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sensors Mode-S transponder

A9B04F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N723SP · CESSNA 172 Skyhawk · operated by ELITE APPROACH LLC

Hex
A9B04F
Octal
52330117
Decimal
11,120,719
Country
US
Tail
N723SP
Type
C172
No current signal · last broadcast Jul 25, 22:55 UTC
Flights observed
205
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 22:55 UTC

Last known position

Most recent position reported by Mode-S A9B04F.

Country allocation

The ICAO 24-bit address A9B04F 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
N723SP - 205 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N723SP - Jul 25, 22:35 UTCJul 25, 22:55 UTC20m
2026-07-25 N723SP - Jul 25, 21:30 UTCJul 25, 22:00 UTC30m
2026-07-25 N723SP SUS → SUS Jul 25, 13:40 UTCJul 25, 14:40 UTC1h 0m
2026-07-24 N723SP - Jul 24, 18:20 UTCJul 24, 19:15 UTC55m
2026-07-23 N723SP - Jul 23, 21:30 UTCJul 23, 22:10 UTC40m
2026-07-23 N723SP - Jul 23, 19:40 UTCJul 23, 20:45 UTC1h 5m
2026-07-23 N723SP SUS → SUS Jul 23, 15:45 UTCJul 23, 16:35 UTC50m
2026-07-22 N723SP SUS → SUS Jul 22, 21:45 UTCJul 22, 22:45 UTC1h 0m
2026-07-21 N723SP - Jul 21, 18:05 UTCJul 21, 19:15 UTC1h 10m
2026-07-21 N723SP - Jul 21, 15:00 UTCJul 21, 16:20 UTC1h 20m
2026-07-21 N723SP - Jul 21, 02:45 UTCJul 21, 03:35 UTC50m
2026-07-18 N723SP - Jul 18, 17:20 UTCJul 18, 18:10 UTC50m
2026-07-18 N723SP - Jul 18, 15:35 UTCJul 18, 16:35 UTC1h 0m
2026-07-18 N723SP - Jul 18, 13:35 UTCJul 18, 14:35 UTC1h 0m
2026-07-17 N723SP SUS → SUS Jul 17, 19:20 UTCJul 17, 20:04 UTC45m
2026-07-17 N723SP - Jul 17, 00:35 UTCJul 17, 01:05 UTC30m
2026-07-16 N723SP - Jul 16, 21:55 UTCJul 16, 22:45 UTC50m
2026-07-15 N723SP - Jul 15, 17:55 UTCJul 15, 18:45 UTC50m
2026-07-14 N723SP - Jul 14, 15:35 UTCJul 14, 16:00 UTC25m
2026-07-14 N723SP - Jul 14, 13:55 UTCJul 14, 14:25 UTC30m
2026-07-13 N723SP - Jul 13, 20:00 UTCJul 13, 20:45 UTC45m
2026-07-13 N723SP - Jul 13, 18:10 UTCJul 13, 19:05 UTC55m
2026-07-13 N723SP SUS → SUS Jul 13, 15:55 UTCJul 13, 16:50 UTC55m
2026-07-13 N723SP SUS → SUS Jul 13, 13:05 UTCJul 13, 14:50 UTC1h 45m
2026-07-10 N723SP - Jul 10, 15:45 UTCJul 10, 16:40 UTC55m
2026-07-09 N723SP - Jul 9, 20:00 UTCJul 9, 20:45 UTC45m
2026-07-09 N723SP SUS → SUS Jul 9, 17:45 UTCJul 9, 18:30 UTC45m
2026-07-09 N723SP - Jul 9, 15:55 UTCJul 9, 16:40 UTC45m
2026-07-08 N723SP SUS → SUS Jul 8, 19:55 UTCJul 8, 20:40 UTC45m
2026-07-08 N723SP - Jul 8, 17:40 UTCJul 8, 18:45 UTC1h 5m
2026-07-08 N723SP - Jul 8, 15:50 UTCJul 8, 16:35 UTC45m
2026-07-08 N723SP SUS → SUS Jul 8, 13:40 UTCJul 8, 14:40 UTC1h 0m
2026-07-08 N723SP SUS → SUS Jul 8, 02:40 UTCJul 8, 04:25 UTC1h 45m
2026-07-07 N723SP - Jul 7, 23:35 UTCJul 8, 00:45 UTC1h 10m
2026-07-07 N723SP SUS → SUS Jul 7, 22:10 UTCJul 7, 22:55 UTC45m
2026-07-07 N723SP - Jul 7, 19:35 UTCJul 7, 20:10 UTC35m
2026-07-07 N723SP - Jul 7, 17:40 UTCJul 7, 18:45 UTC1h 5m
2026-07-07 N723SP SUS → SUS Jul 7, 15:35 UTCJul 7, 16:05 UTC30m
2026-07-07 N723SP - Jul 7, 13:55 UTCJul 7, 14:35 UTC40m
2026-07-07 N723SP - Jul 7, 00:20 UTCJul 7, 00:55 UTC35m
2026-07-06 N723SP SUS → SUS Jul 6, 21:45 UTCJul 6, 23:00 UTC1h 15m
2026-07-06 N723SP SUS → SUS Jul 6, 15:40 UTCJul 6, 16:40 UTC1h 0m
2026-07-06 N723SP - Jul 6, 13:50 UTCJul 6, 14:35 UTC45m
2026-07-04 N723SP - Jul 4, 13:35 UTCJul 4, 14:35 UTC1h 0m
2026-07-04 N723SP - Jul 4, 11:25 UTCJul 4, 12:40 UTC1h 15m
2026-07-03 N723SP SUS → SUS Jul 3, 19:40 UTCJul 3, 20:35 UTC55m
2026-07-03 N723SP - Jul 3, 15:30 UTCJul 3, 16:15 UTC45m
2026-07-02 N723SP - Jul 2, 22:15 UTCJul 2, 22:45 UTC30m
2026-07-02 N723SP - Jul 2, 19:35 UTCJul 2, 20:40 UTC1h 5m
2026-07-02 N723SP - Jul 2, 17:45 UTCJul 2, 18:45 UTC1h 0m

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 N723SP page for operator, model, and routing details .

Mode-S A9B04F frequently asked

What is Mode-S code A9B04F?
A9B04F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N723SP.
Where is Mode-S A9B04F registered?
Mode-S code A9B04F 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 A9B04F broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 22:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9B04F, octal 52330117, decimal 11,120,719.
What flights does A9B04F operate?
Mode-S A9B04F has broadcast 1 distinct callsign, including N723SP.