Apparatus

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sensors Mode-S transponder

AD8B1D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N972AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
AD8B1D
Octal
53305435
Decimal
11,373,341
Country
US
Tail
N972AK
Type
B39M
Transponder active on ground
Flights observed
347
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AD8B1D.

Country allocation

The ICAO 24-bit address AD8B1D 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
ASA62 Alaska Airlines 8 2026-07-04
ASA763 - 5 2026-07-10
ASA207 - 5 2026-07-10
ASA622 Alaska Airlines 4 2026-05-20
ASA50 - 4 2026-06-27
ASA494 Alaska Airlines 4 2026-06-05
ASA49 - 4 2026-06-27
ASA423 Alaska Airlines 4 2026-07-03
ASA206 Alaska Airlines 4 2026-06-23
ASA1319 Alaska Airlines 4 2026-04-17
ASA739 Alaska Airlines 3 2026-06-14
ASA626 - 3 2026-04-13
ASA537 Alaska Airlines 3 2026-06-03
ASA513 - 3 2026-06-24
ASA454 - 3 2026-04-13
ASA41 Alaska Airlines 3 2026-06-12
ASA358 Alaska Airlines 3 2026-04-16
ASA353 - 3 2026-06-23
ASA325 Alaska Airlines 3 2026-04-17
ASA324 Alaska Airlines 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA329 - Jul 14, 01:55 UTCJul 14, 05:15 UTC3h 20m
2026-07-13 ASA410 SEA → ORD Jul 13, 20:30 UTCJul 14, 00:05 UTC3h 35m
2026-07-13 ASA410 SEA → ORD Jul 13, 20:27 UTCJul 13, 23:52 UTC3h 25m
2026-07-13 ASA82 - Jul 13, 14:10 UTCJul 13, 17:30 UTC3h 20m
2026-07-13 ASA1899 LAX → ANC Jul 13, 03:40 UTCJul 13, 08:10 UTC4h 30m
2026-07-12 ASA1418 - Jul 12, 17:50 UTCJul 13, 01:05 UTC7h 15m
2026-07-12 ASA505 SEA → LAX Jul 12, 13:01 UTCJul 12, 15:25 UTC2h 25m
2026-07-12 ASA1333 ANC → SEA Jul 12, 03:22 UTCJul 12, 06:04 UTC2h 42m
2026-07-12 ASA1333 ANC → SEA Jul 12, 03:10 UTCJul 12, 06:15 UTC3h 5m
2026-07-11 ASA318 SFO → ANC Jul 11, 21:50 UTCJul 12, 01:55 UTC4h 5m
2026-07-11 ASA321 ANC → SFO Jul 11, 16:17 UTCJul 11, 20:18 UTC4h 1m
2026-07-11 ASA321 - Jul 11, 16:15 UTCJul 11, 20:25 UTC4h 10m
2026-07-11 ASA771 - Jul 11, 04:45 UTCJul 11, 07:45 UTC3h 0m
2026-07-10 ASA419 MCO → SEA Jul 10, 21:15 UTCJul 11, 02:45 UTC5h 30m
2026-07-10 ASA300 PDX → MCO Jul 10, 14:10 UTCJul 10, 19:10 UTC5h 0m
2026-07-10 ASA207 - Jul 10, 04:45 UTCJul 10, 06:35 UTC1h 50m
2026-07-10 ASA207 LAX → PDX Jul 10, 04:44 UTCJul 10, 06:41 UTC1h 57m
2026-07-10 ASA763 - Jul 10, 02:25 UTCJul 10, 03:15 UTC50m
2026-07-09 ASA763 - Jul 9, 22:25 UTCJul 9, 22:35 UTC10m
2026-07-09 ASA1416 SJC → GDL Jul 9, 15:15 UTCJul 9, 20:40 UTC5h 25m
2026-07-09 ASA1411 - Jul 9, 03:05 UTCJul 9, 03:40 UTC35m
2026-07-08 ASA1411 - Jul 8, 23:10 UTCJul 8, 23:25 UTC15m
2026-07-08 ASA768 SEA → LAS Jul 8, 16:05 UTCJul 8, 21:25 UTC5h 20m
2026-07-08 ASA1351 - Jul 8, 00:05 UTCJul 8, 13:25 UTC13h 20m
2026-07-07 ASA1604 SFO → LAX Jul 7, 21:05 UTCJul 7, 22:00 UTC55m
2026-07-07 ASA1604 SFO → LAX Jul 7, 21:04 UTCJul 7, 21:49 UTC45m
2026-07-07 ASA227 JFK → SFO Jul 7, 14:05 UTCJul 7, 19:30 UTC5h 25m
2026-07-07 ASA22 SEA → JFK Jul 7, 06:30 UTCJul 7, 11:10 UTC4h 40m
2026-07-07 ASA417 - Jul 7, 01:15 UTCJul 7, 03:35 UTC2h 20m
2026-07-06 ASA1395 - Jul 6, 21:55 UTCJul 6, 23:00 UTC1h 5m
2026-07-06 ASA1414 - Jul 6, 17:55 UTCJul 6, 19:00 UTC1h 5m
2026-07-06 ASA1414 SAN → SJD Jul 6, 17:57 UTCJul 6, 19:43 UTC1h 46m
2026-07-06 ASA1361 SEA → SAN Jul 6, 13:35 UTCJul 6, 16:00 UTC2h 25m
2026-07-06 ASA1362 - Jul 6, 05:40 UTCJul 6, 07:50 UTC2h 10m
2026-07-06 ASA369 - Jul 6, 02:10 UTCJul 6, 04:15 UTC2h 5m
2026-07-05 ASA229 - Jul 5, 23:55 UTCJul 6, 00:45 UTC50m
2026-07-05 ASA229 BOI → PDX Jul 5, 23:52 UTCJul 6, 00:42 UTC50m
2026-07-05 ASA441 MSY → SEA Jul 5, 21:25 UTCJul 5, 22:25 UTC1h 0m
2026-07-05 ASA1327 SFO → SEA Jul 5, 16:35 UTCJul 5, 18:10 UTC1h 35m
2026-07-05 ASA634 LAS → SFO Jul 5, 04:15 UTCJul 5, 05:20 UTC1h 5m
2026-07-05 ASA1458 SEA → LAS Jul 5, 00:20 UTCJul 5, 02:20 UTC2h 0m
2026-07-04 ASA62 KTN → SEA Jul 4, 21:30 UTCJul 4, 23:00 UTC1h 30m
2026-07-04 ASA62 KTN → SEA Jul 4, 19:30 UTCJul 4, 19:55 UTC25m
2026-07-04 ASA62 KTN → SEA Jul 4, 17:55 UTCJul 4, 18:10 UTC15m
2026-07-04 ASA62 KTN → SEA Jul 4, 15:15 UTCJul 4, 16:30 UTC1h 15m
2026-07-04 ASA1545 ORD → ANC Jul 4, 08:00 UTCJul 4, 13:55 UTC5h 55m
2026-07-04 ASA1493 - Jul 4, 01:40 UTCJul 4, 05:40 UTC4h 0m
2026-07-03 ASA551 DFW → SAN Jul 3, 21:08 UTCJul 3, 23:48 UTC2h 40m
2026-07-03 ASA551 - Jul 3, 21:15 UTCJul 3, 23:50 UTC2h 35m
2026-07-03 ASA340 SEA → DFW Jul 3, 16:10 UTCJul 3, 19:25 UTC3h 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 N972AK page for operator, model, and routing details .

Mode-S AD8B1D frequently asked

What is Mode-S code AD8B1D?
AD8B1D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N972AK.
Where is Mode-S AD8B1D registered?
Mode-S code AD8B1D 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 AD8B1D broadcasting right now?
Mode-S AD8B1D is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD8B1D, octal 53305435, decimal 11,373,341.
What flights does AD8B1D operate?
Mode-S AD8B1D has broadcast 20 distinct callsigns, including ASA62, ASA763, ASA207, ASA622, ASA50.