Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3C8CB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N343DN · AIRBUS A-321 · operated by BANK OF UTAH TRUSTEE

Hex
A3C8CB
Octal
50744313
Decimal
10,733,771
Country
US
Tail
N343DN
Type
A321
No current signal · last broadcast 1d ago
Flights observed
4
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A3C8CB.

Country allocation

The ICAO 24-bit address A3C8CB 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 2 distinct

Callsign Airline Flights Last seen
DAL9888 - 2 2026-04-13
DAL2266 - 2 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 DAL2266 BUF → ATL Apr 13, 21:14 UTCApr 13, 22:52 UTC1h 38m
2026-04-13 DAL2266 ATL → BUF Apr 13, 18:10 UTCApr 13, 19:45 UTC1h 35m
2026-04-13 DAL9888 - Apr 13, 15:50 UTCApr 13, 16:10 UTC20m
2026-04-13 DAL9888 - Apr 13, 14:20 UTCApr 13, 16:04 UTC1h 44m

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 N343DN page for operator, model, and routing details .

Mode-S A3C8CB frequently asked

What is Mode-S code A3C8CB?
A3C8CB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N343DN.
Where is Mode-S A3C8CB registered?
Mode-S code A3C8CB 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 A3C8CB 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 A3C8CB, octal 50744313, decimal 10,733,771.
What flights does A3C8CB operate?
Mode-S A3C8CB has broadcast 2 distinct callsigns, including DAL9888, DAL2266.