Apparatus

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sensors Mode-S transponder

A29908

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N267AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A29908
Octal
50514410
Decimal
10,656,008
Country
US
Tail
N267AK
Type
B739
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
416
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A29908.

Country allocation

The ICAO 24-bit address A29908 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
ASA508 Alaska Airlines 7 2026-04-16
ASA388 Alaska Airlines 5 2026-05-18
ASA281 Alaska Airlines 5 2026-06-13
ASA758 - 4 2026-07-11
ASA737 - 4 2026-07-12
ASA612 - 4 2026-06-24
ASA569 Alaska Airlines 4 2026-04-30
ASA568 Alaska Airlines 4 2026-04-29
ASA401 - 4 2026-07-10
ASA382 Alaska Airlines 4 2026-06-13
ASA227 Alaska Airlines 4 2026-04-17
ASA226 - 4 2026-06-15
ASA767 Alaska Airlines 3 2026-06-20
ASA684 - 3 2026-07-10
ASA648 - 3 2026-07-15
ASA645 Alaska Airlines 3 2026-07-11
ASA611 Alaska Airlines 3 2026-07-24
ASA606 Alaska Airlines 3 2026-06-02
ASA603 Alaska Airlines 3 2026-06-02
ASA572 - 3 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA509 SEA → SJC Jul 26, 19:25 UTCJul 26, 22:00 UTC2h 35m
2026-07-26 ASA317 BOS → SEA Jul 26, 15:00 UTCJul 26, 17:30 UTC2h 30m
2026-07-26 ASA1627 PDX → DEN Jul 26, 01:30 UTCJul 26, 03:35 UTC2h 5m
2026-07-25 ASA1422 PDX → SJD Jul 25, 14:30 UTCJul 25, 23:15 UTC8h 45m
2026-07-24 ASA783 ATL → PDX Jul 24, 23:05 UTCJul 25, 03:55 UTC4h 50m
2026-07-24 ASA334 LAX → PDX Jul 24, 16:40 UTCJul 24, 21:50 UTC5h 10m
2026-07-24 ASA75 PDX → ANC Jul 24, 11:00 UTCJul 24, 13:50 UTC2h 50m
2026-07-24 ASA75 PDX → ANC Jul 24, 11:04 UTCJul 24, 13:33 UTC2h 29m
2026-07-24 ASA669 RNO → SEA Jul 24, 06:30 UTCJul 24, 09:45 UTC3h 15m
2026-07-24 ASA611 LAX → SEA Jul 24, 02:10 UTCJul 24, 04:40 UTC2h 30m
2026-07-23 ASA515 BOS → PDX Jul 23, 22:00 UTCJul 24, 00:45 UTC2h 45m
2026-07-23 ASA514 PDX → BOS Jul 23, 18:05 UTCJul 23, 20:40 UTC2h 35m
2026-07-23 ASA1349 PDX → PHX Jul 23, 14:20 UTCJul 23, 16:35 UTC2h 15m
2026-07-22 ASA290 PDX → EWR Jul 22, 21:30 UTCJul 23, 03:15 UTC5h 45m
2026-07-22 ASA294 SFO → EWR Jul 22, 15:05 UTCJul 22, 19:30 UTC4h 25m
2026-07-22 ASA1520 LAX → SFO Jul 22, 10:20 UTCJul 22, 12:15 UTC1h 55m
2026-07-22 ASA1520 LAX → SFO Jul 22, 08:44 UTCJul 22, 12:05 UTC3h 21m
2026-07-22 ASA1880 SFO → PHX Jul 22, 03:45 UTCJul 22, 05:25 UTC1h 40m
2026-07-22 ASA1880 SFO → PHX Jul 22, 03:43 UTCJul 22, 07:02 UTC3h 19m
2026-07-21 ASA1305 LAX → SEA Jul 21, 20:25 UTCJul 21, 22:30 UTC2h 5m
2026-07-21 ASA1602 SFO → LAX Jul 21, 18:10 UTCJul 21, 19:05 UTC55m
2026-07-21 ASA1602 SFO → LAX Jul 21, 18:08 UTCJul 21, 18:57 UTC49m
2026-07-21 ASA526 PDX → SFO Jul 21, 15:25 UTCJul 21, 16:55 UTC1h 30m
2026-07-21 ASA609 LAX → PDX Jul 21, 09:30 UTCJul 21, 12:50 UTC3h 20m
2026-07-21 ASA212 - Jul 21, 03:30 UTCJul 21, 07:35 UTC4h 5m
2026-07-21 ASA1385 SJC → SEA Jul 21, 00:15 UTCJul 21, 02:10 UTC1h 55m
2026-07-20 ASA384 SEA → BOS Jul 20, 21:00 UTCJul 20, 22:30 UTC1h 30m
2026-07-20 ASA383 - Jul 20, 17:55 UTCJul 20, 19:35 UTC1h 40m
2026-07-20 ASA1301 LAX → SEA Jul 20, 01:35 UTCJul 20, 03:40 UTC2h 5m
2026-07-19 ASA713 SFO → JAC Jul 19, 21:59 UTCJul 19, 23:41 UTC1h 42m
2026-07-19 ASA713 SFO → JAC Jul 19, 21:50 UTCJul 19, 23:55 UTC2h 5m
2026-07-19 ASA621 PDX → SFO Jul 19, 18:55 UTCJul 19, 20:00 UTC1h 5m
2026-07-19 ASA485 CHS → SEA Jul 19, 15:10 UTCJul 19, 16:25 UTC1h 15m
2026-07-19 ASA662 - Jul 19, 01:30 UTCJul 19, 03:40 UTC2h 10m
2026-07-18 ASA700 SEA → PHX Jul 18, 21:30 UTCJul 19, 00:05 UTC2h 35m
2026-07-18 ASA338 BOS → SEA Jul 18, 13:25 UTCJul 18, 19:15 UTC5h 50m
2026-07-18 ASA536 SEA → BOS Jul 18, 06:50 UTCJul 18, 11:25 UTC4h 35m
2026-07-17 ASA326 TPA → SEA Jul 17, 23:55 UTCJul 18, 05:05 UTC5h 11m
2026-07-17 ASA262 SEA → TPA Jul 17, 16:34 UTCJul 17, 22:25 UTC5h 50m
2026-07-17 ASA440 - Jul 17, 11:15 UTCJul 17, 14:55 UTC3h 40m
2026-07-17 ASA307 SEA → MKE Jul 17, 01:39 UTCJul 17, 04:54 UTC3h 15m
2026-07-16 ASA363 ANC → SEA Jul 16, 20:25 UTCJul 16, 23:35 UTC3h 10m
2026-07-16 ASA432 DEN → ANC Jul 16, 13:34 UTCJul 16, 18:40 UTC5h 5m
2026-07-16 ASA310 SEA → DEN Jul 16, 02:20 UTCJul 16, 04:30 UTC2h 10m
2026-07-15 ASA641 - Jul 15, 21:45 UTCJul 16, 00:20 UTC2h 35m
2026-07-15 ASA648 SEA → TUS Jul 15, 17:40 UTCJul 15, 20:30 UTC2h 50m
2026-07-15 ASA68 - Jul 15, 14:25 UTCJul 15, 15:50 UTC1h 25m
2026-07-14 ASA1561 - Jul 14, 22:45 UTCJul 15, 03:25 UTC4h 40m
2026-07-14 ASA1810 - Jul 14, 17:40 UTCJul 14, 20:50 UTC3h 10m
2026-07-14 ASA1810 SEA → ANC Jul 14, 17:37 UTCJul 14, 20:50 UTC3h 13m

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 N267AK page for operator, model, and routing details .

Mode-S A29908 frequently asked

What is Mode-S code A29908?
A29908 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N267AK.
Where is Mode-S A29908 registered?
Mode-S code A29908 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 A29908 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A29908, octal 50514410, decimal 10,656,008.
What flights does A29908 operate?
Mode-S A29908 has broadcast 20 distinct callsigns, including ASA508, ASA388, ASA281, ASA758, ASA737.