Apparatus

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sensors Mode-S transponder

A9CAB4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73WP · CESSNA 172 Skyhawk · operated by GEMINI 3 LLC

Hex
A9CAB4
Octal
52345264
Decimal
11,127,476
Country
US
Tail
N73WP
Type
C172
No current signal · last broadcast Jul 26, 04:20 UTC
Flights observed
91
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 04:20 UTC

Last known position

Most recent position reported by Mode-S A9CAB4.

Country allocation

The ICAO 24-bit address A9CAB4 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
N73WP - 91 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N73WP - Jul 26, 02:00 UTCJul 26, 04:20 UTC2h 20m
2026-07-25 N73WP - Jul 25, 22:35 UTCJul 25, 23:10 UTC35m
2026-07-25 N73WP LUK → MNN Jul 25, 20:55 UTCJul 25, 22:05 UTC1h 10m
2026-07-25 N73WP LUK → LUK Jul 25, 18:25 UTCJul 25, 19:05 UTC40m
2026-07-25 N73WP - Jul 25, 16:45 UTCJul 25, 17:40 UTC55m
2026-07-25 N73WP LUK → LUK Jul 25, 14:10 UTCJul 25, 15:00 UTC50m
2026-07-23 N73WP - Jul 23, 16:20 UTCJul 23, 17:05 UTC45m
2026-07-23 N73WP LUK → LEX Jul 23, 14:30 UTCJul 23, 15:15 UTC45m
2026-07-22 N73WP - Jul 22, 20:45 UTCJul 22, 21:30 UTC45m
2026-07-22 N73WP - Jul 22, 14:50 UTCJul 22, 15:45 UTC55m
2026-07-20 N73WP - Jul 20, 23:10 UTCJul 21, 00:15 UTC1h 5m
2026-07-20 N73WP - Jul 20, 19:50 UTCJul 20, 20:20 UTC30m
2026-07-19 N73WP LUK → LUK Jul 19, 23:10 UTCJul 20, 00:15 UTC1h 5m
2026-07-19 N73WP - Jul 19, 18:50 UTCJul 19, 21:00 UTC2h 10m
2026-07-19 N73WP - Jul 19, 15:55 UTCJul 19, 17:50 UTC1h 55m
2026-07-17 N73WP LUK → LUK Jul 17, 14:44 UTCJul 17, 15:25 UTC40m
2026-07-17 N73WP LUK → LUK Jul 17, 12:30 UTCJul 17, 13:00 UTC30m
2026-07-15 N73WP - Jul 15, 23:25 UTCJul 15, 23:55 UTC30m
2026-07-15 N73WP - Jul 15, 20:55 UTCJul 15, 21:20 UTC25m
2026-07-13 N73WP - Jul 13, 20:00 UTCJul 13, 22:00 UTC2h 0m
2026-07-13 N73WP LUK → LUK Jul 13, 14:30 UTCJul 13, 14:50 UTC20m
2026-07-13 N73WP - Jul 13, 11:55 UTCJul 13, 13:55 UTC2h 0m
2026-07-12 N73WP LUK → LUK Jul 12, 23:00 UTCJul 13, 00:01 UTC1h 0m
2026-07-12 N73WP - Jul 12, 18:40 UTCJul 12, 19:20 UTC40m
2026-07-12 N73WP LUK → LUK Jul 12, 02:55 UTCJul 12, 04:15 UTC1h 20m
2026-07-09 N73WP LUK → LUK Jul 9, 23:25 UTCJul 10, 00:40 UTC1h 15m
2026-07-09 N73WP - Jul 9, 17:35 UTCJul 9, 18:15 UTC40m
2026-07-09 N73WP - Jul 9, 15:45 UTCJul 9, 16:30 UTC45m
2026-07-09 N73WP LUK → LUK Jul 9, 13:55 UTCJul 9, 15:05 UTC1h 10m
2026-07-08 N73WP - Jul 8, 22:30 UTCJul 9, 00:10 UTC1h 40m
2026-07-07 N73WP - Jul 7, 02:40 UTCJul 7, 03:15 UTC35m
2026-07-02 N73WP LUK → LUK Jul 2, 19:00 UTCJul 2, 22:10 UTC3h 10m
2026-07-02 N73WP LUK → LUK Jul 2, 13:15 UTCJul 2, 14:30 UTC1h 15m
2026-07-02 N73WP - Jul 2, 01:15 UTCJul 2, 03:25 UTC2h 10m
2026-07-01 N73WP - Jul 1, 13:40 UTCJul 1, 14:25 UTC45m
2026-07-01 N73WP - Jul 1, 12:10 UTCJul 1, 13:05 UTC55m
2026-06-29 N73WP - Jun 29, 17:05 UTCJun 29, 17:59 UTC55m
2026-06-29 N73WP - Jun 29, 13:09 UTCJun 29, 13:54 UTC45m
2026-06-26 N73WP - Jun 26, 18:39 UTCJun 26, 19:30 UTC50m
2026-06-26 N73WP - Jun 26, 17:15 UTCJun 26, 17:54 UTC40m
2026-06-25 N73WP - Jun 25, 18:10 UTCJun 25, 18:50 UTC40m
2026-06-25 N73WP - Jun 25, 17:14 UTCJun 25, 17:25 UTC10m
2026-06-25 N73WP - Jun 25, 15:34 UTCJun 25, 15:54 UTC20m
2026-06-25 N73WP - Jun 25, 13:35 UTCJun 25, 14:55 UTC1h 20m
2026-06-24 N73WP - Jun 24, 15:39 UTCJun 24, 17:29 UTC1h 50m
2026-06-24 N73WP - Jun 24, 01:55 UTCJun 24, 02:34 UTC40m
2026-06-23 N73WP - Jun 23, 23:14 UTCJun 23, 23:59 UTC45m
2026-06-23 N73WP - Jun 23, 18:50 UTCJun 23, 20:40 UTC1h 50m
2026-06-23 N73WP - Jun 23, 16:35 UTCJun 23, 17:54 UTC1h 20m
2026-06-23 N73WP - Jun 23, 14:59 UTCJun 23, 15:44 UTC45m

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 N73WP page for operator, model, and routing details .

Mode-S A9CAB4 frequently asked

What is Mode-S code A9CAB4?
A9CAB4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73WP.
Where is Mode-S A9CAB4 registered?
Mode-S code A9CAB4 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 A9CAB4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 04:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9CAB4, octal 52345264, decimal 11,127,476.
What flights does A9CAB4 operate?
Mode-S A9CAB4 has broadcast 1 distinct callsign, including N73WP.