Apparatus

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sensors Mode-S transponder

A9D66C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N733CK · BOEING 737-400 · operated by KALITTA CHARTERS II LLC

Hex
A9D66C
Octal
52353154
Decimal
11,130,476
Country
US
Tail
N733CK
Type
B734
Broadcasting now · callsign KII517 · 31,925 ft
Flights observed
172
Distinct callsigns
15
Country
US
Last broadcast
Jul 24, 05:10 UTC

Current position

A9D66C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A9D66C 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 15 distinct

Callsign Airline Flights Last seen
KII524 - 54 2026-07-23
KII124 - 52 2026-07-24
KII833 - 14 2026-07-17
KII433 - 14 2026-07-18
KII517 - 8 2026-04-24
KII830 - 6 2026-05-11
KII430 - 6 2026-05-12
KII117 - 5 2026-04-25
KII733 - 4 2026-06-27
KII835 - 2 2026-05-07
KII437 - 2 2026-05-21
KII435 - 2 2026-05-08
KII837 - 1 2026-05-20
KII2023 - 1 2026-05-15
KII2003 - 1 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 KII124 - Jul 24, 04:25 UTCJul 24, 05:10 UTC45m
2026-07-24 KII124 - Jul 24, 02:00 UTCJul 24, 03:00 UTC1h 0m
2026-07-23 KII524 - Jul 23, 13:35 UTCJul 23, 14:35 UTC1h 0m
2026-07-23 KII524 - Jul 23, 12:00 UTCJul 23, 12:50 UTC50m
2026-07-23 KII124 MKE → CVG Jul 23, 04:15 UTCJul 23, 05:15 UTC1h 0m
2026-07-23 KII124 - Jul 23, 02:00 UTCJul 23, 03:05 UTC1h 5m
2026-07-22 KII524 - Jul 22, 13:45 UTCJul 22, 14:35 UTC50m
2026-07-22 KII524 - Jul 22, 12:00 UTCJul 22, 12:50 UTC50m
2026-07-22 KII124 - Jul 22, 03:55 UTCJul 22, 04:45 UTC50m
2026-07-22 KII124 - Jul 22, 01:55 UTCJul 22, 02:55 UTC1h 0m
2026-07-21 KII524 - Jul 21, 13:30 UTCJul 21, 14:25 UTC55m
2026-07-21 KII524 - Jul 21, 11:40 UTCJul 21, 12:35 UTC55m
2026-07-21 KII124 - Jul 21, 04:00 UTCJul 21, 04:50 UTC50m
2026-07-21 KII124 - Jul 21, 02:00 UTCJul 21, 03:00 UTC1h 0m
2026-07-20 KII524 - Jul 20, 10:15 UTCJul 20, 11:10 UTC55m
2026-07-20 KII524 - Jul 20, 08:15 UTCJul 20, 09:10 UTC55m
2026-07-18 KII433 - Jul 18, 03:55 UTCJul 18, 04:55 UTC1h 0m
2026-07-18 KII433 - Jul 18, 02:14 UTCJul 18, 02:50 UTC36m
2026-07-17 KII833 - Jul 17, 14:04 UTCJul 17, 14:39 UTC35m
2026-07-17 KII833 - Jul 17, 12:10 UTCJul 17, 13:10 UTC1h 0m
2026-07-17 KII433 - Jul 17, 03:25 UTCJul 17, 04:29 UTC1h 5m
2026-07-17 KII433 - Jul 17, 02:05 UTCJul 17, 02:45 UTC40m
2026-07-16 KII833 - Jul 16, 14:25 UTCJul 16, 15:00 UTC35m
2026-07-16 KII833 - Jul 16, 12:05 UTCJul 16, 13:05 UTC1h 0m
2026-07-16 KII433 - Jul 16, 04:35 UTCJul 16, 05:35 UTC1h 0m
2026-07-16 KII433 - Jul 16, 03:10 UTCJul 16, 03:50 UTC40m
2026-07-15 KII833 - Jul 15, 14:05 UTCJul 15, 14:45 UTC40m
2026-07-15 KII833 - Jul 15, 11:55 UTCJul 15, 13:00 UTC1h 5m
2026-07-15 KII433 - Jul 15, 03:45 UTCJul 15, 04:50 UTC1h 5m
2026-07-15 KII433 - Jul 15, 02:15 UTCJul 15, 02:55 UTC40m
2026-07-14 KII833 - Jul 14, 13:45 UTCJul 14, 14:25 UTC40m
2026-07-14 KII833 - Jul 14, 12:05 UTCJul 14, 13:00 UTC55m
2026-07-14 KII124 - Jul 14, 04:35 UTCJul 14, 05:35 UTC1h 0m
2026-07-14 KII124 - Jul 14, 02:20 UTCJul 14, 03:30 UTC1h 10m
2026-07-13 KII524 - Jul 13, 10:15 UTCJul 13, 11:05 UTC50m
2026-07-13 KII524 - Jul 13, 07:45 UTCJul 13, 08:30 UTC45m
2026-07-11 KII124 - Jul 11, 04:55 UTCJul 11, 05:50 UTC55m
2026-07-11 KII124 - Jul 11, 01:55 UTCJul 11, 02:55 UTC1h 0m
2026-07-10 KII524 STL → OMA Jul 10, 13:50 UTCJul 10, 14:45 UTC55m
2026-07-10 KII524 - Jul 10, 11:55 UTCJul 10, 12:50 UTC55m
2026-07-10 KII124 - Jul 10, 04:30 UTCJul 10, 05:20 UTC50m
2026-07-10 KII124 - Jul 10, 02:00 UTCJul 10, 03:00 UTC1h 0m
2026-07-09 KII524 - Jul 9, 13:55 UTCJul 9, 14:45 UTC50m
2026-07-09 KII524 - Jul 9, 12:20 UTCJul 9, 13:10 UTC50m
2026-07-09 KII124 - Jul 9, 06:35 UTCJul 9, 08:00 UTC1h 25m
2026-07-08 KII524 - Jul 8, 13:40 UTCJul 8, 14:35 UTC55m
2026-07-08 KII524 - Jul 8, 12:05 UTCJul 8, 12:50 UTC45m
2026-07-08 KII124 - Jul 8, 04:25 UTCJul 8, 05:15 UTC50m
2026-07-08 KII124 - Jul 8, 02:10 UTCJul 8, 03:15 UTC1h 5m
2026-07-07 KII524 - Jul 7, 14:10 UTCJul 7, 15:00 UTC50m

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 N733CK page for operator, model, and routing details .

Mode-S A9D66C frequently asked

What is Mode-S code A9D66C?
A9D66C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N733CK.
Where is Mode-S A9D66C registered?
Mode-S code A9D66C 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 A9D66C broadcasting right now?
Yes. Mode-S A9D66C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D66C, octal 52353154, decimal 11,130,476.
What flights does A9D66C operate?
Mode-S A9D66C has broadcast 15 distinct callsigns, including KII524, KII124, KII833, KII433, KII517.