Apparatus

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sensors Mode-S transponder

A2524F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N249K · operated by FF22 LLC

Hex
A2524F
Octal
50451117
Decimal
10,637,903
Country
US
Tail
N249K
Type
C172
Broadcasting now · callsign N249K · 6,950 ft
Flights observed
142
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Current position

A2524F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A2524F 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
N249K - 142 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N249K - Jul 14, 13:05 UTCJul 14, 13:25 UTC20m
2026-07-13 N249K - Jul 13, 01:10 UTCJul 13, 03:30 UTC2h 20m
2026-07-11 N249K - Jul 11, 21:05 UTCJul 11, 23:15 UTC2h 10m
2026-07-11 N249K - Jul 11, 02:30 UTCJul 11, 03:45 UTC1h 15m
2026-07-10 N249K - Jul 10, 20:55 UTCJul 10, 21:05 UTC10m
2026-07-10 N249K - Jul 10, 16:15 UTCJul 10, 16:40 UTC25m
2026-07-10 N249K - Jul 10, 15:05 UTCJul 10, 15:15 UTC10m
2026-07-10 N249K - Jul 10, 04:05 UTCJul 10, 04:50 UTC45m
2026-07-10 N249K - Jul 10, 02:25 UTCJul 10, 03:10 UTC45m
2026-07-09 N249K - Jul 9, 11:35 UTCJul 9, 11:45 UTC10m
2026-07-08 N249K - Jul 8, 17:30 UTCJul 8, 18:15 UTC45m
2026-07-07 N249K - Jul 7, 18:00 UTCJul 7, 18:10 UTC10m
2026-07-07 N249K - Jul 7, 03:45 UTCJul 7, 05:05 UTC1h 20m
2026-07-06 N249K - Jul 6, 22:15 UTCJul 6, 22:30 UTC15m
2026-07-06 N249K - Jul 6, 19:10 UTCJul 6, 20:45 UTC1h 35m
2026-07-06 N249K - Jul 6, 15:55 UTCJul 6, 17:30 UTC1h 35m
2026-07-05 N249K - Jul 5, 04:10 UTCJul 5, 04:50 UTC40m
2026-07-04 N249K - Jul 4, 21:25 UTCJul 4, 21:50 UTC25m
2026-07-04 N249K - Jul 4, 17:30 UTCJul 4, 17:55 UTC25m
2026-07-04 N249K - Jul 4, 14:10 UTCJul 4, 14:45 UTC35m
2026-07-04 N249K - Jul 4, 04:40 UTCJul 4, 04:55 UTC15m
2026-07-04 N249K - Jul 4, 01:50 UTCJul 4, 02:20 UTC30m
2026-07-03 N249K - Jul 3, 06:00 UTCJul 3, 06:40 UTC40m
2026-07-03 N249K - Jul 3, 04:45 UTCJul 3, 05:30 UTC45m
2026-07-02 N249K - Jul 2, 01:20 UTCJul 2, 01:40 UTC20m
2026-07-01 N249K - Jul 1, 15:50 UTCJul 1, 16:20 UTC30m
2026-07-01 N249K - Jul 1, 14:15 UTCJul 1, 15:45 UTC1h 30m
2026-07-01 N249K - Jul 1, 03:35 UTCJul 1, 04:15 UTC40m
2026-07-01 N249K - Jul 1, 02:35 UTCJul 1, 03:30 UTC55m
2026-06-30 N249K - Jun 30, 01:45 UTCJun 30, 02:30 UTC45m
2026-06-29 N249K - Jun 29, 17:45 UTCJun 29, 18:14 UTC30m
2026-06-27 N249K - Jun 27, 02:29 UTCJun 27, 02:50 UTC20m
2026-06-26 N249K - Jun 26, 03:15 UTCJun 26, 03:50 UTC35m
2026-06-26 N249K - Jun 26, 02:09 UTCJun 26, 02:30 UTC20m
2026-06-25 N249K - Jun 25, 23:44 UTCJun 26, 00:10 UTC25m
2026-06-25 N249K - Jun 25, 21:55 UTCJun 25, 22:45 UTC50m
2026-06-25 N249K - Jun 25, 04:40 UTCJun 25, 05:25 UTC45m
2026-06-25 N249K - Jun 25, 02:19 UTCJun 25, 03:15 UTC55m
2026-06-23 N249K - Jun 23, 18:45 UTCJun 23, 19:04 UTC20m
2026-06-23 N249K - Jun 23, 17:15 UTCJun 23, 17:34 UTC20m
2026-06-22 N249K - Jun 22, 22:10 UTCJun 22, 22:24 UTC15m
2026-06-22 N249K - Jun 22, 20:30 UTCJun 22, 21:25 UTC55m
2026-06-22 N249K - Jun 22, 03:45 UTCJun 22, 04:09 UTC25m
2026-06-21 N249K - Jun 21, 22:20 UTCJun 21, 22:34 UTC15m
2026-06-21 N249K - Jun 21, 18:14 UTCJun 21, 19:09 UTC55m
2026-06-20 N249K - Jun 20, 02:49 UTCJun 20, 03:24 UTC35m
2026-06-19 N249K - Jun 19, 03:29 UTCJun 19, 03:39 UTC10m
2026-06-19 N249K - Jun 19, 02:29 UTCJun 19, 02:45 UTC15m
2026-06-17 N249K - Jun 17, 18:20 UTCJun 17, 18:30 UTC10m
2026-06-16 N249K - Jun 16, 04:25 UTCJun 16, 04:45 UTC20m

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 N249K page for operator, model, and routing details .

Mode-S A2524F frequently asked

What is Mode-S code A2524F?
A2524F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N249K.
Where is Mode-S A2524F registered?
Mode-S code A2524F 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 A2524F broadcasting right now?
Yes. Mode-S A2524F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2524F, octal 50451117, decimal 10,637,903.
What flights does A2524F operate?
Mode-S A2524F has broadcast 1 distinct callsign, including N249K.