Apparatus

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sensors Mode-S transponder

ACF0D8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N933AK · operated by ALASKA AIRLINES INC

Hex
ACF0D8
Octal
53170330
Decimal
11,333,848
Country
US
Tail
N933AK
Type
B39M
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
447
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S ACF0D8.

Country allocation

The ICAO 24-bit address ACF0D8 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
ASA698 Alaska Airlines 5 2026-06-06
ASA616 Alaska Airlines 5 2026-07-24
ASA535 - 5 2026-07-13
ASA50 Alaska Airlines 5 2026-06-13
ASA483 Alaska Airlines 5 2026-04-27
ASA321 Alaska Airlines 5 2026-06-13
ASA246 Alaska Airlines 5 2026-05-19
ASA1431 - 5 2026-07-16
ASA1352 Alaska Airlines 5 2026-07-24
ASA799 - 4 2026-04-13
ASA696 Alaska Airlines 4 2026-06-06
ASA67 - 4 2026-06-30
ASA477 Alaska Airlines 4 2026-05-30
ASA456 Alaska Airlines 4 2026-07-18
ASA355 Alaska Airlines 4 2026-04-16
ASA275 - 4 2026-07-15
ASA253 Alaska Airlines 4 2026-05-09
ASA1521 - 4 2026-07-15
ASA1487 Alaska Airlines 4 2026-06-06
ASA1411 Alaska Airlines 4 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1416 SJC → GDL Jul 26, 15:25 UTCJul 26, 20:45 UTC5h 20m
2026-07-26 ASA1411 PVR → SEA Jul 26, 02:15 UTCJul 26, 03:10 UTC55m
2026-07-25 ASA1411 PVR → SEA Jul 25, 22:45 UTCJul 25, 23:00 UTC15m
2026-07-25 ASA768 SEA → LAS Jul 25, 16:05 UTCJul 25, 21:20 UTC5h 15m
2026-07-25 ASA1351 SJC → SEA Jul 25, 07:15 UTCJul 25, 12:40 UTC5h 25m
2026-07-24 ASA1352 SFO → BOS Jul 24, 23:55 UTCJul 25, 05:25 UTC5h 30m
2026-07-24 ASA616 TPA → SFO Jul 24, 07:25 UTCJul 24, 20:10 UTC12h 45m
2026-07-24 ASA496 SAN → PDX Jul 24, 02:50 UTCJul 24, 05:05 UTC2h 15m
2026-07-23 ASA537 BOS → SEA Jul 23, 22:35 UTCJul 24, 00:35 UTC2h 0m
2026-07-23 ASA529 LAS → SFO Jul 23, 18:50 UTCJul 23, 21:05 UTC2h 15m
2026-07-23 ASA1337 LAX → PVR Jul 23, 00:10 UTCJul 23, 05:40 UTC5h 30m
2026-07-22 ASA219 SEA → BNH Jul 22, 17:30 UTCJul 22, 22:00 UTC4h 30m
2026-07-22 ASA554 PDX → ORD Jul 22, 12:15 UTCJul 22, 15:25 UTC3h 10m
2026-07-22 ASA554 PDX → ORD Jul 22, 12:10 UTCJul 22, 15:14 UTC3h 4m
2026-07-22 ASA553 IAD → SFO Jul 22, 01:55 UTCJul 22, 05:05 UTC3h 10m
2026-07-21 ASA439 SEA → SFO Jul 21, 20:05 UTCJul 21, 23:55 UTC3h 50m
2026-07-21 ASA1420 - Jul 21, 14:30 UTCJul 21, 18:30 UTC4h 0m
2026-07-20 ASA558 SEA → SAN Jul 20, 21:15 UTCJul 21, 12:10 UTC14h 55m
2026-07-20 ASA587 ORD → SEA Jul 20, 14:40 UTCJul 20, 18:45 UTC4h 5m
2026-07-20 ASA1724 ANC → ORD Jul 20, 05:45 UTCJul 20, 11:30 UTC5h 45m
2026-07-20 ASA1724 ANC → ORD Jul 20, 05:43 UTCJul 20, 11:10 UTC5h 27m
2026-07-20 ASA352 ANC → SEA Jul 20, 02:10 UTCJul 20, 02:55 UTC45m
2026-07-19 ASA351 LAX → SEA Jul 19, 23:45 UTCJul 20, 00:35 UTC50m
2026-07-19 ASA1437 SFO → LAX Jul 19, 19:55 UTCJul 19, 20:40 UTC45m
2026-07-19 ASA1437 SFO → LAX Jul 19, 17:30 UTCJul 19, 18:25 UTC55m
2026-07-19 ASA771 ORD → SFO Jul 19, 04:25 UTCJul 19, 07:35 UTC3h 10m
2026-07-19 ASA771 ORD → SFO Jul 19, 04:23 UTCJul 19, 07:34 UTC3h 11m
2026-07-18 ASA456 SFO → ORD Jul 18, 23:40 UTCJul 19, 01:30 UTC1h 50m
2026-07-18 ASA209 LAX → SFO Jul 18, 19:55 UTCJul 18, 22:00 UTC2h 5m
2026-07-18 ASA209 LAX → SFO Jul 18, 19:53 UTCJul 18, 22:07 UTC2h 14m
2026-07-18 ASA1327 - Jul 18, 16:40 UTCJul 18, 18:15 UTC1h 35m
2026-07-18 ASA1327 SFO → SEA Jul 18, 16:40 UTCJul 18, 18:07 UTC1h 27m
2026-07-17 ASA59 SEA → ANC Jul 17, 23:35 UTCJul 18, 05:05 UTC5h 31m
2026-07-17 ASA34 SEA → JFK Jul 17, 16:44 UTCJul 17, 21:34 UTC4h 50m
2026-07-17 ASA491 OAK → SEA Jul 17, 13:35 UTCJul 17, 15:05 UTC1h 30m
2026-07-17 ASA706 SEA → OAK Jul 17, 02:25 UTCJul 17, 04:14 UTC1h 50m
2026-07-16 ASA446 - Jul 16, 21:45 UTCJul 16, 23:49 UTC2h 5m
2026-07-16 ASA446 JNU → SEA Jul 16, 21:54 UTCJul 16, 23:36 UTC1h 42m
2026-07-16 ASA208 - Jul 16, 18:40 UTCJul 16, 20:35 UTC1h 55m
2026-07-16 ASA625 - Jul 16, 11:30 UTCJul 16, 15:25 UTC3h 55m
2026-07-16 ASA624 SEA → IND Jul 16, 06:20 UTCJul 16, 10:00 UTC3h 40m
2026-07-16 ASA1431 - Jul 16, 02:25 UTCJul 16, 04:35 UTC2h 10m
2026-07-15 ASA1432 SEA → SAN Jul 15, 22:05 UTCJul 16, 00:40 UTC2h 35m
2026-07-15 ASA275 SEA → SEA Jul 15, 19:15 UTCJul 15, 19:20 UTC5m
2026-07-15 ASA275 - Jul 15, 16:05 UTCJul 15, 19:20 UTC3h 15m
2026-07-15 ASA275 FAI → SEA Jul 15, 16:01 UTCJul 15, 19:00 UTC2h 59m
2026-07-15 ASA1521 PDX → FAI Jul 15, 05:15 UTCJul 15, 08:35 UTC3h 20m
2026-07-15 ASA1521 PDX → FAI Jul 15, 05:14 UTCJul 15, 08:38 UTC3h 24m
2026-07-14 ASA646 DFW → PDX Jul 14, 23:25 UTCJul 15, 02:45 UTC3h 20m
2026-07-14 ASA392 PDX → DFW Jul 14, 18:25 UTCJul 14, 21:50 UTC3h 25m

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 N933AK page for operator, model, and routing details .

Mode-S ACF0D8 frequently asked

What is Mode-S code ACF0D8?
ACF0D8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N933AK.
Where is Mode-S ACF0D8 registered?
Mode-S code ACF0D8 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 ACF0D8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF0D8, octal 53170330, decimal 11,333,848.
What flights does ACF0D8 operate?
Mode-S ACF0D8 has broadcast 20 distinct callsigns, including ASA698, ASA616, ASA535, ASA50, ASA483.