Apparatus

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sensors Mode-S transponder

A602AB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N487AS · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A602AB
Octal
51401253
Decimal
10,879,659
Country
US
Tail
N487AS
Type
B739
Broadcasting now · callsign ASA645 · 34,000 ft
Flights observed
438
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A602AB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A602AB 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
ASA305 Alaska Airlines 7 2026-04-17
ASA625 Alaska Airlines 6 2026-05-17
ASA306 Alaska Airlines 6 2026-05-25
ASA618 - 5 2026-07-03
ASA450 - 5 2026-06-18
ASA271 - 5 2026-07-12
ASA729 Alaska Airlines 4 2026-05-16
ASA709 Alaska Airlines 4 2026-05-19
ASA508 - 4 2026-04-13
ASA501 Alaska Airlines 4 2026-06-06
ASA703 Alaska Airlines 3 2026-06-04
ASA695 - 3 2026-07-11
ASA684 - 3 2026-07-14
ASA624 Alaska Airlines 3 2026-04-17
ASA572 - 3 2026-06-26
ASA555 - 3 2026-06-13
ASA500 Alaska Airlines 3 2026-06-02
ASA437 - 3 2026-06-25
ASA432 Alaska Airlines 3 2026-06-05
ASA428 Alaska Airlines 3 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA737 SEA → SJC Jul 26, 22:40 UTCJul 26, 22:45 UTC5m
2026-07-26 ASA737 SEA → SJC Jul 26, 16:30 UTCJul 26, 20:40 UTC4h 10m
2026-07-26 ASA643 DEN → SEA Jul 26, 12:15 UTCJul 26, 14:40 UTC2h 25m
2026-07-26 ASA643 DEN → SEA Jul 26, 12:15 UTCJul 26, 14:30 UTC2h 15m
2026-07-25 ASA602 SEA → SFO Jul 25, 23:45 UTCJul 26, 01:50 UTC2h 5m
2026-07-25 ASA596 LAS → PDX Jul 25, 20:40 UTCJul 25, 22:10 UTC1h 30m
2026-07-25 ASA653 SFO → ZIH Jul 25, 17:50 UTCJul 25, 19:10 UTC1h 20m
2026-07-25 ASA440 MIA → PDX Jul 25, 11:20 UTCJul 25, 15:15 UTC3h 55m
2026-07-25 ASA440 MIA → PDX Jul 25, 11:30 UTCJul 25, 15:05 UTC3h 35m
2026-07-25 ASA307 LAX → SFO Jul 25, 01:45 UTCJul 25, 04:50 UTC3h 5m
2026-07-24 ASA439 SEA → SFO Jul 24, 19:55 UTCJul 25, 00:05 UTC4h 10m
2026-07-24 ASA1420 SJC → AUS Jul 24, 14:15 UTCJul 24, 18:10 UTC3h 55m
2026-07-24 ASA1609 ANC → PDX Jul 24, 00:30 UTCJul 24, 03:35 UTC3h 5m
2026-07-23 ASA83 SEA → ANC Jul 23, 19:45 UTCJul 23, 23:15 UTC3h 30m
2026-07-23 ASA215 PDX → SJC Jul 23, 13:55 UTCJul 23, 17:50 UTC3h 55m
2026-07-23 ASA1370 PVR → SFO Jul 23, 01:20 UTCJul 23, 05:00 UTC3h 40m
2026-07-22 ASA229 LAS → SEA Jul 22, 23:10 UTCJul 22, 23:55 UTC45m
2026-07-22 ASA229 LAS → SEA Jul 22, 23:05 UTCJul 22, 23:58 UTC53m
2026-07-22 ASA441 MSY → SEA Jul 22, 20:45 UTCJul 22, 21:55 UTC1h 10m
2026-07-22 ASA591 CUN → SFO Jul 22, 04:00 UTCJul 22, 05:25 UTC1h 25m
2026-07-22 ASA504 OAK → SEA Jul 22, 01:05 UTCJul 22, 02:40 UTC1h 35m
2026-07-21 ASA1383 - Jul 21, 21:35 UTCJul 21, 23:20 UTC1h 45m
2026-07-21 ASA1384 SEA → PVR Jul 21, 18:20 UTCJul 21, 20:10 UTC1h 50m
2026-07-21 ASA1384 SEA → PVR Jul 21, 18:15 UTCJul 21, 20:08 UTC1h 53m
2026-07-21 ASA1630 EWR → PDX Jul 21, 11:15 UTCJul 21, 16:45 UTC5h 30m
2026-07-20 ASA263 IAD → SEA Jul 20, 23:10 UTCJul 21, 03:20 UTC4h 10m
2026-07-20 ASA630 LAS → SFO Jul 20, 20:05 UTCJul 20, 21:40 UTC1h 35m
2026-07-20 ASA630 LAS → SFO Jul 20, 19:54 UTCJul 20, 21:32 UTC1h 38m
2026-07-20 ASA1607 LAX → SFO Jul 20, 17:30 UTCJul 20, 18:30 UTC1h 0m
2026-07-20 ASA1607 LAX → SFO Jul 20, 17:30 UTCJul 20, 18:16 UTC46m
2026-07-20 ASA505 SNA → SEA Jul 20, 13:20 UTCJul 20, 15:40 UTC2h 20m
2026-07-20 ASA403 SMF → SEA Jul 20, 04:05 UTCJul 20, 05:25 UTC1h 20m
2026-07-20 ASA1622 PDX → SMF Jul 20, 01:15 UTCJul 20, 02:30 UTC1h 15m
2026-07-19 ASA686 SEA → PDX Jul 19, 23:05 UTCJul 19, 23:40 UTC35m
2026-07-19 ASA686 SEA → PDX Jul 19, 23:04 UTCJul 19, 23:35 UTC31m
2026-07-19 ASA654 - Jul 19, 19:20 UTCJul 19, 20:45 UTC1h 25m
2026-07-19 ASA654 ONT → SEA Jul 19, 19:28 UTCJul 19, 21:08 UTC1h 40m
2026-07-19 ASA1364 PDX → SJD Jul 19, 15:45 UTCJul 19, 18:00 UTC2h 15m
2026-07-19 ASA1364 PDX → SJD Jul 19, 15:45 UTCJul 19, 18:03 UTC2h 18m
2026-07-19 ASA423 SEA → SAT Jul 19, 12:35 UTCJul 19, 13:35 UTC1h 0m
2026-07-19 ASA1524 DTW → SEA Jul 19, 04:55 UTCJul 19, 05:45 UTC50m
2026-07-19 ASA1524 DTW → SEA Jul 19, 04:52 UTCJul 19, 05:41 UTC49m
2026-07-18 ASA1519 ANC → FAI Jul 18, 22:50 UTCJul 19, 00:45 UTC1h 55m
2026-07-18 ASA1519 ANC → FAI Jul 18, 22:48 UTCJul 19, 01:58 UTC3h 10m
2026-07-18 ASA1525 MCO → SEA Jul 18, 18:40 UTCJul 18, 21:30 UTC2h 50m
2026-07-18 ASA349 LAS → PDX Jul 18, 15:15 UTCJul 18, 17:00 UTC1h 45m
2026-07-18 ASA1636 ANC → LAS Jul 18, 08:15 UTCJul 18, 12:50 UTC4h 35m
2026-07-17 ASA1545 ORD → ANC Jul 17, 19:15 UTCJul 18, 01:20 UTC6h 5m
2026-07-17 ASA1493 - Jul 17, 01:00 UTCJul 17, 04:35 UTC3h 35m
2026-07-16 ASA35 JFK → SAN Jul 16, 17:10 UTCJul 16, 22:05 UTC4h 55m

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 N487AS page for operator, model, and routing details .

Mode-S A602AB frequently asked

What is Mode-S code A602AB?
A602AB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N487AS.
Where is Mode-S A602AB registered?
Mode-S code A602AB 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 A602AB broadcasting right now?
Yes. Mode-S A602AB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A602AB, octal 51401253, decimal 10,879,659.
What flights does A602AB operate?
Mode-S A602AB has broadcast 20 distinct callsigns, including ASA305, ASA625, ASA306, ASA618, ASA450.