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sensors Mode-S transponder

A13F3C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N18KH · operated by REXAIR AIRCRAFT LLC

Hex
A13F3C
Octal
50237474
Decimal
10,567,484
Country
US
Tail
N18KH
Type
RV12
No current signal · last broadcast Jul 21, 18:55 UTC
Flights observed
161
Distinct callsigns
1
Country
US
Last broadcast
Jul 21, 18:55 UTC

Last known position

Most recent position reported by Mode-S A13F3C.

Country allocation

The ICAO 24-bit address A13F3C 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
N18KH - 161 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N18KH - Jul 21, 18:15 UTCJul 21, 18:55 UTC40m
2026-07-21 N18KH - Jul 21, 15:35 UTCJul 21, 16:40 UTC1h 5m
2026-07-21 N18KH - Jul 21, 13:30 UTCJul 21, 14:30 UTC1h 0m
2026-07-21 N18KH - Jul 21, 11:45 UTCJul 21, 12:45 UTC1h 0m
2026-07-20 N18KH - Jul 20, 13:50 UTCJul 20, 14:25 UTC35m
2026-07-20 N18KH - Jul 20, 11:30 UTCJul 20, 12:40 UTC1h 10m
2026-07-17 N18KH - Jul 17, 11:50 UTCJul 17, 12:55 UTC1h 5m
2026-07-17 N18KH - Jul 17, 00:30 UTCJul 17, 02:25 UTC1h 55m
2026-07-16 N18KH - Jul 16, 19:30 UTCJul 16, 20:45 UTC1h 15m
2026-07-16 N18KH - Jul 16, 13:34 UTCJul 16, 14:45 UTC1h 10m
2026-07-16 N18KH - Jul 16, 12:00 UTCJul 16, 12:55 UTC55m
2026-07-15 N18KH - Jul 15, 23:05 UTCJul 15, 23:40 UTC35m
2026-07-15 N18KH - Jul 15, 20:55 UTCJul 15, 22:05 UTC1h 10m
2026-07-15 N18KH - Jul 15, 15:45 UTCJul 15, 16:50 UTC1h 5m
2026-07-15 N18KH - Jul 15, 14:00 UTCJul 15, 14:50 UTC50m
2026-07-15 N18KH - Jul 15, 11:50 UTCJul 15, 12:40 UTC50m
2026-07-15 N18KH APF → APF Jul 15, 02:30 UTCJul 15, 02:45 UTC15m
2026-07-14 N18KH - Jul 14, 21:05 UTCJul 14, 22:00 UTC55m
2026-07-14 N18KH APF → APF Jul 14, 17:40 UTCJul 14, 18:55 UTC1h 15m
2026-07-14 N18KH APF → APF Jul 14, 15:50 UTCJul 14, 16:35 UTC45m
2026-07-13 N18KH - Jul 13, 20:55 UTCJul 13, 21:45 UTC50m
2026-07-13 N18KH APF → APF Jul 13, 17:55 UTCJul 13, 18:50 UTC55m
2026-07-13 N18KH - Jul 13, 15:30 UTCJul 13, 16:50 UTC1h 20m
2026-07-13 N18KH - Jul 13, 11:40 UTCJul 13, 13:20 UTC1h 40m
2026-07-12 N18KH - Jul 12, 15:45 UTCJul 12, 16:40 UTC55m
2026-07-12 N18KH - Jul 12, 14:05 UTCJul 12, 15:01 UTC55m
2026-07-12 N18KH - Jul 12, 11:30 UTCJul 12, 13:15 UTC1h 45m
2026-07-11 N18KH - Jul 11, 18:35 UTCJul 11, 19:40 UTC1h 5m
2026-07-11 N18KH APF → APF Jul 11, 14:35 UTCJul 11, 15:10 UTC35m
2026-07-11 N18KH - Jul 11, 12:30 UTCJul 11, 13:30 UTC1h 0m
2026-07-10 N18KH - Jul 10, 23:30 UTCJul 11, 00:15 UTC45m
2026-07-10 N18KH - Jul 10, 16:00 UTCJul 10, 17:40 UTC1h 40m
2026-07-09 N18KH - Jul 9, 19:50 UTCJul 9, 20:40 UTC50m
2026-07-09 N18KH - Jul 9, 11:40 UTCJul 9, 12:50 UTC1h 10m
2026-07-08 N18KH - Jul 8, 20:50 UTCJul 8, 21:55 UTC1h 5m
2026-07-08 N18KH - Jul 8, 18:55 UTCJul 8, 19:55 UTC1h 0m
2026-07-08 N18KH - Jul 8, 13:55 UTCJul 8, 14:50 UTC55m
2026-07-07 N18KH - Jul 7, 18:55 UTCJul 7, 19:20 UTC25m
2026-07-06 N18KH - Jul 6, 20:10 UTCJul 6, 21:15 UTC1h 5m
2026-07-06 N18KH - Jul 6, 17:55 UTCJul 6, 18:45 UTC50m
2026-07-06 N18KH - Jul 6, 15:35 UTCJul 6, 16:55 UTC1h 20m
2026-07-05 N18KH - Jul 5, 13:20 UTCJul 5, 14:35 UTC1h 15m
2026-07-04 N18KH APF → APF Jul 4, 13:35 UTCJul 4, 15:20 UTC1h 45m
2026-07-03 N18KH - Jul 3, 23:05 UTCJul 3, 23:40 UTC35m
2026-07-03 N18KH - Jul 3, 19:35 UTCJul 3, 20:45 UTC1h 10m
2026-07-03 N18KH - Jul 3, 13:40 UTCJul 3, 14:35 UTC55m
2026-07-02 N18KH - Jul 2, 17:50 UTCJul 2, 18:55 UTC1h 5m
2026-07-02 N18KH - Jul 2, 16:05 UTCJul 2, 16:40 UTC35m
2026-07-02 N18KH - Jul 2, 13:45 UTCJul 2, 14:50 UTC1h 5m
2026-07-02 N18KH - Jul 2, 12:20 UTCJul 2, 13:00 UTC40m

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 N18KH page for operator, model, and routing details .

Mode-S A13F3C frequently asked

What is Mode-S code A13F3C?
A13F3C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N18KH.
Where is Mode-S A13F3C registered?
Mode-S code A13F3C 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 A13F3C broadcasting right now?
No active broadcast right now. Last signal was Jul 21, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13F3C, octal 50237474, decimal 10,567,484.
What flights does A13F3C operate?
Mode-S A13F3C has broadcast 1 distinct callsign, including N18KH.