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sensors Mode-S transponder

A682EF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N519AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A682EF
Octal
51501357
Decimal
10,912,495
Country
US
Tail
N519AS
Type
B738
Broadcasting now · callsign ASA1357 · 31,500 ft
Flights observed
399
Distinct callsigns
20
Country
US
Last broadcast
45m ago

Current position

A682EF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A682EF 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
ASA225 Alaska Airlines 7 2026-04-29
ASA248 Alaska Airlines 6 2026-06-11
ASA9800 Alaska Airlines 5 2026-05-18
ASA724 Alaska Airlines 5 2026-05-26
ASA130 Alaska Airlines 5 2026-04-17
ASA120 Alaska Airlines 5 2026-04-18
ASA1 Alaska Airlines 5 2026-05-29
ASA770 Alaska Airlines 4 2026-05-05
ASA759 Alaska Airlines 4 2026-05-07
ASA561 - 4 2026-07-03
ASA498 - 4 2026-06-29
ASA485 Alaska Airlines 4 2026-06-01
ASA341 - 4 2026-07-02
ASA322 - 4 2026-07-02
ASA1357 - 4 2026-07-14
ASA89 - 3 2026-06-19
ASA88 - 3 2026-06-20
ASA796 Alaska Airlines 3 2026-05-31
ASA760 - 3 2026-07-13
ASA713 - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA1357 - Jul 14, 18:30 UTCJul 14, 19:45 UTC1h 15m
2026-07-14 ASA512 - Jul 14, 14:40 UTCJul 14, 16:45 UTC2h 5m
2026-07-14 ASA336 BFI → SAN Jul 14, 02:50 UTCJul 14, 05:35 UTC2h 45m
2026-07-13 ASA760 - Jul 13, 22:40 UTCJul 14, 00:45 UTC2h 5m
2026-07-13 ASA760 SNA → SEA Jul 13, 22:36 UTCJul 14, 00:37 UTC2h 1m
2026-07-13 ASA1357 SEA → SNA Jul 13, 18:50 UTCJul 13, 21:20 UTC2h 30m
2026-07-13 ASA479 LAS → SEA Jul 13, 15:00 UTCJul 13, 16:55 UTC1h 55m
2026-07-13 ASA704 SEA → LAS Jul 13, 03:48 UTCJul 13, 05:53 UTC2h 5m
2026-07-13 ASA704 SEA → LAS Jul 13, 03:50 UTCJul 13, 06:05 UTC2h 15m
2026-07-12 ASA510 MSP → SEA Jul 12, 22:10 UTCJul 13, 01:35 UTC3h 25m
2026-07-12 ASA1429 PDX → MSP Jul 12, 17:40 UTCJul 12, 20:30 UTC2h 50m
2026-07-12 ASA1429 PDX → MSP Jul 12, 17:37 UTCJul 12, 20:25 UTC2h 48m
2026-07-12 ASA1566 BOI → PDX Jul 12, 12:10 UTCJul 12, 13:05 UTC55m
2026-07-12 ASA1504 - Jul 12, 02:01 UTCJul 12, 05:50 UTC3h 50m
2026-07-11 ASA1503 - Jul 11, 20:50 UTCJul 12, 00:35 UTC3h 45m
2026-07-11 ASA428 AUS → SEA Jul 11, 18:40 UTCJul 11, 19:35 UTC55m
2026-07-11 ASA283 - Jul 11, 11:55 UTCJul 11, 16:15 UTC4h 20m
2026-07-11 ASA280 - Jul 11, 05:45 UTCJul 11, 09:40 UTC3h 55m
2026-07-11 ASA1301 - Jul 11, 01:50 UTCJul 11, 03:55 UTC2h 5m
2026-07-10 ASA713 - Jul 10, 22:05 UTCJul 11, 00:05 UTC2h 0m
2026-07-10 ASA1567 ANC → PDX Jul 10, 17:20 UTCJul 10, 20:35 UTC3h 15m
2026-07-10 ASA1339 - Jul 10, 15:05 UTCJul 10, 15:45 UTC40m
2026-07-10 ASA284 SEA → FAI Jul 10, 01:40 UTCJul 10, 04:50 UTC3h 10m
2026-07-09 ASA567 - Jul 9, 21:45 UTCJul 9, 23:45 UTC2h 0m
2026-07-09 ASA567 ONT → SEA Jul 9, 21:45 UTCJul 9, 23:46 UTC2h 1m
2026-07-09 ASA565 SEA → ONT Jul 9, 18:10 UTCJul 9, 20:15 UTC2h 5m
2026-07-09 ASA1473 KOA → SEA Jul 9, 13:40 UTCJul 9, 16:05 UTC2h 25m
2026-07-09 ASA336 PDX → FLL Jul 9, 02:25 UTCJul 9, 04:40 UTC2h 15m
2026-07-08 ASA760 - Jul 8, 22:05 UTCJul 9, 00:25 UTC2h 20m
2026-07-08 ASA1357 - Jul 8, 18:25 UTCJul 8, 20:45 UTC2h 20m
2026-07-08 ASA1357 SEA → SNA Jul 8, 18:25 UTCJul 8, 20:39 UTC2h 14m
2026-07-08 ASA479 LAS → SEA Jul 8, 14:35 UTCJul 8, 16:45 UTC2h 10m
2026-07-08 ASA531 PDX → LAS Jul 8, 01:20 UTCJul 8, 03:05 UTC1h 45m
2026-07-07 ASA229 - Jul 7, 22:45 UTCJul 7, 23:35 UTC50m
2026-07-07 ASA441 MSY → SEA Jul 7, 20:10 UTCJul 7, 21:05 UTC55m
2026-07-07 ASA651 PHX → SEA Jul 7, 15:10 UTCJul 7, 17:05 UTC1h 55m
2026-07-07 ASA91 - Jul 7, 04:55 UTCJul 7, 06:35 UTC1h 40m
2026-07-07 ASA774 - Jul 7, 01:10 UTCJul 7, 03:20 UTC2h 10m
2026-07-06 ASA773 - Jul 6, 21:45 UTCJul 7, 00:05 UTC2h 20m
2026-07-06 ASA471 - Jul 6, 17:45 UTCJul 6, 19:55 UTC2h 10m
2026-07-06 ASA1404 - Jul 6, 14:15 UTCJul 6, 16:20 UTC2h 5m
2026-07-05 ASA1350 - Jul 5, 23:50 UTCJul 6, 04:25 UTC4h 35m
2026-07-05 ASA1345 SEA → BNA Jul 5, 18:00 UTCJul 5, 22:05 UTC4h 5m
2026-07-05 ASA237 SEA → SEA Jul 5, 01:20 UTCJul 5, 13:45 UTC12h 25m
2026-07-04 ASA555 MSP → SEA Jul 4, 19:55 UTCJul 4, 23:20 UTC3h 25m
2026-07-04 ASA555 SEA → MSP Jul 4, 15:55 UTCJul 4, 18:40 UTC2h 45m
2026-07-04 ASA454 - Jul 4, 01:45 UTCJul 4, 04:05 UTC2h 20m
2026-07-03 ASA1551 SEA → SNA Jul 3, 22:20 UTCJul 4, 00:30 UTC2h 10m
2026-07-03 ASA664 SLC → SEA Jul 3, 19:10 UTCJul 3, 20:50 UTC1h 40m
2026-07-03 ASA360 SEA → SLC Jul 3, 16:15 UTCJul 3, 17:45 UTC1h 30m

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 N519AS page for operator, model, and routing details .

Mode-S A682EF frequently asked

What is Mode-S code A682EF?
A682EF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N519AS.
Where is Mode-S A682EF registered?
Mode-S code A682EF 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 A682EF broadcasting right now?
Yes. Mode-S A682EF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A682EF, octal 51501357, decimal 10,912,495.
What flights does A682EF operate?
Mode-S A682EF has broadcast 20 distinct callsigns, including ASA225, ASA248, ASA9800, ASA724, ASA130.