Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACED21

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N932AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
ACED21
Octal
53166441
Decimal
11,332,897
Country
US
Tail
N932AK
Type
B39M
No current signal · last broadcast 4h ago
Flights observed
368
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S ACED21.

Country allocation

The ICAO 24-bit address ACED21 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
ASA507 Alaska Airlines 8 2026-05-20
ASA787 Alaska Airlines 6 2026-04-15
ASA62 Alaska Airlines 5 2026-06-24
ASA551 - 5 2026-06-23
ASA494 Alaska Airlines 4 2026-04-28
ASA404 Alaska Airlines 4 2026-05-27
ASA255 - 4 2026-07-10
ASA252 Alaska Airlines 4 2026-06-07
ASA1383 Alaska Airlines 4 2026-05-08
ASA741 Alaska Airlines 3 2026-04-26
ASA673 - 3 2026-04-13
ASA662 - 3 2026-06-26
ASA636 Alaska Airlines 3 2026-06-09
ASA521 - 3 2026-06-28
ASA513 - 3 2026-07-07
ASA481 - 3 2026-07-13
ASA459 - 3 2026-07-10
ASA389 - 3 2026-07-09
ASA358 - 3 2026-07-09
ASA335 - 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA458 - Jul 14, 05:35 UTCJul 14, 06:30 UTC55m
2026-07-14 ASA458 SEA → BZN Jul 14, 05:21 UTCJul 14, 06:43 UTC1h 22m
2026-07-13 ASA391 YYZ → SEA Jul 13, 21:30 UTCJul 14, 01:30 UTC4h 0m
2026-07-13 ASA391 - Jul 13, 21:10 UTCJul 14, 00:05 UTC2h 55m
2026-07-13 ASA385 SEA → YYZ Jul 13, 15:20 UTCJul 13, 19:15 UTC3h 55m
2026-07-13 ASA481 - Jul 13, 06:45 UTCJul 13, 06:50 UTC5m
2026-07-13 ASA481 SJC → SEA Jul 13, 05:10 UTCJul 13, 06:50 UTC1h 40m
2026-07-13 ASA481 SJC → SEA Jul 13, 05:07 UTCJul 13, 06:29 UTC1h 22m
2026-07-13 ASA319 SEA → SJC Jul 13, 02:05 UTCJul 13, 04:00 UTC1h 55m
2026-07-11 ASA305 - Jul 11, 22:35 UTCJul 12, 04:20 UTC5h 45m
2026-07-11 ASA305 SEA → MIA Jul 11, 15:30 UTCJul 11, 20:40 UTC5h 10m
2026-07-11 ASA339 AUS → SEA Jul 11, 01:15 UTCJul 11, 05:01 UTC3h 45m
2026-07-10 ASA604 SEA → AUS Jul 10, 19:45 UTCJul 10, 23:30 UTC3h 45m
2026-07-10 ASA459 BOS → SEA Jul 10, 11:30 UTCJul 10, 16:55 UTC5h 25m
2026-07-10 ASA255 - Jul 10, 04:15 UTCJul 10, 09:15 UTC5h 0m
2026-07-09 ASA389 BOS → SAN Jul 9, 21:05 UTCJul 10, 02:50 UTC5h 45m
2026-07-09 ASA358 PDX → BOS Jul 9, 14:40 UTCJul 9, 19:30 UTC4h 50m
2026-07-09 ASA650 - Jul 9, 04:05 UTCJul 9, 06:20 UTC2h 15m
2026-07-09 ASA650 PHX → PDX Jul 9, 04:03 UTCJul 9, 06:26 UTC2h 23m
2026-07-09 ASA744 SEA → PHX Jul 9, 00:35 UTCJul 9, 02:50 UTC2h 15m
2026-07-08 ASA762 - Jul 8, 22:10 UTCJul 8, 23:10 UTC1h 0m
2026-07-08 ASA762 - Jul 8, 17:40 UTCJul 8, 17:50 UTC10m
2026-07-08 ASA761 - Jul 8, 06:50 UTCJul 8, 07:05 UTC15m
2026-07-08 ASA761 - Jul 8, 01:45 UTCJul 8, 02:45 UTC1h 0m
2026-07-07 ASA513 - Jul 7, 22:55 UTCJul 7, 23:40 UTC45m
2026-07-07 ASA513 - Jul 7, 18:05 UTCJul 7, 18:30 UTC25m
2026-07-07 ASA200 SEA → KOA Jul 7, 02:13 UTCJul 7, 07:22 UTC5h 9m
2026-07-07 ASA200 SEA → KOA Jul 7, 02:15 UTCJul 7, 07:25 UTC5h 10m
2026-07-06 ASA363 ANC → SEA Jul 6, 20:30 UTCJul 6, 23:50 UTC3h 20m
2026-07-06 ASA79 SEA → ANC Jul 6, 15:15 UTCJul 6, 18:15 UTC3h 0m
2026-07-06 ASA259 - Jul 6, 12:30 UTCJul 6, 13:25 UTC55m
2026-07-06 ASA259 - Jul 6, 07:50 UTCJul 6, 08:10 UTC20m
2026-07-05 ASA238 SEA → KOA Jul 5, 23:27 UTCJul 6, 04:35 UTC5h 8m
2026-07-05 ASA238 SEA → KOA Jul 5, 23:15 UTCJul 6, 04:35 UTC5h 20m
2026-07-05 ASA1477 - Jul 5, 17:30 UTCJul 5, 19:45 UTC2h 15m
2026-07-05 ASA1361 - Jul 5, 13:30 UTCJul 5, 15:55 UTC2h 25m
2026-07-04 ASA786 - Jul 4, 11:25 UTCJul 4, 16:30 UTC5h 5m
2026-07-04 ASA781 SEA → BWI Jul 4, 04:50 UTCJul 4, 09:30 UTC4h 40m
2026-07-03 ASA572 RDU → SEA Jul 3, 22:05 UTCJul 4, 03:15 UTC5h 10m
2026-07-03 ASA572 SEA → RDU Jul 3, 16:05 UTCJul 3, 20:45 UTC4h 40m
2026-07-03 ASA499 PDX → SEA Jul 3, 13:45 UTCJul 3, 14:15 UTC30m
2026-07-03 ASA1457 SEA → PDX Jul 3, 06:05 UTCJul 3, 06:35 UTC30m
2026-07-03 ASA1457 SEA → PDX Jul 3, 06:10 UTCJul 3, 06:31 UTC21m
2026-07-02 ASA304 SEA → LAX Jul 2, 22:55 UTCJul 3, 04:30 UTC5h 35m
2026-07-02 ASA306 SEA → BNH Jul 2, 16:15 UTCJul 2, 21:10 UTC4h 55m
2026-07-02 ASA387 MSP → SEA Jul 2, 11:25 UTCJul 2, 14:35 UTC3h 10m
2026-07-01 ASA527 SNA → SEA Jul 1, 21:20 UTCJul 2, 00:15 UTC2h 55m
2026-07-01 ASA720 BUR → SEA Jul 1, 17:30 UTCJul 1, 19:45 UTC2h 15m
2026-07-01 ASA488 SEA → BUR Jul 1, 14:00 UTCJul 1, 16:00 UTC2h 0m
2026-07-01 ASA329 - Jul 1, 01:45 UTCJul 1, 05:25 UTC3h 40m

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 N932AK page for operator, model, and routing details .

Mode-S ACED21 frequently asked

What is Mode-S code ACED21?
ACED21 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N932AK.
Where is Mode-S ACED21 registered?
Mode-S code ACED21 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 ACED21 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACED21, octal 53166441, decimal 11,332,897.
What flights does ACED21 operate?
Mode-S ACED21 has broadcast 20 distinct callsigns, including ASA507, ASA787, ASA62, ASA551, ASA494.