Apparatus

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sensors Mode-S transponder

ACA1DA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N913AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
ACA1DA
Octal
53120732
Decimal
11,313,626
Country
US
Tail
N913AK
Type
B39M
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
417
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S ACA1DA.

Country allocation

The ICAO 24-bit address ACA1DA 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
ASA305 Alaska Airlines 9 2026-05-28
ASA435 Alaska Airlines 6 2026-04-20
ASA312 Alaska Airlines 6 2026-04-16
ASA266 Alaska Airlines 6 2026-06-11
ASA1416 Alaska Airlines 6 2026-07-21
ASA1411 - 6 2026-07-02
ASA763 Alaska Airlines 5 2026-07-22
ASA493 Alaska Airlines 5 2026-05-24
ASA434 Alaska Airlines 5 2026-04-19
ASA378 - 5 2026-07-09
ASA733 - 4 2026-06-30
ASA527 Alaska Airlines 4 2026-06-24
ASA514 - 4 2026-06-29
ASA507 Alaska Airlines 4 2026-04-15
ASA379 - 4 2026-07-10
ASA306 - 4 2026-04-13
ASA294 Alaska Airlines 4 2026-05-31
ASA253 Alaska Airlines 4 2026-07-21
ASA252 - 4 2026-07-20
ASA1332 Alaska Airlines 4 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1604 SFO → LAX Jul 26, 21:20 UTCJul 26, 22:15 UTC55m
2026-07-26 ASA227 SJC → SEA Jul 26, 14:20 UTCJul 26, 19:40 UTC5h 20m
2026-07-26 ASA22 SEA → JFK Jul 26, 06:40 UTCJul 26, 11:00 UTC4h 20m
2026-07-25 ASA787 LAS → SEA Jul 25, 22:10 UTCJul 26, 03:30 UTC5h 20m
2026-07-25 ASA787 LAS → SEA Jul 25, 22:21 UTCJul 26, 03:16 UTC4h 55m
2026-07-25 ASA787 LAS → SEA Jul 25, 16:05 UTCJul 25, 20:30 UTC4h 25m
2026-07-25 ASA1444 SFO → CUN Jul 25, 12:35 UTCJul 25, 14:15 UTC1h 40m
2026-07-25 ASA40 SFO → MCO Jul 25, 06:25 UTCJul 25, 10:45 UTC4h 20m
2026-07-25 ASA767 PDX → SFO Jul 25, 01:15 UTCJul 25, 04:20 UTC3h 5m
2026-07-24 ASA286 LAX → EWR Jul 24, 19:15 UTCJul 24, 23:05 UTC3h 50m
2026-07-24 ASA215 PDX → SJC Jul 24, 13:40 UTCJul 24, 17:30 UTC3h 50m
2026-07-24 ASA1370 PVR → SFO Jul 24, 01:20 UTCJul 24, 04:50 UTC3h 30m
2026-07-23 ASA267 SEA → AUS Jul 23, 21:05 UTCJul 24, 00:10 UTC3h 5m
2026-07-23 ASA53 EWR → PDX Jul 23, 14:45 UTCJul 23, 19:45 UTC5h 0m
2026-07-22 ASA1330 LAX → LIR Jul 22, 18:00 UTCJul 23, 06:00 UTC12h 0m
2026-07-22 ASA763 LAX → SFO Jul 22, 02:10 UTCJul 22, 02:55 UTC45m
2026-07-21 ASA763 LAX → SFO Jul 21, 22:20 UTCJul 21, 22:40 UTC20m
2026-07-21 ASA1416 SJC → GDL Jul 21, 15:35 UTCJul 21, 20:28 UTC4h 53m
2026-07-21 ASA1416 SJC → GDL Jul 21, 15:25 UTCJul 21, 15:55 UTC30m
2026-07-21 ASA678 SJC → SEA Jul 21, 05:10 UTCJul 21, 06:35 UTC1h 25m
2026-07-21 ASA253 SBA → SEA Jul 21, 02:15 UTCJul 21, 03:00 UTC45m
2026-07-20 ASA253 SBA → SEA Jul 20, 22:05 UTCJul 20, 22:25 UTC20m
2026-07-20 ASA253 SBA → SEA Jul 20, 22:02 UTCJul 21, 03:01 UTC4h 59m
2026-07-20 ASA252 - Jul 20, 20:30 UTCJul 20, 20:45 UTC15m
2026-07-20 ASA252 - Jul 20, 15:15 UTCJul 20, 16:05 UTC50m
2026-07-20 ASA1566 BOI → PDX Jul 20, 12:10 UTCJul 20, 13:05 UTC55m
2026-07-20 ASA463 SEA → BOI Jul 20, 05:34 UTCJul 20, 06:31 UTC57m
2026-07-20 ASA463 SEA → BOI Jul 20, 05:35 UTCJul 20, 06:35 UTC1h 0m
2026-07-19 ASA31 JFK → SEA Jul 19, 22:00 UTCJul 20, 04:00 UTC6h 0m
2026-07-19 ASA26 SEA → ORD Jul 19, 14:10 UTCJul 19, 18:40 UTC4h 30m
2026-07-19 ASA26 SEA → ORD Jul 19, 14:10 UTCJul 19, 18:27 UTC4h 17m
2026-07-18 ASA205 SAN → SEA Jul 18, 23:25 UTCJul 19, 04:45 UTC5h 20m
2026-07-18 ASA222 - Jul 18, 21:35 UTCJul 18, 21:45 UTC10m
2026-07-18 ASA222 - Jul 18, 16:25 UTCJul 18, 17:00 UTC35m
2026-07-18 ASA203 SEA → SJC Jul 18, 02:40 UTCJul 18, 03:25 UTC46m
2026-07-17 ASA245 - Jul 17, 15:20 UTCJul 17, 16:10 UTC50m
2026-07-17 ASA371 GEG → SEA Jul 17, 04:49 UTCJul 17, 05:35 UTC45m
2026-07-17 ASA1433 SEA → GEG Jul 17, 02:15 UTCJul 17, 02:54 UTC40m
2026-07-16 ASA582 - Jul 16, 22:30 UTCJul 17, 00:40 UTC2h 10m
2026-07-16 ASA692 - Jul 16, 18:44 UTCJul 16, 21:00 UTC2h 15m
2026-07-15 ASA356 - Jul 15, 23:20 UTCJul 16, 04:40 UTC5h 20m
2026-07-15 ASA239 SEA → EWR Jul 15, 14:35 UTCJul 15, 19:10 UTC4h 35m
2026-07-15 ASA683 SMF → SEA Jul 15, 01:05 UTCJul 15, 02:25 UTC1h 20m
2026-07-15 ASA683 SMF → SEA Jul 15, 01:04 UTCJul 15, 02:20 UTC1h 16m
2026-07-14 ASA681 SEA → SMF Jul 14, 22:00 UTCJul 14, 23:30 UTC1h 29m
2026-07-14 ASA620 SFO → SEA Jul 14, 13:35 UTCJul 14, 14:55 UTC1h 20m
2026-07-14 ASA590 SEA → SFO Jul 14, 04:50 UTCJul 14, 06:40 UTC1h 50m
2026-07-13 ASA337 ORD → SEA Jul 13, 23:00 UTCJul 14, 03:05 UTC4h 5m
2026-07-13 ASA429 - Jul 13, 17:50 UTCJul 13, 21:15 UTC3h 25m
2026-07-12 ASA259 - Jul 12, 12:10 UTCJul 12, 13:01 UTC50m

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 N913AK page for operator, model, and routing details .

Mode-S ACA1DA frequently asked

What is Mode-S code ACA1DA?
ACA1DA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N913AK.
Where is Mode-S ACA1DA registered?
Mode-S code ACA1DA 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 ACA1DA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA1DA, octal 53120732, decimal 11,313,626.
What flights does ACA1DA operate?
Mode-S ACA1DA has broadcast 20 distinct callsigns, including ASA305, ASA435, ASA312, ASA266, ASA1416.