Apparatus

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sensors Mode-S transponder

AA1E03

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N751CS · operated by UMB BANK NA TRUSTEE

Hex
AA1E03
Octal
52417003
Decimal
11,148,803
Country
US
Tail
N751CS
Type
B752
No current signal · last broadcast 1h ago
Flights observed
69
Distinct callsigns
11
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AA1E03.

Country allocation

The ICAO 24-bit address AA1E03 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 11 distinct

Callsign Airline Flights Last seen
CSB107 21 Air 20 2026-05-19
CSB507 21 Air 17 2026-05-18
CSB585 21 Air 12 2026-05-29
CSB185 21 Air 12 2026-05-30
CSB1507 - 2 2026-04-15
CSB599 21 Air 1 2026-05-23
CSB2033 21 Air 1 2026-04-25
CSB2032 21 Air 1 2026-04-24
CSB2030 21 Air 1 2026-05-26
CSB2003 21 Air 1 2026-05-26
CSB199 21 Air 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSB185 MSP → CVG May 30, 02:45 UTCMay 30, 04:15 UTC1h 30m
2026-05-29 CSB585 CVG → MSP May 29, 10:35 UTCMay 29, 12:10 UTC1h 35m
2026-05-29 CSB185 MSP → CVG May 29, 03:25 UTCMay 29, 04:45 UTC1h 20m
2026-05-28 CSB585 CVG → MSP May 28, 10:35 UTCMay 28, 12:10 UTC1h 35m
2026-05-28 CSB185 MSP → CVG May 28, 02:55 UTCMay 28, 04:10 UTC1h 15m
2026-05-27 CSB585 CVG → MSP May 27, 10:30 UTCMay 27, 12:05 UTC1h 35m
2026-05-26 CSB2003 MEM → CVG May 26, 15:14 UTCMay 26, 16:10 UTC55m
2026-05-26 CSB2030 MIA → CVG May 26, 11:30 UTCMay 26, 12:40 UTC1h 10m
2026-05-23 CSB199 MIA → CVG May 23, 15:30 UTCMay 23, 17:35 UTC2h 5m
2026-05-23 CSB599 CVG → MIA May 23, 08:05 UTCMay 23, 10:15 UTC2h 10m
2026-05-23 CSB185 MSP → CVG May 23, 02:45 UTCMay 23, 04:10 UTC1h 25m
2026-05-22 CSB585 CVG → MSP May 22, 10:45 UTCMay 22, 12:15 UTC1h 30m
2026-05-22 CSB185 MSP → CVG May 22, 03:05 UTCMay 22, 04:20 UTC1h 15m
2026-05-21 CSB585 CVG → MSP May 21, 10:25 UTCMay 21, 12:00 UTC1h 35m
2026-05-21 CSB185 MSP → CVG May 21, 02:45 UTCMay 21, 04:05 UTC1h 20m
2026-05-20 CSB585 CVG → MSP May 20, 10:50 UTCMay 20, 12:20 UTC1h 30m
2026-05-19 CSB107 HRL → CVG May 19, 02:10 UTCMay 19, 04:30 UTC2h 20m
2026-05-18 CSB507 CVG → HRL May 18, 04:25 UTCMay 18, 06:55 UTC2h 30m
2026-05-16 CSB185 MSP → CVG May 16, 02:35 UTCMay 16, 04:00 UTC1h 25m
2026-05-15 CSB585 CVG → MSP May 15, 10:30 UTCMay 15, 12:05 UTC1h 35m
2026-05-15 CSB107 HRL → CVG May 15, 01:55 UTCMay 15, 04:20 UTC2h 25m
2026-05-14 CSB507 CVG → HRL May 14, 11:01 UTCMay 14, 13:25 UTC2h 25m
2026-05-14 CSB107 HRL → CVG May 14, 02:15 UTCMay 14, 04:45 UTC2h 30m
2026-05-13 CSB507 CVG → HRL May 13, 10:55 UTCMay 13, 13:20 UTC2h 25m
2026-05-12 CSB107 HRL → CVG May 12, 06:50 UTCMay 12, 08:30 UTC1h 40m
2026-05-12 CSB107 HRL → CVG May 12, 02:45 UTCMay 12, 03:25 UTC40m
2026-05-11 CSB507 CVG → HRL May 11, 04:45 UTCMay 11, 07:20 UTC2h 35m
2026-05-09 CSB107 HRL → CVG May 9, 05:35 UTCMay 9, 07:10 UTC1h 35m
2026-05-09 CSB107 HRL → CVG May 9, 02:35 UTCMay 9, 03:45 UTC1h 10m
2026-05-08 CSB507 CVG → HRL May 8, 11:19 UTCMay 8, 14:10 UTC2h 50m
2026-05-08 CSB107 HRL → CVG May 8, 02:35 UTCMay 8, 04:44 UTC2h 10m
2026-05-07 CSB507 CVG → HRL May 7, 11:00 UTCMay 7, 13:45 UTC2h 45m
2026-05-07 CSB185 MSP → CVG May 7, 02:35 UTCMay 7, 03:55 UTC1h 20m
2026-05-06 CSB585 CVG → MSP May 6, 10:30 UTCMay 6, 12:01 UTC1h 30m
2026-05-06 CSB185 MSP → CVG May 6, 02:40 UTCMay 6, 04:10 UTC1h 30m
2026-05-05 CSB585 CVG → MSP May 5, 11:10 UTCMay 5, 12:50 UTC1h 40m
2026-05-05 CSB185 MSP → CVG May 5, 02:45 UTCMay 5, 04:00 UTC1h 15m
2026-05-04 CSB585 CVG → MSP May 4, 06:30 UTCMay 4, 08:05 UTC1h 35m
2026-05-02 CSB107 HRL → CVG May 2, 02:05 UTCMay 2, 04:15 UTC2h 10m
2026-05-01 CSB507 CVG → HRL May 1, 10:55 UTCMay 1, 13:40 UTC2h 45m
2026-05-01 CSB107 HRL → CVG May 1, 02:55 UTCMay 1, 05:15 UTC2h 20m
2026-04-30 CSB507 CVG → HRL Apr 30, 11:05 UTCApr 30, 13:35 UTC2h 30m
2026-04-29 CSB107 HRL → CVG Apr 29, 02:15 UTCApr 29, 04:39 UTC2h 25m
2026-04-28 CSB507 CVG → HRL Apr 28, 11:55 UTCApr 28, 14:25 UTC2h 30m
2026-04-28 CSB107 HRL → CVG Apr 28, 02:20 UTCApr 28, 04:55 UTC2h 35m
2026-04-27 CSB507 CVG → HRL Apr 27, 04:55 UTCApr 27, 07:15 UTC2h 20m
2026-04-25 CSB2033 SLC → CVG Apr 25, 01:55 UTCApr 25, 04:40 UTC2h 45m
2026-04-24 CSB2032 CVG → SLC Apr 24, 12:05 UTCApr 24, 15:30 UTC3h 25m
2026-04-24 CSB107 HRL → CVG Apr 24, 02:10 UTCApr 24, 04:35 UTC2h 25m
2026-04-23 CSB507 CVG → HRL Apr 23, 10:55 UTCApr 23, 13:15 UTC2h 20m

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 N751CS page for operator, model, and routing details .

Mode-S AA1E03 frequently asked

What is Mode-S code AA1E03?
AA1E03 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N751CS.
Where is Mode-S AA1E03 registered?
Mode-S code AA1E03 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 AA1E03 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 AA1E03, octal 52417003, decimal 11,148,803.
What flights does AA1E03 operate?
Mode-S AA1E03 has broadcast 11 distinct callsigns, including CSB107, CSB507, CSB585, CSB185, CSB1507.