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sensors Mode-S transponder

A2F95C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N291BT · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
A2F95C
Octal
50574534
Decimal
10,680,668
Country
US
Tail
N291BT
Type
B39M
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
439
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S A2F95C.

Country allocation

The ICAO 24-bit address A2F95C 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
ASA737 Alaska Airlines 9 2026-07-06
ASA682 - 6 2026-07-11
ASA569 Alaska Airlines 6 2026-05-22
ASA568 Alaska Airlines 5 2026-04-27
ASA1301 Alaska Airlines 5 2026-04-25
ASA786 Alaska Airlines 4 2026-07-23
ASA779 Alaska Airlines 4 2026-07-25
ASA684 Alaska Airlines 4 2026-06-04
ASA555 - 4 2026-06-28
ASA538 Alaska Airlines 4 2026-04-15
ASA450 - 4 2026-07-09
ASA421 Alaska Airlines 4 2026-07-23
ASA370 Alaska Airlines 4 2026-04-14
ASA233 - 4 2026-06-29
ASA1523 - 4 2026-07-12
ASA1358 Alaska Airlines 4 2026-05-25
ASA781 Alaska Airlines 3 2026-07-23
ASA776 Alaska Airlines 3 2026-07-25
ASA742 - 3 2026-06-27
ASA680 - 3 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1476 STL → PVR Jul 26, 20:35 UTCJul 26, 22:00 UTC1h 25m
2026-07-26 ASA1380 PDX → CUN Jul 26, 17:55 UTCJul 26, 19:20 UTC1h 25m
2026-07-26 ASA283 EWR → PDX Jul 26, 11:25 UTCJul 26, 16:05 UTC4h 40m
2026-07-26 ASA280 EWR → SEA Jul 26, 06:15 UTCJul 26, 09:50 UTC3h 36m
2026-07-25 ASA469 BOS → PDX Jul 25, 23:15 UTCJul 26, 03:50 UTC4h 35m
2026-07-25 ASA1376 PDX → PVR Jul 25, 17:55 UTCJul 25, 21:35 UTC3h 40m
2026-07-25 ASA779 LAS → PDX Jul 25, 03:55 UTCJul 25, 05:30 UTC1h 35m
2026-07-25 ASA779 LAS → PDX Jul 25, 03:49 UTCJul 25, 05:32 UTC1h 43m
2026-07-25 ASA776 LAS → SFO Jul 25, 00:50 UTCJul 25, 02:00 UTC1h 10m
2026-07-24 ASA41 MCO → SFO Jul 24, 16:05 UTCJul 24, 21:45 UTC5h 40m
2026-07-24 ASA211 CUN → SEA Jul 24, 04:55 UTCJul 24, 09:45 UTC4h 50m
2026-07-24 ASA1379 SFO → PVR Jul 24, 01:30 UTCJul 24, 02:45 UTC1h 15m
2026-07-23 ASA421 PDX → SFO Jul 23, 19:01 UTCJul 23, 23:06 UTC4h 5m
2026-07-23 ASA421 PDX → SFO Jul 23, 19:05 UTCJul 23, 21:00 UTC1h 55m
2026-07-23 ASA786 SEA → RDM Jul 23, 11:55 UTCJul 23, 17:15 UTC5h 20m
2026-07-23 ASA786 SEA → RDM Jul 23, 11:51 UTCJul 23, 16:56 UTC5h 5m
2026-07-23 ASA781 SNA → SEA Jul 23, 05:25 UTCJul 23, 09:40 UTC4h 15m
2026-07-23 ASA510 PDX → BNA Jul 23, 00:25 UTCJul 23, 03:50 UTC3h 25m
2026-07-22 ASA1429 SJD → SFO Jul 22, 18:35 UTCJul 22, 21:20 UTC2h 45m
2026-07-22 ASA562 SFO → LAS Jul 22, 14:05 UTCJul 22, 15:50 UTC1h 45m
2026-07-22 ASA559 SFO → SEA Jul 22, 01:10 UTCJul 22, 03:15 UTC2h 5m
2026-07-21 ASA1315 LAX → PDX Jul 21, 22:00 UTCJul 21, 23:45 UTC1h 45m
2026-07-21 ASA695 SJC → PDX Jul 21, 18:14 UTCJul 21, 20:00 UTC1h 46m
2026-07-21 ASA695 SJC → PDX Jul 21, 18:15 UTCJul 21, 19:00 UTC45m
2026-07-21 ASA679 - Jul 21, 15:00 UTCJul 21, 16:20 UTC1h 20m
2026-07-21 ASA1624 - Jul 21, 06:25 UTCJul 21, 07:25 UTC1h 0m
2026-07-21 ASA397 MCO → SAN Jul 21, 00:10 UTCJul 21, 04:30 UTC4h 20m
2026-07-20 ASA396 - Jul 20, 17:45 UTCJul 20, 22:20 UTC4h 35m
2026-07-20 ASA1680 SMF → SAN Jul 20, 14:45 UTCJul 20, 15:55 UTC1h 10m
2026-07-20 ASA1427 PVR → SFO Jul 20, 04:10 UTCJul 20, 05:35 UTC1h 25m
2026-07-19 ASA226 SJC → GDL Jul 19, 23:00 UTCJul 20, 02:10 UTC3h 10m
2026-07-19 ASA433 IAD → SFO Jul 19, 18:20 UTCJul 19, 21:25 UTC3h 5m
2026-07-19 ASA9809 BOS → SFO Jul 19, 09:55 UTCJul 19, 15:15 UTC5h 20m
2026-07-18 ASA781 SEA → BWI Jul 18, 05:05 UTCJul 18, 09:40 UTC4h 35m
2026-07-17 ASA412 SEA → PIT Jul 17, 22:45 UTCJul 18, 03:25 UTC4h 41m
2026-07-17 ASA412 SEA → PIT Jul 17, 17:25 UTCJul 17, 21:30 UTC4h 5m
2026-07-17 ASA1473 - Jul 17, 13:40 UTCJul 17, 15:49 UTC2h 10m
2026-07-17 ASA1398 SEA → SAN Jul 17, 04:14 UTCJul 17, 06:45 UTC2h 30m
2026-07-16 ASA500 - Jul 16, 22:15 UTCJul 17, 02:20 UTC4h 5m
2026-07-16 ASA500 SEA → IND Jul 16, 17:20 UTCJul 16, 21:00 UTC3h 40m
2026-07-16 ASA563 - Jul 16, 11:10 UTCJul 16, 14:20 UTC3h 10m
2026-07-16 ASA564 - Jul 16, 01:45 UTCJul 16, 04:50 UTC3h 5m
2026-07-15 ASA652 - Jul 15, 22:20 UTCJul 16, 00:20 UTC2h 0m
2026-07-15 ASA633 - Jul 15, 19:00 UTCJul 15, 20:45 UTC1h 45m
2026-07-15 ASA519 - Jul 15, 12:25 UTCJul 15, 16:05 UTC3h 40m
2026-07-15 ASA520 - Jul 15, 06:45 UTCJul 15, 10:25 UTC3h 40m
2026-07-14 ASA517 - Jul 14, 23:05 UTCJul 15, 04:40 UTC5h 35m
2026-07-14 ASA516 SEA → FLL Jul 14, 16:05 UTCJul 14, 21:40 UTC5h 35m
2026-07-14 ASA499 PDX → SEA Jul 14, 13:40 UTCJul 14, 14:10 UTC30m
2026-07-13 ASA1421 - Jul 13, 23:40 UTCJul 14, 03:25 UTC3h 45m

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 N291BT page for operator, model, and routing details .

Mode-S A2F95C frequently asked

What is Mode-S code A2F95C?
A2F95C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N291BT.
Where is Mode-S A2F95C registered?
Mode-S code A2F95C 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 A2F95C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2F95C, octal 50574534, decimal 10,680,668.
What flights does A2F95C operate?
Mode-S A2F95C has broadcast 20 distinct callsigns, including ASA737, ASA682, ASA569, ASA568, ASA1301.