Apparatus

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sensors Mode-S transponder

AD6B0C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N964AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
AD6B0C
Octal
53265414
Decimal
11,365,132
Country
US
Tail
N964AK
Type
B39M
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 AD6B0C.

Country allocation

The ICAO 24-bit address AD6B0C 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
ASA640 - 3 2026-04-13
ASA326 - 1 2026-04-12

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 ASA640 - Apr 13, 16:15 UTCApr 13, 18:30 UTC2h 15m
2026-04-13 ASA640 - Apr 13, 15:50 UTCApr 13, 18:30 UTC2h 40m
2026-04-13 ASA640 - Apr 13, 13:05 UTCApr 13, 16:15 UTC3h 10m
2026-04-12 ASA326 - Apr 12, 17:15 UTCApr 12, 20:15 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 N964AK page for operator, model, and routing details .

Mode-S AD6B0C frequently asked

What is Mode-S code AD6B0C?
AD6B0C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N964AK.
Where is Mode-S AD6B0C registered?
Mode-S code AD6B0C 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 AD6B0C 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 AD6B0C, octal 53265414, decimal 11,365,132.
What flights does AD6B0C operate?
Mode-S AD6B0C has broadcast 2 distinct callsigns, including ASA640, ASA326.