sensors Mode-S transponder

A30BCE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N296AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A30BCE
Octal
50605716
Decimal
10,685,390
Country
US
Tail
N296AK
Type
B739
No current signal · last broadcast 20h ago
Flights observed
10
Distinct callsigns
7
Country
US
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S A30BCE.

Country allocation

The ICAO 24-bit address A30BCE 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 7 distinct

Callsign Airline Flights Last seen
ASA18 - 3 2026-04-13
ASA53 - 2 2026-04-14
ASA681 Alaska Airlines 1 2026-04-12
ASA571 - 1 2026-04-14
ASA531 - 1 2026-04-13
ASA452 - 1 2026-04-13
ASA114 - 1 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 ASA53 - Apr 14, 09:10 UTCApr 14, 10:40 UTC1h 30m
2026-04-14 ASA53 - Apr 14, 07:50 UTCApr 14, 09:05 UTC1h 15m
2026-04-14 ASA571 - Apr 14, 05:15 UTCApr 14, 06:20 UTC1h 5m
2026-04-13 ASA114 - Apr 13, 21:05 UTCApr 13, 23:40 UTC2h 35m
2026-04-13 ASA18 - Apr 13, 16:15 UTCApr 13, 19:00 UTC2h 45m
2026-04-13 ASA18 - Apr 13, 16:10 UTCApr 13, 19:00 UTC2h 50m
2026-04-13 ASA18 - Apr 13, 14:05 UTCApr 13, 16:15 UTC2h 10m
2026-04-13 ASA452 - Apr 13, 04:20 UTCApr 13, 06:05 UTC1h 45m
2026-04-13 ASA531 PDX → LAS Apr 13, 01:09 UTCApr 13, 02:53 UTC1h 44m
2026-04-12 ASA681 DEN → SEA Apr 12, 19:45 UTCApr 12, 21:09 UTC1h 24m

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 N296AK page for operator, model, and routing details .

Mode-S A30BCE frequently asked

What is Mode-S code A30BCE?
A30BCE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N296AK.
Where is Mode-S A30BCE registered?
Mode-S code A30BCE 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 A30BCE broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A30BCE, octal 50605716, decimal 10,685,390.
What flights does A30BCE operate?
Mode-S A30BCE has broadcast 7 distinct callsigns, including ASA18, ASA53, ASA681, ASA571, ASA531.