Apparatus

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sensors Mode-S transponder

A73220

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N563AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A73220
Octal
51631040
Decimal
10,957,344
Country
US
Tail
N563AS
Type
B738
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
400
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A73220.

Country allocation

The ICAO 24-bit address A73220 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 8 2026-07-23
ASA7 - 7 2026-06-14
ASA8 Alaska Airlines 6 2026-06-13
ASA67 Alaska Airlines 6 2026-04-18
ASA773 - 5 2026-07-18
ASA548 Alaska Airlines 5 2026-06-11
ASA759 Alaska Airlines 4 2026-06-11
ASA69 Alaska Airlines 4 2026-05-26
ASA508 - 4 2026-07-16
ASA45 - 4 2026-07-08
ASA216 Alaska Airlines 4 2026-06-10
ASA9800 Alaska Airlines 3 2026-05-07
ASA9 Alaska Airlines 3 2026-07-26
ASA699 - 3 2026-07-23
ASA668 - 3 2026-06-22
ASA658 Alaska Airlines 3 2026-05-01
ASA630 Alaska Airlines 3 2026-07-19
ASA60 Alaska Airlines 3 2026-05-01
ASA510 - 3 2026-06-22
ASA51 - 3 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA9 DCA → PDX Jul 26, 21:50 UTCJul 26, 22:00 UTC10m
2026-07-26 ASA4 SEA → DCA Jul 26, 15:20 UTCJul 26, 19:30 UTC4h 10m
2026-07-26 ASA423 SEA → SAT Jul 26, 12:56 UTCJul 26, 13:31 UTC35m
2026-07-26 ASA423 SEA → SAT Jul 26, 12:30 UTCJul 26, 12:40 UTC10m
2026-07-26 ASA1504 FAI → SEA Jul 26, 01:45 UTCJul 26, 05:35 UTC3h 50m
2026-07-26 ASA1504 FAI → SEA Jul 26, 01:45 UTCJul 26, 05:30 UTC3h 45m
2026-07-25 ASA1503 SEA → LIH Jul 25, 19:55 UTCJul 25, 23:30 UTC3h 35m
2026-07-25 ASA1503 SEA → LIH Jul 25, 19:51 UTCJul 25, 23:28 UTC3h 37m
2026-07-25 ASA428 AUS → SEA Jul 25, 17:40 UTCJul 25, 18:35 UTC55m
2026-07-25 ASA283 EWR → PDX Jul 25, 11:30 UTCJul 25, 16:00 UTC4h 30m
2026-07-25 ASA283 EWR → PDX Jul 25, 11:26 UTCJul 25, 15:53 UTC4h 27m
2026-07-25 ASA280 EWR → SEA Jul 25, 05:40 UTCJul 25, 09:20 UTC3h 40m
2026-07-25 ASA9802 SNA → SFO Jul 25, 01:14 UTCJul 25, 01:48 UTC34m
2026-07-25 ASA9802 SNA → SFO Jul 25, 01:15 UTCJul 25, 02:00 UTC45m
2026-07-23 ASA471 PVR → SAN Jul 23, 17:30 UTCJul 23, 19:15 UTC1h 45m
2026-07-23 ASA699 - Jul 23, 13:50 UTCJul 23, 16:10 UTC2h 20m
2026-07-23 ASA64 KTN → SEA Jul 23, 01:30 UTCJul 23, 03:05 UTC1h 35m
2026-07-22 ASA64 KTN → SEA Jul 22, 23:55 UTCJul 23, 00:05 UTC10m
2026-07-22 ASA64 KTN → SEA Jul 22, 21:25 UTCJul 22, 21:50 UTC25m
2026-07-22 ASA64 KTN → SEA Jul 22, 18:50 UTCJul 22, 20:00 UTC1h 10m
2026-07-22 ASA1339 CUN → LAX Jul 22, 15:15 UTCJul 22, 16:30 UTC1h 15m
2026-07-22 ASA1339 CUN → LAX Jul 22, 15:13 UTCJul 22, 16:26 UTC1h 13m
2026-07-22 ASA1807 DEN → PDX Jul 22, 02:50 UTCJul 22, 04:55 UTC2h 5m
2026-07-22 ASA1807 DEN → PDX Jul 22, 02:56 UTCJul 22, 04:54 UTC1h 58m
2026-07-21 ASA1809 PDX → DEN Jul 21, 21:55 UTCJul 22, 00:25 UTC2h 30m
2026-07-21 ASA1809 PDX → DEN Jul 21, 21:50 UTCJul 22, 00:20 UTC2h 30m
2026-07-21 ASA1405 BZE → SEA Jul 21, 18:00 UTCJul 21, 19:55 UTC1h 55m
2026-07-21 ASA1404 SEA → BZE Jul 21, 14:15 UTCJul 21, 16:20 UTC2h 5m
2026-07-21 ASA1520 LAX → SFO Jul 21, 08:55 UTCJul 21, 12:30 UTC3h 35m
2026-07-21 ASA1520 LAX → SFO Jul 21, 08:50 UTCJul 21, 12:26 UTC3h 36m
2026-07-21 ASA1612 ANC → FAI Jul 21, 05:00 UTCJul 21, 05:45 UTC45m
2026-07-21 ASA9232 - Jul 21, 00:55 UTCJul 21, 01:40 UTC45m
2026-07-21 ASA9232 DLG → ANC Jul 21, 00:48 UTCJul 21, 01:39 UTC51m
2026-07-20 ASA9230 - Jul 20, 22:20 UTCJul 20, 23:10 UTC50m
2026-07-20 ASA9230 ANC → DLG Jul 20, 22:18 UTCJul 20, 23:11 UTC53m
2026-07-20 ASA775 PDX → ANC Jul 20, 17:45 UTCJul 20, 21:10 UTC3h 25m
2026-07-20 ASA1630 EWR → PDX Jul 20, 10:50 UTCJul 20, 16:15 UTC5h 25m
2026-07-19 ASA263 IAD → SEA Jul 19, 23:10 UTCJul 20, 03:30 UTC4h 20m
2026-07-19 ASA630 LAS → SFO Jul 19, 20:05 UTCJul 19, 21:35 UTC1h 30m
2026-07-19 ASA1607 LAX → SFO Jul 19, 17:45 UTCJul 19, 18:35 UTC50m
2026-07-19 ASA505 SEA → LAX Jul 19, 13:25 UTCJul 19, 15:45 UTC2h 20m
2026-07-19 ASA774 - Jul 19, 00:50 UTCJul 19, 02:55 UTC2h 5m
2026-07-18 ASA773 - Jul 18, 21:20 UTCJul 18, 23:40 UTC2h 20m
2026-07-18 ASA629 LAS → SEA Jul 18, 17:45 UTCJul 18, 19:45 UTC2h 0m
2026-07-18 ASA777 - Jul 18, 14:10 UTCJul 18, 16:20 UTC2h 10m
2026-07-18 ASA777 PAE → LAS Jul 18, 14:08 UTCJul 18, 16:17 UTC2h 9m
2026-07-18 ASA366 LAS → PAE Jul 18, 03:40 UTCJul 18, 05:45 UTC2h 5m
2026-07-17 ASA1456 SJC → PDX Jul 17, 23:50 UTCJul 18, 02:00 UTC2h 10m
2026-07-17 ASA1456 SJC → PDX Jul 17, 23:47 UTCJul 18, 02:15 UTC2h 28m
2026-07-17 ASA596 - Jul 17, 20:35 UTCJul 17, 22:10 UTC1h 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 N563AS page for operator, model, and routing details .

Mode-S A73220 frequently asked

What is Mode-S code A73220?
A73220 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N563AS.
Where is Mode-S A73220 registered?
Mode-S code A73220 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 A73220 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A73220, octal 51631040, decimal 10,957,344.
What flights does A73220 operate?
Mode-S A73220 has broadcast 20 distinct callsigns, including ASA64, ASA7, ASA8, ASA67, ASA773.