Apparatus

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sensors Mode-S transponder

A9D63B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N733AL · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
A9D63B
Octal
52353073
Decimal
11,130,427
Country
US
Tail
N733AL
Type
B39M
No current signal · last broadcast 1h ago
Flights observed
387
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A9D63B.

Country allocation

The ICAO 24-bit address A9D63B 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
ASA252 Alaska Airlines 6 2026-06-03
ASA714 Alaska Airlines 5 2026-05-08
ASA19 Alaska Airlines 5 2026-05-29
ASA762 - 4 2026-07-12
ASA739 Alaska Airlines 4 2026-06-04
ASA670 Alaska Airlines 4 2026-06-27
ASA652 - 4 2026-06-14
ASA62 Alaska Airlines 4 2026-07-01
ASA501 - 4 2026-07-14
ASA325 Alaska Airlines 4 2026-04-25
ASA305 Alaska Airlines 4 2026-06-16
ASA270 - 4 2026-06-24
ASA267 Alaska Airlines 4 2026-04-30
ASA26 - 4 2026-06-26
ASA193 Alaska Airlines 4 2026-04-17
ASA83 - 3 2026-07-07
ASA763 Alaska Airlines 3 2026-06-02
ASA761 - 3 2026-07-12
ASA707 - 3 2026-06-30
ASA626 Alaska Airlines 3 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA501 - Jul 14, 01:05 UTCJul 14, 04:20 UTC3h 15m
2026-07-13 ASA497 - Jul 13, 20:45 UTCJul 13, 23:45 UTC3h 0m
2026-07-13 ASA623 BNA → SEA Jul 13, 14:35 UTCJul 13, 18:45 UTC4h 10m
2026-07-13 ASA623 BNA → SEA Jul 13, 14:35 UTCJul 13, 18:35 UTC4h 0m
2026-07-13 ASA416 SEA → BNA Jul 13, 01:01 UTCJul 13, 04:50 UTC3h 50m
2026-07-12 ASA762 - Jul 12, 21:30 UTCJul 12, 22:25 UTC55m
2026-07-12 ASA762 - Jul 12, 17:10 UTCJul 12, 17:25 UTC15m
2026-07-12 ASA761 SEA → HNL Jul 12, 01:45 UTCJul 12, 07:20 UTC5h 35m
2026-07-11 ASA513 KOA → SEA Jul 11, 18:05 UTCJul 11, 23:40 UTC5h 35m
2026-07-11 ASA200 SEA → KOA Jul 11, 02:10 UTCJul 11, 07:45 UTC5h 35m
2026-07-10 ASA618 STL → SEA Jul 10, 19:55 UTCJul 10, 23:35 UTC3h 40m
2026-07-10 ASA618 SEA → STL Jul 10, 15:15 UTCJul 10, 18:35 UTC3h 20m
2026-07-10 ASA550 DFW → SEA Jul 10, 02:05 UTCJul 10, 05:40 UTC3h 35m
2026-07-10 ASA550 DFW → SEA Jul 10, 02:04 UTCJul 10, 05:28 UTC3h 24m
2026-07-09 ASA380 SEA → MSP Jul 9, 21:50 UTCJul 10, 00:20 UTC2h 30m
2026-07-09 ASA380 SEA → MSP Jul 9, 21:48 UTCJul 10, 00:12 UTC2h 24m
2026-07-09 ASA1394 PDX → SAN Jul 9, 18:10 UTCJul 9, 20:15 UTC2h 5m
2026-07-09 ASA1626 DEN → PDX Jul 9, 14:15 UTCJul 9, 16:40 UTC2h 25m
2026-07-09 ASA1626 DEN → PDX Jul 9, 14:14 UTCJul 9, 16:29 UTC2h 15m
2026-07-09 ASA752 ANC → DEN Jul 9, 07:35 UTCJul 9, 12:10 UTC4h 35m
2026-07-09 ASA271 PDX → ANC Jul 9, 01:05 UTCJul 9, 04:25 UTC3h 20m
2026-07-08 ASA1633 SJC → PDX Jul 8, 21:40 UTCJul 8, 23:00 UTC1h 20m
2026-07-08 ASA1632 PDX → SJC Jul 8, 19:05 UTCJul 8, 20:17 UTC1h 12m
2026-07-08 ASA1632 PDX → SJC Jul 8, 18:55 UTCJul 8, 20:15 UTC1h 20m
2026-07-08 ASA413 ORD → PDX Jul 8, 13:25 UTCJul 8, 17:05 UTC3h 40m
2026-07-08 ASA1724 ANC → ORD Jul 8, 05:35 UTCJul 8, 11:30 UTC5h 55m
2026-07-08 ASA87 SCC → ANC Jul 8, 02:10 UTCJul 8, 03:40 UTC1h 30m
2026-07-07 ASA86 - Jul 7, 23:35 UTCJul 8, 03:35 UTC4h 0m
2026-07-07 ASA83 SEA → ANC Jul 7, 19:25 UTCJul 7, 22:25 UTC3h 0m
2026-07-07 ASA1426 LAX → ZIH Jul 7, 17:35 UTCJul 7, 17:40 UTC5m
2026-07-07 ASA1426 LAX → ZIH Jul 7, 16:05 UTCJul 7, 17:17 UTC1h 12m
2026-07-07 ASA1426 LAX → ZIH Jul 7, 15:50 UTCJul 7, 17:40 UTC1h 50m
2026-07-07 ASA539 SEA → SJC Jul 7, 01:00 UTCJul 7, 02:40 UTC1h 40m
2026-07-06 ASA521 SJC → SEA Jul 6, 21:36 UTCJul 6, 22:50 UTC1h 14m
2026-07-06 ASA521 - Jul 6, 21:25 UTCJul 6, 22:45 UTC1h 20m
2026-07-06 ASA335 SEA → SJC Jul 6, 18:36 UTCJul 6, 20:07 UTC1h 31m
2026-07-06 ASA335 SEA → SJC Jul 6, 18:25 UTCJul 6, 20:15 UTC1h 50m
2026-07-06 ASA244 - Jul 6, 06:20 UTCJul 6, 07:25 UTC1h 5m
2026-07-05 ASA254 - Jul 5, 18:30 UTCJul 5, 19:20 UTC50m
2026-07-05 ASA708 MCO → SAN Jul 5, 11:50 UTCJul 5, 16:15 UTC4h 25m
2026-07-04 ASA420 SEA → MCO Jul 4, 17:10 UTCJul 4, 22:20 UTC5h 10m
2026-07-04 ASA453 - Jul 4, 11:10 UTCJul 4, 15:25 UTC4h 15m
2026-07-04 ASA1579 SEA → IAH Jul 4, 01:10 UTCJul 4, 05:00 UTC3h 50m
2026-07-03 ASA521 SJC → SEA Jul 3, 21:35 UTCJul 3, 23:30 UTC1h 55m
2026-07-03 ASA335 SEA → SJC Jul 3, 18:30 UTCJul 3, 20:05 UTC1h 35m
2026-07-03 ASA479 LAS → SEA Jul 3, 14:30 UTCJul 3, 16:45 UTC2h 15m
2026-07-03 ASA531 PDX → LAS Jul 3, 01:05 UTCJul 3, 02:55 UTC1h 50m
2026-07-02 ASA1383 - Jul 2, 21:35 UTCJul 2, 22:45 UTC1h 10m
2026-07-02 ASA1383 BUR → PDX Jul 2, 21:35 UTCJul 2, 23:30 UTC1h 55m
2026-07-02 ASA1384 PDX → BUR Jul 2, 18:10 UTCJul 2, 20:00 UTC1h 50m

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 N733AL page for operator, model, and routing details .

Mode-S A9D63B frequently asked

What is Mode-S code A9D63B?
A9D63B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N733AL.
Where is Mode-S A9D63B registered?
Mode-S code A9D63B 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 A9D63B broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D63B, octal 52353073, decimal 11,130,427.
What flights does A9D63B operate?
Mode-S A9D63B has broadcast 20 distinct callsigns, including ASA252, ASA714, ASA19, ASA762, ASA739.