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sensors Mode-S transponder

A3133C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N298AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A3133C
Octal
50611474
Decimal
10,687,292
Country
US
Tail
N298AK
Type
B739
No current signal · last broadcast 2h ago
Flights observed
370
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A3133C.

Country allocation

The ICAO 24-bit address A3133C 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
ASA300 Alaska Airlines 6 2026-04-25
ASA611 - 5 2026-07-01
ASA412 Alaska Airlines 5 2026-06-10
ASA405 Alaska Airlines 5 2026-07-09
ASA247 Alaska Airlines 5 2026-06-03
ASA106 Alaska Airlines 5 2026-04-18
ASA497 Alaska Airlines 4 2026-06-04
ASA48 Alaska Airlines 4 2026-06-03
ASA419 Alaska Airlines 4 2026-04-16
ASA799 - 3 2026-04-16
ASA674 Alaska Airlines 3 2026-04-21
ASA673 Alaska Airlines 3 2026-06-16
ASA612 - 3 2026-07-12
ASA584 - 3 2026-04-14
ASA565 Alaska Airlines 3 2026-05-27
ASA543 Alaska Airlines 3 2026-06-29
ASA527 Alaska Airlines 3 2026-05-14
ASA514 - 3 2026-06-30
ASA459 Alaska Airlines 3 2026-06-13
ASA442 Alaska Airlines 3 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASA1396 AUS → PDX Jul 13, 23:50 UTCJul 14, 03:15 UTC3h 25m
2026-07-13 ASA540 - Jul 13, 18:05 UTCJul 13, 21:50 UTC3h 45m
2026-07-13 ASA311 BOS → PDX Jul 13, 10:30 UTCJul 13, 15:50 UTC5h 20m
2026-07-12 ASA460 SEA → BOS Jul 12, 23:00 UTCJul 13, 03:55 UTC4h 55m
2026-07-12 ASA785 LAS → SEA Jul 12, 18:40 UTCJul 12, 20:35 UTC1h 55m
2026-07-12 ASA612 SEA → LAS Jul 12, 15:01 UTCJul 12, 17:10 UTC2h 10m
2026-07-11 ASA1338 SFO → SEA Jul 11, 14:10 UTCJul 11, 22:05 UTC7h 55m
2026-07-11 ASA791 - Jul 11, 01:00 UTCJul 11, 02:55 UTC1h 55m
2026-07-10 ASA286 SEA → SEA Jul 10, 18:45 UTCJul 10, 22:45 UTC4h 0m
2026-07-10 ASA1426 LAX → ZIH Jul 10, 15:30 UTCJul 10, 17:20 UTC1h 50m
2026-07-10 ASA539 SEA → SJC Jul 10, 01:00 UTCJul 10, 02:45 UTC1h 45m
2026-07-09 ASA405 SEA → OKC Jul 9, 20:05 UTCJul 9, 23:35 UTC3h 30m
2026-07-09 ASA405 SEA → OKC Jul 9, 15:50 UTCJul 9, 18:50 UTC3h 0m
2026-07-09 ASA279 GEG → SEA Jul 9, 13:20 UTCJul 9, 14:00 UTC40m
2026-07-09 ASA1356 PDX → GEG Jul 9, 05:00 UTCJul 9, 05:50 UTC50m
2026-07-08 ASA290 - Jul 8, 21:20 UTCJul 9, 02:35 UTC5h 15m
2026-07-08 ASA294 PDX → EWR Jul 8, 14:55 UTCJul 8, 19:40 UTC4h 45m
2026-07-08 ASA609 LAX → PDX Jul 8, 09:40 UTCJul 8, 12:45 UTC3h 5m
2026-07-08 ASA271 PDX → ANC Jul 8, 01:10 UTCJul 8, 04:19 UTC3h 9m
2026-07-08 ASA271 PDX → ANC Jul 8, 01:10 UTCJul 8, 04:25 UTC3h 15m
2026-07-07 ASA1402 - Jul 7, 21:20 UTCJul 7, 23:15 UTC1h 55m
2026-07-07 ASA467 - Jul 7, 17:30 UTCJul 7, 19:50 UTC2h 20m
2026-07-07 ASA467 SEA → SAN Jul 7, 17:29 UTCJul 7, 19:49 UTC2h 20m
2026-07-07 ASA409 IAD → SEA Jul 7, 10:20 UTCJul 7, 15:15 UTC4h 55m
2026-07-06 ASA406 SEA → IAD Jul 6, 23:40 UTCJul 7, 04:15 UTC4h 35m
2026-07-06 ASA1476 SMF → SEA Jul 6, 20:19 UTCJul 6, 21:44 UTC1h 25m
2026-07-06 ASA1476 - Jul 6, 20:20 UTCJul 6, 21:00 UTC40m
2026-07-06 ASA1380 SEA → SMF Jul 6, 17:15 UTCJul 6, 18:45 UTC1h 30m
2026-07-06 ASA344 - Jul 6, 11:30 UTCJul 6, 15:40 UTC4h 10m
2026-07-06 ASA343 - Jul 6, 05:35 UTCJul 6, 09:20 UTC3h 45m
2026-07-06 ASA758 - Jul 6, 01:15 UTCJul 6, 02:45 UTC1h 30m
2026-07-05 ASA236 PDX → SFO Jul 5, 22:05 UTCJul 5, 23:40 UTC1h 35m
2026-07-05 ASA684 DEN → PDX Jul 5, 18:15 UTCJul 5, 20:35 UTC2h 20m
2026-07-05 ASA401 PDX → DEN Jul 5, 14:35 UTCJul 5, 16:40 UTC2h 5m
2026-07-04 ASA207 - Jul 4, 06:50 UTCJul 4, 08:50 UTC2h 0m
2026-07-04 ASA278 PDX → LAX Jul 4, 00:50 UTCJul 4, 02:50 UTC2h 0m
2026-07-03 ASA229 - Jul 3, 22:35 UTCJul 3, 23:30 UTC55m
2026-07-03 ASA441 MSY → SEA Jul 3, 20:05 UTCJul 3, 21:00 UTC55m
2026-07-03 ASA47 ORD → ANC Jul 3, 15:05 UTCJul 3, 18:00 UTC2h 55m
2026-07-03 ASA1363 SEA → ANC Jul 3, 07:00 UTCJul 3, 10:10 UTC3h 10m
2026-07-03 ASA614 LAX → SEA Jul 3, 03:36 UTCJul 3, 05:24 UTC1h 48m
2026-07-03 ASA614 - Jul 3, 03:20 UTCJul 3, 05:35 UTC2h 15m
2026-07-02 ASA1300 - Jul 2, 23:25 UTCJul 3, 01:30 UTC2h 5m
2026-07-02 ASA1476 SMF → SEA Jul 2, 20:05 UTCJul 2, 21:45 UTC1h 40m
2026-07-02 ASA1380 SEA → SMF Jul 2, 17:25 UTCJul 2, 18:45 UTC1h 20m
2026-07-02 ASA1380 SEA → SMF Jul 2, 17:23 UTCJul 2, 18:42 UTC1h 19m
2026-07-02 ASA283 - Jul 2, 11:20 UTCJul 2, 15:35 UTC4h 15m
2026-07-02 ASA283 CMH → SEA Jul 2, 11:15 UTCJul 2, 15:26 UTC4h 11m
2026-07-02 ASA280 SEA → CMH Jul 2, 05:30 UTCJul 2, 09:30 UTC4h 0m
2026-07-01 ASA611 PHX → SEA Jul 1, 02:10 UTCJul 1, 04:40 UTC2h 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 N298AK page for operator, model, and routing details .

Mode-S A3133C frequently asked

What is Mode-S code A3133C?
A3133C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N298AK.
Where is Mode-S A3133C registered?
Mode-S code A3133C 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 A3133C broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3133C, octal 50611474, decimal 10,687,292.
What flights does A3133C operate?
Mode-S A3133C has broadcast 20 distinct callsigns, including ASA300, ASA611, ASA412, ASA405, ASA247.