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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 2h ago
Flights observed
351
Distinct callsigns
20
Country
US
Last broadcast
2h ago

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
ASA759 Alaska Airlines 4 2026-06-14
ASA697 - 4 2026-06-22
ASA66 Alaska Airlines 4 2026-06-21
ASA232 Alaska Airlines 4 2026-05-27
ASA1424 Alaska Airlines 4 2026-06-10
ASA1306 Alaska Airlines 4 2026-05-10
ASA9 Alaska Airlines 3 2026-05-04
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
ASA548 Alaska Airlines 3 2026-06-14
ASA485 Alaska Airlines 3 2026-05-29
ASA451 Alaska Airlines 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-16 ASA67 - Jul 16, 23:40 UTCJul 17, 00:55 UTC1h 15m
2026-07-16 ASA630 - Jul 16, 20:35 UTCJul 16, 22:10 UTC1h 35m
2026-07-16 ASA1607 LAX → SFO Jul 16, 17:35 UTCJul 16, 18:34 UTC1h 0m
2026-07-16 ASA1607 LAX → SFO Jul 16, 17:30 UTCJul 16, 18:25 UTC55m
2026-07-15 ASA1419 - Jul 15, 18:25 UTCJul 16, 01:05 UTC6h 40m
2026-07-15 ASA278 - Jul 15, 01:15 UTCJul 15, 03:20 UTC2h 5m
2026-07-14 ASA712 - Jul 14, 21:20 UTCJul 14, 23:10 UTC1h 49m
2026-07-14 ASA588 - Jul 14, 17:55 UTCJul 14, 20:10 UTC2h 15m
2026-07-14 ASA588 PDX → SNA Jul 14, 17:58 UTCJul 14, 20:06 UTC2h 8m
2026-07-14 ASA750 - Jul 14, 14:15 UTCJul 14, 16:05 UTC1h 50m
2026-07-14 ASA631 - Jul 14, 03:15 UTCJul 14, 05:50 UTC2h 35m
2026-07-14 ASA1340 OAK → SEA Jul 14, 00:15 UTCJul 14, 01:45 UTC1h 30m
2026-07-13 ASA1522 - Jul 13, 20:40 UTCJul 13, 21:35 UTC55m
2026-07-13 ASA5 - Jul 13, 14:10 UTCJul 13, 18:40 UTC4h 30m
2026-07-12 ASA6 - Jul 12, 19:05 UTCJul 12, 23:45 UTC4h 40m
2026-07-12 ASA1329 - Jul 12, 15:45 UTCJul 12, 16:40 UTC55m
2026-07-12 ASA1625 - Jul 12, 13:20 UTCJul 12, 14:10 UTC50m
2026-07-11 ASA9450 - Jul 11, 15:05 UTCJul 11, 17:35 UTC2h 30m
2026-07-11 ASA9450 OKC → LAX Jul 11, 15:18 UTCJul 11, 17:24 UTC2h 6m
2026-07-10 ASA9440 - Jul 10, 16:15 UTCJul 10, 17:30 UTC1h 15m
2026-06-26 ASA9420 SEA → OKC Jun 26, 15:10 UTCJun 26, 18:20 UTC3h 10m
2026-06-26 ASA423 SEA → SAT Jun 26, 12:24 UTCJun 26, 13:24 UTC1h 0m
2026-06-26 ASA463 - Jun 26, 04:45 UTCJun 26, 05:39 UTC55m
2026-06-25 ASA407 ORD → SEA Jun 25, 21:15 UTCJun 26, 01:24 UTC4h 10m
2026-06-25 ASA265 SEA → ORD Jun 25, 15:59 UTCJun 25, 19:29 UTC3h 30m
2026-06-25 ASA400 SBA → SEA Jun 25, 02:54 UTCJun 25, 05:00 UTC2h 5m
2026-06-24 ASA400 SEA → SBA Jun 24, 23:59 UTCJun 25, 01:59 UTC2h 0m
2026-06-24 ASA580 BUR → SEA Jun 24, 20:30 UTCJun 24, 22:45 UTC2h 15m
2026-06-24 ASA580 BUR → SEA Jun 24, 20:27 UTCJun 24, 22:28 UTC2h 1m
2026-06-24 ASA426 SEA → BUR Jun 24, 17:05 UTCJun 24, 19:10 UTC2h 5m
2026-06-23 ASA537 BUR → SEA Jun 23, 22:29 UTCJun 24, 00:34 UTC2h 5m
2026-06-23 ASA1585 SEA → BUR Jun 23, 02:09 UTCJun 23, 04:19 UTC2h 10m
2026-06-22 ASA697 - Jun 22, 23:20 UTCJun 23, 00:19 UTC1h 0m
2026-06-22 ASA697 - Jun 22, 20:49 UTCJun 22, 21:35 UTC45m
2026-06-22 ASA1468 SMF → SEA Jun 22, 17:34 UTCJun 22, 19:00 UTC1h 25m
2026-06-22 ASA682 SEA → SMF Jun 22, 14:40 UTCJun 22, 16:05 UTC1h 25m
2026-06-22 ASA583 ORD → SEA Jun 22, 00:44 UTCJun 22, 04:30 UTC3h 46m
2026-06-22 ASA583 ORD → SEA Jun 22, 00:44 UTCJun 22, 04:49 UTC4h 5m
2026-06-21 ASA346 SFO → FLL Jun 21, 19:34 UTCJun 21, 23:00 UTC3h 25m

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 2h ago.
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.