Apparatus

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sensors Mode-S transponder

A23B25

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N243AA · operated by FF22 LLC

Hex
A23B25
Octal
50435445
Decimal
10,631,973
Country
US
Tail
N243AA
Type
P28A
Broadcasting now · callsign LFA525 · 1,125 ft
Flights observed
194
Distinct callsigns
1
Country
US
Last broadcast
8m ago

Current position

A23B25 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A23B25 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
LFA525 - 194 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 LFA525 - Jul 14, 16:35 UTCJul 14, 17:15 UTC40m
2026-07-14 LFA525 - Jul 14, 11:30 UTCJul 14, 13:40 UTC2h 10m
2026-07-13 LFA525 - Jul 13, 18:55 UTCJul 13, 19:50 UTC55m
2026-07-13 LFA525 - Jul 13, 16:25 UTCJul 13, 17:10 UTC45m
2026-07-13 LFA525 SFB → SFB Jul 13, 11:00 UTCJul 13, 14:00 UTC3h 0m
2026-07-12 LFA525 SFB → SFB Jul 12, 21:45 UTCJul 12, 23:05 UTC1h 20m
2026-07-12 LFA525 - Jul 12, 13:45 UTCJul 12, 14:45 UTC1h 0m
2026-07-12 LFA525 SFB → SFB Jul 12, 11:50 UTCJul 12, 12:10 UTC20m
2026-07-12 LFA525 - Jul 12, 01:40 UTCJul 12, 02:30 UTC50m
2026-07-11 LFA525 - Jul 11, 20:15 UTCJul 11, 20:55 UTC40m
2026-07-11 LFA525 - Jul 11, 16:30 UTCJul 11, 17:15 UTC45m
2026-07-11 LFA525 - Jul 11, 12:20 UTCJul 11, 12:50 UTC30m
2026-07-11 LFA525 SFB → SFB Jul 11, 11:00 UTCJul 11, 11:40 UTC40m
2026-07-10 LFA525 - Jul 10, 19:10 UTCJul 10, 20:40 UTC1h 30m
2026-07-10 LFA525 - Jul 10, 16:05 UTCJul 10, 17:10 UTC1h 5m
2026-07-10 LFA525 - Jul 10, 13:05 UTCJul 10, 14:50 UTC1h 45m
2026-07-09 LFA525 - Jul 9, 19:45 UTCJul 9, 21:05 UTC1h 20m
2026-07-09 LFA525 - Jul 9, 17:10 UTCJul 9, 18:45 UTC1h 35m
2026-07-09 LFA525 - Jul 9, 14:30 UTCJul 9, 15:20 UTC50m
2026-07-09 LFA525 - Jul 9, 11:45 UTCJul 9, 13:30 UTC1h 45m
2026-07-08 LFA525 - Jul 8, 20:00 UTCJul 8, 21:15 UTC1h 15m
2026-07-08 LFA525 - Jul 8, 16:25 UTCJul 8, 18:25 UTC2h 0m
2026-07-08 LFA525 SFB → SFB Jul 8, 12:35 UTCJul 8, 14:25 UTC1h 50m
2026-07-07 LFA525 - Jul 7, 19:35 UTCJul 7, 20:35 UTC1h 0m
2026-07-07 LFA525 - Jul 7, 15:15 UTCJul 7, 16:05 UTC50m
2026-07-07 LFA525 - Jul 7, 13:55 UTCJul 7, 14:45 UTC50m
2026-07-07 LFA525 - Jul 7, 10:35 UTCJul 7, 12:30 UTC1h 55m
2026-07-06 LFA525 - Jul 6, 21:10 UTCJul 6, 21:55 UTC45m
2026-07-06 LFA525 - Jul 6, 13:30 UTCJul 6, 14:15 UTC45m
2026-07-06 LFA525 SFB → SFB Jul 6, 01:20 UTCJul 6, 01:50 UTC30m
2026-07-05 LFA525 - Jul 5, 15:25 UTCJul 5, 16:50 UTC1h 25m
2026-07-04 LFA525 - Jul 4, 15:30 UTCJul 4, 17:05 UTC1h 35m
2026-07-04 LFA525 - Jul 4, 13:10 UTCJul 4, 14:30 UTC1h 20m
2026-07-03 LFA525 - Jul 3, 21:30 UTCJul 3, 21:45 UTC15m
2026-07-03 LFA525 - Jul 3, 19:05 UTCJul 3, 20:50 UTC1h 45m
2026-07-03 LFA525 SFB → SFB Jul 3, 16:15 UTCJul 3, 17:00 UTC45m
2026-07-03 LFA525 - Jul 3, 14:50 UTCJul 3, 15:35 UTC45m
2026-07-02 LFA525 - Jul 2, 21:10 UTCJul 2, 22:35 UTC1h 25m
2026-07-02 LFA525 SFB → SFB Jul 2, 16:50 UTCJul 2, 18:00 UTC1h 10m
2026-07-02 LFA525 - Jul 2, 11:40 UTCJul 2, 12:50 UTC1h 10m
2026-07-02 LFA525 SFB → SFB Jul 2, 01:45 UTCJul 2, 03:15 UTC1h 30m
2026-07-01 LFA525 SFB → SFB Jul 1, 22:45 UTCJul 2, 00:10 UTC1h 25m
2026-07-01 LFA525 SFB → SFB Jul 1, 19:50 UTCJul 1, 21:30 UTC1h 40m
2026-07-01 LFA525 - Jul 1, 17:15 UTCJul 1, 18:50 UTC1h 35m
2026-07-01 LFA525 - Jul 1, 14:55 UTCJul 1, 16:20 UTC1h 25m
2026-07-01 LFA525 - Jul 1, 11:20 UTCJul 1, 13:30 UTC2h 10m
2026-06-30 LFA525 - Jun 30, 15:40 UTCJun 30, 17:30 UTC1h 50m
2026-06-28 LFA525 - Jun 28, 19:04 UTCJun 28, 20:39 UTC1h 35m
2026-06-28 LFA525 - Jun 28, 16:00 UTCJun 28, 16:39 UTC40m
2026-06-28 LFA525 - Jun 28, 09:55 UTCJun 28, 11:19 UTC1h 25m

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 N243AA page for operator, model, and routing details .

Mode-S A23B25 frequently asked

What is Mode-S code A23B25?
A23B25 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N243AA.
Where is Mode-S A23B25 registered?
Mode-S code A23B25 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 A23B25 broadcasting right now?
Yes. Mode-S A23B25 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A23B25, octal 50435445, decimal 10,631,973.
What flights does A23B25 operate?
Mode-S A23B25 has broadcast 1 distinct callsign, including LFA525.