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sensors Mode-S transponder

A2A686

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N270AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A2A686
Octal
50523206
Decimal
10,659,462
Country
US
Tail
N270AK
Type
B739
Broadcasting now · callsign ASA468 · 36,000 ft
Flights observed
394
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Current position

A2A686 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A2A686 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
ASA450 - 6 2026-07-01
ASA412 - 6 2026-06-15
ASA731 Alaska Airlines 5 2026-07-22
ASA682 Alaska Airlines 5 2026-05-08
ASA565 Alaska Airlines 5 2026-07-25
ASA356 - 5 2026-06-28
ASA1349 Alaska Airlines 5 2026-06-01
ASA778 Alaska Airlines 4 2026-05-03
ASA695 Alaska Airlines 4 2026-07-19
ASA621 - 4 2026-06-26
ASA500 Alaska Airlines 4 2026-05-29
ASA230 Alaska Airlines 4 2026-06-09
ASA1600 Alaska Airlines 4 2026-06-20
ASA1532 Alaska Airlines 4 2026-07-23
ASA1367 Alaska Airlines 4 2026-05-28
ASA9440 - 3 2026-07-16
ASA798 - 3 2026-07-17
ASA785 - 3 2026-06-16
ASA784 - 3 2026-06-24
ASA67 Alaska Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA535 AUS → SFO Jul 26, 19:35 UTCJul 26, 21:30 UTC1h 55m
2026-07-26 ASA241 SEA → MKE Jul 26, 13:20 UTCJul 26, 17:20 UTC4h 0m
2026-07-26 ASA398 SEA → EWR Jul 26, 07:05 UTCJul 26, 10:50 UTC3h 45m
2026-07-26 ASA282 SAN → EWR Jul 26, 03:45 UTCJul 26, 05:20 UTC1h 35m
2026-07-26 ASA393 JFK → SAN Jul 26, 01:00 UTCJul 26, 02:35 UTC1h 35m
2026-07-25 ASA567 PDX → SJD Jul 25, 21:20 UTCJul 25, 23:20 UTC2h 0m
2026-07-25 ASA567 PDX → SJD Jul 25, 21:18 UTCJul 25, 23:10 UTC1h 52m
2026-07-25 ASA565 LAX → PDX Jul 25, 17:50 UTCJul 25, 20:05 UTC2h 15m
2026-07-25 ASA565 LAX → PDX Jul 25, 17:48 UTCJul 25, 20:09 UTC2h 21m
2026-07-25 ASA1473 KOA → SEA Jul 25, 13:35 UTCJul 25, 15:50 UTC2h 15m
2026-07-25 ASA1473 KOA → SEA Jul 25, 13:33 UTCJul 25, 15:34 UTC2h 1m
2026-07-25 ASA369 MCO → SFO Jul 25, 01:00 UTCJul 25, 03:20 UTC2h 20m
2026-07-24 ASA1402 SFO → AUS Jul 24, 21:40 UTCJul 24, 23:30 UTC1h 50m
2026-07-24 ASA467 SFO → ZIH Jul 24, 17:52 UTCJul 24, 20:11 UTC2h 19m
2026-07-24 ASA467 SFO → ZIH Jul 24, 17:45 UTCJul 24, 20:10 UTC2h 25m
2026-07-24 ASA554 PDX → ORD Jul 24, 12:10 UTCJul 24, 15:35 UTC3h 25m
2026-07-24 ASA553 IAD → SFO Jul 24, 01:40 UTCJul 24, 04:50 UTC3h 10m
2026-07-23 ASA439 SEA → SFO Jul 23, 19:50 UTCJul 24, 00:05 UTC4h 15m
2026-07-23 ASA439 SEA → SFO Jul 23, 19:49 UTCJul 23, 23:51 UTC4h 2m
2026-07-23 ASA1420 PDX → IAH Jul 23, 14:25 UTCJul 23, 17:53 UTC3h 28m
2026-07-23 ASA1420 - Jul 23, 14:30 UTCJul 23, 18:10 UTC3h 40m
2026-07-23 ASA609 LAX → PDX Jul 23, 09:30 UTCJul 23, 12:35 UTC3h 5m
2026-07-23 ASA1532 SEA → LAX Jul 23, 02:08 UTCJul 23, 07:15 UTC5h 7m
2026-07-23 ASA1532 SEA → LAX Jul 23, 01:55 UTCJul 23, 07:25 UTC5h 30m
2026-07-22 ASA731 SEA → SFO Jul 22, 22:00 UTCJul 23, 00:30 UTC2h 30m
2026-07-22 ASA1467 LAS → PDX Jul 22, 18:10 UTCJul 22, 19:55 UTC1h 45m
2026-07-22 ASA1636 - Jul 22, 05:20 UTCJul 22, 13:15 UTC7h 55m
2026-07-22 ASA67 SEA → KTN Jul 22, 03:25 UTCJul 22, 03:40 UTC15m
2026-07-22 ASA67 SEA → KTN Jul 22, 01:40 UTCJul 22, 02:05 UTC25m
2026-07-21 ASA67 SEA → KTN Jul 21, 23:05 UTCJul 22, 00:20 UTC1h 15m
2026-07-21 ASA48 ANC → SEA Jul 21, 18:15 UTCJul 21, 21:15 UTC3h 0m
2026-07-21 ASA1532 SEA → LAX Jul 21, 02:00 UTCJul 21, 07:00 UTC5h 0m
2026-07-20 ASA731 PDX → PHX Jul 20, 22:05 UTCJul 21, 00:40 UTC2h 35m
2026-07-20 ASA251 GEG → PDX Jul 20, 20:00 UTCJul 20, 20:50 UTC50m
2026-07-20 ASA250 PDX → GEG Jul 20, 17:55 UTCJul 20, 18:35 UTC40m
2026-07-20 ASA1643 - Jul 20, 15:10 UTCJul 20, 16:15 UTC1h 5m
2026-07-20 ASA1616 PDX → RNO Jul 20, 01:15 UTCJul 20, 02:20 UTC1h 5m
2026-07-19 ASA1315 LAX → PDX Jul 19, 21:55 UTCJul 19, 23:45 UTC1h 50m
2026-07-19 ASA695 SJC → PDX Jul 19, 18:15 UTCJul 19, 20:15 UTC2h 0m
2026-07-19 ASA695 SJC → PDX Jul 19, 18:08 UTCJul 19, 20:02 UTC1h 54m
2026-07-19 ASA311 SEA → SFO Jul 19, 10:50 UTCJul 19, 16:25 UTC5h 35m
2026-07-18 ASA460 SEA → BOS Jul 18, 23:30 UTCJul 19, 04:05 UTC4h 35m
2026-07-18 ASA603 - Jul 18, 19:05 UTCJul 18, 21:30 UTC2h 25m
2026-07-18 ASA606 SEA → PHX Jul 18, 14:50 UTCJul 18, 17:35 UTC2h 45m
2026-07-18 ASA532 MSP → SEA Jul 18, 01:20 UTCJul 18, 04:35 UTC3h 16m
2026-07-17 ASA527 SEA → MSP Jul 17, 21:15 UTCJul 18, 00:00 UTC2h 45m
2026-07-17 ASA798 - Jul 17, 17:15 UTCJul 17, 19:20 UTC2h 5m
2026-07-17 ASA505 - Jul 17, 13:20 UTCJul 17, 15:44 UTC2h 25m
2026-07-17 ASA1508 FAI → SEA Jul 17, 03:59 UTCJul 17, 07:14 UTC3h 15m
2026-07-16 ASA1507 SEA → FAI Jul 16, 23:55 UTCJul 17, 03:05 UTC3h 10m

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 N270AK page for operator, model, and routing details .

Mode-S A2A686 frequently asked

What is Mode-S code A2A686?
A2A686 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N270AK.
Where is Mode-S A2A686 registered?
Mode-S code A2A686 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 A2A686 broadcasting right now?
Yes. Mode-S A2A686 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2A686, octal 50523206, decimal 10,659,462.
What flights does A2A686 operate?
Mode-S A2A686 has broadcast 20 distinct callsigns, including ASA450, ASA412, ASA731, ASA682, ASA565.