Apparatus

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sensors Mode-S transponder

AC5F5F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N897AK · BOEING 737 MAX 8 · operated by ALASKA AIRLINES INC.

Hex
AC5F5F
Octal
53057537
Decimal
11,296,607
Country
US
Tail
N897AK
Type
B38M
No current signal · last broadcast Jul 26, 19:50 UTC
Flights observed
446
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:50 UTC

Last known position

Most recent position reported by Mode-S AC5F5F.

Country allocation

The ICAO 24-bit address AC5F5F 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
ASA1354 Alaska Airlines 11 2026-07-20
ASA1353 Alaska Airlines 11 2026-07-20
ASA1452 - 10 2026-07-17
ASA737 Alaska Airlines 7 2026-05-26
ASA552 Alaska Airlines 6 2026-07-26
ASA1430 - 6 2026-07-17
ASA1417 - 6 2026-07-16
ASA9 Alaska Airlines 5 2026-06-08
ASA740 Alaska Airlines 5 2026-06-20
ASA67 - 5 2026-07-09
ASA327 - 5 2026-06-21
ASA234 - 5 2026-06-12
ASA1408 Alaska Airlines 5 2026-07-26
ASA755 - 4 2026-06-20
ASA697 - 4 2026-06-29
ASA696 Alaska Airlines 4 2026-07-19
ASA400 Alaska Airlines 4 2026-05-18
ASA4 Alaska Airlines 4 2026-06-08
ASA347 - 4 2026-07-18
ASA265 - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA552 LAX → SEA Jul 26, 14:15 UTCJul 26, 19:50 UTC5h 35m
2026-07-26 ASA1408 SJC → GDL Jul 26, 02:45 UTCJul 26, 05:00 UTC2h 15m
2026-07-26 ASA1408 SJC → GDL Jul 26, 02:42 UTCJul 26, 04:54 UTC2h 12m
2026-07-25 ASA760 SNA → SEA Jul 25, 22:00 UTCJul 26, 00:10 UTC2h 10m
2026-07-25 ASA1357 PVR → SFO Jul 25, 18:25 UTCJul 25, 20:55 UTC2h 30m
2026-07-25 ASA210 SEA → SFO Jul 25, 13:40 UTCJul 25, 16:50 UTC3h 10m
2026-07-25 ASA1521 SAN → ORD Jul 25, 05:10 UTCJul 25, 08:35 UTC3h 25m
2026-07-25 ASA253 SBA → SEA Jul 25, 02:20 UTCJul 25, 03:05 UTC45m
2026-07-24 ASA253 SBA → SEA Jul 24, 22:05 UTCJul 24, 22:25 UTC20m
2026-07-24 ASA252 PDX → KOA Jul 24, 15:20 UTCJul 24, 20:50 UTC5h 30m
2026-07-24 ASA252 PDX → KOA Jul 24, 15:20 UTCJul 24, 20:43 UTC5h 23m
2026-07-24 ASA662 PHX → PDX Jul 24, 02:20 UTCJul 24, 04:30 UTC2h 10m
2026-07-23 ASA700 SEA → PHX Jul 23, 22:15 UTCJul 24, 00:55 UTC2h 40m
2026-07-23 ASA656 LAX → SFO Jul 23, 19:05 UTCJul 23, 20:35 UTC1h 30m
2026-07-23 ASA725 LAS → PDX Jul 23, 15:45 UTCJul 23, 17:35 UTC1h 50m
2026-07-23 ASA54 ANC → LAS Jul 23, 10:00 UTCJul 23, 12:50 UTC2h 50m
2026-07-23 ASA667 SEA → RDM Jul 23, 04:22 UTCJul 23, 07:33 UTC3h 11m
2026-07-23 ASA667 SEA → RDM Jul 23, 04:25 UTCJul 23, 07:40 UTC3h 15m
2026-07-22 ASA3 DCA → SEA Jul 22, 21:25 UTCJul 23, 02:50 UTC5h 25m
2026-07-22 ASA10 PDX → DCA Jul 22, 15:10 UTCJul 22, 19:25 UTC4h 15m
2026-07-22 ASA589 DAL → SEA Jul 22, 02:05 UTCJul 22, 03:55 UTC1h 50m
2026-07-21 ASA264 PDX → SJC Jul 21, 22:40 UTCJul 22, 00:50 UTC2h 10m
2026-07-21 ASA235 GDL → SJC Jul 21, 20:13 UTCJul 21, 21:23 UTC1h 10m
2026-07-21 ASA235 GDL → SJC Jul 21, 20:10 UTCJul 21, 21:25 UTC1h 15m
2026-07-21 ASA528 SFO → LAS Jul 21, 16:54 UTCJul 21, 18:34 UTC1h 40m
2026-07-21 ASA528 SFO → LAS Jul 21, 16:55 UTCJul 21, 18:50 UTC1h 55m
2026-07-21 ASA323 - Jul 21, 13:20 UTCJul 21, 14:35 UTC1h 15m
2026-07-21 ASA736 SEA → BOS Jul 21, 04:28 UTCJul 21, 05:36 UTC1h 8m
2026-07-21 ASA736 SEA → BOS Jul 21, 04:20 UTCJul 21, 05:45 UTC1h 25m
2026-07-21 ASA758 SFO → SEA Jul 21, 01:25 UTCJul 21, 02:55 UTC1h 30m
2026-07-21 ASA758 SFO → SEA Jul 21, 01:05 UTCJul 21, 02:50 UTC1h 45m
2026-07-20 ASA561 SEA → AUS Jul 20, 21:00 UTCJul 20, 22:00 UTC1h 0m
2026-07-20 ASA560 SEA → DFW Jul 20, 18:20 UTCJul 20, 19:25 UTC1h 5m
2026-07-20 ASA687 - Jul 20, 16:10 UTCJul 20, 17:05 UTC55m
2026-07-20 ASA1354 GUA → LAX Jul 20, 08:50 UTCJul 20, 12:35 UTC3h 45m
2026-07-20 ASA1354 GUA → LAX Jul 20, 08:00 UTCJul 20, 08:10 UTC10m
2026-07-20 ASA1353 LAX → GUA Jul 20, 05:45 UTCJul 20, 05:55 UTC10m
2026-07-20 ASA1353 LAX → GUA Jul 20, 01:30 UTCJul 20, 05:10 UTC3h 40m
2026-07-19 ASA696 PDX → PHX Jul 19, 21:15 UTCJul 19, 23:35 UTC2h 20m
2026-07-19 ASA696 PDX → PHX Jul 19, 21:13 UTCJul 19, 23:24 UTC2h 11m
2026-07-19 ASA338 BOS → SEA Jul 19, 13:30 UTCJul 19, 19:04 UTC5h 34m
2026-07-19 ASA338 BOS → SEA Jul 19, 13:30 UTCJul 19, 19:20 UTC5h 50m
2026-07-19 ASA1501 SEA → OGG Jul 19, 05:00 UTCJul 19, 11:20 UTC6h 20m
2026-07-19 ASA1501 SEA → OGG Jul 19, 05:00 UTCJul 19, 11:16 UTC6h 16m
2026-07-18 ASA99 SEA → ANC Jul 18, 23:30 UTCJul 19, 02:40 UTC3h 10m
2026-07-18 ASA654 - Jul 18, 19:25 UTCJul 18, 21:30 UTC2h 5m
2026-07-18 ASA654 ONT → SEA Jul 18, 19:29 UTCJul 18, 21:15 UTC1h 46m
2026-07-18 ASA1364 SEA → ONT Jul 18, 16:00 UTCJul 18, 18:15 UTC2h 15m
2026-07-18 ASA347 BUR → SEA Jul 18, 04:10 UTCJul 18, 06:05 UTC1h 55m
2026-07-17 ASA1452 HNL → BUR Jul 17, 21:28 UTCJul 18, 01:55 UTC4h 27m

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 N897AK page for operator, model, and routing details .

Mode-S AC5F5F frequently asked

What is Mode-S code AC5F5F?
AC5F5F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N897AK.
Where is Mode-S AC5F5F registered?
Mode-S code AC5F5F 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 AC5F5F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5F5F, octal 53057537, decimal 11,296,607.
What flights does AC5F5F operate?
Mode-S AC5F5F has broadcast 20 distinct callsigns, including ASA1354, ASA1353, ASA1452, ASA737, ASA552.