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sensors Mode-S transponder

A5A888

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N464AS · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A5A888
Octal
51324210
Decimal
10,856,584
Country
US
Tail
N464AS
Type
B739
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
221
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S A5A888.

Country allocation

The ICAO 24-bit address A5A888 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
ASA254 Alaska Airlines 4 2026-07-26
ASA9430 Alaska Airlines 3 2026-06-10
ASA9421 - 3 2026-04-15
ASA577 Alaska Airlines 3 2026-07-26
ASA491 Alaska Airlines 3 2026-04-13
ASA489 - 3 2026-07-12
ASA453 - 3 2026-04-14
ASA398 Alaska Airlines 3 2026-04-14
ASA340 - 3 2026-06-12
ASA206 Alaska Airlines 3 2026-07-24
ASA1635 - 3 2026-07-14
ASA1632 Alaska Airlines 3 2026-07-23
ASA1415 Alaska Airlines 3 2026-04-13
ASA9411 Alaska Airlines 2 2026-06-10
ASA787 - 2 2026-07-05
ASA762 - 2 2026-07-04
ASA761 - 2 2026-07-04
ASA758 - 2 2026-07-12
ASA650 - 2 2026-06-18
ASA645 Alaska Airlines 2 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA254 ANC → SEA Jul 26, 19:10 UTCJul 26, 19:45 UTC35m
2026-07-26 ASA577 PDX → SAN Jul 26, 14:55 UTCJul 26, 17:10 UTC2h 15m
2026-07-26 ASA1397 CUN → SAN Jul 26, 01:55 UTCJul 26, 03:35 UTC1h 40m
2026-07-25 ASA56 LAX → PDX Jul 25, 19:15 UTCJul 26, 00:10 UTC4h 55m
2026-07-25 ASA1615 PDX → ANC Jul 25, 14:35 UTCJul 25, 17:50 UTC3h 15m
2026-07-24 ASA301 LIH → SJC Jul 24, 22:20 UTCJul 25, 03:55 UTC5h 35m
2026-07-24 ASA295 LAX → SEA Jul 24, 15:20 UTCJul 24, 20:10 UTC4h 50m
2026-07-24 ASA206 PDX → SFO Jul 24, 12:10 UTCJul 24, 13:10 UTC1h 0m
2026-07-24 ASA206 PDX → SFO Jul 24, 07:57 UTCJul 24, 12:56 UTC4h 59m
2026-07-24 ASA353 ORD → SEA Jul 24, 01:00 UTCJul 24, 01:50 UTC50m
2026-07-23 ASA1633 SJC → PDX Jul 23, 21:40 UTCJul 23, 23:05 UTC1h 25m
2026-07-23 ASA1632 PDX → SJC Jul 23, 18:55 UTCJul 23, 20:30 UTC1h 35m
2026-07-23 ASA349 - Jul 23, 15:10 UTCJul 23, 16:55 UTC1h 45m
2026-07-23 ASA1636 ANC → LAS Jul 23, 08:10 UTCJul 23, 12:50 UTC4h 40m
2026-07-22 ASA45 ANC → BET Jul 22, 03:15 UTCJul 22, 04:05 UTC50m
2026-07-22 ASA45 ANC → BET Jul 22, 03:12 UTCJul 22, 04:14 UTC1h 2m
2026-07-21 ASA1565 PDX → ANC Jul 21, 22:35 UTCJul 22, 01:55 UTC3h 20m
2026-07-21 ASA1565 PDX → ANC Jul 21, 22:32 UTCJul 22, 01:52 UTC3h 20m
2026-07-21 ASA251 GEG → PDX Jul 21, 20:30 UTCJul 21, 21:20 UTC50m
2026-07-21 ASA250 PDX → GEG Jul 21, 17:45 UTCJul 21, 18:30 UTC45m
2026-07-21 ASA250 PDX → GEG Jul 21, 17:50 UTCJul 21, 18:25 UTC35m
2026-07-21 ASA311 SEA → SFO Jul 21, 10:40 UTCJul 21, 16:20 UTC5h 40m
2026-07-20 ASA460 SEA → BOS Jul 20, 23:25 UTCJul 21, 03:45 UTC4h 19m
2026-07-20 ASA275 FAI → SEA Jul 20, 16:05 UTCJul 20, 19:30 UTC3h 25m
2026-07-20 ASA1612 ANC → FAI Jul 20, 05:20 UTCJul 20, 06:00 UTC40m
2026-07-20 ASA225 BUR → PDX Jul 20, 00:40 UTCJul 20, 03:50 UTC3h 10m
2026-07-19 ASA286 BZN → SEA Jul 19, 21:48 UTCJul 19, 23:01 UTC1h 13m
2026-07-19 ASA286 SEA → SEA Jul 19, 19:00 UTCJul 19, 23:15 UTC4h 15m
2026-07-19 ASA512 - Jul 19, 14:45 UTCJul 19, 16:55 UTC2h 10m
2026-07-19 ASA203 SEA → SJC Jul 19, 05:45 UTCJul 19, 06:30 UTC45m
2026-07-19 ASA254 - Jul 19, 00:00 UTCJul 19, 00:15 UTC15m
2026-07-18 ASA254 - Jul 18, 18:50 UTCJul 18, 19:25 UTC35m
2026-07-18 ASA254 SAN → OGG Jul 18, 18:49 UTCJul 19, 00:05 UTC5h 16m
2026-07-18 ASA577 PDX → SAN Jul 18, 14:45 UTCJul 18, 17:00 UTC2h 15m
2026-07-18 ASA1392 - Jul 18, 02:14 UTCJul 18, 04:10 UTC1h 56m
2026-07-17 ASA1447 ORD → SAN Jul 17, 21:00 UTCJul 18, 00:29 UTC3h 30m
2026-07-17 ASA1446 - Jul 17, 14:35 UTCJul 17, 18:50 UTC4h 15m
2026-07-16 ASA573 SJC → SEA Jul 16, 23:15 UTCJul 17, 04:10 UTC4h 55m
2026-07-16 ASA573 SJC → SEA Jul 16, 23:20 UTCJul 17, 04:10 UTC4h 50m
2026-07-16 ASA233 - Jul 16, 16:35 UTCJul 16, 21:25 UTC4h 50m
2026-07-15 ASA534 - Jul 15, 20:15 UTCJul 16, 02:40 UTC6h 25m
2026-07-15 ASA581 - Jul 15, 16:30 UTCJul 15, 18:35 UTC2h 5m
2026-07-14 ASA1538 STL → PDX Jul 14, 23:00 UTCJul 15, 02:30 UTC3h 30m
2026-07-14 ASA1635 PDX → STL Jul 14, 18:15 UTCJul 14, 21:50 UTC3h 35m
2026-07-14 ASA413 - Jul 14, 13:05 UTCJul 14, 16:40 UTC3h 35m
2026-07-14 ASA328 - Jul 14, 08:10 UTCJul 14, 11:35 UTC3h 25m
2026-07-14 ASA309 MCO → SEA Jul 14, 00:35 UTCJul 14, 05:55 UTC5h 20m
2026-07-13 ASA420 SEA → MCO Jul 13, 17:10 UTCJul 13, 22:45 UTC5h 35m
2026-07-13 ASA607 - Jul 13, 13:20 UTCJul 13, 15:20 UTC2h 0m
2026-07-12 ASA1332 - Jul 12, 23:50 UTCJul 13, 04:55 UTC5h 5m

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 N464AS page for operator, model, and routing details .

Mode-S A5A888 frequently asked

What is Mode-S code A5A888?
A5A888 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N464AS.
Where is Mode-S A5A888 registered?
Mode-S code A5A888 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 A5A888 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5A888, octal 51324210, decimal 10,856,584.
What flights does A5A888 operate?
Mode-S A5A888 has broadcast 20 distinct callsigns, including ASA254, ASA9430, ASA9421, ASA577, ASA491.