Apparatus

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sensors Mode-S transponder

A29CBF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N268AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A29CBF
Octal
50516277
Decimal
10,656,959
Country
US
Tail
N268AK
Type
B739
No current signal · last broadcast Jul 26, 20:05 UTC
Flights observed
473
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:05 UTC

Last known position

Most recent position reported by Mode-S A29CBF.

Country allocation

The ICAO 24-bit address A29CBF 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 8 2026-04-18
ASA340 Alaska Airlines 6 2026-07-24
ASA747 Alaska Airlines 5 2026-06-07
ASA731 Alaska Airlines 5 2026-06-07
ASA56 Alaska Airlines 5 2026-04-19
ASA479 Alaska Airlines 5 2026-04-19
ASA212 Alaska Airlines 5 2026-06-15
ASA1349 Alaska Airlines 5 2026-06-15
ASA787 Alaska Airlines 4 2026-07-17
ASA765 - 4 2026-06-30
ASA700 - 4 2026-06-30
ASA67 Alaska Airlines 4 2026-06-13
ASA662 - 4 2026-07-01
ASA647 Alaska Airlines 4 2026-07-20
ASA551 Alaska Airlines 4 2026-07-24
ASA533 Alaska Airlines 4 2026-07-07
ASA462 Alaska Airlines 4 2026-05-04
ASA450 - 4 2026-06-16
ASA412 Alaska Airlines 4 2026-05-08
ASA1493 Alaska Airlines 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA757 PDX → LAS Jul 26, 18:05 UTCJul 26, 20:00 UTC1h 55m
2026-07-26 ASA511 BNA → PDX Jul 26, 14:15 UTCJul 26, 16:30 UTC2h 15m
2026-07-26 ASA1550 ANC → SEA Jul 26, 07:15 UTCJul 26, 12:40 UTC5h 25m
2026-07-26 ASA352 ANC → SEA Jul 26, 01:50 UTCJul 26, 02:45 UTC55m
2026-07-25 ASA351 LAX → SEA Jul 25, 23:40 UTCJul 26, 00:30 UTC50m
2026-07-25 ASA586 SEA → DFW Jul 25, 19:55 UTCJul 25, 20:40 UTC45m
2026-07-25 ASA586 SEA → DFW Jul 25, 17:15 UTCJul 25, 18:00 UTC45m
2026-07-25 ASA1545 ORD → ANC Jul 25, 06:05 UTCJul 25, 12:25 UTC6h 20m
2026-07-25 ASA1493 SAN → ORD Jul 25, 01:00 UTCJul 25, 04:45 UTC3h 45m
2026-07-24 ASA551 PHL → SEA Jul 24, 21:05 UTCJul 24, 23:30 UTC2h 25m
2026-07-24 ASA340 SFO → EWR Jul 24, 16:25 UTCJul 24, 19:40 UTC3h 15m
2026-07-24 ASA1444 SFO → CUN Jul 24, 12:40 UTCJul 24, 14:15 UTC1h 35m
2026-07-24 ASA1459 SFO → EWR Jul 24, 04:05 UTCJul 24, 05:30 UTC1h 25m
2026-07-23 ASA289 EWR → LAX Jul 23, 23:10 UTCJul 24, 01:55 UTC2h 45m
2026-07-23 ASA1371 MZT → SFO Jul 23, 19:10 UTCJul 23, 21:35 UTC2h 25m
2026-07-23 ASA282 SAN → EWR Jul 23, 03:40 UTCJul 23, 05:15 UTC1h 35m
2026-07-23 ASA282 SAN → EWR Jul 23, 03:33 UTCJul 23, 05:07 UTC1h 34m
2026-07-23 ASA393 JFK → SAN Jul 23, 00:40 UTCJul 23, 02:25 UTC1h 45m
2026-07-22 ASA286 - Jul 22, 21:50 UTCJul 22, 23:00 UTC1h 10m
2026-07-22 ASA286 BZN → SEA Jul 22, 21:29 UTCJul 22, 22:52 UTC1h 23m
2026-07-22 ASA285 - Jul 22, 19:05 UTCJul 22, 19:55 UTC50m
2026-07-22 ASA285 SEA → BZN Jul 22, 19:03 UTCJul 22, 20:13 UTC1h 10m
2026-07-22 ASA587 ORD → SEA Jul 22, 13:25 UTCJul 22, 15:05 UTC1h 40m
2026-07-22 ASA587 ORD → SEA Jul 22, 13:38 UTCJul 22, 17:18 UTC3h 40m
2026-07-22 ASA1724 ANC → ORD Jul 22, 05:41 UTCJul 22, 10:35 UTC4h 54m
2026-07-22 ASA352 ANC → SEA Jul 22, 02:10 UTCJul 22, 03:05 UTC55m
2026-07-21 ASA351 LAX → SEA Jul 21, 23:55 UTCJul 22, 00:45 UTC50m
2026-07-21 ASA83 SEA → ANC Jul 21, 19:20 UTCJul 21, 22:35 UTC3h 15m
2026-07-21 ASA83 SEA → ANC Jul 21, 19:17 UTCJul 21, 22:23 UTC3h 6m
2026-07-21 ASA82 ANC → SEA Jul 21, 14:10 UTCJul 21, 17:30 UTC3h 20m
2026-07-21 ASA1545 ORD → ANC Jul 21, 06:40 UTCJul 21, 12:40 UTC6h 0m
2026-07-21 ASA1493 SAN → ORD Jul 21, 00:45 UTCJul 21, 04:35 UTC3h 50m
2026-07-20 ASA551 DFW → SAN Jul 20, 20:35 UTCJul 20, 23:00 UTC2h 25m
2026-07-20 ASA340 SFO → EWR Jul 20, 15:55 UTCJul 20, 19:10 UTC3h 15m
2026-07-20 ASA647 LAS → PDX Jul 20, 01:00 UTCJul 20, 05:00 UTC4h 0m
2026-07-19 ASA647 LAS → PDX Jul 19, 20:35 UTCJul 19, 23:45 UTC3h 10m
2026-07-19 ASA47 ORD → ANC Jul 19, 15:15 UTCJul 19, 18:20 UTC3h 5m
2026-07-18 ASA1560 SEA → ANC Jul 18, 05:30 UTCJul 18, 08:35 UTC3h 5m
2026-07-17 ASA787 LAS → SEA Jul 17, 22:20 UTCJul 18, 03:20 UTC5h 1m
2026-07-17 ASA787 LAS → SEA Jul 17, 15:55 UTCJul 17, 20:44 UTC4h 50m
2026-07-16 ASA31 JFK → SEA Jul 16, 21:10 UTCJul 17, 02:32 UTC5h 22m
2026-07-16 ASA31 JFK → SEA Jul 16, 21:15 UTCJul 17, 02:45 UTC5h 30m
2026-07-16 ASA26 SEA → JFK Jul 16, 14:15 UTCJul 16, 18:59 UTC4h 45m
2026-07-16 ASA647 STL → SEA Jul 16, 01:10 UTCJul 16, 04:50 UTC3h 40m
2026-07-15 ASA647 SEA → STL Jul 15, 20:10 UTCJul 15, 23:45 UTC3h 35m
2026-07-15 ASA215 AUS → SEA Jul 15, 14:40 UTCJul 15, 18:15 UTC3h 35m
2026-07-15 ASA1370 PDX → AUS Jul 15, 01:10 UTCJul 15, 04:45 UTC3h 35m
2026-07-14 ASA742 PHX → PDX Jul 14, 21:20 UTCJul 14, 23:30 UTC2h 9m
2026-07-14 ASA593 - Jul 14, 17:30 UTCJul 14, 20:05 UTC2h 35m
2026-07-14 ASA377 ATL → SEA Jul 14, 11:15 UTCJul 14, 15:40 UTC4h 25m

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 N268AK page for operator, model, and routing details .

Mode-S A29CBF frequently asked

What is Mode-S code A29CBF?
A29CBF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N268AK.
Where is Mode-S A29CBF registered?
Mode-S code A29CBF 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 A29CBF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A29CBF, octal 50516277, decimal 10,656,959.
What flights does A29CBF operate?
Mode-S A29CBF has broadcast 20 distinct callsigns, including ASA508, ASA340, ASA747, ASA731, ASA56.