Apparatus

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sensors Mode-S transponder

AC9C0D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N911TB · AIRBUS HELICOPTERS EC-145 · operated by COOK CHILDREN'S HEALTH ENTERPRISES

Hex
AC9C0D
Octal
53116015
Decimal
11,312,141
Country
US
Tail
N911TB
Type
EC45
No current signal · last broadcast 3d ago
Flights observed
117
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S AC9C0D.

Country allocation

The ICAO 24-bit address AC9C0D 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
N911TB - 117 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N911TB - Jul 16, 02:25 UTCJul 16, 02:35 UTC10m
2026-07-15 N911TB - Jul 15, 23:50 UTCJul 16, 00:05 UTC15m
2026-07-15 N911TB - Jul 15, 00:55 UTCJul 15, 01:30 UTC35m
2026-07-14 N911TB - Jul 14, 21:50 UTCJul 14, 22:00 UTC10m
2026-07-12 N911TB - Jul 12, 09:45 UTCJul 12, 10:35 UTC50m
2026-07-12 N911TB - Jul 12, 07:45 UTCJul 12, 08:15 UTC30m
2026-07-07 N911TB - Jul 7, 05:05 UTCJul 7, 05:30 UTC25m
2026-07-02 N911TB - Jul 2, 17:55 UTCJul 2, 18:15 UTC20m
2026-06-29 N911TB - Jun 29, 23:14 UTCJun 29, 23:25 UTC10m
2026-06-29 N911TB - Jun 29, 21:24 UTCJun 29, 21:34 UTC10m
2026-06-28 N911TB - Jun 28, 21:45 UTCJun 28, 22:10 UTC25m
2026-06-28 N911TB - Jun 28, 19:44 UTCJun 28, 19:59 UTC15m
2026-06-26 N911TB - Jun 26, 16:54 UTCJun 26, 17:19 UTC25m
2026-06-26 N911TB - Jun 26, 15:10 UTCJun 26, 15:25 UTC15m
2026-06-25 N911TB - Jun 25, 22:24 UTCJun 25, 22:34 UTC10m
2026-06-25 N911TB - Jun 25, 20:34 UTCJun 25, 20:54 UTC20m
2026-06-25 N911TB - Jun 25, 18:39 UTCJun 25, 18:55 UTC15m
2026-06-25 N911TB - Jun 25, 17:39 UTCJun 25, 17:54 UTC15m
2026-06-24 N911TB - Jun 24, 22:49 UTCJun 24, 23:20 UTC30m
2026-06-24 N911TB - Jun 24, 18:29 UTCJun 24, 18:50 UTC20m
2026-06-24 N911TB - Jun 24, 17:40 UTCJun 24, 17:55 UTC15m
2026-06-24 N911TB - Jun 24, 15:24 UTCJun 24, 15:49 UTC25m
2026-06-23 N911TB - Jun 23, 08:09 UTCJun 23, 08:45 UTC35m
2026-06-23 N911TB - Jun 23, 06:55 UTCJun 23, 07:15 UTC20m
2026-06-21 N911TB - Jun 21, 05:35 UTCJun 21, 05:59 UTC25m
2026-06-21 N911TB - Jun 21, 03:30 UTCJun 21, 03:44 UTC15m
2026-06-20 N911TB - Jun 20, 23:29 UTCJun 21, 00:10 UTC40m
2026-06-20 N911TB - Jun 20, 22:00 UTCJun 20, 22:54 UTC55m
2026-06-18 N911TB - Jun 18, 22:45 UTCJun 18, 23:40 UTC55m
2026-06-17 N911TB - Jun 17, 17:25 UTCJun 17, 17:45 UTC20m
2026-06-17 N911TB - Jun 17, 15:40 UTCJun 17, 16:00 UTC20m
2026-06-17 N911TB - Jun 17, 11:40 UTCJun 17, 12:10 UTC30m
2026-06-17 N911TB GLE → FTW Jun 17, 10:00 UTCJun 17, 10:30 UTC30m
2026-06-17 N911TB FTW → AHD Jun 17, 07:00 UTCJun 17, 07:35 UTC35m
2026-06-17 N911TB - Jun 17, 03:55 UTCJun 17, 04:35 UTC40m
2026-06-17 N911TB - Jun 17, 01:35 UTCJun 17, 02:25 UTC50m
2026-06-13 N911TB - Jun 13, 21:10 UTCJun 13, 21:25 UTC15m
2026-06-13 N911TB - Jun 13, 20:05 UTCJun 13, 20:20 UTC15m
2026-06-12 N911TB - Jun 12, 16:10 UTCJun 12, 16:25 UTC15m
2026-06-12 N911TB - Jun 12, 14:35 UTCJun 12, 14:45 UTC10m
2026-06-12 N911TB - Jun 12, 01:20 UTCJun 12, 03:40 UTC2h 20m
2026-06-11 N911TB - Jun 11, 06:45 UTCJun 11, 07:05 UTC20m
2026-06-11 N911TB - Jun 11, 03:40 UTCJun 11, 04:00 UTC20m
2026-06-11 N911TB - Jun 11, 01:40 UTCJun 11, 01:55 UTC15m
2026-06-11 N911TB - Jun 11, 00:15 UTCJun 11, 00:50 UTC35m
2026-06-10 N911TB - Jun 10, 16:10 UTCJun 10, 16:25 UTC15m
2026-06-10 N911TB - Jun 10, 13:50 UTCJun 10, 14:15 UTC25m
2026-06-10 N911TB - Jun 10, 08:30 UTCJun 10, 09:00 UTC30m
2026-06-10 N911TB - Jun 10, 06:30 UTCJun 10, 06:50 UTC20m
2026-06-09 N911TB - Jun 9, 21:10 UTCJun 9, 21:25 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 N911TB page for operator, model, and routing details .

Mode-S AC9C0D frequently asked

What is Mode-S code AC9C0D?
AC9C0D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N911TB.
Where is Mode-S AC9C0D registered?
Mode-S code AC9C0D 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 AC9C0D broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC9C0D, octal 53116015, decimal 11,312,141.
What flights does AC9C0D operate?
Mode-S AC9C0D has broadcast 1 distinct callsign, including N911TB.