Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A979F0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N71CK · LEARJET 35 · operated by KALITTA CHARTERS LLC

Hex
A979F0
Octal
52274760
Decimal
11,106,800
Country
US
Tail
N71CK
Type
LJ35
No current signal · last broadcast 14d ago
Flights observed
31
Distinct callsigns
5
Country
US
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S A979F0.

Country allocation

The ICAO 24-bit address A979F0 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
KFS42 Kalitta Charters 17 2026-06-29
KFS55 Kalitta Charters 6 2026-06-21
KFS77 - 3 2026-06-26
KFS57 Kalitta Charters 3 2026-05-27
KFS23 Kalitta Charters 2 2026-06-04

Recent flights last 31

DateFlightRouteTakeoffLandingDuration
2026-06-29 KFS42 CVG → IAG Jun 29, 16:44 UTCJun 29, 20:04 UTC3h 20m
2026-06-28 KFS42 CVG → IAG Jun 28, 22:39 UTCJun 29, 00:29 UTC1h 50m
2026-06-28 KFS42 CVG → IAG Jun 28, 06:20 UTCJun 28, 08:29 UTC2h 10m
2026-06-28 KFS42 CVG → IAG Jun 28, 02:44 UTCJun 28, 05:15 UTC2h 30m
2026-06-27 KFS42 CVG → IAG Jun 27, 22:35 UTCJun 28, 01:19 UTC2h 45m
2026-06-27 KFS42 CVG → IAG Jun 27, 04:49 UTCJun 27, 07:10 UTC2h 20m
2026-06-27 KFS42 CVG → IAG Jun 27, 00:25 UTCJun 27, 03:49 UTC3h 25m
2026-06-26 KFS42 CVG → IAG Jun 26, 19:30 UTCJun 26, 20:40 UTC1h 10m
2026-06-26 KFS77 - Jun 26, 05:10 UTCJun 26, 06:50 UTC1h 40m
2026-06-26 KFS77 TEB → RDU Jun 26, 02:44 UTCJun 26, 04:04 UTC1h 20m
2026-06-26 KFS77 - Jun 26, 00:55 UTCJun 26, 02:00 UTC1h 5m
2026-06-21 KFS55 CVG → YIP Jun 21, 05:54 UTCJun 21, 09:10 UTC3h 15m
2026-06-20 KFS55 CVG → YIP Jun 20, 23:14 UTCJun 21, 04:44 UTC5h 30m
2026-06-20 KFS55 CVG → YIP Jun 20, 21:00 UTCJun 20, 22:20 UTC1h 20m
2026-06-13 KFS55 CVG → YIP Jun 13, 14:35 UTCJun 13, 15:15 UTC40m
2026-06-13 KFS55 CVG → YIP Jun 13, 09:55 UTCJun 13, 13:45 UTC3h 50m
2026-06-13 KFS55 CVG → YIP Jun 13, 03:15 UTCJun 13, 08:05 UTC4h 49m
2026-06-09 KFS42 CVG → IAG Jun 9, 20:55 UTCJun 9, 23:25 UTC2h 30m
2026-06-09 KFS42 CVG → IAG Jun 9, 16:45 UTCJun 9, 20:05 UTC3h 20m
2026-06-09 KFS42 CVG → IAG Jun 9, 12:55 UTCJun 9, 14:15 UTC1h 20m
2026-06-04 KFS23 PHL → BDL Jun 4, 14:35 UTCJun 4, 16:05 UTC1h 30m
2026-06-04 KFS23 PHL → BDL Jun 4, 11:35 UTCJun 4, 13:20 UTC1h 45m
2026-06-03 KFS42 CVG → IAG Jun 3, 19:20 UTCJun 3, 20:50 UTC1h 30m
2026-06-03 KFS42 CVG → IAG Jun 3, 15:40 UTCJun 3, 18:00 UTC2h 20m
2026-06-03 KFS42 CVG → IAG Jun 3, 12:55 UTCJun 3, 14:10 UTC1h 15m
2026-06-02 KFS42 CVG → IAG Jun 2, 19:55 UTCJun 2, 22:35 UTC2h 40m
2026-06-02 KFS42 CVG → IAG Jun 2, 16:00 UTCJun 2, 18:45 UTC2h 45m
2026-06-02 KFS42 CVG → IAG Jun 2, 13:30 UTCJun 2, 14:40 UTC1h 10m
2026-05-27 KFS57 MDW → BKL May 27, 18:10 UTCMay 27, 19:10 UTC1h 0m
2026-05-27 KFS57 MDW → BKL May 27, 15:00 UTCMay 27, 17:10 UTC2h 10m
2026-05-27 KFS57 MDW → BKL May 27, 12:20 UTCMay 27, 13:35 UTC1h 15m

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 N71CK page for operator, model, and routing details .

Mode-S A979F0 frequently asked

What is Mode-S code A979F0?
A979F0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N71CK.
Where is Mode-S A979F0 registered?
Mode-S code A979F0 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 A979F0 broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A979F0, octal 52274760, decimal 11,106,800.
What flights does A979F0 operate?
Mode-S A979F0 has broadcast 5 distinct callsigns, including KFS42, KFS55, KFS77, KFS57, KFS23.