Apparatus

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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
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
452
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S A682EF.

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
ASA1325 - 5 2026-07-15
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
ASA760 - 4 2026-07-14
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
ASA325 Alaska Airlines 4 2026-07-25
ASA322 - 4 2026-07-02
ASA1357 - 4 2026-07-14
ASA1356 - 4 2026-07-19
ASA1338 - 4 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA334 LAX → PDX Jul 26, 16:35 UTCJul 26, 20:40 UTC4h 5m
2026-07-26 ASA323 - Jul 26, 13:20 UTCJul 26, 14:35 UTC1h 15m
2026-07-26 ASA323 RNO → SEA Jul 26, 13:17 UTCJul 26, 14:30 UTC1h 13m
2026-07-26 ASA1616 PDX → RNO Jul 26, 01:05 UTCJul 26, 02:00 UTC55m
2026-07-25 ASA325 ORD → PDX Jul 25, 19:35 UTCJul 25, 23:30 UTC3h 55m
2026-07-25 ASA1446 CUN → LAX Jul 25, 14:25 UTCJul 25, 18:05 UTC3h 40m
2026-07-25 ASA201 ANC → BET Jul 25, 00:05 UTCJul 25, 04:50 UTC4h 45m
2026-07-25 ASA201 ANC → BET Jul 25, 00:03 UTCJul 25, 04:46 UTC4h 43m
2026-07-24 ASA506 SEA → BOS Jul 24, 17:55 UTCJul 24, 22:30 UTC4h 35m
2026-07-24 ASA708 HNL → SFO Jul 24, 11:55 UTCJul 24, 16:10 UTC4h 15m
2026-07-24 ASA708 HNL → SFO Jul 24, 11:53 UTCJul 24, 16:06 UTC4h 13m
2026-07-24 ASA394 SJC → PDX Jul 24, 04:55 UTCJul 24, 09:45 UTC4h 50m
2026-07-23 ASA31 JFK → SEA Jul 23, 21:05 UTCJul 24, 02:45 UTC5h 40m
2026-07-23 ASA26 SEA → ORD Jul 23, 14:15 UTCJul 23, 18:50 UTC4h 35m
2026-07-22 ASA313 SEA → DTW Jul 22, 21:45 UTCJul 23, 02:20 UTC4h 35m
2026-07-22 ASA313 SEA → DTW Jul 22, 16:40 UTCJul 22, 20:10 UTC3h 30m
2026-07-22 ASA1409 GDL → SJC Jul 22, 13:30 UTCJul 22, 14:50 UTC1h 20m
2026-07-22 ASA1409 GDL → SJC Jul 22, 13:29 UTCJul 22, 14:49 UTC1h 20m
2026-07-22 ASA1621 SAN → SMF Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 ASA1388 LAX → SJD Jul 22, 01:20 UTCJul 22, 04:00 UTC2h 40m
2026-07-21 ASA1338 - Jul 21, 19:05 UTCJul 21, 22:05 UTC3h 0m
2026-07-21 ASA1338 SJD → SEA Jul 21, 18:24 UTCJul 21, 21:59 UTC3h 35m
2026-07-21 ASA455 RSW → SEA Jul 21, 14:15 UTCJul 21, 15:45 UTC1h 30m
2026-07-21 ASA455 RSW → SEA Jul 21, 14:13 UTCJul 21, 17:05 UTC2h 52m
2026-07-20 ASA59 SEA → ANC Jul 20, 23:40 UTCJul 21, 05:00 UTC5h 20m
2026-07-20 ASA34 SEA → JFK Jul 20, 17:25 UTCJul 20, 21:55 UTC4h 30m
2026-07-20 ASA491 RDU → SEA Jul 20, 13:30 UTCJul 20, 14:55 UTC1h 25m
2026-07-20 ASA1393 SJD → SFO Jul 20, 04:20 UTCJul 20, 06:10 UTC1h 50m
2026-07-19 ASA3 DCA → SEA Jul 19, 21:40 UTCJul 20, 03:00 UTC5h 20m
2026-07-19 ASA10 PDX → DCA Jul 19, 15:15 UTCJul 19, 19:40 UTC4h 25m
2026-07-19 ASA710 OGG → SFO Jul 19, 12:10 UTCJul 19, 13:00 UTC50m
2026-07-19 ASA1356 PDX → GEG Jul 19, 05:07 UTCJul 19, 05:48 UTC41m
2026-07-19 ASA1356 PDX → GEG Jul 19, 05:10 UTCJul 19, 05:55 UTC45m
2026-07-18 ASA253 KOA → PDX Jul 18, 22:05 UTCJul 19, 03:20 UTC5h 15m
2026-07-18 ASA252 PDX → KOA Jul 18, 15:20 UTCJul 18, 20:38 UTC5h 18m
2026-07-18 ASA252 PDX → KOA Jul 18, 15:10 UTCJul 18, 20:35 UTC5h 25m
2026-07-18 ASA1520 FAI → PDX Jul 18, 09:18 UTCJul 18, 12:19 UTC3h 1m
2026-07-18 ASA1520 FAI → PDX Jul 18, 08:55 UTCJul 18, 12:25 UTC3h 30m
2026-07-18 ASA1880 SFO → PHX Jul 18, 04:35 UTCJul 18, 07:40 UTC3h 5m
2026-07-18 ASA289 - Jul 18, 00:10 UTCJul 18, 03:00 UTC2h 51m
2026-07-17 ASA1371 SEA → PHX Jul 17, 20:00 UTCJul 17, 22:44 UTC2h 44m
2026-07-17 ASA1371 SEA → PHX Jul 17, 19:45 UTCJul 17, 22:45 UTC3h 0m
2026-07-17 ASA54 ANC → SEA Jul 17, 15:10 UTCJul 17, 18:15 UTC3h 5m
2026-07-17 ASA212 - Jul 17, 03:50 UTCJul 17, 07:50 UTC4h 0m
2026-07-16 ASA41 JFK → SFO Jul 16, 15:55 UTCJul 16, 21:19 UTC5h 25m
2026-07-16 ASA41 JFK → SFO Jul 16, 15:50 UTCJul 16, 21:01 UTC5h 11m
2026-07-16 ASA211 - Jul 16, 05:00 UTCJul 16, 09:50 UTC4h 50m
2026-07-16 ASA211 SFO → JFK Jul 16, 04:55 UTCJul 16, 09:41 UTC4h 46m
2026-07-15 ASA421 SEA → SFO Jul 15, 18:20 UTCJul 16, 02:15 UTC7h 55m
2026-07-15 ASA1325 - Jul 15, 14:10 UTCJul 15, 16:10 UTC2h 0m

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?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
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, ASA1325.