Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9D284

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N732AL · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
A9D284
Octal
52351204
Decimal
11,129,476
Country
US
Tail
N732AL
Type
B39M
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
459
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A9D284.

Country allocation

The ICAO 24-bit address A9D284 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
ASA326 Alaska Airlines 8 2026-04-18
ASA409 - 6 2026-06-26
ASA787 Alaska Airlines 5 2026-06-01
ASA416 - 5 2026-07-17
ASA1350 Alaska Airlines 5 2026-05-06
ASA785 Alaska Airlines 4 2026-05-12
ASA768 - 4 2026-07-10
ASA763 - 4 2026-07-12
ASA753 - 4 2026-06-18
ASA565 Alaska Airlines 4 2026-05-17
ASA517 - 4 2026-07-13
ASA505 - 4 2026-07-18
ASA500 - 4 2026-06-20
ASA483 - 4 2026-06-18
ASA357 Alaska Airlines 4 2026-04-16
ASA266 - 4 2026-07-06
ASA252 - 4 2026-07-22
ASA221 Alaska Airlines 4 2026-05-01
ASA1631 - 4 2026-04-15
ASA1380 Alaska Airlines 4 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA301 LIH → SJC Jul 26, 22:05 UTCJul 26, 23:00 UTC55m
2026-07-26 ASA295 LAX → SEA Jul 26, 15:10 UTCJul 26, 20:07 UTC4h 57m
2026-07-26 ASA295 LAX → SEA Jul 26, 15:15 UTCJul 26, 20:25 UTC5h 10m
2026-07-25 ASA205 SAN → SEA Jul 25, 23:25 UTCJul 26, 04:40 UTC5h 15m
2026-07-25 ASA222 SAN → AUS Jul 25, 21:30 UTCJul 25, 21:35 UTC5m
2026-07-25 ASA222 SAN → AUS Jul 25, 16:35 UTCJul 25, 17:10 UTC35m
2026-07-25 ASA222 SAN → AUS Jul 25, 16:30 UTCJul 25, 21:37 UTC5h 7m
2026-07-25 ASA1412 SJD → SEA Jul 25, 11:55 UTCJul 25, 13:05 UTC1h 10m
2026-07-25 ASA1412 SJD → SEA Jul 25, 08:10 UTCJul 25, 08:30 UTC20m
2026-07-24 ASA94 ANC → SEA Jul 24, 23:25 UTCJul 25, 04:55 UTC5h 30m
2026-07-24 ASA35 JFK → SAN Jul 24, 16:40 UTCJul 24, 21:40 UTC5h 0m
2026-07-23 ASA16 SEA → JFK Jul 23, 21:45 UTCJul 24, 02:15 UTC4h 30m
2026-07-23 ASA275 LAX → SEA Jul 23, 16:50 UTCJul 23, 20:00 UTC3h 10m
2026-07-23 ASA1521 SAN → ORD Jul 23, 05:25 UTCJul 23, 09:00 UTC3h 35m
2026-07-23 ASA1521 SAN → ORD Jul 23, 05:24 UTCJul 23, 08:58 UTC3h 34m
2026-07-22 ASA253 SBA → SEA Jul 22, 22:20 UTCJul 23, 03:20 UTC5h 0m
2026-07-22 ASA252 - Jul 22, 20:45 UTCJul 22, 21:00 UTC15m
2026-07-22 ASA252 - Jul 22, 15:30 UTCJul 22, 16:20 UTC50m
2026-07-22 ASA1490 OGG → PDX Jul 22, 01:45 UTCJul 22, 02:40 UTC55m
2026-07-21 ASA1490 OGG → PDX Jul 21, 21:48 UTCJul 22, 02:37 UTC4h 49m
2026-07-21 ASA739 SEA → SJC Jul 21, 20:10 UTCJul 21, 20:25 UTC15m
2026-07-21 ASA739 SEA → SJC Jul 21, 14:50 UTCJul 21, 15:40 UTC50m
2026-07-21 ASA1319 SFO → PDX Jul 21, 00:35 UTCJul 21, 04:30 UTC3h 55m
2026-07-20 ASA1319 SFO → PDX Jul 20, 22:40 UTCJul 21, 00:30 UTC1h 50m
2026-07-20 ASA390 SAN → BOS Jul 20, 15:30 UTCJul 20, 20:40 UTC5h 10m
2026-07-20 ASA390 SAN → BOS Jul 20, 15:27 UTCJul 20, 20:28 UTC5h 1m
2026-07-20 ASA201 ANC → BET Jul 20, 08:40 UTCJul 20, 13:05 UTC4h 25m
2026-07-19 ASA406 SEA → IAD Jul 19, 23:25 UTCJul 20, 03:35 UTC4h 10m
2026-07-19 ASA1476 STL → PVR Jul 19, 20:20 UTCJul 19, 21:40 UTC1h 20m
2026-07-19 ASA1380 PDX → CUN Jul 19, 17:35 UTCJul 19, 19:05 UTC1h 30m
2026-07-19 ASA1365 PVR → SFO Jul 19, 13:15 UTCJul 19, 15:15 UTC2h 0m
2026-07-18 ASA1419 - Jul 18, 17:50 UTCJul 19, 00:55 UTC7h 5m
2026-07-18 ASA505 - Jul 18, 13:20 UTCJul 18, 15:45 UTC2h 25m
2026-07-18 ASA329 ORD → SEA Jul 18, 02:52 UTCJul 18, 06:33 UTC3h 41m
2026-07-18 ASA329 ORD → SEA Jul 18, 03:00 UTCJul 18, 06:45 UTC3h 45m
2026-07-17 ASA410 SEA → ORD Jul 17, 21:05 UTCJul 18, 01:20 UTC4h 15m
2026-07-17 ASA623 BNA → SEA Jul 17, 14:39 UTCJul 17, 18:44 UTC4h 5m
2026-07-17 ASA416 SEA → BNA Jul 17, 03:50 UTCJul 17, 07:44 UTC3h 55m
2026-07-16 ASA356 EWR → SEA Jul 16, 20:45 UTCJul 17, 02:05 UTC5h 20m
2026-07-16 ASA239 SEA → EWR Jul 16, 14:15 UTCJul 16, 18:40 UTC4h 25m
2026-07-15 ASA1681 LAS → SEA Jul 15, 02:50 UTCJul 15, 04:40 UTC1h 50m
2026-07-15 ASA1681 LAS → SEA Jul 15, 02:46 UTCJul 15, 04:29 UTC1h 43m
2026-07-14 ASA600 SEA → LAS Jul 14, 23:10 UTCJul 15, 01:20 UTC2h 10m
2026-07-14 ASA1476 SMF → SEA Jul 14, 20:25 UTCJul 14, 21:40 UTC1h 15m
2026-07-14 ASA1380 SEA → SMF Jul 14, 17:40 UTCJul 14, 19:10 UTC1h 30m
2026-07-14 ASA519 - Jul 14, 12:25 UTCJul 14, 16:00 UTC3h 35m
2026-07-14 ASA520 SEA → SAT Jul 14, 06:20 UTCJul 14, 10:05 UTC3h 45m
2026-07-13 ASA517 - Jul 13, 23:00 UTCJul 14, 04:45 UTC5h 45m
2026-07-13 ASA516 SEA → FLL Jul 13, 15:40 UTCJul 13, 21:00 UTC5h 20m
2026-07-13 ASA279 GEG → SEA Jul 13, 13:30 UTCJul 13, 14:15 UTC45m

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 N732AL page for operator, model, and routing details .

Mode-S A9D284 frequently asked

What is Mode-S code A9D284?
A9D284 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N732AL.
Where is Mode-S A9D284 registered?
Mode-S code A9D284 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 A9D284 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D284, octal 52351204, decimal 11,129,476.
What flights does A9D284 operate?
Mode-S A9D284 has broadcast 20 distinct callsigns, including ASA326, ASA409, ASA787, ASA416, ASA1350.