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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
Broadcasting now · callsign ASA406 · 2,750 ft
Flights observed
365
Distinct callsigns
20
Country
US
Last broadcast
15m ago

Current position

A29908 is currently broadcasting. Map zoomed to live position.

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
ASA645 Alaska Airlines 3 2026-07-11
ASA606 Alaska Airlines 3 2026-06-02
ASA603 Alaska Airlines 3 2026-06-02
ASA572 - 3 2026-06-23
ASA558 Alaska Airlines 3 2026-05-14
ASA555 Alaska Airlines 3 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASA406 - Jul 13, 23:50 UTCJul 14, 04:00 UTC4h 10m
2026-07-13 ASA384 - Jul 13, 20:45 UTCJul 13, 22:15 UTC1h 30m
2026-07-13 ASA383 - Jul 13, 17:30 UTCJul 13, 19:20 UTC1h 50m
2026-07-13 ASA344 - Jul 13, 11:20 UTCJul 13, 15:30 UTC4h 10m
2026-07-13 ASA344 DTW → SEA Jul 13, 11:20 UTCJul 13, 15:18 UTC3h 58m
2026-07-13 ASA343 SEA → DTW Jul 13, 05:55 UTCJul 13, 09:35 UTC3h 40m
2026-07-12 ASA737 IAD → SEA Jul 12, 22:40 UTCJul 13, 03:40 UTC5h 0m
2026-07-12 ASA737 SEA → IAD Jul 12, 16:25 UTCJul 12, 21:15 UTC4h 50m
2026-07-12 ASA323 - Jul 12, 13:15 UTCJul 12, 14:30 UTC1h 15m
2026-07-12 ASA1616 - Jul 12, 01:05 UTCJul 12, 02:20 UTC1h 15m
2026-07-12 ASA1616 PDX → RNO Jul 12, 01:15 UTCJul 12, 02:11 UTC56m
2026-07-11 ASA1302 - Jul 11, 22:25 UTCJul 11, 23:40 UTC1h 15m
2026-07-11 ASA655 SEA → SFO Jul 11, 19:20 UTCJul 11, 21:10 UTC1h 50m
2026-07-11 ASA645 PHX → SEA Jul 11, 14:35 UTCJul 11, 17:10 UTC2h 35m
2026-07-11 ASA645 PHX → SEA Jul 11, 14:35 UTCJul 11, 16:57 UTC2h 22m
2026-07-11 ASA644 - Jul 11, 04:35 UTCJul 11, 07:00 UTC2h 25m
2026-07-11 ASA758 - Jul 11, 01:40 UTCJul 11, 03:05 UTC1h 25m
2026-07-10 ASA236 PDX → SFO Jul 10, 22:15 UTCJul 10, 23:40 UTC1h 25m
2026-07-10 ASA684 DEN → PDX Jul 10, 18:15 UTCJul 10, 20:25 UTC2h 10m
2026-07-10 ASA401 PDX → DEN Jul 10, 14:30 UTCJul 10, 16:40 UTC2h 10m
2026-07-09 ASA1396 AUS → PDX Jul 9, 22:55 UTCJul 10, 02:35 UTC3h 40m
2026-07-09 ASA1396 AUS → PDX Jul 9, 22:54 UTCJul 10, 02:26 UTC3h 32m
2026-07-09 ASA540 PDX → AUS Jul 9, 17:50 UTCJul 9, 21:15 UTC3h 25m
2026-07-09 ASA541 AUS → PDX Jul 9, 12:35 UTCJul 9, 16:10 UTC3h 35m
2026-07-09 ASA372 SEA → AUS Jul 9, 01:35 UTCJul 9, 05:10 UTC3h 35m
2026-07-08 ASA734 SLC → SEA Jul 8, 22:15 UTCJul 9, 00:00 UTC1h 45m
2026-07-08 ASA734 SLC → SEA Jul 8, 22:14 UTCJul 8, 23:45 UTC1h 31m
2026-07-08 ASA733 SEA → SLC Jul 8, 19:10 UTCJul 8, 20:45 UTC1h 35m
2026-07-08 ASA82 - Jul 8, 14:05 UTCJul 8, 17:00 UTC2h 55m
2026-07-08 ASA1545 ORD → ANC Jul 8, 06:15 UTCJul 8, 12:10 UTC5h 55m
2026-07-08 ASA1493 SAN → ORD Jul 8, 00:35 UTCJul 8, 04:10 UTC3h 35m
2026-07-07 ASA551 DFW → SAN Jul 7, 20:15 UTCJul 7, 22:45 UTC2h 30m
2026-07-07 ASA340 SEA → DFW Jul 7, 15:00 UTCJul 7, 18:25 UTC3h 25m
2026-07-06 ASA537 - Jul 6, 22:15 UTCJul 7, 00:00 UTC1h 45m
2026-07-06 ASA537 BUR → SEA Jul 6, 22:14 UTCJul 7, 00:06 UTC1h 52m
2026-07-06 ASA529 SEA → BUR Jul 6, 18:30 UTCJul 6, 20:40 UTC2h 10m
2026-07-06 ASA670 PDX → LAS Jul 6, 11:20 UTCJul 6, 16:20 UTC5h 0m
2026-07-06 ASA677 SEA → RDU Jul 6, 05:10 UTCJul 6, 09:45 UTC4h 35m
2026-07-05 ASA500 - Jul 5, 21:45 UTCJul 6, 02:00 UTC4h 15m
2026-07-05 ASA500 SEA → IND Jul 5, 16:35 UTCJul 5, 20:15 UTC3h 40m
2026-07-05 ASA387 MSP → SEA Jul 5, 11:20 UTCJul 5, 14:35 UTC3h 15m
2026-07-04 ASA527 SNA → SEA Jul 4, 21:10 UTCJul 4, 23:55 UTC2h 45m
2026-07-04 ASA338 SEA → SJC Jul 4, 13:20 UTCJul 4, 18:55 UTC5h 35m
2026-07-04 ASA536 SEA → BOS Jul 4, 06:45 UTCJul 4, 11:25 UTC4h 40m
2026-07-04 ASA611 PHX → SEA Jul 4, 02:10 UTCJul 4, 04:50 UTC2h 40m
2026-07-03 ASA515 KEH → PHX Jul 3, 22:05 UTCJul 4, 00:30 UTC2h 25m
2026-07-03 ASA514 - Jul 3, 18:05 UTCJul 3, 20:45 UTC2h 40m
2026-07-03 ASA514 PHX → PAE Jul 3, 18:04 UTCJul 3, 20:43 UTC2h 39m
2026-07-03 ASA1349 PDX → PHX Jul 3, 14:15 UTCJul 3, 16:25 UTC2h 10m
2026-07-03 ASA498 SEA → PDX Jul 3, 05:00 UTCJul 3, 05:25 UTC25m

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?
Yes. Mode-S A29908 is currently airborne.
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.