Apparatus

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sensors Mode-S transponder

AB3CD9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N823JS · operated by AERO HARBOR NC LL

Hex
AB3CD9
Octal
52636331
Decimal
11,222,233
Country
US
Tail
N823JS
Type
C56X
No current signal · last broadcast 6h ago
Flights observed
87
Distinct callsigns
1
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AB3CD9.

Country allocation

The ICAO 24-bit address AB3CD9 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
JRE823 - 87 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 JRE823 - Jun 24, 23:45 UTCJun 24, 23:59 UTC15m
2026-06-24 JRE823 BOS → TEB Jun 24, 21:24 UTCJun 24, 22:19 UTC55m
2026-06-24 JRE823 BOS → BOS Jun 24, 20:54 UTCJun 24, 21:00 UTC5m
2026-06-24 JRE823 BED → BOS Jun 24, 19:24 UTCJun 24, 19:39 UTC15m
2026-06-24 JRE823 - Jun 24, 15:09 UTCJun 24, 18:20 UTC3h 10m
2026-06-23 JRE823 - Jun 23, 20:24 UTCJun 23, 22:49 UTC2h 25m
2026-06-23 JRE823 TEB → DAL Jun 23, 15:24 UTCJun 23, 19:04 UTC3h 40m
2026-06-23 JRE823 - Jun 23, 13:05 UTCJun 23, 14:10 UTC1h 5m
2026-06-21 JRE823 - Jun 21, 22:44 UTCJun 21, 23:55 UTC1h 10m
2026-06-21 JRE823 - Jun 21, 20:00 UTCJun 21, 21:44 UTC1h 45m
2026-06-21 JRE823 - Jun 21, 18:44 UTCJun 21, 19:00 UTC15m
2026-06-21 JRE823 - Jun 21, 17:35 UTCJun 21, 17:54 UTC20m
2026-06-21 JRE823 - Jun 21, 14:44 UTCJun 21, 15:40 UTC55m
2026-06-18 JRE823 - Jun 18, 14:55 UTCJun 18, 15:20 UTC25m
2026-06-17 JRE823 - Jun 17, 23:15 UTCJun 18, 01:50 UTC2h 35m
2026-06-17 JRE823 - Jun 17, 20:20 UTCJun 17, 21:25 UTC1h 5m
2026-06-17 JRE823 - Jun 17, 16:20 UTCJun 17, 18:45 UTC2h 25m
2026-06-16 JRE823 GEG → YYC Jun 16, 22:40 UTCJun 16, 23:35 UTC55m
2026-06-16 JRE823 - Jun 16, 16:35 UTCJun 16, 20:00 UTC3h 26m
2026-06-16 JRE823 - Jun 16, 13:44 UTCJun 16, 15:35 UTC1h 50m
2026-06-15 JRE823 - Jun 15, 19:00 UTCJun 15, 22:10 UTC3h 10m
2026-06-10 JRE823 - Jun 10, 21:35 UTCJun 10, 23:10 UTC1h 35m
2026-06-10 JRE823 - Jun 10, 18:50 UTCJun 10, 19:40 UTC50m
2026-06-10 JRE823 - Jun 10, 14:55 UTCJun 10, 17:00 UTC2h 5m
2026-06-09 JRE823 - Jun 9, 22:30 UTCJun 9, 23:10 UTC40m
2026-06-09 JRE823 - Jun 9, 16:45 UTCJun 9, 20:30 UTC3h 45m
2026-06-09 JRE823 - Jun 9, 14:00 UTCJun 9, 15:10 UTC1h 10m
2026-06-09 JRE823 - Jun 9, 11:50 UTCJun 9, 13:10 UTC1h 20m
2026-06-08 JRE823 - Jun 8, 16:35 UTCJun 8, 18:00 UTC1h 25m
2026-06-07 JRE823 - Jun 7, 21:30 UTCJun 7, 23:20 UTC1h 50m
2026-06-07 JRE823 - Jun 7, 19:20 UTCJun 7, 20:45 UTC1h 25m
2026-06-07 JRE823 - Jun 7, 16:45 UTCJun 7, 17:50 UTC1h 5m
2026-06-05 JRE823 - Jun 5, 19:40 UTCJun 5, 20:35 UTC55m
2026-06-05 JRE823 - Jun 5, 15:20 UTCJun 5, 17:00 UTC1h 40m
2026-06-05 JRE823 - Jun 5, 00:05 UTCJun 5, 01:30 UTC1h 25m
2026-06-04 JRE823 - Jun 4, 20:15 UTCJun 4, 20:30 UTC15m
2026-06-04 JRE823 - Jun 4, 17:30 UTCJun 4, 19:25 UTC1h 55m
2026-06-04 JRE823 - Jun 4, 12:55 UTCJun 4, 15:25 UTC2h 30m
2026-06-03 JRE823 - Jun 3, 19:10 UTCJun 3, 22:35 UTC3h 25m
2026-06-03 JRE823 - Jun 3, 14:30 UTCJun 3, 16:05 UTC1h 35m
2026-06-03 JRE823 - Jun 3, 12:30 UTCJun 3, 13:45 UTC1h 15m
2026-06-02 JRE823 - Jun 2, 17:25 UTCJun 2, 20:45 UTC3h 20m
2026-06-02 JRE823 - Jun 2, 14:05 UTCJun 2, 15:20 UTC1h 15m
2026-06-01 JRE823 - Jun 1, 21:50 UTCJun 2, 00:50 UTC3h 0m
2026-06-01 JRE823 - Jun 1, 17:30 UTCJun 1, 18:45 UTC1h 15m
2026-06-01 JRE823 - Jun 1, 14:05 UTCJun 1, 16:30 UTC2h 25m
2026-05-31 JRE823 - May 31, 22:40 UTCMay 31, 23:25 UTC45m
2026-05-31 JRE823 - May 31, 19:10 UTCMay 31, 21:15 UTC2h 5m
2026-05-31 JRE823 - May 31, 15:50 UTCMay 31, 16:35 UTC45m
2026-05-30 JRE823 - May 30, 16:20 UTCMay 30, 19:20 UTC3h 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 N823JS page for operator, model, and routing details .

Mode-S AB3CD9 frequently asked

What is Mode-S code AB3CD9?
AB3CD9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N823JS.
Where is Mode-S AB3CD9 registered?
Mode-S code AB3CD9 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 AB3CD9 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3CD9, octal 52636331, decimal 11,222,233.
What flights does AB3CD9 operate?
Mode-S AB3CD9 has broadcast 1 distinct callsign, including JRE823.