Apparatus

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sensors Mode-S transponder

A74E7A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N570AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A74E7A
Octal
51647172
Decimal
10,964,602
Country
US
Tail
N570AS
Type
B738
No current signal · last broadcast Jul 26, 21:40 UTC
Flights observed
420
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Last known position

Most recent position reported by Mode-S A74E7A.

Country allocation

The ICAO 24-bit address A74E7A 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
ASA7 Alaska Airlines 9 2026-05-15
ASA390 - 8 2026-06-22
ASA389 Alaska Airlines 8 2026-04-17
ASA272 Alaska Airlines 6 2026-05-26
ASA702 - 5 2026-07-10
ASA4 Alaska Airlines 5 2026-07-25
ASA310 Alaska Airlines 5 2026-06-10
ASA9 Alaska Airlines 4 2026-07-25
ASA665 Alaska Airlines 4 2026-06-30
ASA64 - 4 2026-06-15
ASA585 Alaska Airlines 4 2026-06-04
ASA561 Alaska Airlines 4 2026-05-27
ASA5 - 4 2026-07-15
ASA407 Alaska Airlines 4 2026-06-01
ASA245 Alaska Airlines 4 2026-05-25
ASA1522 - 4 2026-07-15
ASA15 - 4 2026-06-21
ASA1439 - 4 2026-06-21
ASA1356 - 4 2026-07-08
ASA8 Alaska Airlines 3 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA540 SFO → AUS Jul 26, 17:55 UTCJul 26, 21:30 UTC3h 35m
2026-07-25 ASA9 DCA → PDX Jul 25, 21:25 UTCJul 26, 02:45 UTC5h 20m
2026-07-25 ASA4 SEA → DCA Jul 25, 15:20 UTCJul 25, 19:40 UTC4h 20m
2026-07-25 ASA1301 LAX → SEA Jul 25, 01:40 UTCJul 25, 03:55 UTC2h 15m
2026-07-25 ASA1301 LAX → SEA Jul 25, 01:47 UTCJul 25, 03:38 UTC1h 51m
2026-07-24 ASA713 SFO → JAC Jul 24, 22:00 UTCJul 25, 00:05 UTC2h 5m
2026-07-24 ASA1699 ONT → PDX Jul 24, 18:15 UTCJul 24, 20:00 UTC1h 45m
2026-07-24 ASA1449 SFO → SEA Jul 24, 15:05 UTCJul 24, 17:10 UTC2h 5m
2026-07-24 ASA1449 SFO → SEA Jul 24, 15:02 UTCJul 24, 17:10 UTC2h 8m
2026-07-24 ASA710 OGG → SFO Jul 24, 12:10 UTCJul 24, 12:55 UTC45m
2026-07-24 ASA566 FAT → SEA Jul 24, 03:45 UTCJul 24, 05:50 UTC2h 5m
2026-07-23 ASA1638 TPA → SAN Jul 23, 21:53 UTCJul 24, 02:03 UTC4h 10m
2026-07-23 ASA1638 TPA → SAN Jul 23, 21:55 UTCJul 24, 02:05 UTC4h 10m
2026-07-23 ASA1639 SAN → TPA Jul 23, 15:45 UTCJul 23, 20:05 UTC4h 20m
2026-07-23 ASA1617 DEN → SAN Jul 23, 12:20 UTCJul 23, 14:10 UTC1h 50m
2026-07-23 ASA1619 SAN → DEN Jul 23, 03:15 UTCJul 23, 05:10 UTC1h 55m
2026-07-23 ASA266 SJC → PDX Jul 23, 00:50 UTCJul 23, 01:35 UTC45m
2026-07-22 ASA266 SJC → PDX Jul 22, 20:50 UTCJul 22, 21:00 UTC10m
2026-07-22 ASA693 PDX → SFO Jul 22, 19:10 UTCJul 22, 19:25 UTC15m
2026-07-22 ASA693 PDX → SFO Jul 22, 14:10 UTCJul 22, 14:55 UTC45m
2026-07-22 ASA1601 LAX → SFO Jul 22, 03:40 UTCJul 22, 04:35 UTC55m
2026-07-22 ASA1601 LAX → SFO Jul 22, 03:42 UTCJul 22, 04:26 UTC44m
2026-07-21 ASA1523 LAX → SJO Jul 21, 23:55 UTCJul 22, 00:50 UTC55m
2026-07-21 ASA680 SEA → SFO Jul 21, 20:45 UTCJul 21, 22:30 UTC1h 45m
2026-07-21 ASA1365 PVR → SFO Jul 21, 15:25 UTCJul 21, 17:50 UTC2h 25m
2026-07-21 ASA751 PHX → PDX Jul 21, 03:10 UTCJul 21, 04:05 UTC55m
2026-07-20 ASA236 SFO → LAS Jul 20, 22:20 UTCJul 21, 00:10 UTC1h 49m
2026-07-20 ASA576 - Jul 20, 18:35 UTCJul 20, 20:35 UTC2h 0m
2026-07-20 ASA577 - Jul 20, 14:50 UTCJul 20, 17:05 UTC2h 15m
2026-07-20 ASA710 OGG → SFO Jul 20, 12:15 UTCJul 20, 13:00 UTC45m
2026-07-20 ASA566 FAT → SEA Jul 20, 04:30 UTCJul 20, 06:35 UTC2h 5m
2026-07-19 ASA1638 TPA → SAN Jul 19, 22:10 UTCJul 20, 02:20 UTC4h 10m
2026-07-19 ASA1639 SAN → TPA Jul 19, 15:50 UTCJul 19, 20:30 UTC4h 40m
2026-07-19 ASA228 - Jul 19, 00:05 UTCJul 19, 05:00 UTC4h 55m
2026-07-18 ASA789 - Jul 18, 17:20 UTCJul 18, 22:15 UTC4h 55m
2026-07-18 ASA291 - Jul 18, 05:45 UTCJul 18, 07:05 UTC1h 20m
2026-07-18 ASA780 DFW → SAN Jul 18, 01:00 UTCJul 18, 03:25 UTC2h 26m
2026-07-17 ASA549 ZIH → SFO Jul 17, 19:40 UTCJul 17, 23:10 UTC3h 30m
2026-07-17 ASA365 DFW → SEA Jul 17, 14:15 UTCJul 17, 17:55 UTC3h 40m
2026-07-17 ASA424 SEA → DFW Jul 17, 02:34 UTCJul 17, 06:00 UTC3h 25m
2026-07-16 ASA330 ABQ → SEA Jul 16, 21:55 UTCJul 17, 00:25 UTC2h 30m
2026-07-16 ASA330 ABQ → SEA Jul 16, 21:50 UTCJul 17, 00:10 UTC2h 20m
2026-07-16 ASA327 SEA → ABQ Jul 16, 18:00 UTCJul 16, 20:35 UTC2h 35m
2026-07-16 ASA701 LAS → SEA Jul 16, 13:05 UTCJul 16, 15:10 UTC2h 5m
2026-07-16 ASA704 SEA → LAS Jul 16, 03:40 UTCJul 16, 05:50 UTC2h 10m
2026-07-15 ASA1340 SFO → SEA Jul 15, 23:05 UTCJul 16, 00:30 UTC1h 25m
2026-07-15 ASA1522 LAX → SFO Jul 15, 20:40 UTCJul 15, 21:35 UTC55m
2026-07-15 ASA1522 LAX → SFO Jul 15, 20:55 UTCJul 15, 21:31 UTC36m
2026-07-15 ASA5 - Jul 15, 14:40 UTCJul 15, 19:10 UTC4h 30m
2026-07-14 ASA6 - Jul 14, 19:10 UTCJul 15, 00:00 UTC4h 49m

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 N570AS page for operator, model, and routing details .

Mode-S A74E7A frequently asked

What is Mode-S code A74E7A?
A74E7A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N570AS.
Where is Mode-S A74E7A registered?
Mode-S code A74E7A 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 A74E7A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A74E7A, octal 51647172, decimal 10,964,602.
What flights does A74E7A operate?
Mode-S A74E7A has broadcast 20 distinct callsigns, including ASA7, ASA390, ASA389, ASA272, ASA702.