Apparatus

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sensors Mode-S transponder

A9BCF9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N72653 · CESSNA 172R Cutlass RG · operated by ATP AIRCRAFT 2 LLC

Hex
A9BCF9
Octal
52336371
Decimal
11,123,961
Country
US
Tail
N72653
Type
C72R
Broadcasting now · callsign CXK527 · 1,300 ft
Flights observed
134
Distinct callsigns
1
Country
US
Last broadcast
16m ago

Current position

A9BCF9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A9BCF9 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 1 distinct

Callsign Airline Flights Last seen
CXK527 - 134 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CXK527 - Jul 14, 20:00 UTCJul 14, 20:15 UTC15m
2026-07-14 CXK527 - Jul 14, 16:40 UTCJul 14, 18:25 UTC1h 45m
2026-07-14 CXK527 - Jul 14, 16:10 UTCJul 14, 16:25 UTC15m
2026-07-14 CXK527 - Jul 14, 15:20 UTCJul 14, 15:40 UTC20m
2026-07-13 CXK527 - Jul 13, 22:00 UTCJul 13, 23:30 UTC1h 30m
2026-07-13 CXK527 - Jul 13, 16:00 UTCJul 13, 18:00 UTC2h 0m
2026-07-11 CXK527 - Jul 11, 20:45 UTCJul 11, 22:10 UTC1h 25m
2026-07-11 CXK527 - Jul 11, 15:40 UTCJul 11, 16:45 UTC1h 5m
2026-07-10 CXK527 - Jul 10, 21:10 UTCJul 10, 22:50 UTC1h 40m
2026-07-10 CXK527 - Jul 10, 17:10 UTCJul 10, 19:35 UTC2h 25m
2026-07-10 CXK527 - Jul 10, 15:50 UTCJul 10, 16:10 UTC20m
2026-07-10 CXK527 - Jul 10, 01:35 UTCJul 10, 02:20 UTC45m
2026-07-09 CXK527 POC → POC Jul 9, 23:45 UTCJul 10, 00:35 UTC50m
2026-07-09 CXK527 - Jul 9, 21:00 UTCJul 9, 21:55 UTC55m
2026-07-09 CXK527 - Jul 9, 18:25 UTCJul 9, 19:40 UTC1h 15m
2026-07-09 CXK527 - Jul 9, 15:30 UTCJul 9, 16:50 UTC1h 20m
2026-07-08 CXK527 - Jul 8, 23:05 UTCJul 9, 00:05 UTC1h 0m
2026-07-08 CXK527 - Jul 8, 20:40 UTCJul 8, 21:35 UTC55m
2026-07-08 CXK527 - Jul 8, 19:00 UTCJul 8, 19:15 UTC15m
2026-07-08 CXK527 - Jul 8, 18:15 UTCJul 8, 18:40 UTC25m
2026-07-08 CXK527 POC → POC Jul 8, 00:20 UTCJul 8, 01:25 UTC1h 5m
2026-07-07 CXK527 - Jul 7, 19:10 UTCJul 7, 22:10 UTC3h 0m
2026-07-07 CXK527 - Jul 7, 14:05 UTCJul 7, 15:40 UTC1h 35m
2026-07-07 CXK527 - Jul 7, 01:50 UTCJul 7, 03:05 UTC1h 15m
2026-07-04 CXK527 AZA → AZA Jul 4, 13:40 UTCJul 4, 15:10 UTC1h 30m
2026-07-03 CXK527 - Jul 3, 14:25 UTCJul 3, 16:00 UTC1h 35m
2026-07-03 CXK527 AZA → AZA Jul 3, 12:35 UTCJul 3, 13:15 UTC40m
2026-07-03 CXK527 - Jul 3, 11:40 UTCJul 3, 12:00 UTC20m
2026-07-02 CXK527 - Jul 2, 14:20 UTCJul 2, 16:00 UTC1h 40m
2026-07-01 CXK527 AZA → AZA Jul 1, 11:45 UTCJul 1, 12:15 UTC30m
2026-06-30 CXK527 - Jun 30, 14:40 UTCJun 30, 16:10 UTC1h 30m
2026-06-23 CXK527 AZA → AZA Jun 23, 12:29 UTCJun 23, 14:15 UTC1h 45m
2026-06-22 CXK527 AZA → AZA Jun 22, 14:59 UTCJun 22, 17:55 UTC2h 55m
2026-06-22 CXK527 - Jun 22, 12:10 UTCJun 22, 13:44 UTC1h 35m
2026-06-21 CXK527 - Jun 21, 12:44 UTCJun 21, 15:25 UTC2h 40m
2026-06-21 CXK527 AZA → AZA Jun 21, 11:44 UTCJun 21, 12:10 UTC25m
2026-06-19 CXK527 AZA → AZA Jun 19, 11:34 UTCJun 19, 13:14 UTC1h 40m
2026-06-18 CXK527 - Jun 18, 17:21 UTCJun 18, 18:10 UTC49m
2026-06-18 CXK527 - Jun 18, 14:40 UTCJun 18, 16:35 UTC1h 55m
2026-06-17 CXK527 - Jun 17, 17:40 UTCJun 17, 18:45 UTC1h 5m
2026-06-17 CXK527 - Jun 17, 14:10 UTCJun 17, 16:10 UTC2h 0m
2026-06-16 CXK527 - Jun 16, 14:35 UTCJun 16, 16:10 UTC1h 35m
2026-06-14 CXK527 - Jun 14, 14:40 UTCJun 14, 16:00 UTC1h 20m
2026-06-14 CXK527 AZA → AZA Jun 14, 12:50 UTCJun 14, 13:05 UTC15m
2026-06-14 CXK527 AZA → AZA Jun 14, 11:35 UTCJun 14, 12:00 UTC25m
2026-06-13 CXK527 - Jun 13, 17:25 UTCJun 13, 19:00 UTC1h 35m
2026-06-13 CXK527 AZA → AZA Jun 13, 13:40 UTCJun 13, 16:40 UTC3h 0m
2026-06-13 CXK527 AZA → AZA Jun 13, 12:10 UTCJun 13, 12:35 UTC25m
2026-06-13 CXK527 AZA → AZA Jun 13, 03:40 UTCJun 13, 06:20 UTC2h 39m
2026-06-11 CXK527 - Jun 11, 13:35 UTCJun 11, 16:20 UTC2h 45m

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 N72653 page for operator, model, and routing details .

Mode-S A9BCF9 frequently asked

What is Mode-S code A9BCF9?
A9BCF9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N72653.
Where is Mode-S A9BCF9 registered?
Mode-S code A9BCF9 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 A9BCF9 broadcasting right now?
Yes. Mode-S A9BCF9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9BCF9, octal 52336371, decimal 11,123,961.
What flights does A9BCF9 operate?
Mode-S A9BCF9 has broadcast 1 distinct callsign, including CXK527.