Apparatus

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sensors Mode-S transponder

A9AFA0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N723KP · PILATUS PC-12 · operated by KALININ PARTNERS LLC

Hex
A9AFA0
Octal
52327640
Decimal
11,120,544
Country
US
Tail
N723KP
Type
PC12
No current signal · last broadcast Jul 26, 21:05 UTC
Flights observed
463
Distinct callsigns
11
Country
US
Last broadcast
Jul 26, 21:05 UTC

Last known position

Most recent position reported by Mode-S A9AFA0.

Country allocation

The ICAO 24-bit address A9AFA0 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 11 distinct

Callsign Airline Flights Last seen
N723KP - 118 2026-07-15
TDY007 - 73 2026-07-25
TDY1992 - 55 2026-07-24
TDY1288 - 48 2026-07-23
TDY1505 - 47 2026-07-01
TDY1738 - 42 2026-07-20
TDY1111 - 29 2026-06-11
TDY1337 - 21 2026-07-14
TDY1776 - 16 2026-07-26
TDY1989 - 13 2026-06-30
TDY1867 - 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TDY1776 - Jul 26, 19:50 UTCJul 26, 21:05 UTC1h 15m
2026-07-26 TDY1776 BFI → SFF Jul 26, 17:50 UTCJul 26, 18:45 UTC55m
2026-07-25 TDY007 BFI → BFI Jul 25, 00:30 UTCJul 25, 02:55 UTC2h 25m
2026-07-24 TDY007 - Jul 24, 21:05 UTCJul 24, 23:45 UTC2h 40m
2026-07-24 TDY1992 - Jul 24, 18:10 UTCJul 24, 19:20 UTC1h 10m
2026-07-24 TDY1992 - Jul 24, 16:25 UTCJul 24, 17:20 UTC55m
2026-07-24 TDY1992 - Jul 24, 12:55 UTCJul 24, 15:35 UTC2h 40m
2026-07-23 TDY1992 - Jul 23, 19:20 UTCJul 23, 21:15 UTC1h 55m
2026-07-23 TDY1288 - Jul 23, 02:10 UTCJul 23, 02:50 UTC40m
2026-07-23 TDY1288 - Jul 23, 00:40 UTCJul 23, 01:35 UTC55m
2026-07-22 TDY1288 - Jul 22, 23:10 UTCJul 22, 23:55 UTC45m
2026-07-22 TDY1288 BFI → PDX Jul 22, 21:50 UTCJul 22, 22:40 UTC50m
2026-07-22 TDY1776 - Jul 22, 16:35 UTCJul 22, 17:15 UTC40m
2026-07-22 TDY1776 BFI → PDX Jul 22, 15:10 UTCJul 22, 15:55 UTC45m
2026-07-22 TDY1776 - Jul 22, 13:45 UTCJul 22, 14:25 UTC40m
2026-07-22 TDY1776 - Jul 22, 12:20 UTCJul 22, 13:05 UTC45m
2026-07-22 TDY007 - Jul 22, 01:40 UTCJul 22, 02:20 UTC40m
2026-07-22 TDY007 BFI → PDX Jul 22, 00:25 UTCJul 22, 01:10 UTC45m
2026-07-21 TDY007 - Jul 21, 23:00 UTCJul 21, 23:45 UTC45m
2026-07-21 TDY007 - Jul 21, 21:35 UTCJul 21, 22:15 UTC40m
2026-07-21 TDY1992 BFI → BFI Jul 21, 15:10 UTCJul 21, 17:05 UTC1h 55m
2026-07-21 TDY1992 - Jul 21, 12:25 UTCJul 21, 14:20 UTC1h 55m
2026-07-21 TDY1288 - Jul 21, 03:05 UTCJul 21, 04:45 UTC1h 40m
2026-07-21 TDY1288 - Jul 21, 01:35 UTCJul 21, 02:15 UTC40m
2026-07-21 TDY1288 BFI → PDX Jul 21, 00:30 UTCJul 21, 01:10 UTC40m
2026-07-20 TDY1288 - Jul 20, 22:55 UTCJul 20, 23:45 UTC50m
2026-07-20 TDY1288 - Jul 20, 21:35 UTCJul 20, 22:20 UTC45m
2026-07-20 TDY1738 - Jul 20, 17:40 UTCJul 20, 19:15 UTC1h 35m
2026-07-20 TDY1738 - Jul 20, 16:05 UTCJul 20, 16:45 UTC40m
2026-07-20 TDY1738 - Jul 20, 15:10 UTCJul 20, 15:50 UTC40m
2026-07-20 TDY1738 - Jul 20, 13:55 UTCJul 20, 14:30 UTC35m
2026-07-20 TDY1738 BFI → PDX Jul 20, 12:15 UTCJul 20, 13:00 UTC45m
2026-07-20 TDY1288 - Jul 20, 00:50 UTCJul 20, 03:25 UTC2h 35m
2026-07-19 TDY1288 - Jul 19, 23:20 UTCJul 20, 00:05 UTC45m
2026-07-19 TDY1288 BFI → PDX Jul 19, 22:05 UTCJul 19, 22:55 UTC50m
2026-07-19 TDY1776 - Jul 19, 18:05 UTCJul 19, 20:40 UTC2h 35m
2026-07-19 TDY1776 PDX → BFI Jul 19, 16:30 UTCJul 19, 17:15 UTC45m
2026-07-19 TDY1776 BFI → PDX Jul 19, 14:50 UTCJul 19, 15:35 UTC45m
2026-07-18 TDY1738 - Jul 18, 03:15 UTCJul 18, 04:00 UTC45m
2026-07-18 TDY1738 - Jul 18, 02:05 UTCJul 18, 02:50 UTC46m
2026-07-18 TDY1738 - Jul 18, 00:39 UTCJul 18, 01:50 UTC1h 10m
2026-07-17 TDY1738 - Jul 17, 22:05 UTCJul 17, 23:55 UTC1h 50m
2026-07-16 TDY1992 - Jul 16, 19:55 UTCJul 16, 21:10 UTC1h 15m
2026-07-16 TDY1992 - Jul 16, 18:10 UTCJul 16, 19:20 UTC1h 10m
2026-07-15 N723KP - Jul 15, 04:20 UTCJul 15, 05:40 UTC1h 20m
2026-07-14 TDY1337 - Jul 14, 21:45 UTCJul 14, 22:35 UTC50m
2026-07-14 TDY1776 - Jul 14, 16:30 UTCJul 14, 17:10 UTC40m
2026-07-14 TDY1776 BFI → PDX Jul 14, 15:00 UTCJul 14, 15:45 UTC45m
2026-07-14 TDY1776 - Jul 14, 12:30 UTCJul 14, 14:20 UTC1h 50m
2026-07-14 TDY007 - Jul 14, 00:20 UTCJul 14, 02:00 UTC1h 40m

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 N723KP page for operator, model, and routing details .

Mode-S A9AFA0 frequently asked

What is Mode-S code A9AFA0?
A9AFA0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N723KP.
Where is Mode-S A9AFA0 registered?
Mode-S code A9AFA0 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 A9AFA0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9AFA0, octal 52327640, decimal 11,120,544.
What flights does A9AFA0 operate?
Mode-S A9AFA0 has broadcast 11 distinct callsigns, including N723KP, TDY007, TDY1992, TDY1288, TDY1505.