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sensors Mode-S transponder

AC9C57

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N911WA · BELL 407 · operated by MED-TRANS CORP

Hex
AC9C57
Octal
53116127
Decimal
11,312,215
Country
US
Tail
N911WA
Type
B407
No current signal · last broadcast 5d ago
Flights observed
175
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S AC9C57.

Country allocation

The ICAO 24-bit address AC9C57 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
N911WA - 175 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N911WA - Jul 13, 06:45 UTCJul 13, 08:20 UTC1h 35m
2026-07-12 N911WA - Jul 12, 21:15 UTCJul 12, 21:25 UTC10m
2026-07-12 N911WA - Jul 12, 20:25 UTCJul 12, 20:35 UTC10m
2026-07-12 N911WA - Jul 12, 19:30 UTCJul 12, 19:45 UTC15m
2026-07-12 N911WA - Jul 12, 03:05 UTCJul 12, 03:20 UTC15m
2026-07-12 N911WA - Jul 12, 01:40 UTCJul 12, 02:30 UTC50m
2026-07-11 N911WA - Jul 11, 07:35 UTCJul 11, 07:45 UTC10m
2026-07-11 N911WA - Jul 11, 05:40 UTCJul 11, 05:55 UTC15m
2026-07-10 N911WA - Jul 10, 21:15 UTCJul 10, 21:30 UTC15m
2026-07-10 N911WA - Jul 10, 20:15 UTCJul 10, 20:45 UTC30m
2026-07-09 N911WA - Jul 9, 04:15 UTCJul 9, 04:45 UTC30m
2026-07-09 N911WA - Jul 9, 02:55 UTCJul 9, 03:40 UTC45m
2026-07-08 N911WA - Jul 8, 00:40 UTCJul 8, 02:20 UTC1h 40m
2026-07-07 N911WA - Jul 7, 23:25 UTCJul 7, 23:35 UTC10m
2026-07-07 N911WA - Jul 7, 20:40 UTCJul 7, 22:10 UTC1h 30m
2026-07-07 N911WA - Jul 7, 18:25 UTCJul 7, 19:10 UTC45m
2026-07-05 N911WA - Jul 5, 02:15 UTCJul 5, 02:40 UTC25m
2026-07-05 N911WA - Jul 5, 00:55 UTCJul 5, 01:40 UTC45m
2026-07-04 N911WA - Jul 4, 23:55 UTCJul 5, 00:05 UTC10m
2026-07-04 N911WA - Jul 4, 04:25 UTCJul 4, 05:50 UTC1h 25m
2026-07-04 N911WA - Jul 4, 01:20 UTCJul 4, 01:45 UTC25m
2026-07-03 N911WA - Jul 3, 23:25 UTCJul 4, 00:25 UTC1h 0m
2026-07-03 N911WA - Jul 3, 15:10 UTCJul 3, 15:20 UTC10m
2026-07-03 N911WA - Jul 3, 13:55 UTCJul 3, 14:30 UTC35m
2026-07-01 N911WA - Jul 1, 18:25 UTCJul 1, 18:35 UTC10m
2026-07-01 N911WA - Jul 1, 17:45 UTCJul 1, 17:55 UTC10m
2026-07-01 N911WA - Jul 1, 06:50 UTCJul 1, 08:05 UTC1h 15m
2026-07-01 N911WA - Jul 1, 05:40 UTCJul 1, 05:50 UTC10m
2026-06-28 N911WA - Jun 28, 17:34 UTCJun 28, 17:44 UTC10m
2026-06-28 N911WA - Jun 28, 16:05 UTCJun 28, 16:14 UTC10m
2026-06-28 N911WA - Jun 28, 14:54 UTCJun 28, 15:05 UTC10m
2026-06-28 N911WA - Jun 28, 03:14 UTCJun 28, 04:40 UTC1h 25m
2026-06-27 N911WA - Jun 27, 16:59 UTCJun 27, 17:14 UTC15m
2026-06-27 N911WA - Jun 27, 02:04 UTCJun 27, 03:09 UTC1h 5m
2026-06-25 N911WA - Jun 25, 15:24 UTCJun 25, 15:34 UTC10m
2026-06-24 N911WA - Jun 24, 21:00 UTCJun 24, 21:24 UTC25m
2026-06-24 N911WA - Jun 24, 18:50 UTCJun 24, 19:04 UTC15m
2026-06-24 N911WA - Jun 24, 03:29 UTCJun 24, 03:44 UTC15m
2026-06-24 N911WA - Jun 24, 02:40 UTCJun 24, 02:49 UTC10m
2026-06-23 N911WA - Jun 23, 20:29 UTCJun 23, 20:49 UTC20m
2026-06-23 N911WA - Jun 23, 18:25 UTCJun 23, 19:55 UTC1h 30m
2026-06-22 N911WA - Jun 22, 17:55 UTCJun 22, 19:00 UTC1h 5m
2026-06-21 N911WA - Jun 21, 18:25 UTCJun 21, 18:35 UTC10m
2026-06-21 N911WA - Jun 21, 17:24 UTCJun 21, 17:35 UTC10m
2026-06-21 N911WA - Jun 21, 15:34 UTCJun 21, 15:49 UTC15m
2026-06-21 N911WA - Jun 21, 01:35 UTCJun 21, 02:15 UTC40m
2026-06-20 N911WA - Jun 20, 22:45 UTCJun 20, 23:55 UTC1h 10m
2026-06-20 N911WA - Jun 20, 10:59 UTCJun 20, 11:44 UTC45m
2026-06-20 N911WA - Jun 20, 09:59 UTCJun 20, 10:09 UTC10m
2026-06-19 N911WA - Jun 19, 22:49 UTCJun 19, 23:04 UTC15m

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 N911WA page for operator, model, and routing details .

Mode-S AC9C57 frequently asked

What is Mode-S code AC9C57?
AC9C57 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N911WA.
Where is Mode-S AC9C57 registered?
Mode-S code AC9C57 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 AC9C57 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC9C57, octal 53116127, decimal 11,312,215.
What flights does AC9C57 operate?
Mode-S AC9C57 has broadcast 1 distinct callsign, including N911WA.