Apparatus

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sensors Mode-S transponder

AB148B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N813AK · BOEING 737 MAX 8 · operated by ALASKA AIRLINES INC

Hex
AB148B
Octal
52612213
Decimal
11,211,915
Country
US
Tail
N813AK
Type
B38M
No current signal · last broadcast 5h ago
Flights observed
368
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AB148B.

Country allocation

The ICAO 24-bit address AB148B 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
ASA1353 - 13 2026-07-10
ASA1354 - 12 2026-07-10
ASA1452 - 11 2026-07-08
ASA699 Alaska Airlines 6 2026-04-19
ASA482 - 6 2026-07-13
ASA552 - 5 2026-07-07
ASA347 - 5 2026-07-09
ASA312 - 5 2026-07-06
ASA234 - 5 2026-06-18
ASA1430 Alaska Airlines 5 2026-07-08
ASA1417 Alaska Airlines 5 2026-07-07
ASA717 Alaska Airlines 4 2026-05-27
ASA696 - 4 2026-07-09
ASA616 Alaska Airlines 4 2026-06-09
ASA555 - 4 2026-06-26
ASA546 Alaska Airlines 4 2026-04-27
ASA400 Alaska Airlines 4 2026-06-07
ASA251 - 4 2026-06-23
ASA1585 Alaska Airlines 4 2026-07-07
ASA1405 Alaska Airlines 4 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA289 PHX → SEA Jul 14, 00:00 UTCJul 14, 02:25 UTC2h 25m
2026-07-13 ASA1371 SEA → PHX Jul 13, 19:50 UTCJul 13, 22:25 UTC2h 35m
2026-07-13 ASA482 - Jul 13, 16:15 UTCJul 13, 18:10 UTC1h 55m
2026-07-13 ASA482 LAX → SEA Jul 13, 16:27 UTCJul 13, 18:05 UTC1h 38m
2026-07-13 ASA751 SFO → LAX Jul 13, 03:20 UTCJul 13, 04:25 UTC1h 5m
2026-07-12 ASA561 - Jul 12, 21:15 UTCJul 12, 22:15 UTC1h 0m
2026-07-12 ASA560 - Jul 12, 18:40 UTCJul 12, 19:50 UTC1h 10m
2026-07-12 ASA687 LAX → SFO Jul 12, 16:20 UTCJul 12, 17:15 UTC55m
2026-07-11 ASA1329 HAF → LAX Jul 11, 15:40 UTCJul 11, 16:35 UTC55m
2026-07-11 ASA1625 - Jul 11, 13:40 UTCJul 11, 14:35 UTC55m
2026-07-10 ASA1354 - Jul 10, 09:10 UTCJul 10, 12:45 UTC3h 35m
2026-07-10 ASA1353 - Jul 10, 05:15 UTCJul 10, 05:30 UTC15m
2026-07-10 ASA1353 - Jul 10, 00:55 UTCJul 10, 04:30 UTC3h 35m
2026-07-09 ASA696 - Jul 9, 21:05 UTCJul 9, 23:15 UTC2h 10m
2026-07-09 ASA705 OAK → SEA Jul 9, 17:30 UTCJul 9, 19:10 UTC1h 40m
2026-07-09 ASA705 OAK → SEA Jul 9, 17:28 UTCJul 9, 18:55 UTC1h 27m
2026-07-09 ASA533 SEA → SFO Jul 9, 14:30 UTCJul 9, 16:10 UTC1h 40m
2026-07-09 ASA347 BUR → SEA Jul 9, 03:05 UTCJul 9, 05:15 UTC2h 10m
2026-07-08 ASA1452 - Jul 8, 20:55 UTCJul 9, 01:40 UTC4h 45m
2026-07-08 ASA1430 LAX → SJD Jul 8, 19:10 UTCJul 8, 19:25 UTC15m
2026-07-08 ASA1430 LAX → SJD Jul 8, 13:25 UTCJul 8, 15:15 UTC1h 50m
2026-07-07 ASA1417 GDL → SJC Jul 7, 21:30 UTCJul 8, 03:15 UTC5h 45m
2026-07-07 ASA552 - Jul 7, 14:25 UTCJul 7, 19:35 UTC5h 10m
2026-07-07 ASA1585 SEA → BUR Jul 7, 01:20 UTCJul 7, 03:25 UTC2h 5m
2026-07-06 ASA312 - Jul 6, 20:25 UTCJul 6, 23:35 UTC3h 10m
2026-07-06 ASA312 OMA → SEA Jul 6, 20:35 UTCJul 6, 23:19 UTC2h 44m
2026-07-06 ASA312 - Jul 6, 16:15 UTCJul 6, 18:55 UTC2h 40m
2026-07-06 ASA347 BUR → SEA Jul 6, 03:23 UTCJul 6, 05:05 UTC1h 42m
2026-07-06 ASA347 BUR → SEA Jul 6, 03:05 UTCJul 6, 05:10 UTC2h 5m
2026-07-06 ASA1452 - Jul 6, 00:50 UTCJul 6, 01:25 UTC35m
2026-07-05 ASA1452 - Jul 5, 20:50 UTCJul 5, 21:10 UTC20m
2026-07-05 ASA1430 LAX → SJD Jul 5, 13:15 UTCJul 5, 19:20 UTC6h 5m
2026-07-04 ASA1417 GDL → SJC Jul 4, 21:25 UTCJul 5, 02:55 UTC5h 30m
2026-07-04 ASA552 - Jul 4, 14:10 UTCJul 4, 19:35 UTC5h 25m
2026-07-04 ASA1585 SEA → BUR Jul 4, 01:35 UTCJul 4, 03:30 UTC1h 55m
2026-07-03 ASA312 - Jul 3, 20:50 UTCJul 4, 00:00 UTC3h 10m
2026-07-03 ASA312 - Jul 3, 16:50 UTCJul 3, 19:35 UTC2h 45m
2026-07-03 ASA481 SEA → BZE Jul 3, 03:05 UTCJul 3, 04:55 UTC1h 50m
2026-07-02 ASA319 SEA → SJC Jul 2, 23:45 UTCJul 3, 01:25 UTC1h 40m
2026-07-02 ASA630 LAS → SFO Jul 2, 20:25 UTCJul 2, 22:10 UTC1h 45m
2026-07-02 ASA1607 LAX → SFO Jul 2, 17:50 UTCJul 2, 18:55 UTC1h 5m
2026-07-02 ASA1607 LAX → SFO Jul 2, 17:37 UTCJul 2, 18:42 UTC1h 5m
2026-07-02 ASA1354 GUA → LAX Jul 2, 08:30 UTCJul 2, 12:40 UTC4h 10m
2026-07-02 ASA1354 - Jul 2, 08:10 UTCJul 2, 08:15 UTC5m
2026-07-02 ASA1353 - Jul 2, 05:00 UTCJul 2, 05:10 UTC10m
2026-07-02 ASA1353 - Jul 2, 00:50 UTCJul 2, 04:15 UTC3h 25m
2026-07-01 ASA696 SEA → LAX Jul 1, 21:05 UTCJul 1, 23:10 UTC2h 5m
2026-07-01 ASA665 PDX → ANC Jul 1, 01:40 UTCJul 1, 03:20 UTC1h 40m
2026-06-30 ASA368 SEA → SLC Jun 30, 22:20 UTCJun 30, 23:50 UTC1h 30m
2026-06-30 ASA368 SEA → SLC Jun 30, 22:18 UTCJun 30, 23:48 UTC1h 30m

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 N813AK page for operator, model, and routing details .

Mode-S AB148B frequently asked

What is Mode-S code AB148B?
AB148B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N813AK.
Where is Mode-S AB148B registered?
Mode-S code AB148B 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 AB148B broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB148B, octal 52612213, decimal 11,211,915.
What flights does AB148B operate?
Mode-S AB148B has broadcast 20 distinct callsigns, including ASA1353, ASA1354, ASA1452, ASA699, ASA482.