Apparatus

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sensors Mode-S transponder

ACDBEC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N928AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
ACDBEC
Octal
53155754
Decimal
11,328,492
Country
US
Tail
N928AK
Type
B39M
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
446
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S ACDBEC.

Country allocation

The ICAO 24-bit address ACDBEC 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
ASA737 - 6 2026-07-10
ASA517 - 6 2026-06-14
ASA267 - 5 2026-07-01
ASA222 Alaska Airlines 5 2026-05-06
ASA768 Alaska Airlines 4 2026-07-21
ASA636 Alaska Airlines 4 2026-06-08
ASA621 Alaska Airlines 4 2026-06-07
ASA537 Alaska Airlines 4 2026-05-20
ASA450 - 4 2026-06-24
ASA41 Alaska Airlines 4 2026-04-16
ASA404 - 4 2026-07-23
ASA172 Alaska Airlines 4 2026-04-14
ASA1334 Alaska Airlines 4 2026-04-17
ASA94 Alaska Airlines 3 2026-06-26
ASA93 Alaska Airlines 3 2026-04-20
ASA84 Alaska Airlines 3 2026-05-27
ASA731 Alaska Airlines 3 2026-06-02
ASA73 - 3 2026-07-17
ASA718 - 3 2026-06-25
ASA706 Alaska Airlines 3 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA380 SEA → MSP Jul 26, 21:45 UTCJul 26, 23:00 UTC1h 15m
2026-07-26 ASA1394 SJD → SJC Jul 26, 17:55 UTCJul 26, 20:15 UTC2h 20m
2026-07-26 ASA311 SEA → SFO Jul 26, 10:15 UTCJul 26, 16:05 UTC5h 50m
2026-07-25 ASA460 SEA → BOS Jul 25, 22:45 UTCJul 26, 03:20 UTC4h 35m
2026-07-25 ASA475 ATL → SAN Jul 25, 19:00 UTCJul 25, 20:43 UTC1h 43m
2026-07-25 ASA475 ATL → SAN Jul 25, 18:45 UTCJul 25, 20:55 UTC2h 10m
2026-07-25 ASA1471 SFO → SEA Jul 25, 14:40 UTCJul 25, 17:10 UTC2h 30m
2026-07-25 ASA493 SEA → BOS Jul 25, 03:40 UTCJul 25, 06:00 UTC2h 20m
2026-07-24 ASA602 SEA → SFO Jul 24, 23:55 UTCJul 25, 02:10 UTC2h 15m
2026-07-24 ASA630 LAS → SFO Jul 24, 20:45 UTCJul 24, 21:00 UTC15m
2026-07-24 ASA630 LAS → SFO Jul 24, 20:32 UTCJul 24, 22:02 UTC1h 30m
2026-07-24 ASA1607 LAX → SFO Jul 24, 18:10 UTCJul 24, 19:00 UTC50m
2026-07-24 ASA505 SNA → SEA Jul 24, 13:50 UTCJul 24, 16:15 UTC2h 25m
2026-07-24 ASA221 JFK → SEA Jul 24, 08:46 UTCJul 24, 11:21 UTC2h 35m
2026-07-24 ASA221 JFK → SEA Jul 24, 08:45 UTCJul 24, 11:00 UTC2h 15m
2026-07-24 ASA667 SEA → RDM Jul 24, 03:50 UTCJul 24, 04:45 UTC55m
2026-07-24 ASA667 SEA → RDM Jul 24, 03:49 UTCJul 24, 07:07 UTC3h 18m
2026-07-23 ASA313 SEA → DTW Jul 23, 21:40 UTCJul 24, 02:00 UTC4h 20m
2026-07-23 ASA313 SEA → DTW Jul 23, 16:30 UTCJul 23, 20:00 UTC3h 30m
2026-07-23 ASA620 SEA → DEN Jul 23, 13:15 UTCJul 23, 14:45 UTC1h 30m
2026-07-23 ASA404 - Jul 23, 05:35 UTCJul 23, 06:25 UTC50m
2026-07-23 ASA404 - Jul 23, 02:05 UTCJul 23, 02:15 UTC10m
2026-07-22 ASA204 LAX → SFO Jul 22, 19:04 UTCJul 23, 00:37 UTC5h 33m
2026-07-22 ASA204 LAX → SFO Jul 22, 19:05 UTCJul 22, 20:05 UTC1h 0m
2026-07-22 ASA1426 LAX → ZIH Jul 22, 15:40 UTCJul 22, 17:03 UTC1h 23m
2026-07-22 ASA1426 LAX → ZIH Jul 22, 15:30 UTCJul 22, 17:00 UTC1h 30m
2026-07-22 ASA1411 PVR → SEA Jul 22, 02:50 UTCJul 22, 03:35 UTC45m
2026-07-21 ASA1411 PVR → SEA Jul 21, 23:15 UTCJul 21, 23:30 UTC15m
2026-07-21 ASA768 SEA → LAS Jul 21, 15:55 UTCJul 21, 21:20 UTC5h 25m
2026-07-21 ASA768 SEA → LAS Jul 21, 15:50 UTCJul 21, 21:10 UTC5h 20m
2026-07-21 ASA278 FAI → ANC Jul 21, 00:50 UTCJul 21, 02:50 UTC2h 0m
2026-07-21 ASA278 FAI → ANC Jul 21, 00:48 UTCJul 21, 02:37 UTC1h 49m
2026-07-20 ASA1600 SFO → LAS Jul 20, 22:00 UTCJul 20, 23:05 UTC1h 5m
2026-07-20 ASA1428 SFO → SJD Jul 20, 19:20 UTCJul 20, 20:50 UTC1h 30m
2026-07-20 ASA645 PHX → SEA Jul 20, 14:43 UTCJul 20, 16:59 UTC2h 16m
2026-07-20 ASA645 PHX → SEA Jul 20, 14:35 UTCJul 20, 17:00 UTC2h 25m
2026-07-20 ASA746 PVR → LAX Jul 20, 02:05 UTCJul 20, 04:30 UTC2h 25m
2026-07-19 ASA1302 SEA → LAX Jul 19, 23:40 UTCJul 20, 00:50 UTC1h 10m
2026-07-19 ASA1302 SEA → LAX Jul 19, 23:39 UTCJul 20, 00:51 UTC1h 12m
2026-07-19 ASA227 JFK → SFO Jul 19, 17:00 UTCJul 19, 22:20 UTC5h 20m
2026-07-19 ASA211 - Jul 19, 05:05 UTCJul 19, 09:55 UTC4h 50m
2026-07-18 ASA1379 SFO → PVR Jul 18, 23:38 UTCJul 19, 02:12 UTC2h 34m
2026-07-18 ASA421 SEA → SFO Jul 18, 18:30 UTCJul 19, 02:20 UTC7h 50m
2026-07-18 ASA748 SFO → LAS Jul 18, 14:10 UTCJul 18, 16:10 UTC2h 0m
2026-07-18 ASA748 SFO → LAS Jul 18, 14:08 UTCJul 18, 15:59 UTC1h 51m
2026-07-18 ASA751 - Jul 18, 03:40 UTCJul 18, 04:35 UTC55m
2026-07-18 ASA751 SFO → LAX Jul 18, 03:36 UTCJul 18, 04:25 UTC49m
2026-07-18 ASA1385 SEA → SFO Jul 18, 00:35 UTCJul 18, 02:25 UTC1h 50m
2026-07-17 ASA332 ANC → SEA Jul 17, 19:49 UTCJul 17, 23:00 UTC3h 10m
2026-07-17 ASA73 - Jul 17, 15:44 UTCJul 17, 16:59 UTC1h 15m

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 N928AK page for operator, model, and routing details .

Mode-S ACDBEC frequently asked

What is Mode-S code ACDBEC?
ACDBEC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N928AK.
Where is Mode-S ACDBEC registered?
Mode-S code ACDBEC 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 ACDBEC 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 ACDBEC, octal 53155754, decimal 11,328,492.
What flights does ACDBEC operate?
Mode-S ACDBEC has broadcast 20 distinct callsigns, including ASA737, ASA517, ASA267, ASA222, ASA768.