Apparatus

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sensors Mode-S transponder

A9AEBC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N723AL · operated by ALASKA AIRLINES INC

Hex
A9AEBC
Octal
52327274
Decimal
11,120,316
Country
US
Tail
N723AL
Type
B39M
Broadcasting now · callsign ASA523 · 37,000 ft
Flights observed
322
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

A9AEBC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A9AEBC 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
ASA379 - 5 2026-07-06
ASA365 Alaska Airlines 5 2026-04-29
ASA67 - 4 2026-07-11
ASA508 Alaska Airlines 4 2026-05-20
ASA378 - 4 2026-07-06
ASA266 Alaska Airlines 4 2026-06-02
ASA227 Alaska Airlines 4 2026-04-16
ASA1430 Alaska Airlines 4 2026-04-21
ASA1345 Alaska Airlines 4 2026-05-24
ASA1320 - 4 2026-07-05
ASA81 Alaska Airlines 3 2026-04-22
ASA727 - 3 2026-07-12
ASA626 Alaska Airlines 3 2026-05-14
ASA558 Alaska Airlines 3 2026-05-22
ASA479 Alaska Airlines 3 2026-05-20
ASA444 Alaska Airlines 3 2026-04-21
ASA383 Alaska Airlines 3 2026-05-10
ASA377 - 3 2026-07-13
ASA352 Alaska Airlines 3 2026-05-07
ASA16 Alaska Airlines 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASA450 - Jul 13, 22:30 UTCJul 14, 02:50 UTC4h 20m
2026-07-13 ASA450 SEA → CMH Jul 13, 17:05 UTCJul 13, 21:00 UTC3h 55m
2026-07-13 ASA377 ATL → SEA Jul 13, 11:05 UTCJul 13, 15:30 UTC4h 25m
2026-07-12 ASA727 SEA → ATL Jul 12, 23:25 UTCJul 13, 03:40 UTC4h 15m
2026-07-12 ASA676 LAS → SEA Jul 12, 19:40 UTCJul 12, 21:35 UTC1h 55m
2026-07-12 ASA1628 PDX → LAS Jul 12, 16:10 UTCJul 12, 18:05 UTC1h 55m
2026-07-11 ASA1519 - Jul 11, 23:00 UTCJul 12, 02:15 UTC3h 15m
2026-07-11 ASA1525 - Jul 11, 18:40 UTCJul 11, 21:35 UTC2h 55m
2026-07-11 ASA349 LAS → PDX Jul 11, 15:05 UTCJul 11, 16:55 UTC1h 50m
2026-07-11 ASA1636 ANC → LAS Jul 11, 08:35 UTCJul 11, 13:20 UTC4h 45m
2026-07-11 ASA67 - Jul 11, 05:25 UTCJul 11, 06:45 UTC1h 20m
2026-07-11 ASA67 - Jul 11, 03:40 UTCJul 11, 03:50 UTC10m
2026-07-11 ASA67 - Jul 11, 01:50 UTCJul 11, 02:10 UTC20m
2026-07-10 ASA67 - Jul 10, 22:50 UTCJul 11, 00:15 UTC1h 25m
2026-07-10 ASA48 ANC → SEA Jul 10, 18:05 UTCJul 10, 21:10 UTC3h 6m
2026-07-10 ASA85 SEA → ANC Jul 10, 13:10 UTCJul 10, 16:15 UTC3h 5m
2026-07-10 ASA594 ONT → SEA Jul 10, 04:40 UTCJul 10, 06:40 UTC2h 0m
2026-07-10 ASA594 ONT → SEA Jul 10, 04:36 UTCJul 10, 06:35 UTC1h 59m
2026-07-10 ASA592 SEA → ONT Jul 10, 01:25 UTCJul 10, 03:35 UTC2h 10m
2026-07-09 ASA381 DEN → SEA Jul 9, 20:20 UTCJul 9, 22:55 UTC2h 35m
2026-07-09 ASA375 - Jul 9, 16:50 UTCJul 9, 19:00 UTC2h 10m
2026-07-09 ASA715 ORD → SEA Jul 9, 11:25 UTCJul 9, 15:15 UTC3h 50m
2026-07-09 ASA538 SEA → ORD Jul 9, 01:20 UTCJul 9, 05:15 UTC3h 55m
2026-07-08 ASA446 PHL → SEA Jul 8, 20:50 UTCJul 8, 22:35 UTC1h 45m
2026-07-08 ASA208 - Jul 8, 17:25 UTCJul 8, 19:35 UTC2h 10m
2026-07-07 ASA517 - Jul 7, 23:20 UTCJul 8, 05:00 UTC5h 40m
2026-07-07 ASA516 SEA → FLL Jul 7, 16:00 UTCJul 7, 21:25 UTC5h 25m
2026-07-06 ASA379 BWI → SEA Jul 6, 23:40 UTCJul 7, 04:45 UTC5h 5m
2026-07-06 ASA378 SEA → BWI Jul 6, 16:40 UTCJul 6, 21:15 UTC4h 35m
2026-07-06 ASA409 IAD → SEA Jul 6, 10:15 UTCJul 6, 15:10 UTC4h 55m
2026-07-05 ASA406 SEA → IAD Jul 5, 23:15 UTCJul 6, 03:45 UTC4h 30m
2026-07-05 ASA381 - Jul 5, 19:10 UTCJul 5, 21:35 UTC2h 25m
2026-07-05 ASA375 - Jul 5, 15:30 UTCJul 5, 17:35 UTC2h 5m
2026-07-05 ASA221 ANC → SEA Jul 5, 08:35 UTCJul 5, 11:30 UTC2h 55m
2026-07-05 ASA1320 DEN → ANC Jul 5, 01:45 UTCJul 5, 06:50 UTC5h 5m
2026-07-04 ASA1320 - Jul 4, 19:20 UTCJul 5, 00:00 UTC4h 40m
2026-07-04 ASA79 SEA → ANC Jul 4, 14:40 UTCJul 4, 17:55 UTC3h 15m
2026-07-03 ASA734 SLC → SEA Jul 3, 22:20 UTCJul 4, 00:05 UTC1h 45m
2026-07-03 ASA733 SEA → SLC Jul 3, 19:30 UTCJul 3, 21:00 UTC1h 30m
2026-07-03 ASA1426 LAX → ZIH Jul 3, 15:45 UTCJul 3, 17:45 UTC2h 0m
2026-07-03 ASA1310 SEA → SJC Jul 3, 03:50 UTCJul 3, 05:30 UTC1h 40m
2026-07-02 ASA313 SEA → DTW Jul 2, 21:55 UTCJul 3, 02:20 UTC4h 25m
2026-07-02 ASA313 SEA → DTW Jul 2, 16:40 UTCJul 2, 20:25 UTC3h 45m
2026-07-02 ASA1529 SEA → RDU Jul 2, 12:15 UTCJul 2, 14:55 UTC2h 40m
2026-07-02 ASA1526 SEA → MSY Jul 2, 03:10 UTCJul 2, 05:35 UTC2h 25m
2026-07-02 ASA1526 SEA → MSY Jul 2, 03:07 UTCJul 2, 05:30 UTC2h 23m
2026-07-01 ASA535 DEN → SEA Jul 1, 23:10 UTCJul 2, 01:30 UTC2h 20m
2026-07-01 ASA535 SEA → DEN Jul 1, 19:10 UTCJul 1, 21:25 UTC2h 15m
2026-07-01 ASA645 PHX → SEA Jul 1, 14:40 UTCJul 1, 17:15 UTC2h 35m
2026-07-01 ASA644 SEA → PHX Jul 1, 04:10 UTCJul 1, 06:35 UTC2h 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 N723AL page for operator, model, and routing details .

Mode-S A9AEBC frequently asked

What is Mode-S code A9AEBC?
A9AEBC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N723AL.
Where is Mode-S A9AEBC registered?
Mode-S code A9AEBC 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 A9AEBC broadcasting right now?
Yes. Mode-S A9AEBC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9AEBC, octal 52327274, decimal 11,120,316.
What flights does A9AEBC operate?
Mode-S A9AEBC has broadcast 20 distinct callsigns, including ASA379, ASA365, ASA67, ASA508, ASA378.