Apparatus

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sensors Mode-S transponder

AA457B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N761CK · BOEING 767-300 · operated by KALITTA AIR LLC

Hex
AA457B
Octal
52442573
Decimal
11,158,907
Country
US
Tail
N761CK
Type
B763
No current signal · last broadcast 12h ago
Flights observed
122
Distinct callsigns
14
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S AA457B.

Country allocation

The ICAO 24-bit address AA457B 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 14 distinct

Callsign Airline Flights Last seen
CSB594 21 Air 22 2026-05-20
CSB129 21 Air 19 2026-05-26
CSB821 21 Air 18 2026-05-29
CSB529 21 Air 18 2026-05-25
CSB421 21 Air 17 2026-05-29
CSB194 21 Air 16 2026-05-21
CSB805 21 Air 2 2026-05-19
CSB405 21 Air 2 2026-05-20
CSB2023 21 Air 2 2026-05-22
CSB1821 21 Air 2 2026-05-03
CSB507 21 Air 1 2026-05-22
CSB2022 21 Air 1 2026-05-21
CSB1421 21 Air 1 2026-05-03
CSB107 21 Air 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSB821 CVG → GSO May 29, 12:55 UTCMay 29, 13:40 UTC45m
2026-05-29 CSB421 GSO → CVG May 29, 04:30 UTCMay 29, 05:25 UTC55m
2026-05-28 CSB821 CVG → GSO May 28, 11:35 UTCMay 28, 12:25 UTC50m
2026-05-28 CSB421 GSO → CVG May 28, 04:20 UTCMay 28, 05:10 UTC50m
2026-05-27 CSB821 CVG → GSO May 27, 11:10 UTCMay 27, 12:00 UTC50m
2026-05-27 CSB421 GSO → CVG May 27, 04:55 UTCMay 27, 05:45 UTC50m
2026-05-26 CSB821 CVG → GSO May 26, 11:05 UTCMay 26, 11:54 UTC50m
2026-05-26 CSB129 ELP → CVG May 26, 01:55 UTCMay 26, 04:35 UTC2h 40m
2026-05-25 CSB529 CVG → ELP May 25, 05:00 UTCMay 25, 07:45 UTC2h 45m
2026-05-23 CSB107 HRL → CVG May 23, 02:05 UTCMay 23, 04:25 UTC2h 20m
2026-05-22 CSB507 CVG → HRL May 22, 11:05 UTCMay 22, 13:35 UTC2h 30m
2026-05-22 CSB2023 MSP → CVG May 22, 05:40 UTCMay 22, 07:25 UTC1h 45m
2026-05-22 CSB2023 MSP → CVG May 22, 03:40 UTCMay 22, 04:10 UTC30m
2026-05-21 CSB2022 MIA → CVG May 21, 10:20 UTCMay 21, 12:30 UTC2h 10m
2026-05-21 CSB194 DEN → CVG May 21, 04:25 UTCMay 21, 06:30 UTC2h 5m
2026-05-21 CSB194 DEN → CVG May 21, 01:45 UTCMay 21, 02:35 UTC50m
2026-05-20 CSB594 CVG → DEN May 20, 14:30 UTCMay 20, 15:30 UTC1h 0m
2026-05-20 CSB594 CVG → DEN May 20, 10:45 UTCMay 20, 13:20 UTC2h 35m
2026-05-20 CSB405 SFO → CVG May 20, 03:20 UTCMay 20, 07:15 UTC3h 56m
2026-05-19 CSB805 CVG → SFO May 19, 10:50 UTCMay 19, 15:40 UTC4h 50m
2026-05-19 CSB421 GSO → CVG May 19, 04:30 UTCMay 19, 05:25 UTC55m
2026-05-18 CSB821 CVG → GSO May 18, 05:05 UTCMay 18, 05:50 UTC45m
2026-05-16 CSB421 GSO → CVG May 16, 04:30 UTCMay 16, 05:20 UTC50m
2026-05-15 CSB821 CVG → GSO May 15, 11:45 UTCMay 15, 12:30 UTC45m
2026-05-15 CSB421 GSO → CVG May 15, 04:30 UTCMay 15, 05:25 UTC55m
2026-05-14 CSB821 CVG → GSO May 14, 11:01 UTCMay 14, 11:45 UTC45m
2026-05-14 CSB421 GSO → CVG May 14, 04:25 UTCMay 14, 05:20 UTC55m
2026-05-13 CSB821 CVG → GSO May 13, 11:10 UTCMay 13, 12:00 UTC50m
2026-05-13 CSB421 GSO → CVG May 13, 04:50 UTCMay 13, 05:45 UTC55m
2026-05-12 CSB821 CVG → GSO May 12, 10:55 UTCMay 12, 11:45 UTC50m
2026-05-12 CSB421 GSO → CVG May 12, 04:50 UTCMay 12, 05:45 UTC55m
2026-05-11 CSB821 CVG → GSO May 11, 04:45 UTCMay 11, 05:30 UTC45m
2026-05-10 CSB194 DEN → CVG May 10, 16:30 UTCMay 10, 18:35 UTC2h 5m
2026-05-10 CSB594 CVG → DEN May 10, 12:00 UTCMay 10, 14:40 UTC2h 40m
2026-05-09 CSB194 DEN → CVG May 9, 04:40 UTCMay 9, 06:45 UTC2h 5m
2026-05-09 CSB194 DEN → CVG May 9, 01:45 UTCMay 9, 02:40 UTC55m
2026-05-08 CSB594 CVG → DEN May 8, 14:55 UTCMay 8, 16:05 UTC1h 10m
2026-05-08 CSB594 CVG → DEN May 8, 10:54 UTCMay 8, 13:35 UTC2h 40m
2026-05-08 CSB194 DEN → CVG May 8, 04:00 UTCMay 8, 05:59 UTC2h 0m
2026-05-08 CSB194 DEN → CVG May 8, 01:49 UTCMay 8, 02:49 UTC1h 0m
2026-05-07 CSB594 CVG → DEN May 7, 14:35 UTCMay 7, 15:45 UTC1h 10m
2026-05-07 CSB594 CVG → DEN May 7, 10:50 UTCMay 7, 13:25 UTC2h 35m
2026-05-07 CSB194 DEN → CVG May 7, 04:30 UTCMay 7, 06:35 UTC2h 5m
2026-05-07 CSB194 DEN → CVG May 7, 02:00 UTCMay 7, 02:55 UTC55m
2026-05-06 CSB594 CVG → DEN May 6, 16:00 UTCMay 6, 17:00 UTC1h 0m
2026-05-06 CSB594 CVG → DEN May 6, 15:35 UTCMay 6, 15:40 UTC5m
2026-05-06 CSB594 CVG → DEN May 6, 10:35 UTCMay 6, 13:15 UTC2h 40m
2026-05-06 CSB194 DEN → CVG May 6, 01:50 UTCMay 6, 04:35 UTC2h 45m
2026-05-05 CSB594 CVG → DEN May 5, 15:10 UTCMay 5, 16:15 UTC1h 5m
2026-05-05 CSB594 CVG → DEN May 5, 11:05 UTCMay 5, 13:55 UTC2h 50m

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 N761CK page for operator, model, and routing details .

Mode-S AA457B frequently asked

What is Mode-S code AA457B?
AA457B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N761CK.
Where is Mode-S AA457B registered?
Mode-S code AA457B 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 AA457B broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA457B, octal 52442573, decimal 11,158,907.
What flights does AA457B operate?
Mode-S AA457B has broadcast 14 distinct callsigns, including CSB594, CSB129, CSB821, CSB529, CSB421.