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sensors Mode-S transponder

AD928B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N974AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
AD928B
Octal
53311213
Decimal
11,375,243
Country
US
Tail
N974AK
Type
B39M
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
461
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S AD928B.

Country allocation

The ICAO 24-bit address AD928B 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
ASA761 - 6 2026-07-09
ASA391 Alaska Airlines 6 2026-06-14
ASA222 - 6 2026-06-24
ASA513 - 5 2026-07-08
ASA200 - 5 2026-07-08
ASA762 - 4 2026-07-09
ASA755 Alaska Airlines 4 2026-05-21
ASA477 Alaska Airlines 4 2026-04-19
ASA47 Alaska Airlines 4 2026-07-24
ASA442 Alaska Airlines 4 2026-07-22
ASA385 Alaska Airlines 4 2026-06-13
ASA355 Alaska Airlines 4 2026-04-29
ASA313 Alaska Airlines 4 2026-06-28
ASA303 Alaska Airlines 4 2026-05-26
ASA204 Alaska Airlines 4 2026-07-26
ASA1394 - 4 2026-07-13
ASA775 - 3 2026-06-22
ASA679 - 3 2026-06-18
ASA649 Alaska Airlines 3 2026-05-07
ASA636 Alaska Airlines 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA204 LAX → SFO Jul 26, 20:30 UTCJul 26, 21:20 UTC50m
2026-07-26 ASA281 EWR → SEA Jul 26, 12:20 UTCJul 26, 16:45 UTC4h 25m
2026-07-26 ASA382 SEA → BNA Jul 26, 06:40 UTCJul 26, 10:15 UTC3h 35m
2026-07-26 ASA1368 SFO → PVR Jul 26, 02:20 UTCJul 26, 04:25 UTC2h 5m
2026-07-25 ASA1523 LAX → SJO Jul 25, 23:55 UTCJul 26, 00:55 UTC1h 0m
2026-07-25 ASA680 PDX → PHX Jul 25, 20:40 UTCJul 25, 22:30 UTC1h 50m
2026-07-25 ASA637 PHX → SEA Jul 25, 16:33 UTCJul 25, 18:41 UTC2h 8m
2026-07-25 ASA637 PHX → SEA Jul 25, 16:30 UTCJul 25, 18:45 UTC2h 15m
2026-07-25 ASA746 PVR → LAX Jul 25, 01:05 UTCJul 25, 03:45 UTC2h 40m
2026-07-24 ASA229 LAS → SEA Jul 24, 22:40 UTCJul 24, 23:30 UTC50m
2026-07-24 ASA441 MSY → SEA Jul 24, 20:20 UTCJul 24, 21:20 UTC1h 0m
2026-07-24 ASA47 ORD → ANC Jul 24, 15:20 UTCJul 24, 18:15 UTC2h 55m
2026-07-24 ASA1363 LAX → PVR Jul 24, 07:20 UTCJul 24, 10:40 UTC3h 20m
2026-07-23 ASA517 FLL → SEA Jul 23, 23:45 UTCJul 24, 05:25 UTC5h 40m
2026-07-23 ASA516 SEA → FLL Jul 23, 17:05 UTCJul 23, 22:30 UTC5h 25m
2026-07-23 ASA499 PDX → SEA Jul 23, 13:30 UTCJul 23, 14:05 UTC35m
2026-07-23 ASA1787 PHL → PDX Jul 23, 00:00 UTCJul 23, 05:35 UTC5h 35m
2026-07-22 ASA442 SEA → PHL Jul 22, 18:05 UTCJul 22, 22:20 UTC4h 15m
2026-07-22 ASA442 SEA → PHL Jul 22, 18:02 UTCJul 22, 22:15 UTC4h 13m
2026-07-22 ASA78 SEA → ANC Jul 22, 11:40 UTCJul 22, 16:30 UTC4h 50m
2026-07-21 ASA787 LAS → SEA Jul 21, 22:10 UTCJul 22, 03:30 UTC5h 20m
2026-07-21 ASA787 LAS → SEA Jul 21, 16:00 UTCJul 21, 20:20 UTC4h 20m
2026-07-21 ASA1444 SLC → SEA Jul 21, 12:35 UTCJul 21, 14:10 UTC1h 35m
2026-07-21 ASA1459 SEA → SLC Jul 21, 03:55 UTCJul 21, 05:30 UTC1h 35m
2026-07-20 ASA443 PHL → SEA Jul 20, 20:50 UTCJul 21, 02:15 UTC5h 25m
2026-07-20 ASA1776 PDX → PHL Jul 20, 14:45 UTCJul 20, 19:05 UTC4h 20m
2026-07-20 ASA779 LAS → PDX Jul 20, 04:15 UTCJul 20, 06:00 UTC1h 45m
2026-07-20 ASA776 LAS → SFO Jul 20, 01:42 UTCJul 20, 02:32 UTC50m
2026-07-19 ASA41 JFK → SFO Jul 19, 18:40 UTCJul 19, 23:55 UTC5h 15m
2026-07-19 ASA9263 IAD → JFK Jul 19, 14:35 UTCJul 19, 15:20 UTC45m
2026-07-18 ASA26 SEA → IAD Jul 18, 15:15 UTCJul 18, 19:55 UTC4h 40m
2026-07-18 ASA1301 - Jul 18, 01:20 UTCJul 18, 03:20 UTC2h 1m
2026-07-18 ASA1301 LAX → SEA Jul 18, 01:17 UTCJul 18, 03:07 UTC1h 50m
2026-07-17 ASA713 PDX → LAX Jul 17, 21:59 UTCJul 17, 23:39 UTC1h 40m
2026-07-17 ASA713 - Jul 17, 21:44 UTCJul 17, 23:55 UTC2h 10m
2026-07-17 ASA1467 LAS → PDX Jul 17, 18:30 UTCJul 17, 20:07 UTC1h 37m
2026-07-17 ASA1467 LAS → PDX Jul 17, 18:25 UTCJul 17, 20:10 UTC1h 45m
2026-07-17 ASA627 PDX → LAS Jul 17, 14:55 UTCJul 17, 16:49 UTC1h 55m
2026-07-17 ASA1421 SNA → SEA Jul 17, 01:39 UTCJul 17, 05:25 UTC3h 45m
2026-07-16 ASA438 - Jul 16, 23:55 UTCJul 17, 00:04 UTC10m
2026-07-16 ASA438 SEA → IAH Jul 16, 20:03 UTCJul 16, 23:40 UTC3h 37m
2026-07-16 ASA438 - Jul 16, 20:05 UTCJul 17, 00:04 UTC4h 0m
2026-07-16 ASA748 - Jul 16, 14:15 UTCJul 16, 16:40 UTC2h 25m
2026-07-16 ASA63 SEA → LAX Jul 16, 03:45 UTCJul 16, 06:20 UTC2h 35m
2026-07-15 ASA508 - Jul 15, 21:25 UTCJul 16, 01:35 UTC4h 10m
2026-07-15 ASA508 SEA → CVG Jul 15, 16:10 UTCJul 15, 20:05 UTC3h 55m
2026-07-15 ASA1444 SLC → SEA Jul 15, 12:30 UTCJul 15, 14:05 UTC1h 35m
2026-07-15 ASA373 SEA → SLC Jul 15, 00:19 UTCJul 15, 01:57 UTC1h 38m
2026-07-15 ASA373 SEA → SLC Jul 15, 00:20 UTCJul 15, 02:10 UTC1h 50m
2026-07-14 ASA580 - Jul 14, 20:30 UTCJul 14, 22:25 UTC1h 55m

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 N974AK page for operator, model, and routing details .

Mode-S AD928B frequently asked

What is Mode-S code AD928B?
AD928B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N974AK.
Where is Mode-S AD928B registered?
Mode-S code AD928B 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 AD928B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD928B, octal 53311213, decimal 11,375,243.
What flights does AD928B operate?
Mode-S AD928B has broadcast 20 distinct callsigns, including ASA761, ASA391, ASA222, ASA513, ASA200.