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 Jul 26, 22:40 UTC
Flights observed
437
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

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
ASA338 Alaska Airlines 8 2026-07-23
ASA501 - 7 2026-07-19
ASA266 - 7 2026-07-03
ASA785 - 6 2026-07-14
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
ASA612 - 4 2026-07-14
ASA536 Alaska Airlines 4 2026-07-23
ASA500 - 4 2026-07-03
ASA42 Alaska Airlines 4 2026-05-02
ASA249 - 4 2026-07-07
ASA205 Alaska Airlines 4 2026-07-18
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA477 LAX → SEA Jul 26, 18:20 UTCJul 26, 22:40 UTC4h 20m
2026-07-26 ASA440 MIA → PDX Jul 26, 16:35 UTCJul 26, 16:40 UTC5m
2026-07-26 ASA440 MIA → PDX Jul 26, 12:45 UTCJul 26, 16:40 UTC3h 55m
2026-07-26 ASA440 MIA → PDX Jul 26, 12:53 UTCJul 26, 16:16 UTC3h 23m
2026-07-26 ASA307 LAX → SFO Jul 26, 01:35 UTCJul 26, 04:40 UTC3h 5m
2026-07-25 ASA507 SNA → SEA Jul 25, 20:05 UTCJul 26, 00:00 UTC3h 55m
2026-07-25 ASA507 SNA → SEA Jul 25, 15:25 UTCJul 25, 18:35 UTC3h 10m
2026-07-25 ASA90 FAI → ANC Jul 25, 06:05 UTCJul 25, 07:10 UTC1h 5m
2026-07-25 ASA90 FAI → ANC Jul 25, 02:05 UTCJul 25, 02:20 UTC15m
2026-07-25 ASA626 SFO → SEA Jul 25, 00:30 UTCJul 25, 00:40 UTC10m
2026-07-24 ASA626 SFO → SEA Jul 24, 19:15 UTCJul 24, 20:05 UTC50m
2026-07-24 ASA626 SFO → SEA Jul 24, 19:13 UTCJul 25, 00:39 UTC5h 26m
2026-07-24 ASA670 PDX → LAS Jul 24, 11:45 UTCJul 24, 17:05 UTC5h 20m
2026-07-24 ASA677 LAS → SEA Jul 24, 05:05 UTCJul 24, 09:25 UTC4h 20m
2026-07-24 ASA575 DFW → SEA Jul 24, 00:55 UTCJul 24, 03:00 UTC2h 5m
2026-07-23 ASA571 MCO → SAN Jul 23, 21:25 UTCJul 23, 23:35 UTC2h 10m
2026-07-23 ASA571 MCO → SAN Jul 23, 21:23 UTCJul 23, 23:39 UTC2h 16m
2026-07-23 ASA338 SEA → SJC Jul 23, 13:55 UTCJul 23, 19:46 UTC5h 51m
2026-07-23 ASA338 SEA → SJC Jul 23, 14:15 UTCJul 23, 19:50 UTC5h 35m
2026-07-23 ASA536 SEA → BOS Jul 23, 06:40 UTCJul 23, 11:15 UTC4h 35m
2026-07-23 ASA1368 SFO → PVR Jul 23, 02:30 UTCJul 23, 04:30 UTC2h 0m
2026-07-23 ASA1523 LAX → SJO Jul 23, 00:05 UTCJul 23, 01:10 UTC1h 5m
2026-07-22 ASA41 MCO → SFO Jul 22, 17:05 UTCJul 22, 22:45 UTC5h 40m
2026-07-22 ASA9340 LTO → SFO Jul 22, 13:28 UTCJul 22, 15:11 UTC1h 43m
2026-07-22 ASA9340 LTO → SFO Jul 22, 13:20 UTCJul 22, 15:25 UTC2h 5m
2026-07-21 ASA26 SEA → ORD Jul 21, 19:20 UTCJul 21, 20:20 UTC1h 0m
2026-07-21 ASA26 SEA → ORD Jul 21, 14:40 UTCJul 21, 20:20 UTC5h 40m
2026-07-21 ASA26 SEA → ORD Jul 21, 14:35 UTCJul 21, 19:04 UTC4h 29m
2026-07-21 ASA282 SAN → EWR Jul 21, 03:55 UTCJul 21, 05:25 UTC1h 30m
2026-07-21 ASA393 JFK → SAN Jul 21, 00:40 UTCJul 21, 02:20 UTC1h 40m
2026-07-20 ASA1305 LAX → SEA Jul 20, 20:15 UTCJul 20, 22:10 UTC1h 55m
2026-07-20 ASA1602 SFO → LAX Jul 20, 17:50 UTCJul 20, 18:50 UTC1h 0m
2026-07-20 ASA1602 SFO → LAX Jul 20, 18:05 UTCJul 20, 18:36 UTC31m
2026-07-20 ASA526 PDX → SFO Jul 20, 15:05 UTCJul 20, 16:35 UTC1h 30m
2026-07-20 ASA526 PDX → SFO Jul 20, 15:04 UTCJul 20, 16:30 UTC1h 26m
2026-07-20 ASA609 LAX → PDX Jul 20, 09:40 UTCJul 20, 13:00 UTC3h 20m
2026-07-20 ASA771 ORD → SFO Jul 20, 04:40 UTCJul 20, 07:50 UTC3h 10m
2026-07-20 ASA771 ORD → SFO Jul 20, 04:43 UTCJul 20, 07:36 UTC2h 53m
2026-07-20 ASA430 PDX → SEA Jul 20, 00:50 UTCJul 20, 01:21 UTC31m
2026-07-19 ASA413 ORD → PDX Jul 19, 18:35 UTCJul 19, 22:35 UTC4h 0m
2026-07-19 ASA328 - Jul 19, 10:25 UTCJul 19, 13:40 UTC3h 15m
2026-07-19 ASA501 - Jul 19, 01:20 UTCJul 19, 04:35 UTC3h 15m
2026-07-18 ASA497 - Jul 18, 21:15 UTCJul 19, 00:05 UTC2h 50m
2026-07-18 ASA205 SAN → SEA Jul 18, 03:50 UTCJul 18, 04:50 UTC1h 0m
2026-07-17 ASA205 SAN → SEA Jul 17, 23:25 UTCJul 17, 23:45 UTC20m
2026-07-17 ASA205 SAN → SEA Jul 17, 23:24 UTCJul 18, 04:41 UTC5h 17m
2026-07-17 ASA222 - Jul 17, 21:39 UTCJul 17, 21:50 UTC10m
2026-07-17 ASA222 - Jul 17, 16:29 UTCJul 17, 17:09 UTC40m
2026-07-17 ASA203 - Jul 17, 02:39 UTCJul 17, 03:30 UTC50m
2026-07-16 ASA245 - Jul 16, 15:49 UTCJul 16, 16:40 UTC50m

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 Jul 26, 22:40 UTC.
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 ASA338, ASA501, ASA266, ASA785, ASA305.