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sensors Mode-S transponder

A7B779

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N597AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A7B779
Octal
51733571
Decimal
10,991,481
Country
US
Tail
N597AS
Type
B738
Broadcasting now · callsign ASA1356 · 19,175 ft
Flights observed
314
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Current position

A7B779 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A7B779 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
ASA64 Alaska Airlines 13 2026-07-20
ASA224 - 5 2026-07-17
ASA223 Alaska Airlines 5 2026-06-04
ASA796 Alaska Airlines 4 2026-06-07
ASA760 - 4 2026-06-20
ASA6 - 4 2026-07-10
ASA431 - 4 2026-07-17
ASA319 Alaska Airlines 4 2026-06-08
ASA31 Alaska Airlines 4 2026-04-15
ASA282 Alaska Airlines 4 2026-06-05
ASA24 Alaska Airlines 4 2026-05-12
ASA1 Alaska Airlines 4 2026-06-08
ASA776 - 3 2026-07-11
ASA699 - 3 2026-07-18
ASA660 - 3 2026-07-13
ASA621 Alaska Airlines 3 2026-07-23
ASA603 Alaska Airlines 3 2026-04-17
ASA493 Alaska Airlines 3 2026-04-18
ASA471 Alaska Airlines 3 2026-07-25
ASA41 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA551 PHL → SEA Jul 26, 20:05 UTCJul 26, 22:15 UTC2h 10m
2026-07-26 ASA340 SFO → EWR Jul 26, 15:10 UTCJul 26, 18:35 UTC3h 25m
2026-07-26 ASA400 SEA → BNA Jul 26, 02:30 UTCJul 26, 04:30 UTC2h 0m
2026-07-25 ASA400 SEA → BNA Jul 25, 23:25 UTCJul 26, 01:35 UTC2h 10m
2026-07-25 ASA471 PVR → SAN Jul 25, 17:50 UTCJul 25, 19:55 UTC2h 5m
2026-07-25 ASA1404 SEA → BZE Jul 25, 14:25 UTCJul 25, 16:40 UTC2h 15m
2026-07-25 ASA650 LAX → SFO Jul 25, 04:10 UTCJul 25, 06:25 UTC2h 15m
2026-07-25 ASA744 SEA → PHX Jul 25, 00:23 UTCJul 25, 03:05 UTC2h 42m
2026-07-25 ASA744 SEA → PHX Jul 25, 00:25 UTCJul 25, 03:05 UTC2h 40m
2026-07-24 ASA579 SAN → SEA Jul 24, 18:15 UTCJul 24, 22:15 UTC4h 0m
2026-07-24 ASA578 LAX → PDX Jul 24, 13:20 UTCJul 24, 16:35 UTC3h 15m
2026-07-24 ASA1509 SEA → BUR Jul 24, 08:25 UTCJul 24, 11:25 UTC3h 0m
2026-07-24 ASA284 LAX → EWR Jul 24, 02:10 UTCJul 24, 05:35 UTC3h 25m
2026-07-23 ASA471 PVR → SAN Jul 23, 23:45 UTCJul 24, 00:30 UTC45m
2026-07-23 ASA9803 LAS → SFO Jul 23, 22:05 UTCJul 23, 22:35 UTC30m
2026-07-23 ASA621 PDX → SFO Jul 23, 19:05 UTCJul 23, 20:10 UTC1h 5m
2026-07-23 ASA485 CHS → SEA Jul 23, 15:25 UTCJul 23, 16:40 UTC1h 15m
2026-07-23 ASA9 DCA → PDX Jul 23, 04:25 UTCJul 23, 04:55 UTC30m
2026-07-22 ASA9 DCA → PDX Jul 22, 21:50 UTCJul 23, 03:25 UTC5h 35m
2026-07-22 ASA4 SEA → DCA Jul 22, 15:15 UTCJul 22, 19:30 UTC4h 15m
2026-07-22 ASA371 FLL → SFO Jul 22, 02:45 UTCJul 22, 03:30 UTC45m
2026-07-22 ASA1433 SJD → SFO Jul 22, 01:10 UTCJul 22, 01:45 UTC35m
2026-07-21 ASA1464 SEA → LAX Jul 21, 22:14 UTCJul 21, 23:31 UTC1h 17m
2026-07-21 ASA1464 SEA → LAX Jul 21, 22:10 UTCJul 21, 23:40 UTC1h 30m
2026-07-21 ASA1328 SEA → SFO Jul 21, 19:15 UTCJul 21, 21:00 UTC1h 45m
2026-07-21 ASA587 ORD → SEA Jul 21, 13:20 UTCJul 21, 17:35 UTC4h 15m
2026-07-21 ASA1724 ANC → ORD Jul 21, 05:45 UTCJul 21, 08:15 UTC2h 30m
2026-07-21 ASA1724 ANC → ORD Jul 21, 05:41 UTCJul 21, 10:59 UTC5h 18m
2026-07-21 ASA352 ANC → SEA Jul 21, 01:55 UTCJul 21, 02:40 UTC45m
2026-07-20 ASA351 LAX → SEA Jul 20, 23:55 UTCJul 21, 00:45 UTC50m
2026-07-20 ASA83 SEA → ANC Jul 20, 19:20 UTCJul 20, 22:35 UTC3h 15m
2026-07-20 ASA277 PHL → SEA Jul 20, 11:50 UTCJul 20, 17:30 UTC5h 40m
2026-07-20 ASA522 SEA → PHL Jul 20, 05:30 UTCJul 20, 09:50 UTC4h 20m
2026-07-20 ASA64 KTN → SEA Jul 20, 01:40 UTCJul 20, 03:25 UTC1h 45m
2026-07-20 ASA64 KTN → SEA Jul 20, 00:10 UTCJul 20, 00:20 UTC10m
2026-07-19 ASA64 KTN → SEA Jul 19, 21:30 UTCJul 19, 21:55 UTC25m
2026-07-19 ASA64 KTN → SEA Jul 19, 19:00 UTCJul 19, 20:20 UTC1h 20m
2026-07-19 ASA694 SJC → PDX Jul 19, 16:20 UTCJul 19, 17:10 UTC50m
2026-07-19 ASA457 ORD → SFO Jul 19, 14:15 UTCJul 19, 14:55 UTC40m
2026-07-19 ASA669 SEA → ANC Jul 19, 06:15 UTCJul 19, 09:30 UTC3h 15m
2026-07-19 ASA214 - Jul 19, 00:25 UTCJul 19, 02:00 UTC1h 35m
2026-07-19 ASA214 KTN → SEA Jul 19, 00:21 UTCJul 19, 01:48 UTC1h 27m
2026-07-18 ASA92 - Jul 18, 21:10 UTCJul 18, 22:35 UTC1h 25m
2026-07-18 ASA471 - Jul 18, 17:35 UTCJul 18, 19:40 UTC2h 5m
2026-07-18 ASA699 - Jul 18, 13:40 UTCJul 18, 16:10 UTC2h 30m
2026-07-18 ASA64 - Jul 18, 01:39 UTCJul 18, 03:10 UTC1h 31m
2026-07-17 ASA64 - Jul 17, 23:55 UTCJul 18, 00:04 UTC10m
2026-07-17 ASA64 - Jul 17, 21:30 UTCJul 17, 21:50 UTC20m
2026-07-17 ASA64 - Jul 17, 18:44 UTCJul 17, 20:04 UTC1h 20m
2026-07-17 ASA224 ADQ → ANC Jul 17, 15:10 UTCJul 17, 15:53 UTC43m

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 N597AS page for operator, model, and routing details .

Mode-S A7B779 frequently asked

What is Mode-S code A7B779?
A7B779 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N597AS.
Where is Mode-S A7B779 registered?
Mode-S code A7B779 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 A7B779 broadcasting right now?
Yes. Mode-S A7B779 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7B779, octal 51733571, decimal 10,991,481.
What flights does A7B779 operate?
Mode-S A7B779 has broadcast 20 distinct callsigns, including ASA64, ASA224, ASA223, ASA796, ASA760.