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sensors Mode-S transponder

AA6CFA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N771CK · BOEING 777-300ER · operated by BANK OF UTAH TRUSTEE

Hex
AA6CFA
Octal
52466372
Decimal
11,169,018
Country
US
Tail
N771CK
Type
B77W
No current signal · last broadcast Jul 26, 19:20 UTC
Flights observed
225
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:20 UTC

Last known position

Most recent position reported by Mode-S AA6CFA.

Country allocation

The ICAO 24-bit address AA6CFA 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
CKS523 Kalitta Air 25 2026-07-25
CKS919 - 22 2026-07-05
CKS979 - 21 2026-07-06
CKS524 Kalitta Air 20 2026-07-26
CKS915 - 19 2026-07-02
CKS217 Kalitta Air 18 2026-04-23
CKS970 - 15 2026-07-05
CKS916 - 15 2026-07-02
CKS910 - 15 2026-07-04
CKS235 Kalitta Air 12 2026-05-10
CKS234 Kalitta Air 11 2026-05-09
CKS216 Kalitta Air 11 2026-04-23
CKS218 Kalitta Air 5 2026-05-03
CKS219 Kalitta Air 4 2026-05-04
CKS254 Kalitta Air 3 2026-05-06
CKS241 Kalitta Air 3 2026-05-07
CKS577 - 2 2026-07-09
CKS9780 - 1 2026-07-07
CKS9771 Kalitta Air 1 2026-05-11
CKS9769 - 1 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CKS524 AMS → LCK Jul 26, 18:45 UTCJul 26, 19:20 UTC35m
2026-07-26 CKS524 AMS → LCK Jul 26, 02:00 UTCJul 26, 15:25 UTC13h 26m
2026-07-25 CKS523 SFO → FCO Jul 25, 15:40 UTCJul 25, 20:50 UTC5h 10m
2026-07-25 CKS523 SFO → FCO Jul 25, 05:55 UTCJul 25, 13:20 UTC7h 25m
2026-07-25 CKS523 SFO → FCO Jul 25, 03:15 UTCJul 25, 04:00 UTC45m
2026-07-25 CKS523 SFO → FCO Jul 25, 00:15 UTCJul 25, 00:25 UTC10m
2026-07-24 CKS524 AMS → LCK Jul 24, 19:00 UTCJul 24, 19:30 UTC30m
2026-07-24 CKS524 AMS → LCK Jul 24, 15:25 UTCJul 24, 16:05 UTC40m
2026-07-23 CKS524 AMS → LCK Jul 23, 22:50 UTCJul 24, 12:50 UTC14h 0m
2026-07-23 CKS523 SFO → FCO Jul 23, 12:50 UTCJul 23, 17:55 UTC5h 5m
2026-07-23 CKS523 SFO → FCO Jul 23, 03:00 UTCJul 23, 10:10 UTC7h 10m
2026-07-22 CKS523 SFO → FCO Jul 22, 23:15 UTCJul 22, 23:55 UTC40m
2026-07-22 CKS523 SFO → FCO Jul 22, 20:10 UTCJul 22, 20:25 UTC15m
2026-07-22 CKS524 AMS → LCK Jul 22, 16:25 UTCJul 22, 16:35 UTC10m
2026-07-22 CKS524 AMS → LCK Jul 22, 12:30 UTCJul 22, 13:10 UTC40m
2026-07-21 CKS524 AMS → LCK Jul 21, 20:15 UTCJul 22, 03:25 UTC7h 10m
2026-07-20 CKS523 ANC → ORD Jul 20, 21:45 UTCJul 21, 02:50 UTC5h 4m
2026-07-20 CKS523 ICN → ANC Jul 20, 11:30 UTCJul 20, 19:05 UTC7h 35m
2026-07-20 CKS523 - Jul 20, 05:45 UTCJul 20, 06:25 UTC40m
2026-07-20 CKS523 - Jul 20, 02:45 UTCJul 20, 02:55 UTC10m
2026-07-19 CKS524 AMS → LCK Jul 19, 18:35 UTCJul 19, 19:15 UTC40m
2026-07-19 CKS524 AMS → LCK Jul 19, 02:50 UTCJul 19, 16:00 UTC13h 10m
2026-07-18 CKS523 ANC → ORD Jul 18, 15:40 UTCJul 18, 20:50 UTC5h 10m
2026-07-18 CKS523 ICN → ANC Jul 18, 05:45 UTCJul 18, 13:10 UTC7h 25m
2026-07-18 CKS523 - Jul 18, 02:05 UTCJul 18, 02:40 UTC35m
2026-07-17 CKS524 AMS → LCK Jul 17, 19:20 UTCJul 17, 19:30 UTC10m
2026-07-17 CKS524 AMS → LCK Jul 17, 16:04 UTCJul 17, 16:34 UTC30m
2026-07-16 CKS524 AMS → LCK Jul 16, 22:49 UTCJul 17, 13:00 UTC14h 10m
2026-07-16 CKS523 ANC → ORD Jul 16, 13:20 UTCJul 16, 18:40 UTC5h 20m
2026-07-16 CKS523 ICN → ANC Jul 16, 02:40 UTCJul 16, 10:10 UTC7h 30m
2026-07-15 CKS523 - Jul 15, 23:25 UTCJul 16, 00:10 UTC45m
2026-07-15 CKS523 - Jul 15, 20:20 UTCJul 15, 20:30 UTC10m
2026-07-15 CKS524 - Jul 15, 16:00 UTCJul 15, 16:15 UTC15m
2026-07-15 CKS524 - Jul 15, 12:40 UTCJul 15, 13:15 UTC35m
2026-07-14 CKS524 ORD → ICN Jul 14, 20:35 UTCJul 15, 10:10 UTC13h 34m
2026-07-13 CKS523 ANC → ORD Jul 13, 13:35 UTCJul 13, 19:00 UTC5h 25m
2026-07-13 CKS523 - Jul 13, 04:20 UTCJul 13, 11:40 UTC7h 20m
2026-07-13 CKS523 - Jul 13, 01:20 UTCJul 13, 01:30 UTC10m
2026-07-12 CKS524 - Jul 12, 18:45 UTCJul 12, 19:25 UTC40m
2026-07-12 CKS524 - Jul 12, 03:25 UTCJul 12, 16:40 UTC13h 15m
2026-07-11 CKS523 ANC → ORD Jul 11, 13:15 UTCJul 11, 18:45 UTC5h 30m
2026-07-11 CKS523 - Jul 11, 02:20 UTCJul 11, 09:55 UTC7h 35m
2026-07-10 CKS523 - Jul 10, 23:15 UTCJul 10, 23:25 UTC10m
2026-07-10 CKS524 - Jul 10, 16:20 UTCJul 10, 16:55 UTC35m
2026-07-09 CKS524 - Jul 9, 22:30 UTCJul 10, 11:20 UTC12h 50m
2026-07-09 CKS9769 - Jul 9, 17:10 UTCJul 9, 17:35 UTC25m
2026-07-09 CKS577 - Jul 9, 12:55 UTCJul 9, 13:15 UTC20m
2026-07-09 CKS577 - Jul 9, 06:05 UTCJul 9, 07:10 UTC1h 5m
2026-07-07 CKS9780 - Jul 7, 12:55 UTCJul 7, 17:05 UTC4h 10m
2026-07-06 CKS979 ANC → ORD Jul 6, 23:00 UTCJul 7, 04:15 UTC5h 15m

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 N771CK page for operator, model, and routing details .

Mode-S AA6CFA frequently asked

What is Mode-S code AA6CFA?
AA6CFA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N771CK.
Where is Mode-S AA6CFA registered?
Mode-S code AA6CFA 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 AA6CFA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA6CFA, octal 52466372, decimal 11,169,018.
What flights does AA6CFA operate?
Mode-S AA6CFA has broadcast 20 distinct callsigns, including CKS523, CKS919, CKS979, CKS524, CKS915.