Apparatus

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sensors Mode-S transponder

A2B2A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N273LP · LEARJET 45 · operated by KALITTA CHARTERS LLC

Hex
A2B2A9
Octal
50531251
Decimal
10,662,569
Country
US
Tail
N273LP
Type
LJ45
No current signal · last broadcast 1d ago
Flights observed
48
Distinct callsigns
5
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A2B2A9.

Country allocation

The ICAO 24-bit address A2B2A9 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 5 distinct

Callsign Airline Flights Last seen
KFS77 Kalitta Charters 17 2026-06-12
KFS19 Kalitta Charters 15 2026-05-05
KFS94 Kalitta Charters 7 2026-07-17
KFS17 - 7 2026-07-06
KFS34 Kalitta Charters 2 2026-04-13

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-07-17 KFS94 MDW → YIP Jul 17, 04:29 UTCJul 17, 05:35 UTC1h 5m
2026-07-16 KFS94 - Jul 16, 20:09 UTCJul 16, 21:10 UTC1h 0m
2026-07-15 KFS94 - Jul 15, 17:50 UTCJul 15, 20:35 UTC2h 45m
2026-07-06 KFS17 - Jul 6, 20:20 UTCJul 6, 21:45 UTC1h 25m
2026-07-06 KFS17 - Jul 6, 18:10 UTCJul 6, 19:45 UTC1h 35m
2026-07-03 KFS17 SDF → MKE Jul 3, 17:40 UTCJul 3, 18:00 UTC20m
2026-07-03 KFS17 SDF → MKE Jul 3, 16:50 UTCJul 3, 17:10 UTC20m
2026-06-12 KFS77 - Jun 12, 16:20 UTCJun 12, 17:05 UTC45m
2026-06-12 KFS77 PIA → YIP Jun 12, 00:05 UTCJun 12, 02:05 UTC2h 1m
2026-06-11 KFS77 PIA → YIP Jun 11, 20:50 UTCJun 11, 22:10 UTC1h 20m
2026-06-11 KFS77 PIA → YIP Jun 11, 04:25 UTCJun 11, 04:50 UTC25m
2026-06-11 KFS77 PIA → YIP Jun 11, 00:50 UTCJun 11, 01:00 UTC10m
2026-06-10 KFS77 PIA → YIP Jun 10, 01:55 UTCJun 10, 02:10 UTC15m
2026-06-10 KFS77 PIA → YIP Jun 10, 00:25 UTCJun 10, 01:00 UTC35m
2026-06-09 KFS77 PIA → YIP Jun 9, 18:15 UTCJun 9, 18:40 UTC25m
2026-06-09 KFS77 PIA → YIP Jun 9, 17:00 UTCJun 9, 17:20 UTC20m
2026-06-09 KFS77 PIA → YIP Jun 9, 03:20 UTCJun 9, 03:50 UTC30m
2026-06-09 KFS77 PIA → YIP Jun 9, 01:15 UTCJun 9, 01:50 UTC35m
2026-06-08 KFS77 PIA → YIP Jun 8, 21:30 UTCJun 8, 22:05 UTC35m
2026-06-03 KFS94 MDW → YIP Jun 3, 03:10 UTCJun 3, 03:55 UTC45m
2026-06-02 KFS94 MDW → YIP Jun 2, 19:05 UTCJun 2, 20:05 UTC1h 0m
2026-05-21 KFS94 MDW → YIP May 21, 21:20 UTCMay 21, 22:35 UTC1h 15m
2026-05-21 KFS94 MDW → YIP May 21, 13:55 UTCMay 21, 15:20 UTC1h 25m
2026-05-20 KFS17 SDF → MKE May 20, 19:35 UTCMay 20, 21:15 UTC1h 40m
2026-05-20 KFS17 SDF → MKE May 20, 18:05 UTCMay 20, 19:30 UTC1h 25m
2026-05-20 KFS17 SDF → MKE May 20, 14:10 UTCMay 20, 15:15 UTC1h 5m
2026-05-09 KFS77 PIA → YIP May 9, 15:45 UTCMay 9, 16:55 UTC1h 10m
2026-05-05 KFS19 DAL → YIP May 5, 21:30 UTCMay 5, 22:01 UTC30m
2026-05-05 KFS19 DAL → YIP May 5, 01:05 UTCMay 5, 04:35 UTC3h 30m
2026-05-04 KFS19 DAL → YIP May 4, 16:25 UTCMay 4, 19:05 UTC2h 41m
2026-05-03 KFS19 DAL → YIP May 3, 23:25 UTCMay 3, 23:55 UTC30m
2026-05-03 KFS19 DAL → YIP May 3, 04:20 UTCMay 3, 05:20 UTC1h 0m
2026-05-02 KFS19 DAL → YIP May 2, 20:40 UTCMay 2, 21:45 UTC1h 5m
2026-04-30 KFS19 DAL → YIP Apr 30, 11:15 UTCApr 30, 11:25 UTC10m
2026-04-30 KFS19 DAL → YIP Apr 30, 09:00 UTCApr 30, 10:05 UTC1h 5m
2026-04-30 KFS19 DAL → YIP Apr 30, 01:50 UTCApr 30, 03:10 UTC1h 20m
2026-04-26 KFS19 DAL → YIP Apr 26, 23:35 UTCApr 27, 00:25 UTC50m
2026-04-26 KFS19 DAL → YIP Apr 26, 17:55 UTCApr 26, 18:50 UTC55m
2026-04-23 KFS19 DAL → YIP Apr 23, 06:01 UTCApr 23, 07:05 UTC1h 5m
2026-04-23 KFS19 DAL → YIP Apr 23, 03:10 UTCApr 23, 05:15 UTC2h 5m
2026-04-23 KFS19 DAL → YIP Apr 23, 01:00 UTCApr 23, 02:10 UTC1h 10m
2026-04-22 KFS19 DAL → YIP Apr 22, 20:20 UTCApr 22, 21:20 UTC1h 0m
2026-04-19 KFS77 PIA → YIP Apr 19, 22:15 UTCApr 19, 23:00 UTC45m
2026-04-17 KFS77 PIA → YIP Apr 17, 15:20 UTCApr 17, 15:30 UTC10m
2026-04-17 KFS77 PIA → YIP Apr 17, 14:10 UTCApr 17, 15:15 UTC1h 4m
2026-04-17 KFS77 PIA → YIP Apr 17, 12:30 UTCApr 17, 13:10 UTC40m
2026-04-13 KFS34 RIC → YIP Apr 13, 00:20 UTCApr 13, 01:20 UTC1h 0m
2026-04-12 KFS34 RIC → YIP Apr 12, 23:55 UTCApr 13, 01:20 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 N273LP page for operator, model, and routing details .

Mode-S A2B2A9 frequently asked

What is Mode-S code A2B2A9?
A2B2A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N273LP.
Where is Mode-S A2B2A9 registered?
Mode-S code A2B2A9 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 A2B2A9 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2B2A9, octal 50531251, decimal 10,662,569.
What flights does A2B2A9 operate?
Mode-S A2B2A9 has broadcast 5 distinct callsigns, including KFS77, KFS19, KFS94, KFS17, KFS34.