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 Jul 26, 21:30 UTC
Flights observed
441
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

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
ASA670 Alaska Airlines 5 2026-07-26
ASA50 Alaska Airlines 5 2026-07-21
ASA19 Alaska Airlines 5 2026-05-29
ASA762 - 4 2026-07-12
ASA739 Alaska Airlines 4 2026-06-04
ASA652 - 4 2026-06-14
ASA62 Alaska Airlines 4 2026-07-01
ASA618 - 4 2026-07-14
ASA501 - 4 2026-07-14
ASA49 Alaska Airlines 4 2026-07-21
ASA47 Alaska Airlines 4 2026-07-21
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA209 LAX → SFO Jul 26, 19:40 UTCJul 26, 21:30 UTC1h 50m
2026-07-26 ASA670 PDX → LAS Jul 26, 12:30 UTCJul 26, 17:45 UTC5h 15m
2026-07-26 ASA677 LAS → SEA Jul 26, 04:50 UTCJul 26, 09:10 UTC4h 21m
2026-07-25 ASA510 PDX → BNA Jul 25, 21:55 UTCJul 26, 01:15 UTC3h 20m
2026-07-25 ASA1429 SJD → SFO Jul 25, 17:50 UTCJul 25, 20:30 UTC2h 40m
2026-07-25 ASA541 AUS → PDX Jul 25, 12:55 UTCJul 25, 16:20 UTC3h 25m
2026-07-25 ASA372 SEA → DFW Jul 25, 01:55 UTCJul 25, 05:30 UTC3h 35m
2026-07-24 ASA402 CHS → SEA Jul 24, 21:10 UTCJul 25, 00:05 UTC2h 55m
2026-07-24 ASA53 EWR → PDX Jul 24, 15:00 UTCJul 24, 19:50 UTC4h 50m
2026-07-24 ASA1351 SJC → SEA Jul 24, 07:15 UTCJul 24, 12:45 UTC5h 30m
2026-07-24 ASA1352 SFO → BOS Jul 24, 04:55 UTCJul 24, 05:25 UTC30m
2026-07-23 ASA1352 SFO → BOS Jul 23, 23:55 UTCJul 24, 04:35 UTC4h 40m
2026-07-23 ASA502 SEA → AUS Jul 23, 20:05 UTCJul 23, 22:20 UTC2h 15m
2026-07-23 ASA1327 SFO → SEA Jul 23, 16:20 UTCJul 23, 17:55 UTC1h 35m
2026-07-23 ASA1601 LAX → SFO Jul 23, 04:15 UTCJul 23, 05:20 UTC1h 5m
2026-07-23 ASA1601 LAX → SFO Jul 23, 04:27 UTCJul 23, 05:04 UTC37m
2026-07-22 ASA56 LAX → PDX Jul 22, 19:30 UTCJul 23, 00:20 UTC4h 50m
2026-07-22 ASA1615 PDX → ANC Jul 22, 14:31 UTCJul 22, 17:57 UTC3h 26m
2026-07-22 ASA1615 PDX → ANC Jul 22, 14:35 UTCJul 22, 18:05 UTC3h 30m
2026-07-22 ASA1609 ANC → PDX Jul 22, 02:15 UTCJul 22, 05:25 UTC3h 10m
2026-07-21 ASA657 JFK → SFO Jul 21, 21:48 UTCJul 22, 00:54 UTC3h 6m
2026-07-21 ASA657 JFK → SFO Jul 21, 21:50 UTCJul 22, 00:55 UTC3h 5m
2026-07-21 ASA47 ORD → ANC Jul 21, 15:00 UTCJul 21, 18:10 UTC3h 10m
2026-07-21 ASA50 BRW → ANC Jul 21, 07:45 UTCJul 21, 07:55 UTC10m
2026-07-21 ASA50 BRW → ANC Jul 21, 07:53 UTCJul 21, 13:16 UTC5h 23m
2026-07-21 ASA49 SNA → PDX Jul 21, 06:10 UTCJul 21, 06:20 UTC10m
2026-07-21 ASA49 SNA → PDX Jul 21, 00:40 UTCJul 21, 01:35 UTC55m
2026-07-20 ASA1825 PDX → ONT Jul 20, 15:20 UTCJul 20, 21:35 UTC6h 15m
2026-07-20 ASA1543 ANC → ORD Jul 20, 07:30 UTCJul 20, 13:15 UTC5h 45m
2026-07-20 ASA46 - Jul 20, 04:50 UTCJul 20, 05:45 UTC55m
2026-07-20 ASA45 ANC → BET Jul 20, 02:40 UTCJul 20, 03:25 UTC45m
2026-07-19 ASA1565 PDX → ANC Jul 19, 21:40 UTCJul 20, 00:55 UTC3h 15m
2026-07-19 ASA1699 - Jul 19, 18:00 UTCJul 19, 19:45 UTC1h 45m
2026-07-19 ASA1449 SFO → SEA Jul 19, 14:50 UTCJul 19, 16:50 UTC2h 0m
2026-07-18 ASA646 PDX → PHX Jul 18, 23:25 UTCJul 19, 02:45 UTC3h 20m
2026-07-18 ASA392 PDX → DFW Jul 18, 18:10 UTCJul 18, 21:30 UTC3h 20m
2026-07-18 ASA392 PDX → DFW Jul 18, 18:06 UTCJul 18, 21:21 UTC3h 15m
2026-07-18 ASA511 BNA → PDX Jul 18, 14:23 UTCJul 18, 16:27 UTC2h 4m
2026-07-18 ASA1550 ANC → PHX Jul 18, 07:10 UTCJul 18, 12:15 UTC5h 5m
2026-07-18 ASA46 - Jul 18, 04:40 UTCJul 18, 05:30 UTC50m
2026-07-18 ASA46 BET → ANC Jul 18, 04:32 UTCJul 18, 05:27 UTC55m
2026-07-18 ASA45 - Jul 18, 02:29 UTCJul 18, 03:20 UTC51m
2026-07-17 ASA1565 PDX → ANC Jul 17, 21:34 UTCJul 18, 00:45 UTC3h 10m
2026-07-17 ASA1699 ONT → PDX Jul 17, 18:05 UTCJul 17, 19:49 UTC1h 45m
2026-07-17 ASA1449 PDX → ONT Jul 17, 14:50 UTCJul 17, 16:55 UTC2h 5m
2026-07-17 ASA1449 PDX → ONT Jul 17, 14:56 UTCJul 17, 16:53 UTC1h 57m
2026-07-17 ASA1392 - Jul 17, 01:15 UTCJul 17, 03:05 UTC1h 50m
2026-07-16 ASA1447 ORD → SAN Jul 16, 19:50 UTCJul 16, 23:25 UTC3h 35m
2026-07-16 ASA1446 - Jul 16, 14:25 UTCJul 16, 18:10 UTC3h 45m
2026-07-15 ASA1348 SEA → SAN Jul 15, 23:55 UTCJul 16, 02:30 UTC2h 35m

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 Jul 26, 21:30 UTC.
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, ASA670, ASA50, ASA19.