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sensors Mode-S transponder

A79D78

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N590AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A79D78
Octal
51716570
Decimal
10,984,824
Country
US
Tail
N590AS
Type
B738
Broadcasting now · callsign ASA1389 · 37,000 ft
Flights observed
306
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A79D78 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A79D78 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
ASA1618 - 4 2026-07-10
ASA1382 Alaska Airlines 4 2026-04-30
ASA796 - 3 2026-06-18
ASA658 - 3 2026-06-27
ASA6 - 3 2026-07-11
ASA5 - 3 2026-07-12
ASA4 Alaska Airlines 3 2026-06-14
ASA336 - 3 2026-07-13
ASA312 - 3 2026-07-09
ASA268 Alaska Airlines 3 2026-05-19
ASA251 - 3 2026-06-26
ASA245 Alaska Airlines 3 2026-06-06
ASA234 Alaska Airlines 3 2026-06-08
ASA1522 - 3 2026-07-12
ASA1497 Alaska Airlines 3 2026-04-27
ASA9 - 2 2026-06-15
ASA799 Alaska Airlines 2 2026-04-27
ASA792 Alaska Airlines 2 2026-04-18
ASA790 Alaska Airlines 2 2026-04-24
ASA787 - 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASA1319 BOS → PDX Jul 13, 21:35 UTCJul 14, 02:55 UTC5h 20m
2026-07-13 ASA390 - Jul 13, 14:20 UTCJul 13, 19:50 UTC5h 30m
2026-07-13 ASA336 SEA → SAN Jul 13, 02:30 UTCJul 13, 05:01 UTC2h 30m
2026-07-13 ASA336 SEA → SAN Jul 13, 02:26 UTCJul 13, 04:57 UTC2h 31m
2026-07-12 ASA1340 SFO → SEA Jul 12, 23:15 UTCJul 13, 00:40 UTC1h 25m
2026-07-12 ASA1522 - Jul 12, 20:40 UTCJul 12, 21:30 UTC50m
2026-07-12 ASA1522 LAX → SFO Jul 12, 20:38 UTCJul 12, 21:28 UTC50m
2026-07-12 ASA5 - Jul 12, 14:10 UTCJul 12, 18:50 UTC4h 40m
2026-07-11 ASA6 - Jul 11, 19:45 UTCJul 12, 00:20 UTC4h 35m
2026-07-11 ASA524 - Jul 11, 01:25 UTCJul 11, 03:45 UTC2h 20m
2026-07-10 ASA465 - Jul 10, 21:20 UTCJul 10, 23:50 UTC2h 30m
2026-07-10 ASA1618 DEN → SAN Jul 10, 18:00 UTCJul 10, 20:00 UTC2h 0m
2026-07-10 ASA1618 - Jul 10, 14:45 UTCJul 10, 16:40 UTC1h 55m
2026-07-10 ASA336 PDX → FLL Jul 10, 03:50 UTCJul 10, 06:15 UTC2h 25m
2026-07-09 ASA312 - Jul 9, 20:20 UTCJul 9, 23:30 UTC3h 10m
2026-07-09 ASA312 - Jul 9, 16:20 UTCJul 9, 19:00 UTC2h 40m
2026-07-09 ASA213 - Jul 9, 13:35 UTCJul 9, 14:30 UTC55m
2026-07-09 ASA237 - Jul 9, 02:10 UTCJul 9, 07:30 UTC5h 20m
2026-07-09 ASA237 SEA → LIH Jul 9, 02:07 UTCJul 9, 07:29 UTC5h 22m
2026-07-08 ASA330 - Jul 8, 21:20 UTCJul 9, 00:10 UTC2h 50m
2026-07-08 ASA327 SEA → ABQ Jul 8, 17:20 UTCJul 8, 19:45 UTC2h 25m
2026-07-08 ASA620 - Jul 8, 13:45 UTCJul 8, 15:25 UTC1h 40m
2026-07-08 ASA620 SFO → SEA Jul 8, 13:30 UTCJul 8, 15:17 UTC1h 47m
2026-07-08 ASA291 - Jul 8, 04:55 UTCJul 8, 06:00 UTC1h 5m
2026-07-08 ASA780 - Jul 8, 00:50 UTCJul 8, 03:15 UTC2h 25m
2026-07-07 ASA549 ZIH → SFO Jul 7, 19:35 UTCJul 7, 23:10 UTC3h 35m
2026-07-07 ASA1 DCA → SEA Jul 7, 12:20 UTCJul 7, 17:25 UTC5h 5m
2026-07-06 ASA2 SEA → DCA Jul 6, 22:50 UTCJul 7, 03:20 UTC4h 30m
2026-07-06 ASA1311 SJC → SEA Jul 6, 17:41 UTCJul 6, 19:12 UTC1h 31m
2026-07-06 ASA1311 SJC → SEA Jul 6, 17:45 UTCJul 6, 19:20 UTC1h 35m
2026-07-06 ASA1448 SEA → SJC Jul 6, 14:25 UTCJul 6, 16:10 UTC1h 45m
2026-07-06 ASA1413 SJC → SEA Jul 6, 00:40 UTCJul 6, 02:15 UTC1h 35m
2026-07-06 ASA1413 SJC → SEA Jul 6, 00:39 UTCJul 6, 02:07 UTC1h 28m
2026-07-05 ASA1366 SEA → SJC Jul 5, 21:40 UTCJul 5, 23:40 UTC2h 0m
2026-07-05 ASA629 LAS → SEA Jul 5, 17:50 UTCJul 5, 19:50 UTC2h 0m
2026-07-05 ASA777 - Jul 5, 14:00 UTCJul 5, 16:10 UTC2h 10m
2026-07-05 ASA366 LAS → PAE Jul 5, 01:35 UTCJul 5, 03:40 UTC2h 5m
2026-07-04 ASA776 - Jul 4, 23:00 UTCJul 5, 00:10 UTC1h 10m
2026-07-04 ASA41 JFK → SFO Jul 4, 16:10 UTCJul 4, 21:55 UTC5h 45m
2026-07-04 ASA211 - Jul 4, 05:05 UTCJul 4, 10:05 UTC5h 0m
2026-07-03 ASA421 SEA → SFO Jul 3, 18:15 UTCJul 4, 02:25 UTC8h 10m
2026-07-03 ASA1325 SNA → SEA Jul 3, 14:09 UTCJul 3, 16:14 UTC2h 5m
2026-07-03 ASA518 - Jul 3, 03:05 UTCJul 3, 05:05 UTC2h 0m
2026-07-02 ASA1369 BWI → PDX Jul 2, 20:40 UTCJul 3, 01:45 UTC5h 5m
2026-07-02 ASA374 PDX → BWI Jul 2, 14:40 UTCJul 2, 19:20 UTC4h 40m
2026-07-02 ASA525 SFO → PDX Jul 2, 02:15 UTCJul 2, 03:40 UTC1h 25m
2026-07-01 ASA1561 ANC → SFO Jul 1, 20:40 UTCJul 2, 00:45 UTC4h 5m
2026-07-01 ASA55 ANC → ANC Jul 1, 13:40 UTCJul 1, 17:40 UTC4h 0m
2026-07-01 ASA1545 ORD → ANC Jul 1, 06:10 UTCJul 1, 12:00 UTC5h 50m
2026-07-01 ASA1493 - Jul 1, 00:40 UTCJul 1, 04:15 UTC3h 35m

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 N590AS page for operator, model, and routing details .

Mode-S A79D78 frequently asked

What is Mode-S code A79D78?
A79D78 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N590AS.
Where is Mode-S A79D78 registered?
Mode-S code A79D78 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 A79D78 broadcasting right now?
Yes. Mode-S A79D78 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A79D78, octal 51716570, decimal 10,984,824.
What flights does A79D78 operate?
Mode-S A79D78 has broadcast 20 distinct callsigns, including ASA1618, ASA1382, ASA796, ASA658, ASA6.