The ICAO 24-bit address AC496B 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
N891DW - 81 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N891DW - Jul 15, 17:10 UTCJul 15, 18:35 UTC1h 25m
2026-07-15 N891DW - Jul 15, 14:35 UTCJul 15, 15:45 UTC1h 10m
2026-07-14 N891DW - Jul 14, 14:00 UTCJul 14, 15:35 UTC1h 35m
2026-07-13 N891DW - Jul 13, 14:40 UTCJul 13, 17:00 UTC2h 20m
2026-07-13 N891DW - Jul 13, 14:00 UTCJul 13, 14:10 UTC10m
2026-07-11 N891DW - Jul 11, 15:40 UTCJul 11, 16:15 UTC35m
2026-07-11 N891DW - Jul 11, 13:45 UTCJul 11, 14:10 UTC25m
2026-07-09 N891DW - Jul 9, 13:55 UTCJul 9, 16:15 UTC2h 20m
2026-07-08 N891DW - Jul 8, 17:50 UTCJul 8, 18:10 UTC20m
2026-07-08 N891DW - Jul 8, 16:05 UTCJul 8, 16:30 UTC25m
2026-07-07 N891DW - Jul 7, 19:15 UTCJul 7, 20:50 UTC1h 35m
2026-07-07 N891DW - Jul 7, 14:15 UTCJul 7, 14:30 UTC15m
2026-07-07 N891DW - Jul 7, 13:15 UTCJul 7, 13:35 UTC20m
2026-07-06 N891DW - Jul 6, 16:45 UTCJul 6, 21:25 UTC4h 40m
2026-07-06 N891DW - Jul 6, 14:15 UTCJul 6, 16:00 UTC1h 45m
2026-07-05 N891DW - Jul 5, 19:55 UTCJul 5, 20:05 UTC10m
2026-07-05 N891DW - Jul 5, 02:15 UTCJul 5, 03:10 UTC55m
2026-07-02 N891DW - Jul 2, 19:25 UTCJul 2, 19:40 UTC15m
2026-07-02 N891DW - Jul 2, 16:40 UTCJul 2, 17:10 UTC30m
2026-06-29 N891DW - Jun 29, 19:24 UTCJun 29, 20:30 UTC1h 5m
2026-06-29 N891DW - Jun 29, 16:04 UTCJun 29, 17:55 UTC1h 50m
2026-06-26 N891DW - Jun 26, 19:04 UTCJun 26, 20:20 UTC1h 15m
2026-06-23 N891DW - Jun 23, 16:59 UTCJun 23, 18:45 UTC1h 45m
2026-06-22 N891DW - Jun 22, 15:54 UTCJun 22, 16:34 UTC40m
2026-06-21 N891DW - Jun 21, 01:25 UTCJun 21, 02:15 UTC50m
2026-06-19 N891DW - Jun 19, 15:34 UTCJun 19, 16:14 UTC40m
2026-06-18 N891DW - Jun 18, 15:20 UTCJun 18, 16:30 UTC1h 10m
2026-06-16 N891DW - Jun 16, 22:15 UTCJun 16, 22:40 UTC25m
2026-06-16 N891DW - Jun 16, 20:15 UTCJun 16, 20:35 UTC20m
2026-06-16 N891DW - Jun 16, 17:00 UTCJun 16, 17:35 UTC35m
2026-06-16 N891DW - Jun 16, 16:05 UTCJun 16, 16:15 UTC10m
2026-06-16 N891DW - Jun 16, 15:00 UTCJun 16, 15:35 UTC35m
2026-06-15 N891DW - Jun 15, 18:29 UTCJun 15, 20:15 UTC1h 45m
2026-06-15 N891DW - Jun 15, 15:00 UTCJun 15, 16:24 UTC1h 25m
2026-06-13 N891DW - Jun 13, 16:10 UTCJun 13, 17:05 UTC55m
2026-06-12 N891DW - Jun 12, 22:00 UTCJun 12, 23:25 UTC1h 25m
2026-06-12 N891DW - Jun 12, 18:50 UTCJun 12, 20:20 UTC1h 30m
2026-06-12 N891DW - Jun 12, 15:35 UTCJun 12, 16:55 UTC1h 20m
2026-06-10 N891DW - Jun 10, 16:55 UTCJun 10, 17:30 UTC35m
2026-06-10 N891DW - Jun 10, 15:45 UTCJun 10, 16:20 UTC35m
2026-06-07 N891DW - Jun 7, 16:35 UTCJun 7, 18:55 UTC2h 20m
2026-06-06 N891DW - Jun 6, 14:00 UTCJun 6, 16:14 UTC2h 15m
2026-06-04 N891DW - Jun 4, 18:40 UTCJun 4, 19:55 UTC1h 15m
2026-06-03 N891DW - Jun 3, 17:50 UTCJun 3, 19:10 UTC1h 20m
2026-05-27 N891DW - May 27, 20:45 UTCMay 27, 20:55 UTC10m
2026-05-27 N891DW - May 27, 19:50 UTCMay 27, 20:05 UTC15m
2026-05-27 N891DW - May 27, 18:00 UTCMay 27, 18:50 UTC50m
2026-05-27 N891DW - May 27, 16:50 UTCMay 27, 17:00 UTC10m
2026-05-27 N891DW - May 27, 16:05 UTCMay 27, 16:15 UTC10m
2026-05-26 N891DW - May 26, 20:05 UTCMay 26, 21:09 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.

Mode-S AC496B frequently asked

What is Mode-S code AC496B?
AC496B is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S AC496B registered?
Mode-S code AC496B 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 AC496B broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC496B, octal 53044553, decimal 11,290,987.
What flights does AC496B operate?
Mode-S AC496B has broadcast 1 distinct callsign, including N891DW.