Apparatus

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sensors Mode-S transponder

A9C52E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N729CA · BOEING 747-400 · operated by AC SPE 6 LLC

Hex
A9C52E
Octal
52342456
Decimal
11,126,062
Country
US
Tail
N729CA
Type
B744
No current signal · last broadcast 1d ago
Flights observed
135
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A9C52E.

Country allocation

The ICAO 24-bit address A9C52E 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
NCR975 - 6 2026-04-13
NCR9729 - 4 2026-05-26
NCR865 - 4 2026-06-22
NCR845 - 4 2026-06-29
NCR802 - 4 2026-07-10
NCR8883 - 3 2026-05-30
NCR8841 - 3 2026-05-15
NCR8818 - 3 2026-05-08
NCR829 National Air Cargo 3 2026-07-02
NCR826 - 3 2026-06-16
NCR817 - 3 2026-04-19
NCR813 - 3 2026-05-23
NCR652 - 3 2026-06-24
NCR609 - 3 2026-06-23
NCR510 - 3 2026-07-03
NCR509 - 3 2026-07-02
NCR503 - 3 2026-06-18
NCR404 - 3 2026-04-21
CMB533 - 3 2026-06-17
NCR885 - 2 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 NCR810 - Jul 13, 03:05 UTCJul 13, 05:45 UTC2h 40m
2026-07-10 NCR802 - Jul 10, 09:20 UTCJul 10, 11:45 UTC2h 25m
2026-07-09 NCR802 - Jul 9, 09:45 UTCJul 10, 09:30 UTC23h 45m
2026-07-09 NCR513 - Jul 9, 04:15 UTCJul 9, 09:50 UTC5h 35m
2026-07-09 NCR513 - Jul 9, 02:35 UTCJul 9, 02:50 UTC15m
2026-07-08 NCR529 - Jul 8, 13:30 UTCJul 8, 13:55 UTC25m
2026-07-07 NCR810 - Jul 7, 04:30 UTCJul 7, 04:55 UTC25m
2026-07-06 NCR821 - Jul 6, 12:45 UTCJul 6, 20:00 UTC7h 15m
2026-07-05 NCR821 - Jul 5, 10:30 UTCJul 5, 20:05 UTC9h 35m
2026-07-04 NCR820 - Jul 4, 23:25 UTCJul 5, 03:10 UTC3h 45m
2026-07-04 NCR885 - Jul 4, 13:10 UTCJul 4, 20:50 UTC7h 40m
2026-07-04 NCR885 - Jul 4, 01:50 UTCJul 4, 05:55 UTC4h 5m
2026-07-03 NCR883 - Jul 3, 20:00 UTCJul 3, 22:30 UTC2h 30m
2026-07-03 NCR510 - Jul 3, 10:40 UTCJul 3, 16:45 UTC6h 5m
2026-07-03 NCR510 - Jul 3, 00:35 UTCJul 3, 06:40 UTC6h 5m
2026-07-02 NCR510 - Jul 2, 23:45 UTCJul 2, 23:55 UTC10m
2026-07-02 NCR509 - Jul 2, 13:05 UTCJul 2, 13:10 UTC5m
2026-07-02 NCR509 - Jul 2, 09:45 UTCJul 2, 10:10 UTC25m
2026-07-02 NCR829 GSP → EMA Jul 2, 02:00 UTCJul 2, 07:25 UTC5h 25m
2026-07-01 NCR829 GSP → EMA Jul 1, 14:55 UTCJul 1, 23:05 UTC8h 10m
2026-07-01 NCR829 GSP → EMA Jul 1, 07:05 UTCJul 1, 11:55 UTC4h 50m
2026-06-30 NCR828 HSV → OST Jun 30, 22:00 UTCJul 1, 00:25 UTC2h 25m
2026-06-30 NCR815 ATL → YVR Jun 30, 14:20 UTCJun 30, 18:50 UTC4h 30m
2026-06-29 NCR845 - Jun 29, 05:45 UTCJun 29, 12:09 UTC6h 25m
2026-06-28 NCR845 ICN → ANC Jun 28, 18:59 UTCJun 29, 02:09 UTC7h 10m
2026-06-28 NCR845 - Jun 28, 13:40 UTCJun 28, 16:25 UTC2h 45m
2026-06-28 NCR845 - Jun 28, 10:39 UTCJun 28, 10:50 UTC10m
2026-06-28 NCR524 - Jun 28, 02:20 UTCJun 28, 05:20 UTC3h 0m
2026-06-27 NCR524 - Jun 27, 08:49 UTCJun 28, 05:20 UTC20h 30m
2026-06-26 NCR884 - Jun 26, 13:40 UTCJun 27, 04:54 UTC15h 15m
2026-06-25 NCR860 - Jun 25, 05:20 UTCJun 25, 12:25 UTC7h 5m
2026-06-24 NCR652 - Jun 24, 04:59 UTCJun 24, 21:29 UTC16h 30m
2026-06-23 NCR609 - Jun 23, 23:34 UTCJun 24, 21:29 UTC21h 55m
2026-06-23 NCR609 - Jun 23, 21:49 UTCJun 24, 21:29 UTC23h 40m
2026-06-23 NCR609 - Jun 23, 20:34 UTCJun 24, 15:39 UTC19h 5m
2026-06-23 NCR823 TLV → PAE Jun 23, 01:59 UTCJun 23, 15:15 UTC13h 15m
2026-06-22 NCR853 PRG → TLV Jun 22, 17:00 UTCJun 22, 20:10 UTC3h 10m
2026-06-22 NCR865 - Jun 22, 03:50 UTCJun 22, 09:49 UTC6h 0m
2026-06-20 NCR890 LGG → GSP Jun 20, 18:54 UTCJun 21, 00:59 UTC6h 5m
2026-06-20 NCR889 - Jun 20, 10:39 UTCJun 20, 14:24 UTC3h 45m
2026-06-19 NCR504 - Jun 19, 07:45 UTCJun 19, 10:35 UTC2h 50m
2026-06-19 NCR504 - Jun 19, 06:54 UTCJun 19, 07:09 UTC15m
2026-06-18 NCR503 - Jun 18, 22:20 UTCJun 18, 22:50 UTC30m
2026-06-18 NCR503 - Jun 18, 12:30 UTCJun 18, 21:45 UTC9h 15m
2026-06-18 NCR503 - Jun 18, 01:30 UTCJun 18, 08:20 UTC6h 50m
2026-06-17 CMB533 - Jun 17, 14:10 UTCJun 17, 21:55 UTC7h 45m
2026-06-17 CMB533 - Jun 17, 04:55 UTCJun 17, 09:20 UTC4h 25m
2026-06-16 CMB533 - Jun 16, 19:05 UTCJun 16, 20:05 UTC1h 1m
2026-06-16 NCR826 AMM → AMM Jun 16, 12:45 UTCJun 16, 12:55 UTC10m
2026-06-15 NCR826 - Jun 15, 22:05 UTCJun 16, 08:20 UTC10h 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 N729CA page for operator, model, and routing details .

Mode-S A9C52E frequently asked

What is Mode-S code A9C52E?
A9C52E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N729CA.
Where is Mode-S A9C52E registered?
Mode-S code A9C52E 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 A9C52E broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9C52E, octal 52342456, decimal 11,126,062.
What flights does A9C52E operate?
Mode-S A9C52E has broadcast 20 distinct callsigns, including NCR975, NCR9729, NCR865, NCR845, NCR802.