Apparatus

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sensors Mode-S transponder

A8023B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N615KJ · CESSNA 525B Citation CJ3 · operated by 615KJ LLC

Hex
A8023B
Octal
52001073
Decimal
11,010,619
Country
US
Tail
N615KJ
Type
C25B
Broadcasting now · callsign SIS61 · 28,000 ft
Flights observed
97
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A8023B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8023B 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
SIS61 - 97 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SIS61 - Jul 26, 22:40 UTCJul 26, 22:45 UTC5m
2026-07-25 SIS61 HWD → VNY Jul 25, 23:00 UTCJul 25, 23:55 UTC55m
2026-07-25 SIS61 - Jul 25, 17:40 UTCJul 25, 18:40 UTC1h 0m
2026-07-25 SIS61 VNY → ONT Jul 25, 15:50 UTCJul 25, 16:05 UTC15m
2026-07-25 SIS61 - Jul 25, 01:25 UTCJul 25, 01:55 UTC30m
2026-07-24 SIS61 VNY → SAN Jul 24, 14:40 UTCJul 24, 15:10 UTC30m
2026-07-20 SIS61 - Jul 20, 17:15 UTCJul 20, 17:35 UTC20m
2026-07-20 SIS61 HWD → ONT Jul 20, 15:20 UTCJul 20, 16:25 UTC1h 5m
2026-07-20 SIS61 VNY → HWD Jul 20, 12:20 UTCJul 20, 13:15 UTC55m
2026-07-14 SIS61 - Jul 14, 15:35 UTCJul 14, 20:05 UTC4h 30m
2026-07-13 SIS61 - Jul 13, 22:40 UTCJul 13, 23:30 UTC50m
2026-07-12 SIS61 - Jul 12, 16:50 UTCJul 12, 18:50 UTC2h 0m
2026-07-12 SIS61 - Jul 12, 14:55 UTCJul 12, 15:20 UTC25m
2026-07-11 SIS61 - Jul 11, 21:55 UTCJul 11, 22:50 UTC55m
2026-07-11 SIS61 - Jul 11, 19:50 UTCJul 11, 20:50 UTC1h 0m
2026-07-11 SIS61 - Jul 11, 17:45 UTCJul 11, 19:05 UTC1h 20m
2026-07-11 SIS61 - Jul 11, 15:00 UTCJul 11, 15:25 UTC25m
2026-07-10 SIS61 - Jul 10, 14:35 UTCJul 10, 16:05 UTC1h 30m
2026-07-10 SIS61 - Jul 10, 11:05 UTCJul 10, 12:30 UTC1h 25m
2026-07-05 SIS61 - Jul 5, 20:45 UTCJul 5, 21:00 UTC15m
2026-07-05 SIS61 - Jul 5, 18:00 UTCJul 5, 19:40 UTC1h 40m
2026-07-05 SIS61 - Jul 5, 14:45 UTCJul 5, 16:20 UTC1h 35m
2026-07-03 SIS61 - Jul 3, 23:00 UTCJul 3, 23:20 UTC20m
2026-07-03 SIS61 - Jul 3, 20:45 UTCJul 3, 22:35 UTC1h 50m
2026-07-01 SIS61 - Jul 1, 19:20 UTCJul 1, 20:50 UTC1h 30m
2026-07-01 SIS61 VNY → SBA Jul 1, 17:15 UTCJul 1, 17:45 UTC30m
2026-06-29 SIS61 HHR → VNY Jun 29, 16:25 UTCJun 29, 16:44 UTC20m
2026-06-29 SIS61 - Jun 29, 15:00 UTCJun 29, 15:49 UTC50m
2026-06-29 SIS61 - Jun 29, 12:45 UTCJun 29, 13:19 UTC35m
2026-06-28 SIS61 - Jun 28, 04:40 UTCJun 28, 05:34 UTC55m
2026-06-28 SIS61 VNY → APC Jun 28, 02:10 UTCJun 28, 03:14 UTC1h 5m
2026-06-19 SIS61 - Jun 19, 23:09 UTCJun 20, 00:09 UTC1h 0m
2026-06-19 SIS61 VNY → APC Jun 19, 14:59 UTCJun 19, 15:59 UTC1h 0m
2026-06-19 SIS61 - Jun 19, 06:49 UTCJun 19, 09:14 UTC2h 25m
2026-06-19 SIS61 - Jun 19, 05:05 UTCJun 19, 05:49 UTC45m
2026-06-19 SIS61 SFO → YLW Jun 19, 02:14 UTCJun 19, 04:19 UTC2h 5m
2026-06-19 SIS61 VNY → SFO Jun 19, 00:00 UTCJun 19, 00:55 UTC54m
2026-06-14 SIS61 SAN → VNY Jun 14, 19:25 UTCJun 14, 20:00 UTC35m
2026-06-14 SIS61 OAK → SAN Jun 14, 17:35 UTCJun 14, 18:50 UTC1h 15m
2026-06-12 SIS61 - Jun 12, 18:25 UTCJun 12, 19:35 UTC1h 10m
2026-06-12 SIS61 - Jun 12, 16:05 UTCJun 12, 16:40 UTC35m
2026-06-11 SIS61 - Jun 11, 18:05 UTCJun 11, 20:20 UTC2h 15m
2026-06-11 SIS61 - Jun 11, 14:30 UTCJun 11, 16:30 UTC2h 0m
2026-06-10 SIS61 - Jun 10, 02:45 UTCJun 10, 03:40 UTC55m
2026-06-10 SIS61 - Jun 10, 01:00 UTCJun 10, 02:00 UTC1h 0m
2026-06-09 SIS61 - Jun 9, 23:10 UTCJun 9, 23:25 UTC15m
2026-06-04 SIS61 - Jun 4, 18:35 UTCJun 4, 19:10 UTC35m
2026-06-04 SIS61 - Jun 4, 14:10 UTCJun 4, 14:45 UTC35m
2026-06-01 SIS61 - Jun 1, 01:00 UTCJun 1, 01:15 UTC15m
2026-05-31 SIS61 - May 31, 23:30 UTCJun 1, 00:30 UTC1h 0m

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 N615KJ page for operator, model, and routing details .

Mode-S A8023B frequently asked

What is Mode-S code A8023B?
A8023B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N615KJ.
Where is Mode-S A8023B registered?
Mode-S code A8023B 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 A8023B broadcasting right now?
Yes. Mode-S A8023B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8023B, octal 52001073, decimal 11,010,619.
What flights does A8023B operate?
Mode-S A8023B has broadcast 1 distinct callsign, including SIS61.