Apparatus

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sensors Mode-S transponder

A6BBA3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N533AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A6BBA3
Octal
51535643
Decimal
10,927,011
Country
US
Tail
N533AS
Type
B738
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
390
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S A6BBA3.

Country allocation

The ICAO 24-bit address A6BBA3 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 20 distinct

Callsign Airline Flights Last seen
ASA67 - 10 2026-07-17
ASA580 - 7 2026-06-24
ASA686 - 5 2026-06-14
ASA65 - 5 2026-06-19
ASA9821 Alaska Airlines 4 2026-04-17
ASA9 Alaska Airlines 4 2026-07-19
ASA760 Alaska Airlines 4 2026-07-23
ASA759 Alaska Airlines 4 2026-06-14
ASA697 - 4 2026-06-22
ASA66 Alaska Airlines 4 2026-06-21
ASA407 Alaska Airlines 4 2026-07-26
ASA232 Alaska Airlines 4 2026-05-27
ASA1424 Alaska Airlines 4 2026-06-10
ASA1357 Alaska Airlines 4 2026-07-23
ASA1306 Alaska Airlines 4 2026-05-10
ASA728 Alaska Airlines 3 2026-05-02
ASA687 Alaska Airlines 3 2026-05-23
ASA658 Alaska Airlines 3 2026-06-06
ASA612 Alaska Airlines 3 2026-05-25
ASA6 - 3 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA407 ORD → SEA Jul 26, 21:00 UTCJul 26, 22:40 UTC1h 40m
2026-07-26 ASA265 PDX → SFO Jul 26, 16:10 UTCJul 26, 19:25 UTC3h 15m
2026-07-26 ASA594 PDX → SFO Jul 26, 05:00 UTCJul 26, 07:00 UTC2h 1m
2026-07-26 ASA592 CUN → SFO Jul 26, 01:40 UTCJul 26, 03:55 UTC2h 15m
2026-07-25 ASA286 LAX → EWR Jul 25, 22:04 UTCJul 25, 23:26 UTC1h 22m
2026-07-25 ASA286 LAX → EWR Jul 25, 19:30 UTCJul 25, 23:30 UTC4h 0m
2026-07-25 ASA281 EWR → SEA Jul 25, 12:25 UTCJul 25, 16:55 UTC4h 30m
2026-07-25 ASA281 EWR → SEA Jul 25, 12:24 UTCJul 25, 16:41 UTC4h 17m
2026-07-25 ASA382 SEA → BNA Jul 25, 06:40 UTCJul 25, 10:20 UTC3h 40m
2026-07-25 ASA322 LAX → EWR Jul 25, 00:15 UTCJul 25, 04:10 UTC3h 55m
2026-07-24 ASA341 LAX → SFO Jul 24, 19:30 UTCJul 24, 22:50 UTC3h 20m
2026-07-24 ASA479 JFK → SFO Jul 24, 14:55 UTCJul 24, 17:00 UTC2h 5m
2026-07-24 ASA478 SEA → LAS Jul 24, 02:25 UTCJul 24, 04:30 UTC2h 5m
2026-07-24 ASA478 SEA → LAS Jul 24, 02:24 UTCJul 24, 04:22 UTC1h 58m
2026-07-23 ASA760 SNA → SEA Jul 23, 22:30 UTCJul 24, 00:35 UTC2h 5m
2026-07-23 ASA1357 PVR → SFO Jul 23, 18:40 UTCJul 23, 21:10 UTC2h 30m
2026-07-23 ASA479 JFK → SFO Jul 23, 15:00 UTCJul 23, 17:10 UTC2h 10m
2026-07-23 ASA478 SEA → LAS Jul 23, 02:00 UTCJul 23, 04:10 UTC2h 10m
2026-07-22 ASA760 SNA → SEA Jul 22, 21:50 UTCJul 23, 00:00 UTC2h 10m
2026-07-22 ASA1357 PVR → SFO Jul 22, 18:15 UTCJul 22, 20:35 UTC2h 20m
2026-07-22 ASA444 SEA → PHL Jul 22, 14:35 UTCJul 22, 16:30 UTC1h 55m
2026-07-22 ASA1408 SJC → GDL Jul 22, 02:40 UTCJul 22, 04:55 UTC2h 15m
2026-07-21 ASA407 ORD → SEA Jul 21, 21:05 UTCJul 22, 01:00 UTC3h 55m
2026-07-21 ASA407 ORD → SEA Jul 21, 21:00 UTCJul 22, 00:49 UTC3h 49m
2026-07-21 ASA265 PDX → SFO Jul 21, 16:10 UTCJul 21, 19:30 UTC3h 20m
2026-07-21 ASA1509 SEA → BUR Jul 21, 08:25 UTCJul 21, 11:50 UTC3h 25m
2026-07-21 ASA284 LAX → EWR Jul 21, 01:55 UTCJul 21, 05:00 UTC3h 5m
2026-07-20 ASA601 SEA → SFO Jul 20, 23:05 UTCJul 21, 00:20 UTC1h 14m
2026-07-20 ASA601 SEA → SFO Jul 20, 22:59 UTCJul 21, 00:14 UTC1h 15m
2026-07-20 ASA273 PDX → SFO Jul 20, 19:55 UTCJul 20, 21:10 UTC1h 15m
2026-07-20 ASA427 SEA → CVG Jul 20, 16:50 UTCJul 20, 17:15 UTC25m
2026-07-19 ASA9 DCA → PDX Jul 19, 21:30 UTCJul 20, 02:40 UTC5h 10m
2026-07-19 ASA4 SEA → DCA Jul 19, 15:30 UTCJul 19, 19:45 UTC4h 15m
2026-07-19 ASA98 ADQ → ANC Jul 19, 10:30 UTCJul 19, 13:30 UTC3h 0m
2026-07-19 ASA39 JFK → SFO Jul 19, 03:17 UTCJul 19, 07:24 UTC4h 7m
2026-07-19 ASA39 JFK → SFO Jul 19, 03:05 UTCJul 19, 07:35 UTC4h 30m
2026-07-19 ASA373 SEA → SLC Jul 19, 00:15 UTCJul 19, 01:50 UTC1h 35m
2026-07-18 ASA286 SEA → SEA Jul 18, 18:50 UTCJul 18, 22:55 UTC4h 5m
2026-07-18 ASA427 PDX → SEA Jul 18, 16:50 UTCJul 18, 17:30 UTC40m
2026-07-18 ASA1519 ANC → FAI Jul 18, 00:45 UTCJul 18, 04:00 UTC3h 16m
2026-07-17 ASA1525 MCO → SEA Jul 17, 20:44 UTCJul 17, 23:31 UTC2h 47m
2026-07-17 ASA1525 MCO → SEA Jul 17, 20:29 UTCJul 17, 23:30 UTC3h 0m
2026-07-17 ASA349 LAS → PDX Jul 17, 17:35 UTCJul 17, 19:19 UTC1h 44m
2026-07-17 ASA349 LAS → PDX Jul 17, 17:35 UTCJul 17, 19:20 UTC1h 45m
2026-07-17 ASA1636 ANC → LAS Jul 17, 08:04 UTCJul 17, 12:55 UTC4h 50m
2026-07-17 ASA1636 ANC → LAS Jul 17, 08:05 UTCJul 17, 12:49 UTC4h 44m
2026-07-17 ASA67 JNU → ANC Jul 17, 05:28 UTCJul 17, 06:29 UTC1h 1m
2026-07-17 ASA67 - Jul 17, 05:04 UTCJul 17, 06:35 UTC1h 30m
2026-07-17 ASA67 - Jul 17, 03:30 UTCJul 17, 03:50 UTC20m
2026-07-17 ASA67 - Jul 17, 02:05 UTCJul 17, 02:25 UTC20m

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 N533AS page for operator, model, and routing details .

Mode-S A6BBA3 frequently asked

What is Mode-S code A6BBA3?
A6BBA3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N533AS.
Where is Mode-S A6BBA3 registered?
Mode-S code A6BBA3 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 A6BBA3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6BBA3, octal 51535643, decimal 10,927,011.
What flights does A6BBA3 operate?
Mode-S A6BBA3 has broadcast 20 distinct callsigns, including ASA67, ASA580, ASA686, ASA65, ASA9821.