Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9D9F2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N734AL · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
A9D9F2
Octal
52354762
Decimal
11,131,378
Country
US
Tail
N734AL
Type
B39M
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
481
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A9D9F2.

Country allocation

The ICAO 24-bit address A9D9F2 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
ASA412 Alaska Airlines 10 2026-07-19
ASA306 Alaska Airlines 10 2026-05-18
ASA326 Alaska Airlines 7 2026-04-15
ASA245 Alaska Airlines 6 2026-07-03
ASA205 - 6 2026-07-05
ASA762 - 5 2026-07-11
ASA625 Alaska Airlines 5 2026-05-19
ASA560 Alaska Airlines 5 2026-06-06
ASA50 - 5 2026-06-18
ASA49 - 5 2026-06-18
ASA307 - 5 2026-07-15
ASA1403 Alaska Airlines 5 2026-05-08
ASA761 - 4 2026-07-11
ASA744 - 4 2026-07-17
ASA738 Alaska Airlines 4 2026-04-28
ASA737 - 4 2026-07-15
ASA727 Alaska Airlines 4 2026-05-19
ASA62 Alaska Airlines 4 2026-06-18
ASA517 - 4 2026-06-16
ASA323 - 4 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA23 PHL → SEA Jul 26, 17:10 UTCJul 26, 22:30 UTC5h 20m
2026-07-26 ASA16 SEA → JFK Jul 26, 02:10 UTCJul 26, 02:15 UTC5m
2026-07-25 ASA16 SEA → JFK Jul 25, 21:41 UTCJul 26, 01:55 UTC4h 14m
2026-07-25 ASA16 SEA → JFK Jul 25, 21:45 UTCJul 26, 02:15 UTC4h 30m
2026-07-25 ASA1468 SEA → LAX Jul 25, 17:35 UTCJul 25, 18:55 UTC1h 20m
2026-07-25 ASA682 SEA → DEN Jul 25, 14:40 UTCJul 25, 16:05 UTC1h 25m
2026-07-25 ASA682 SEA → DEN Jul 25, 14:35 UTCJul 25, 16:06 UTC1h 31m
2026-07-25 ASA614 SEA → SLC Jul 25, 03:20 UTCJul 25, 05:20 UTC2h 0m
2026-07-24 ASA437 - Jul 24, 18:35 UTCJul 25, 00:55 UTC6h 20m
2026-07-24 ASA1611 GEG → LAX Jul 24, 13:30 UTCJul 24, 15:45 UTC2h 15m
2026-07-24 ASA1356 SFO → LTO Jul 24, 05:05 UTCJul 24, 05:50 UTC45m
2026-07-23 ASA301 LIH → SJC Jul 23, 22:21 UTCJul 24, 03:17 UTC4h 56m
2026-07-23 ASA301 LIH → SJC Jul 23, 21:50 UTCJul 24, 03:10 UTC5h 20m
2026-07-23 ASA295 LAX → SEA Jul 23, 15:20 UTCJul 23, 20:25 UTC5h 5m
2026-07-23 ASA1436 SEA → LAX Jul 23, 04:45 UTCJul 23, 06:15 UTC1h 30m
2026-07-23 ASA1436 SEA → LAX Jul 23, 04:41 UTCJul 23, 06:07 UTC1h 26m
2026-07-22 ASA1411 PVR → SEA Jul 22, 23:05 UTCJul 22, 23:25 UTC20m
2026-07-22 ASA1411 PVR → SEA Jul 22, 23:03 UTCJul 23, 03:26 UTC4h 23m
2026-07-22 ASA768 SEA → LAS Jul 22, 15:55 UTCJul 22, 21:25 UTC5h 30m
2026-07-22 ASA1352 SFO → BOS Jul 22, 00:40 UTCJul 22, 12:30 UTC11h 50m
2026-07-21 ASA502 SEA → AUS Jul 21, 20:25 UTCJul 21, 22:55 UTC2h 30m
2026-07-21 ASA1327 SFO → SEA Jul 21, 16:50 UTCJul 21, 18:15 UTC1h 25m
2026-07-21 ASA1327 SFO → SEA Jul 21, 16:57 UTCJul 21, 18:06 UTC1h 9m
2026-07-20 ASA1561 ANC → SFO Jul 20, 23:00 UTCJul 21, 03:50 UTC4h 50m
2026-07-20 ASA1810 FAI → ANC Jul 20, 18:15 UTCJul 20, 21:30 UTC3h 15m
2026-07-20 ASA283 EWR → PDX Jul 20, 11:30 UTCJul 20, 16:00 UTC4h 30m
2026-07-20 ASA280 EWR → SEA Jul 20, 05:45 UTCJul 20, 09:20 UTC3h 35m
2026-07-19 ASA412 SEA → PIT Jul 19, 23:00 UTCJul 20, 03:55 UTC4h 55m
2026-07-19 ASA412 SEA → PIT Jul 19, 16:50 UTCJul 19, 20:40 UTC3h 50m
2026-07-19 ASA473 STL → SEA Jul 19, 11:10 UTCJul 19, 14:55 UTC3h 45m
2026-07-19 ASA615 SEA → STL Jul 19, 01:50 UTCJul 19, 05:10 UTC3h 20m
2026-07-18 ASA1464 SEA → LAX Jul 18, 22:50 UTCJul 19, 00:20 UTC1h 30m
2026-07-18 ASA1328 SEA → SFO Jul 18, 19:50 UTCJul 18, 21:35 UTC1h 45m
2026-07-18 ASA1328 SEA → SFO Jul 18, 19:49 UTCJul 18, 21:31 UTC1h 42m
2026-07-18 ASA459 BOS → SEA Jul 18, 11:30 UTCJul 18, 17:30 UTC6h 0m
2026-07-18 ASA255 - Jul 18, 04:10 UTCJul 18, 09:15 UTC5h 5m
2026-07-17 ASA389 BOS → SAN Jul 17, 21:14 UTCJul 18, 02:37 UTC5h 23m
2026-07-17 ASA389 BOS → SAN Jul 17, 21:15 UTCJul 18, 02:40 UTC5h 25m
2026-07-17 ASA358 PDX → BOS Jul 17, 14:15 UTCJul 17, 19:00 UTC4h 45m
2026-07-17 ASA650 - Jul 17, 06:25 UTCJul 17, 08:35 UTC2h 10m
2026-07-17 ASA744 SEA → PHX Jul 17, 01:29 UTCJul 17, 04:20 UTC2h 50m
2026-07-16 ASA384 SEA → BOS Jul 16, 22:00 UTCJul 16, 23:40 UTC1h 40m
2026-07-16 ASA383 - Jul 16, 18:34 UTCJul 16, 20:19 UTC1h 45m
2026-07-16 ASA344 DTW → SEA Jul 16, 11:30 UTCJul 16, 15:45 UTC4h 15m
2026-07-16 ASA343 SEA → DTW Jul 16, 05:40 UTCJul 16, 09:15 UTC3h 35m
2026-07-15 ASA737 IAD → SEA Jul 15, 22:40 UTCJul 16, 03:30 UTC4h 50m
2026-07-15 ASA737 SEA → IAD Jul 15, 16:45 UTCJul 15, 21:10 UTC4h 25m
2026-07-15 ASA440 - Jul 15, 11:10 UTCJul 15, 14:50 UTC3h 40m
2026-07-15 ASA307 SEA → MKE Jul 15, 01:45 UTCJul 15, 05:00 UTC3h 15m
2026-07-15 ASA307 SEA → MKE Jul 15, 01:41 UTCJul 15, 04:58 UTC3h 17m

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 N734AL page for operator, model, and routing details .

Mode-S A9D9F2 frequently asked

What is Mode-S code A9D9F2?
A9D9F2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N734AL.
Where is Mode-S A9D9F2 registered?
Mode-S code A9D9F2 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 A9D9F2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D9F2, octal 52354762, decimal 11,131,378.
What flights does A9D9F2 operate?
Mode-S A9D9F2 has broadcast 20 distinct callsigns, including ASA412, ASA306, ASA326, ASA245, ASA205.