Apparatus

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sensors Mode-S transponder

ACDFA3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N929AK · BOEING 737 MAX 9 · operated by BANK OF UTAH TRUSTEE

Hex
ACDFA3
Octal
53157643
Decimal
11,329,443
Country
US
Tail
N929AK
Type
B39M
No current signal · last broadcast 3h ago
Flights observed
377
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S ACDFA3.

Country allocation

The ICAO 24-bit address ACDFA3 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
ASA266 - 7 2026-07-03
ASA501 Alaska Airlines 6 2026-06-13
ASA338 Alaska Airlines 6 2026-07-06
ASA305 Alaska Airlines 6 2026-06-27
ASA201 Alaska Airlines 6 2026-06-05
ASA94 Alaska Airlines 5 2026-04-25
ASA610 Alaska Airlines 5 2026-05-20
ASA502 Alaska Airlines 5 2026-05-19
ASA404 - 5 2026-06-19
ASA785 - 4 2026-07-09
ASA500 - 4 2026-07-03
ASA42 Alaska Airlines 4 2026-05-02
ASA249 - 4 2026-07-07
ASA95 Alaska Airlines 3 2026-05-17
ASA707 Alaska Airlines 3 2026-05-10
ASA703 Alaska Airlines 3 2026-05-30
ASA688 Alaska Airlines 3 2026-05-17
ASA634 - 3 2026-06-30
ASA612 - 3 2026-07-09
ASA536 - 3 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA629 LAS → SEA Jul 14, 00:20 UTCJul 14, 02:20 UTC2h 0m
2026-07-12 ASA738 SEA → LAS Jul 12, 19:01 UTCJul 12, 21:20 UTC2h 20m
2026-07-12 ASA299 EWR → SEA Jul 12, 11:45 UTCJul 12, 16:55 UTC5h 10m
2026-07-12 ASA1631 PDX → EWR Jul 12, 04:55 UTCJul 12, 09:30 UTC4h 35m
2026-07-11 ASA1421 - Jul 11, 23:35 UTCJul 12, 03:25 UTC3h 50m
2026-07-11 ASA438 - Jul 11, 18:20 UTCJul 11, 22:05 UTC3h 45m
2026-07-11 ASA403 SMF → SEA Jul 11, 03:40 UTCJul 11, 05:01 UTC1h 20m
2026-07-11 ASA1622 PDX → SMF Jul 11, 01:10 UTCJul 11, 02:20 UTC1h 10m
2026-07-10 ASA742 PHX → PDX Jul 10, 21:20 UTCJul 10, 23:35 UTC2h 15m
2026-07-10 ASA593 SEA → PHX Jul 10, 17:45 UTCJul 10, 20:00 UTC2h 15m
2026-07-10 ASA519 - Jul 10, 12:20 UTCJul 10, 16:00 UTC3h 40m
2026-07-10 ASA520 - Jul 10, 06:15 UTCJul 10, 09:45 UTC3h 30m
2026-07-10 ASA520 SEA → SAT Jul 10, 06:15 UTCJul 10, 09:45 UTC3h 30m
2026-07-10 ASA1681 LAS → SEA Jul 10, 01:55 UTCJul 10, 04:05 UTC2h 10m
2026-07-09 ASA600 SEA → LAS Jul 9, 22:30 UTCJul 10, 00:25 UTC1h 55m
2026-07-09 ASA785 LAS → SEA Jul 9, 19:00 UTCJul 9, 20:36 UTC1h 36m
2026-07-09 ASA785 LAS → SEA Jul 9, 18:45 UTCJul 9, 20:55 UTC2h 10m
2026-07-09 ASA612 SEA → LAS Jul 9, 15:05 UTCJul 9, 16:55 UTC1h 50m
2026-07-09 ASA259 KOA → SEA Jul 9, 07:39 UTCJul 9, 13:02 UTC5h 23m
2026-07-09 ASA259 - Jul 9, 07:30 UTCJul 9, 07:50 UTC20m
2026-07-09 ASA238 - Jul 9, 04:40 UTCJul 9, 05:00 UTC20m
2026-07-08 ASA238 - Jul 8, 23:50 UTCJul 9, 00:40 UTC50m
2026-07-08 ASA475 - Jul 8, 18:35 UTCJul 8, 20:55 UTC2h 20m
2026-07-08 ASA1471 - Jul 8, 14:35 UTCJul 8, 16:55 UTC2h 20m
2026-07-08 ASA244 - Jul 8, 06:05 UTCJul 8, 06:55 UTC50m
2026-07-08 ASA244 OGG → SEA Jul 8, 01:26 UTCJul 8, 06:52 UTC5h 26m
2026-07-07 ASA254 - Jul 7, 18:35 UTCJul 7, 19:30 UTC55m
2026-07-07 ASA708 MCO → SAN Jul 7, 12:00 UTCJul 7, 16:20 UTC4h 20m
2026-07-07 ASA394 SEA → MCO Jul 7, 04:55 UTCJul 7, 09:55 UTC5h 0m
2026-07-07 ASA249 - Jul 7, 01:10 UTCJul 7, 03:30 UTC2h 20m
2026-07-06 ASA242 SEA → DEN Jul 6, 20:50 UTCJul 6, 23:10 UTC2h 20m
2026-07-06 ASA338 SEA → SJC Jul 6, 13:30 UTCJul 6, 18:53 UTC5h 23m
2026-07-06 ASA338 SEA → SJC Jul 6, 13:30 UTCJul 6, 19:00 UTC5h 30m
2026-07-06 ASA536 SEA → BOS Jul 6, 06:30 UTCJul 6, 11:15 UTC4h 45m
2026-07-06 ASA544 PDX → SFO Jul 6, 01:30 UTCJul 6, 04:35 UTC3h 5m
2026-07-06 ASA544 PDX → SFO Jul 6, 01:28 UTCJul 6, 04:23 UTC2h 55m
2026-07-05 ASA1347 FAI → ANC Jul 5, 22:35 UTCJul 5, 23:15 UTC40m
2026-07-05 ASA1336 ANC → FAI Jul 5, 20:35 UTCJul 5, 21:20 UTC45m
2026-07-05 ASA79 SEA → ANC Jul 5, 15:10 UTCJul 5, 18:25 UTC3h 15m
2026-07-04 ASA676 LAS → SEA Jul 4, 19:25 UTCJul 4, 21:30 UTC2h 5m
2026-07-04 ASA1628 PDX → LAS Jul 4, 16:10 UTCJul 4, 17:55 UTC1h 45m
2026-07-04 ASA1520 FAI → PDX Jul 4, 08:55 UTCJul 4, 12:15 UTC3h 20m
2026-07-04 ASA1880 SEA → FAI Jul 4, 04:20 UTCJul 4, 07:35 UTC3h 15m
2026-07-03 ASA500 - Jul 3, 22:35 UTCJul 4, 02:55 UTC4h 20m
2026-07-03 ASA500 SEA → IND Jul 3, 16:30 UTCJul 3, 20:20 UTC3h 50m
2026-07-03 ASA643 DEN → SEA Jul 3, 12:15 UTCJul 3, 14:40 UTC2h 25m
2026-07-03 ASA1619 SAN → DEN Jul 3, 03:35 UTCJul 3, 05:20 UTC1h 45m
2026-07-03 ASA266 - Jul 3, 00:55 UTCJul 3, 01:35 UTC40m
2026-07-02 ASA266 - Jul 2, 20:45 UTCJul 2, 20:55 UTC10m
2026-07-02 ASA693 - Jul 2, 18:50 UTCJul 2, 19:05 UTC15m

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 N929AK page for operator, model, and routing details .

Mode-S ACDFA3 frequently asked

What is Mode-S code ACDFA3?
ACDFA3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N929AK.
Where is Mode-S ACDFA3 registered?
Mode-S code ACDFA3 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 ACDFA3 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACDFA3, octal 53157643, decimal 11,329,443.
What flights does ACDFA3 operate?
Mode-S ACDFA3 has broadcast 20 distinct callsigns, including ASA266, ASA501, ASA338, ASA305, ASA201.