Apparatus

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sensors Mode-S transponder

A4BCBA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N404NS · CESSNA 402 Businessliner · operated by J + D AVIATION SERVICES LLC

Hex
A4BCBA
Octal
51136272
Decimal
10,796,218
Country
US
Tail
N404NS
Type
C402
No current signal · last broadcast 10h ago
Flights observed
115
Distinct callsigns
1
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A4BCBA.

Country allocation

The ICAO 24-bit address A4BCBA 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
N404NS - 115 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N404NS - Jul 13, 20:20 UTCJul 13, 21:10 UTC50m
2026-07-13 N404NS - Jul 13, 19:15 UTCJul 13, 19:45 UTC30m
2026-07-13 N404NS - Jul 13, 10:10 UTCJul 13, 11:10 UTC1h 0m
2026-07-12 N404NS - Jul 12, 23:10 UTCJul 13, 00:10 UTC1h 0m
2026-07-12 N404NS - Jul 12, 21:55 UTCJul 12, 22:30 UTC35m
2026-07-12 N404NS - Jul 12, 16:55 UTCJul 12, 17:15 UTC20m
2026-07-12 N404NS - Jul 12, 15:25 UTCJul 12, 16:01 UTC35m
2026-07-12 N404NS - Jul 12, 14:20 UTCJul 12, 14:30 UTC10m
2026-07-12 N404NS - Jul 12, 01:45 UTCJul 12, 02:05 UTC20m
2026-07-03 N404NS - Jul 3, 19:10 UTCJul 3, 20:30 UTC1h 20m
2026-07-02 N404NS - Jul 2, 23:50 UTCJul 3, 00:35 UTC45m
2026-07-02 N404NS - Jul 2, 20:35 UTCJul 2, 22:05 UTC1h 30m
2026-07-02 N404NS - Jul 2, 04:25 UTCJul 2, 05:15 UTC50m
2026-07-02 N404NS - Jul 2, 03:30 UTCJul 2, 04:00 UTC30m
2026-07-01 N404NS - Jul 1, 21:15 UTCJul 1, 21:30 UTC15m
2026-07-01 N404NS - Jul 1, 10:35 UTCJul 1, 10:45 UTC10m
2026-06-30 N404NS - Jun 30, 20:30 UTCJun 30, 20:40 UTC10m
2026-06-30 N404NS - Jun 30, 19:45 UTCJun 30, 19:55 UTC10m
2026-06-29 N404NS - Jun 29, 10:40 UTCJun 29, 11:39 UTC1h 0m
2026-06-28 N404NS - Jun 28, 02:44 UTCJun 28, 02:54 UTC10m
2026-06-26 N404NS - Jun 26, 20:59 UTCJun 26, 21:10 UTC10m
2026-06-26 N404NS - Jun 26, 11:09 UTCJun 26, 11:24 UTC15m
2026-06-25 N404NS - Jun 25, 21:15 UTCJun 25, 21:25 UTC10m
2026-06-22 N404NS - Jun 22, 21:00 UTCJun 22, 21:10 UTC10m
2026-06-22 N404NS - Jun 22, 17:29 UTCJun 22, 17:44 UTC15m
2026-06-19 N404NS - Jun 19, 21:09 UTCJun 19, 21:24 UTC15m
2026-06-19 N404NS - Jun 19, 19:45 UTCJun 19, 19:54 UTC10m
2026-06-19 N404NS - Jun 19, 12:04 UTCJun 19, 12:14 UTC10m
2026-06-18 N404NS - Jun 18, 21:05 UTCJun 18, 21:25 UTC20m
2026-06-18 N404NS - Jun 18, 18:30 UTCJun 18, 19:15 UTC45m
2026-06-18 N404NS - Jun 18, 16:10 UTCJun 18, 17:21 UTC1h 11m
2026-06-18 N404NS - Jun 18, 11:50 UTCJun 18, 12:00 UTC10m
2026-06-18 N404NS - Jun 18, 10:40 UTCJun 18, 11:15 UTC35m
2026-06-17 N404NS - Jun 17, 21:15 UTCJun 17, 21:25 UTC10m
2026-06-17 N404NS - Jun 17, 19:25 UTCJun 17, 19:35 UTC10m
2026-06-17 N404NS - Jun 17, 18:15 UTCJun 17, 18:25 UTC10m
2026-06-17 N404NS - Jun 17, 16:15 UTCJun 17, 17:40 UTC1h 25m
2026-06-17 N404NS - Jun 17, 10:40 UTCJun 17, 10:50 UTC10m
2026-06-16 N404NS - Jun 16, 21:40 UTCJun 16, 21:50 UTC10m
2026-06-16 N404NS - Jun 16, 20:20 UTCJun 16, 21:05 UTC45m
2026-06-16 N404NS - Jun 16, 19:35 UTCJun 16, 19:45 UTC10m
2026-06-16 N404NS - Jun 16, 18:15 UTCJun 16, 18:50 UTC35m
2026-06-16 N404NS - Jun 16, 12:20 UTCJun 16, 12:30 UTC10m
2026-06-15 N404NS - Jun 15, 20:30 UTCJun 15, 20:40 UTC10m
2026-06-15 N404NS - Jun 15, 19:39 UTCJun 15, 19:50 UTC10m
2026-06-15 N404NS - Jun 15, 18:45 UTCJun 15, 18:55 UTC10m
2026-06-15 N404NS - Jun 15, 13:25 UTCJun 15, 13:34 UTC10m
2026-06-15 N404NS - Jun 15, 12:35 UTCJun 15, 12:49 UTC15m
2026-06-15 N404NS - Jun 15, 10:55 UTCJun 15, 11:54 UTC1h 0m
2026-06-15 N404NS - Jun 15, 04:15 UTCJun 15, 05:15 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 N404NS page for operator, model, and routing details .

Mode-S A4BCBA frequently asked

What is Mode-S code A4BCBA?
A4BCBA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N404NS.
Where is Mode-S A4BCBA registered?
Mode-S code A4BCBA 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 A4BCBA broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4BCBA, octal 51136272, decimal 10,796,218.
What flights does A4BCBA operate?
Mode-S A4BCBA has broadcast 1 distinct callsign, including N404NS.