Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2DCE1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N284AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A2DCE1
Octal
50556341
Decimal
10,673,377
Country
US
Tail
N284AK
Type
B739
No current signal · last broadcast Jul 26, 19:35 UTC
Flights observed
439
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:35 UTC

Last known position

Most recent position reported by Mode-S A2DCE1.

Country allocation

The ICAO 24-bit address A2DCE1 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
ASA1418 Alaska Airlines 8 2026-07-22
ASA405 Alaska Airlines 6 2026-07-07
ASA637 Alaska Airlines 5 2026-06-04
ASA628 Alaska Airlines 5 2026-07-26
ASA391 Alaska Airlines 5 2026-07-24
ASA385 Alaska Airlines 5 2026-07-24
ASA679 - 4 2026-07-19
ASA62 Alaska Airlines 4 2026-06-22
ASA618 - 4 2026-06-30
ASA604 Alaska Airlines 4 2026-06-04
ASA572 - 4 2026-06-20
ASA554 Alaska Airlines 4 2026-06-24
ASA517 Alaska Airlines 4 2026-04-16
ASA500 Alaska Airlines 4 2026-07-25
ASA302 Alaska Airlines 4 2026-06-18
ASA216 - 4 2026-06-28
ASA18 - 4 2026-07-16
ASA1419 Alaska Airlines 4 2026-07-22
ASA1409 - 4 2026-06-29
ASA782 Alaska Airlines 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA20 SFO → JFK Jul 26, 14:35 UTCJul 26, 19:30 UTC4h 55m
2026-07-26 ASA628 SEA → JFK Jul 26, 04:20 UTCJul 26, 06:05 UTC1h 45m
2026-07-25 ASA500 IND → SEA Jul 25, 21:25 UTCJul 26, 01:55 UTC4h 30m
2026-07-25 ASA500 IND → SEA Jul 25, 16:25 UTCJul 25, 19:50 UTC3h 25m
2026-07-25 ASA643 DEN → SEA Jul 25, 12:10 UTCJul 25, 14:30 UTC2h 20m
2026-07-25 ASA642 SEA → DEN Jul 25, 04:05 UTCJul 25, 06:10 UTC2h 5m
2026-07-24 ASA391 SAN → PDX Jul 24, 21:10 UTCJul 25, 02:05 UTC4h 55m
2026-07-24 ASA385 BOS → SEA Jul 24, 15:15 UTCJul 24, 19:10 UTC3h 55m
2026-07-23 ASA391 SAN → PDX Jul 23, 21:30 UTCJul 24, 02:20 UTC4h 50m
2026-07-23 ASA385 BOS → SEA Jul 23, 15:30 UTCJul 23, 19:25 UTC3h 55m
2026-07-23 ASA98 ADQ → ANC Jul 23, 10:15 UTCJul 23, 13:05 UTC2h 50m
2026-07-23 ASA1899 LAX → ANC Jul 23, 02:50 UTCJul 23, 07:45 UTC4h 55m
2026-07-22 ASA1419 GDL → LAX Jul 22, 23:20 UTCJul 23, 00:45 UTC1h 25m
2026-07-22 ASA1418 LAX → GDL Jul 22, 17:45 UTCJul 22, 19:10 UTC1h 25m
2026-07-22 ASA1418 LAX → GDL Jul 22, 17:44 UTCJul 22, 20:31 UTC2h 47m
2026-07-22 ASA287 EWR → LAX Jul 22, 01:14 UTCJul 22, 06:08 UTC4h 54m
2026-07-22 ASA287 - Jul 22, 01:05 UTCJul 22, 05:25 UTC4h 20m
2026-07-21 ASA477 LAX → SEA Jul 21, 18:30 UTCJul 21, 23:30 UTC5h 0m
2026-07-21 ASA409 IAD → SEA Jul 21, 10:15 UTCJul 21, 15:30 UTC5h 15m
2026-07-20 ASA406 IAD → SEA Jul 20, 23:35 UTCJul 21, 03:35 UTC3h 59m
2026-07-20 ASA1476 STL → PVR Jul 20, 20:15 UTCJul 20, 21:40 UTC1h 25m
2026-07-20 ASA1476 STL → PVR Jul 20, 20:14 UTCJul 20, 21:27 UTC1h 13m
2026-07-20 ASA1380 PDX → CUN Jul 20, 17:25 UTCJul 20, 18:55 UTC1h 30m
2026-07-20 ASA543 LAX → PDX Jul 20, 12:15 UTCJul 20, 15:40 UTC3h 25m
2026-07-20 ASA543 LAX → PDX Jul 20, 12:12 UTCJul 20, 15:29 UTC3h 17m
2026-07-20 ASA542 SEA → DFW Jul 20, 07:10 UTCJul 20, 10:30 UTC3h 20m
2026-07-20 ASA469 BNA → SEA Jul 20, 00:55 UTCJul 20, 05:30 UTC4h 35m
2026-07-19 ASA1376 PDX → PVR Jul 19, 18:15 UTCJul 19, 22:20 UTC4h 5m
2026-07-19 ASA679 SJC → PDX Jul 19, 15:25 UTCJul 19, 16:50 UTC1h 25m
2026-07-19 ASA1310 SFO → DAL Jul 19, 03:25 UTCJul 19, 05:15 UTC1h 50m
2026-07-18 ASA734 PHX → PAE Jul 18, 23:05 UTCJul 19, 00:35 UTC1h 30m
2026-07-18 ASA733 LAS → SEA Jul 18, 20:05 UTCJul 18, 21:40 UTC1h 35m
2026-07-18 ASA451 IAD → SFO Jul 18, 13:40 UTCJul 18, 18:05 UTC4h 25m
2026-07-18 ASA451 IAD → SFO Jul 18, 13:40 UTCJul 18, 17:53 UTC4h 13m
2026-07-18 ASA490 SEA → MSY Jul 18, 08:05 UTCJul 18, 12:15 UTC4h 10m
2026-07-18 ASA1681 LAS → SEA Jul 18, 03:40 UTCJul 18, 05:45 UTC2h 5m
2026-07-17 ASA600 SEA → LAS Jul 17, 23:50 UTCJul 18, 02:25 UTC2h 35m
2026-07-17 ASA415 DFW → SEA Jul 17, 18:44 UTCJul 17, 22:10 UTC3h 25m
2026-07-17 ASA414 SEA → DFW Jul 17, 13:35 UTCJul 17, 17:09 UTC3h 35m
2026-07-17 ASA17 JFK → SEA Jul 17, 01:05 UTCJul 17, 06:35 UTC5h 30m
2026-07-16 ASA18 - Jul 16, 23:15 UTCJul 16, 23:25 UTC10m
2026-07-16 ASA18 PDX → JFK Jul 16, 18:40 UTCJul 16, 23:25 UTC4h 45m
2026-07-16 ASA18 PDX → JFK Jul 16, 18:36 UTCJul 16, 22:57 UTC4h 21m
2026-07-16 ASA413 ORD → PDX Jul 16, 13:40 UTCJul 16, 17:20 UTC3h 40m
2026-07-16 ASA328 SEA → ORD Jul 16, 08:20 UTCJul 16, 11:50 UTC3h 30m
2026-07-16 ASA329 - Jul 16, 01:55 UTCJul 16, 05:45 UTC3h 50m
2026-07-15 ASA410 SEA → ORD Jul 15, 20:15 UTCJul 15, 23:55 UTC3h 40m
2026-07-15 ASA623 BNA → SEA Jul 15, 14:45 UTCJul 15, 18:45 UTC4h 0m
2026-07-15 ASA416 SEA → BNA Jul 15, 01:55 UTCJul 15, 05:55 UTC4h 0m
2026-07-15 ASA416 SEA → BNA Jul 15, 01:54 UTCJul 15, 05:46 UTC3h 52m

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 N284AK page for operator, model, and routing details .

Mode-S A2DCE1 frequently asked

What is Mode-S code A2DCE1?
A2DCE1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N284AK.
Where is Mode-S A2DCE1 registered?
Mode-S code A2DCE1 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 A2DCE1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2DCE1, octal 50556341, decimal 10,673,377.
What flights does A2DCE1 operate?
Mode-S A2DCE1 has broadcast 20 distinct callsigns, including ASA1418, ASA405, ASA637, ASA628, ASA391.