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sensors Mode-S transponder

A300A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N293AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A300A9
Octal
50600251
Decimal
10,682,537
Country
US
Tail
N293AK
Type
B739
Broadcasting now · callsign ASA1524 · 19,900 ft
Flights observed
429
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A300A9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A300A9 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
ASA331 Alaska Airlines 6 2026-05-14
ASA684 - 5 2026-07-03
ASA458 - 5 2026-07-10
ASA324 Alaska Airlines 5 2026-06-08
ASA67 - 4 2026-07-02
ASA629 - 4 2026-07-07
ASA587 Alaska Airlines 4 2026-07-06
ASA344 Alaska Airlines 4 2026-06-23
ASA150 Alaska Airlines 4 2026-04-13
ASA1456 Alaska Airlines 4 2026-07-07
ASA141 Alaska Airlines 4 2026-04-17
ASA778 - 3 2026-07-03
ASA777 - 3 2026-07-07
ASA771 - 3 2026-06-18
ASA740 Alaska Airlines 3 2026-05-26
ASA624 Alaska Airlines 3 2026-05-23
ASA57 Alaska Airlines 3 2026-04-18
ASA563 Alaska Airlines 3 2026-04-14
ASA532 - 3 2026-04-16
ASA527 Alaska Airlines 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA783 ATL → PDX Jul 14, 00:45 UTCJul 14, 05:10 UTC4h 25m
2026-07-13 ASA334 SEA → ATL Jul 13, 16:20 UTCJul 13, 20:55 UTC4h 35m
2026-07-13 ASA557 - Jul 13, 11:10 UTCJul 13, 14:05 UTC2h 55m
2026-07-13 ASA556 - Jul 13, 02:05 UTCJul 13, 04:50 UTC2h 45m
2026-07-12 ASA507 - Jul 12, 20:10 UTCJul 12, 23:50 UTC3h 40m
2026-07-12 ASA507 - Jul 12, 15:20 UTCJul 12, 18:35 UTC3h 15m
2026-07-12 ASA749 LAS → SEA Jul 12, 04:30 UTCJul 12, 06:25 UTC1h 55m
2026-07-12 ASA531 - Jul 12, 01:10 UTCJul 12, 03:05 UTC1h 55m
2026-07-11 ASA267 - Jul 11, 20:25 UTCJul 11, 23:50 UTC3h 25m
2026-07-11 ASA1541 MSP → ANC Jul 11, 12:50 UTCJul 11, 18:00 UTC5h 10m
2026-07-11 ASA1540 ANC → MSP Jul 11, 06:01 UTCJul 11, 11:05 UTC5h 5m
2026-07-11 ASA767 BFI → ANC Jul 11, 01:50 UTCJul 11, 04:50 UTC3h 0m
2026-07-10 ASA363 ANC → SEA Jul 10, 20:25 UTCJul 10, 23:35 UTC3h 10m
2026-07-10 ASA79 SEA → ANC Jul 10, 15:25 UTCJul 10, 18:25 UTC3h 0m
2026-07-10 ASA458 SEA → SEA Jul 10, 04:55 UTCJul 10, 13:35 UTC8h 40m
2026-07-10 ASA758 - Jul 10, 01:50 UTCJul 10, 03:20 UTC1h 30m
2026-07-10 ASA758 SFO → SEA Jul 10, 01:51 UTCJul 10, 03:12 UTC1h 21m
2026-07-09 ASA236 PDX → SFO Jul 9, 22:55 UTCJul 10, 00:25 UTC1h 30m
2026-07-09 ASA576 - Jul 9, 18:35 UTCJul 9, 20:40 UTC2h 5m
2026-07-09 ASA576 SAN → PDX Jul 9, 18:35 UTCJul 9, 20:42 UTC2h 7m
2026-07-09 ASA577 PDX → SAN Jul 9, 14:45 UTCJul 9, 16:50 UTC2h 5m
2026-07-09 ASA1397 CUN → SAN Jul 9, 03:05 UTCJul 9, 04:55 UTC1h 50m
2026-07-08 ASA1441 SEA → BOS Jul 8, 17:00 UTCJul 9, 01:00 UTC8h 0m
2026-07-08 ASA1620 - Jul 8, 13:10 UTCJul 8, 14:05 UTC55m
2026-07-08 ASA590 SFO → ORD Jul 8, 04:20 UTCJul 8, 06:00 UTC1h 40m
2026-07-08 ASA1413 SJC → SEA Jul 8, 00:46 UTCJul 8, 02:22 UTC1h 36m
2026-07-08 ASA1413 - Jul 8, 00:50 UTCJul 8, 02:15 UTC1h 25m
2026-07-07 ASA1366 SEA → SJC Jul 7, 21:40 UTCJul 7, 23:25 UTC1h 45m
2026-07-07 ASA629 LAS → SEA Jul 7, 17:35 UTCJul 7, 19:40 UTC2h 5m
2026-07-07 ASA777 - Jul 7, 14:10 UTCJul 7, 16:15 UTC2h 5m
2026-07-07 ASA366 LAS → PAE Jul 7, 03:45 UTCJul 7, 05:55 UTC2h 10m
2026-07-07 ASA1456 SJC → PDX Jul 7, 00:46 UTCJul 7, 02:30 UTC1h 44m
2026-07-07 ASA1456 SJC → PDX Jul 7, 00:35 UTCJul 7, 02:40 UTC2h 5m
2026-07-06 ASA286 SEA → SEA Jul 6, 18:55 UTCJul 6, 23:05 UTC4h 10m
2026-07-06 ASA587 ORD → SEA Jul 6, 13:25 UTCJul 6, 17:20 UTC3h 55m
2026-07-06 ASA587 ORD → SEA Jul 6, 13:20 UTCJul 6, 17:08 UTC3h 48m
2026-07-06 ASA1724 - Jul 6, 05:40 UTCJul 6, 11:20 UTC5h 40m
2026-07-06 ASA225 SEA → ANC Jul 6, 00:50 UTCJul 6, 03:50 UTC3h 0m
2026-07-05 ASA446 PHL → SEA Jul 5, 21:10 UTCJul 5, 23:05 UTC1h 55m
2026-07-05 ASA208 SEA → SFO Jul 5, 17:40 UTCJul 5, 19:50 UTC2h 10m
2026-07-05 ASA409 IAD → SEA Jul 5, 10:10 UTCJul 5, 15:15 UTC5h 5m
2026-07-04 ASA506 - Jul 4, 18:05 UTCJul 4, 22:30 UTC4h 25m
2026-07-04 ASA1557 SFO → SAN Jul 4, 15:05 UTCJul 4, 16:10 UTC1h 5m
2026-07-04 ASA634 LAS → SFO Jul 4, 01:15 UTCJul 4, 02:25 UTC1h 10m
2026-07-03 ASA778 PDX → LAS Jul 3, 22:00 UTCJul 3, 23:40 UTC1h 40m
2026-07-03 ASA684 DEN → PDX Jul 3, 18:28 UTCJul 3, 20:26 UTC1h 58m
2026-07-03 ASA684 DEN → PDX Jul 3, 18:05 UTCJul 3, 20:20 UTC2h 15m
2026-07-03 ASA401 PDX → DEN Jul 3, 14:35 UTCJul 3, 16:40 UTC2h 5m
2026-07-02 ASA1519 - Jul 2, 23:00 UTCJul 3, 02:10 UTC3h 10m
2026-07-02 ASA1525 MCO → SEA Jul 2, 18:45 UTCJul 2, 21:40 UTC2h 55m

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 N293AK page for operator, model, and routing details .

Mode-S A300A9 frequently asked

What is Mode-S code A300A9?
A300A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N293AK.
Where is Mode-S A300A9 registered?
Mode-S code A300A9 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 A300A9 broadcasting right now?
Yes. Mode-S A300A9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A300A9, octal 50600251, decimal 10,682,537.
What flights does A300A9 operate?
Mode-S A300A9 has broadcast 20 distinct callsigns, including ASA331, ASA684, ASA458, ASA324, ASA67.