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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
Broadcasting now · callsign ASA528 · 35,000 ft
Flights observed
421
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

Current position

ACED21 is currently broadcasting. Map zoomed to live position.

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 - 10 2026-07-14
ASA787 Alaska Airlines 6 2026-04-15
ASA762 - 5 2026-07-15
ASA62 Alaska Airlines 5 2026-06-24
ASA551 - 5 2026-06-23
ASA676 Alaska Airlines 4 2026-07-26
ASA494 Alaska Airlines 4 2026-04-28
ASA412 Alaska Airlines 4 2026-07-23
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
ASA9805 Alaska Airlines 3 2026-07-19
ASA761 - 3 2026-07-15
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA676 SEA → LAS Jul 26, 19:35 UTCJul 26, 21:40 UTC2h 5m
2026-07-26 ASA1628 PDX → LAS Jul 26, 16:05 UTCJul 26, 18:05 UTC2h 0m
2026-07-25 ASA301 LIH → SJC Jul 25, 21:45 UTCJul 26, 02:55 UTC5h 10m
2026-07-25 ASA295 LAX → SEA Jul 25, 15:00 UTCJul 25, 20:00 UTC5h 0m
2026-07-25 ASA259 SJD → SJC Jul 25, 07:20 UTCJul 25, 12:35 UTC5h 15m
2026-07-24 ASA238 SFO → LAS Jul 24, 23:45 UTCJul 25, 05:20 UTC5h 35m
2026-07-24 ASA1476 STL → PVR Jul 24, 20:15 UTCJul 24, 21:40 UTC1h 25m
2026-07-24 ASA1380 PDX → CUN Jul 24, 17:35 UTCJul 24, 19:00 UTC1h 25m
2026-07-24 ASA344 LAX → IAD Jul 24, 11:20 UTCJul 24, 15:40 UTC4h 20m
2026-07-24 ASA343 EWR → LAX Jul 24, 05:35 UTCJul 24, 09:05 UTC3h 30m
2026-07-23 ASA412 SEA → PIT Jul 23, 22:25 UTCJul 24, 03:10 UTC4h 45m
2026-07-23 ASA412 SEA → PIT Jul 23, 17:10 UTCJul 23, 21:00 UTC3h 50m
2026-07-23 ASA409 IAD → SEA Jul 23, 10:15 UTCJul 23, 15:25 UTC5h 10m
2026-07-22 ASA406 IAD → SEA Jul 22, 23:30 UTCJul 23, 03:35 UTC4h 5m
2026-07-22 ASA676 SEA → LAS Jul 22, 19:30 UTCJul 22, 21:25 UTC1h 55m
2026-07-22 ASA1628 PDX → LAS Jul 22, 16:05 UTCJul 22, 18:00 UTC1h 55m
2026-07-21 ASA1434 SJC → SJD Jul 21, 23:50 UTCJul 22, 03:00 UTC3h 10m
2026-07-21 ASA509 SEA → SJC Jul 21, 19:30 UTCJul 21, 22:20 UTC2h 50m
2026-07-21 ASA451 IAD → SFO Jul 21, 13:22 UTCJul 21, 17:20 UTC3h 58m
2026-07-21 ASA451 IAD → SFO Jul 21, 13:15 UTCJul 21, 17:35 UTC4h 20m
2026-07-21 ASA490 SEA → MSY Jul 21, 06:40 UTCJul 21, 10:50 UTC4h 10m
2026-07-21 ASA665 PDX → ANC Jul 21, 02:56 UTCJul 21, 04:28 UTC1h 32m
2026-07-21 ASA665 PDX → ANC Jul 21, 02:55 UTCJul 21, 04:45 UTC1h 50m
2026-07-20 ASA368 SEA → SLC Jul 20, 22:55 UTCJul 21, 00:35 UTC1h 39m
2026-07-20 ASA705 OAK → SEA Jul 20, 17:55 UTCJul 20, 19:20 UTC1h 25m
2026-07-20 ASA533 SEA → OAK Jul 20, 14:40 UTCJul 20, 16:30 UTC1h 50m
2026-07-20 ASA533 SEA → OAK Jul 20, 14:39 UTCJul 20, 16:22 UTC1h 43m
2026-07-19 ASA356 EWR → SEA Jul 19, 22:10 UTCJul 20, 03:45 UTC5h 35m
2026-07-19 ASA9805 LAX → SFO Jul 19, 18:55 UTCJul 19, 19:15 UTC20m
2026-07-19 ASA9805 LAX → SFO Jul 19, 18:25 UTCJul 19, 19:15 UTC50m
2026-07-19 ASA9805 LAX → SFO Jul 19, 18:23 UTCJul 19, 18:37 UTC14m
2026-07-18 ASA297 - Jul 18, 19:15 UTCJul 19, 01:05 UTC5h 50m
2026-07-18 ASA1412 - Jul 18, 12:35 UTCJul 18, 13:15 UTC40m
2026-07-18 ASA1412 - Jul 18, 08:20 UTCJul 18, 08:40 UTC20m
2026-07-17 ASA94 ANC → SEA Jul 17, 23:30 UTCJul 18, 05:00 UTC5h 31m
2026-07-17 ASA1346 SEA → SAN Jul 17, 19:15 UTCJul 17, 21:44 UTC2h 30m
2026-07-17 ASA1533 - Jul 17, 15:20 UTCJul 17, 17:25 UTC2h 5m
2026-07-17 ASA1559 - Jul 17, 03:25 UTCJul 17, 05:15 UTC1h 50m
2026-07-17 ASA1506 - Jul 17, 01:45 UTCJul 17, 01:49 UTC5m
2026-07-16 ASA1506 BOS → SEA Jul 16, 20:06 UTCJul 17, 01:26 UTC5h 20m
2026-07-16 ASA1506 BOS → SEA Jul 16, 20:00 UTCJul 17, 01:49 UTC5h 50m
2026-07-16 ASA1505 SEA → BOS Jul 16, 13:20 UTCJul 16, 18:00 UTC4h 40m
2026-07-16 ASA1505 SEA → BOS Jul 16, 13:19 UTCJul 16, 17:50 UTC4h 31m
2026-07-16 ASA599 - Jul 16, 03:10 UTCJul 16, 04:25 UTC1h 15m
2026-07-16 ASA599 RNO → SEA Jul 16, 03:14 UTCJul 16, 04:24 UTC1h 10m
2026-07-16 ASA598 - Jul 16, 00:20 UTCJul 16, 01:30 UTC1h 10m
2026-07-15 ASA762 - Jul 15, 17:20 UTCJul 15, 17:30 UTC10m
2026-07-15 ASA762 HNL → SEA Jul 15, 17:19 UTCJul 15, 22:31 UTC5h 12m
2026-07-15 ASA762 HNL → SEA Jul 15, 17:28 UTCJul 15, 22:38 UTC5h 10m
2026-07-15 ASA761 - Jul 15, 03:30 UTCJul 15, 08:55 UTC5h 25m

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?
Yes. Mode-S ACED21 is currently airborne.
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, ASA762, ASA62, ASA551.