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sensors Mode-S transponder

AB79D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N839AK · operated by ALASKA AIRLINES

Hex
AB79D3
Octal
52674723
Decimal
11,237,843
Country
US
Tail
N839AK
Broadcasting now · callsign ASA374 · 37,000 ft
Flights observed
214
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:05 UTC

Current position

AB79D3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB79D3 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
ASA312 - 14 2026-07-19
ASA354 Alaska Airlines 13 2026-07-26
ASA355 Alaska Airlines 10 2026-07-26
ASA754 Alaska Airlines 8 2026-07-24
ASA755 Alaska Airlines 7 2026-07-25
ASA1536 Alaska Airlines 7 2026-07-24
ASA1535 Alaska Airlines 7 2026-07-24
ASA99 Alaska Airlines 6 2026-07-22
ASA305 Alaska Airlines 6 2026-06-12
ASA1512 Alaska Airlines 6 2026-07-18
ASA1417 Alaska Airlines 6 2026-07-21
ASA552 - 5 2026-07-20
ASA210 - 5 2026-07-18
ASA1452 Alaska Airlines 5 2026-07-22
ASA1430 Alaska Airlines 5 2026-07-21
ASA654 - 4 2026-07-22
BOE866 - 3 2026-05-12
ASA9801 Alaska Airlines 3 2026-06-11
ASA703 - 3 2026-07-18
ASA699 - 3 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA355 FLL → SAN Jul 26, 12:50 UTCJul 26, 19:55 UTC7h 5m
2026-07-26 ASA354 LAS → SFO Jul 26, 01:54 UTCJul 26, 09:02 UTC7h 8m
2026-07-26 ASA354 LAS → SFO Jul 26, 01:55 UTCJul 26, 09:05 UTC7h 11m
2026-07-25 ASA740 SFO → LAS Jul 25, 22:45 UTCJul 25, 23:45 UTC1h 0m
2026-07-25 ASA740 SFO → LAS Jul 25, 22:41 UTCJul 25, 23:37 UTC56m
2026-07-25 ASA1606 SNA → BOI Jul 25, 19:50 UTCJul 25, 21:20 UTC1h 30m
2026-07-25 ASA1605 BOI → SNA Jul 25, 16:45 UTCJul 25, 18:40 UTC1h 55m
2026-07-25 ASA248 ANC → SEA Jul 25, 14:20 UTCJul 25, 15:20 UTC1h 0m
2026-07-25 ASA1333 PVR → PDX Jul 25, 03:15 UTCJul 25, 06:15 UTC3h 0m
2026-07-25 ASA755 SEA → PVR Jul 25, 01:15 UTCJul 25, 02:05 UTC50m
2026-07-25 ASA755 SEA → PVR Jul 25, 01:16 UTCJul 25, 02:06 UTC50m
2026-07-24 ASA754 SJC → SEA Jul 24, 22:50 UTCJul 24, 23:35 UTC45m
2026-07-24 ASA1536 SEA → BZN Jul 24, 13:55 UTCJul 24, 21:15 UTC7h 20m
2026-07-24 ASA1535 SEA → PSP Jul 24, 04:20 UTCJul 24, 10:40 UTC6h 20m
2026-07-24 ASA755 SEA → PVR Jul 24, 01:20 UTCJul 24, 02:15 UTC55m
2026-07-23 ASA754 SJC → SEA Jul 23, 23:05 UTCJul 23, 23:55 UTC50m
2026-07-23 ASA1536 SEA → BZN Jul 23, 14:05 UTCJul 23, 21:40 UTC7h 35m
2026-07-23 ASA1535 SEA → PSP Jul 23, 04:15 UTCJul 23, 10:25 UTC6h 10m
2026-07-22 ASA99 SEA → ANC Jul 22, 23:50 UTCJul 23, 02:55 UTC3h 5m
2026-07-22 ASA99 SEA → ANC Jul 22, 23:46 UTCJul 23, 02:49 UTC3h 3m
2026-07-22 ASA654 - Jul 22, 19:35 UTCJul 22, 21:30 UTC1h 55m
2026-07-22 ASA654 ONT → SEA Jul 22, 19:30 UTCJul 22, 21:25 UTC1h 55m
2026-07-22 ASA1364 PDX → SJD Jul 22, 16:05 UTCJul 22, 18:20 UTC2h 15m
2026-07-22 ASA347 FLL → SFO Jul 22, 03:05 UTCJul 22, 05:05 UTC2h 0m
2026-07-22 ASA1452 SJD → SFO Jul 22, 00:55 UTCJul 22, 01:35 UTC40m
2026-07-21 ASA1452 SJD → SFO Jul 21, 21:05 UTCJul 21, 21:20 UTC15m
2026-07-21 ASA1430 LAX → SJD Jul 21, 19:00 UTCJul 21, 19:30 UTC30m
2026-07-21 ASA1430 LAX → SJD Jul 21, 13:20 UTCJul 21, 14:55 UTC1h 35m
2026-07-21 ASA1417 GDL → SJC Jul 21, 01:00 UTCJul 21, 03:10 UTC2h 10m
2026-07-20 ASA1417 GDL → SJC Jul 20, 21:30 UTCJul 20, 21:45 UTC15m
2026-07-20 ASA1417 GDL → SJC Jul 20, 21:38 UTCJul 21, 02:55 UTC5h 17m
2026-07-20 ASA552 - Jul 20, 14:15 UTCJul 20, 19:55 UTC5h 40m
2026-07-20 ASA1372 SEA → BUR Jul 20, 01:15 UTCJul 20, 03:30 UTC2h 15m
2026-07-19 ASA312 - Jul 19, 20:30 UTCJul 19, 23:50 UTC3h 20m
2026-07-19 ASA312 - Jul 19, 16:25 UTCJul 19, 18:55 UTC2h 30m
2026-07-19 ASA289 PHX → SEA Jul 19, 00:30 UTCJul 19, 03:00 UTC2h 30m
2026-07-18 ASA1371 SEA → PHX Jul 18, 19:10 UTCJul 18, 22:00 UTC2h 50m
2026-07-18 ASA210 FAI → SEA Jul 18, 13:48 UTCJul 18, 16:43 UTC2h 55m
2026-07-18 ASA1512 BZN → SEA Jul 18, 06:55 UTCJul 18, 09:46 UTC2h 51m
2026-07-18 ASA1512 BZN → SEA Jul 18, 06:40 UTCJul 18, 09:45 UTC3h 5m
2026-07-18 ASA703 BUR → SEA Jul 18, 02:35 UTCJul 18, 04:30 UTC1h 56m
2026-07-17 ASA331 ORD → SFO Jul 17, 22:45 UTCJul 18, 01:00 UTC2h 15m
2026-07-17 ASA355 KEF → SEA Jul 17, 13:05 UTCJul 17, 20:25 UTC7h 20m
2026-07-17 ASA354 - Jul 17, 08:35 UTCJul 17, 08:54 UTC20m
2026-07-17 ASA354 - Jul 17, 01:55 UTCJul 17, 06:54 UTC5h 0m
2026-07-16 ASA312 - Jul 16, 21:00 UTCJul 17, 00:10 UTC3h 10m
2026-07-16 ASA312 SEA → OMA Jul 16, 16:44 UTCJul 16, 19:30 UTC2h 45m
2026-07-16 ASA1301 LAX → SEA Jul 16, 01:25 UTCJul 16, 03:30 UTC2h 5m
2026-07-16 ASA1301 LAX → SEA Jul 16, 01:25 UTCJul 16, 03:14 UTC1h 49m
2026-07-15 ASA713 - Jul 15, 21:55 UTCJul 16, 00:00 UTC2h 5m

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 N839AK page for operator, model, and routing details .

Mode-S AB79D3 frequently asked

What is Mode-S code AB79D3?
AB79D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N839AK.
Where is Mode-S AB79D3 registered?
Mode-S code AB79D3 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 AB79D3 broadcasting right now?
Yes. Mode-S AB79D3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB79D3, octal 52674723, decimal 11,237,843.
What flights does AB79D3 operate?
Mode-S AB79D3 has broadcast 20 distinct callsigns, including ASA312, ASA354, ASA355, ASA754, ASA755.