Apparatus

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sensors Mode-S transponder

A9F2C6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N740CK · BOEING 747-400 · operated by KALITTA AIR LLC

Hex
A9F2C6
Octal
52371306
Decimal
11,137,734
Country
US
Tail
N740CK
Type
B744
No current signal · last broadcast 1h ago
Flights observed
148
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A9F2C6.

Country allocation

The ICAO 24-bit address A9F2C6 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 20 distinct

Callsign Airline Flights Last seen
CKS9740 Kalitta Air 12 2026-07-02
CKS529 Kalitta Air 9 2026-06-15
CKS961 - 8 2026-06-30
CKS601 - 7 2026-07-08
CMB547 - 6 2026-04-13
CKS960 - 6 2026-06-28
CKS9164 Kalitta Air 6 2026-05-09
CKS811 - 6 2026-07-12
CMB505 - 5 2026-06-13
CKS982 - 4 2026-06-18
CKS981 - 4 2026-06-19
CKS9716 Kalitta Air 4 2026-06-14
CKS936 - 4 2026-07-13
CKS917 - 4 2026-07-10
CKS557 Kalitta Air 4 2026-05-17
CMB164 - 3 2026-05-09
CKS9812 - 3 2026-07-11
CKS918 - 3 2026-07-09
CKS893 - 3 2026-07-06
CKS819 Kalitta Air 3 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CKS936 ANC → ICN Jul 13, 15:45 UTCJul 14, 04:55 UTC13h 10m
2026-07-13 CKS936 - Jul 13, 07:45 UTCJul 13, 13:35 UTC5h 50m
2026-07-12 CKS811 ANC → ORD Jul 12, 23:25 UTCJul 13, 04:35 UTC5h 10m
2026-07-12 CKS811 - Jul 12, 11:35 UTCJul 12, 18:50 UTC7h 15m
2026-07-12 CKS811 - Jul 12, 08:40 UTCJul 12, 09:00 UTC20m
2026-07-11 CKS9812 - Jul 11, 19:00 UTCJul 11, 22:01 UTC3h 0m
2026-07-11 CMB446 - Jul 11, 07:00 UTCJul 11, 15:05 UTC8h 5m
2026-07-11 CMB446 DOV → DOV Jul 11, 06:10 UTCJul 11, 06:20 UTC10m
2026-07-10 CKS9706 JFK → CVG Jul 10, 21:35 UTCJul 10, 23:10 UTC1h 35m
2026-07-10 CKS917 ANC → ORD Jul 10, 13:25 UTCJul 10, 18:50 UTC5h 25m
2026-07-10 CKS917 - Jul 10, 04:00 UTCJul 10, 11:35 UTC7h 35m
2026-07-09 CKS917 - Jul 9, 15:35 UTCJul 10, 11:35 UTC20h 0m
2026-07-09 CKS917 - Jul 9, 14:05 UTCJul 10, 11:35 UTC21h 30m
2026-07-09 CKS918 - Jul 9, 09:35 UTCJul 10, 05:30 UTC19h 55m
2026-07-09 CKS918 - Jul 9, 08:20 UTCJul 10, 05:30 UTC21h 10m
2026-07-08 CKS918 - Jul 8, 22:40 UTCJul 9, 04:20 UTC5h 40m
2026-07-08 CKS601 ANC → ORD Jul 8, 13:20 UTCJul 8, 18:40 UTC5h 20m
2026-07-08 CKS601 ICN → ANC Jul 8, 04:00 UTCJul 8, 11:45 UTC7h 45m
2026-07-07 CKS601 - Jul 7, 22:55 UTCJul 8, 01:50 UTC2h 55m
2026-07-07 CKS601 - Jul 7, 22:05 UTCJul 7, 22:15 UTC10m
2026-07-07 CKS602 - Jul 7, 15:40 UTCJul 7, 16:20 UTC40m
2026-07-06 CKS602 - Jul 6, 23:40 UTCJul 7, 12:55 UTC13h 15m
2026-07-06 CKS893 ANC → ORD Jul 6, 14:50 UTCJul 6, 20:00 UTC5h 10m
2026-07-06 CKS893 ICN → ANC Jul 6, 04:05 UTCJul 6, 11:35 UTC7h 30m
2026-07-06 CKS893 - Jul 6, 01:20 UTCJul 6, 01:45 UTC25m
2026-07-05 CKS894 MIA → ANC Jul 5, 09:50 UTCJul 5, 17:45 UTC7h 55m
2026-07-04 CKS894 MIA → ANC Jul 4, 22:45 UTCJul 5, 04:10 UTC5h 25m
2026-07-02 CKS9740 JFK → CVG Jul 2, 11:45 UTCJul 2, 12:20 UTC35m
2026-06-30 CKS961 ANC → ORD Jun 30, 23:10 UTCJul 1, 04:40 UTC5h 30m
2026-06-30 CKS961 - Jun 30, 11:05 UTCJun 30, 18:30 UTC7h 25m
2026-06-29 CKS961 ICN → ICN Jun 29, 14:14 UTCJun 29, 18:10 UTC3h 55m
2026-06-28 CKS960 - Jun 28, 20:25 UTCJun 29, 11:39 UTC15h 15m
2026-06-28 CKS960 - Jun 28, 13:34 UTCJun 28, 18:25 UTC4h 50m
2026-06-28 CKS961D - Jun 28, 06:24 UTCJun 28, 10:35 UTC4h 10m
2026-06-27 CKS961D ICN → ANC Jun 27, 19:34 UTCJun 28, 02:39 UTC7h 5m
2026-06-27 CKS960D ANC → ICN Jun 27, 03:09 UTCJun 27, 17:29 UTC14h 20m
2026-06-26 CKS960D - Jun 26, 18:20 UTCJun 26, 23:09 UTC4h 50m
2026-06-26 CKS961 - Jun 26, 11:34 UTCJun 26, 15:45 UTC4h 10m
2026-06-26 CKS961 ICN → ANC Jun 26, 02:30 UTCJun 26, 09:55 UTC7h 25m
2026-06-25 CKS960 LAX → ANC Jun 25, 10:30 UTCJun 26, 00:05 UTC13h 35m
2026-06-25 CKS960 LAX → ANC Jun 25, 01:44 UTCJun 25, 08:20 UTC6h 35m
2026-06-24 CKS935 ANC → JFK Jun 24, 15:05 UTCJun 24, 21:44 UTC6h 40m
2026-06-23 CKS935 ICN → ANC Jun 23, 14:25 UTCJun 23, 22:25 UTC8h 0m
2026-06-22 CKS936 ANC → ICN Jun 22, 19:34 UTCJun 23, 10:44 UTC15h 10m
2026-06-22 CKS936 ORD → ANC Jun 22, 05:49 UTCJun 22, 11:24 UTC5h 35m
2026-06-21 CKS811D ANC → ORD Jun 21, 14:40 UTCJun 21, 20:00 UTC5h 20m
2026-06-21 CKS811D ICN → ANC Jun 21, 05:15 UTCJun 21, 12:49 UTC7h 35m
2026-06-21 CKS811D - Jun 21, 02:30 UTCJun 21, 02:55 UTC25m
2026-06-20 CKS812D - Jun 20, 13:19 UTCJun 20, 21:14 UTC7h 55m
2026-06-20 CKS812D - Jun 20, 02:40 UTCJun 20, 07:09 UTC4h 30m

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 N740CK page for operator, model, and routing details .

Mode-S A9F2C6 frequently asked

What is Mode-S code A9F2C6?
A9F2C6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N740CK.
Where is Mode-S A9F2C6 registered?
Mode-S code A9F2C6 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 A9F2C6 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 A9F2C6, octal 52371306, decimal 11,137,734.
What flights does A9F2C6 operate?
Mode-S A9F2C6 has broadcast 20 distinct callsigns, including CKS9740, CKS529, CKS961, CKS601, CMB547.