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sensors Mode-S transponder

A6F5B5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N548AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A6F5B5
Octal
51572665
Decimal
10,941,877
Country
US
Tail
N548AS
Type
B738
Broadcasting now · callsign ASA1336 · 35,525 ft
Flights observed
267
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 05:40 UTC

Current position

A6F5B5 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A6F5B5 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
ASA66 Alaska Airlines 9 2026-04-26
ASA658 Alaska Airlines 7 2026-07-24
ASA757 Alaska Airlines 5 2026-04-27
ASA89 Alaska Airlines 4 2026-07-25
ASA88 Alaska Airlines 4 2026-07-26
ASA69 Alaska Airlines 4 2026-05-05
ASA67 Alaska Airlines 4 2026-05-01
ASA1319 Alaska Airlines 4 2026-04-16
ASA676 Alaska Airlines 3 2026-05-06
ASA358 Alaska Airlines 3 2026-04-15
ASA219 Alaska Airlines 3 2026-05-03
ASA1524 Alaska Airlines 3 2026-05-10
ASA1495 Alaska Airlines 3 2026-04-25
ASA137 Alaska Airlines 3 2026-04-19
ASA9431 - 2 2026-07-07
ASA9421 Alaska Airlines 2 2026-05-17
ASA9412 - 2 2026-07-08
ASA791 - 2 2026-07-17
ASA790 - 2 2026-07-16
ASA776 - 2 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1518 SAN → ORD Jul 26, 02:15 UTCJul 26, 05:20 UTC3h 5m
2026-07-26 ASA88 ADQ → ANC Jul 26, 00:00 UTCJul 26, 00:40 UTC40m
2026-07-25 ASA89 ANC → ADQ Jul 25, 22:10 UTCJul 25, 22:50 UTC40m
2026-07-25 ASA1528 SEA → BUR Jul 25, 19:35 UTCJul 25, 20:50 UTC1h 15m
2026-07-25 ASA1527 ANC → OTZ Jul 25, 17:25 UTCJul 25, 18:40 UTC1h 15m
2026-07-25 ASA1637 LAS → ANC Jul 25, 00:05 UTCJul 25, 04:45 UTC4h 40m
2026-07-24 ASA658 SEA → PHX Jul 24, 20:20 UTCJul 24, 21:15 UTC55m
2026-07-24 ASA658 SEA → PHX Jul 24, 20:28 UTCJul 24, 22:24 UTC1h 56m
2026-07-24 ASA365 SFO → LAS Jul 24, 14:20 UTCJul 24, 18:00 UTC3h 40m
2026-07-24 ASA424 SEA → BOS Jul 24, 01:40 UTCJul 24, 04:55 UTC3h 15m
2026-07-23 ASA330 CLE → SEA Jul 23, 21:00 UTCJul 23, 23:35 UTC2h 35m
2026-07-23 ASA327 SJC → SEA Jul 23, 17:05 UTCJul 23, 19:30 UTC2h 25m
2026-07-23 ASA701 LAS → SEA Jul 23, 13:05 UTCJul 23, 15:15 UTC2h 10m
2026-07-23 ASA704 OGG → SFO Jul 23, 04:05 UTCJul 23, 06:15 UTC2h 10m
2026-07-23 ASA704 OGG → SFO Jul 23, 04:03 UTCJul 23, 06:07 UTC2h 4m
2026-07-22 ASA500 IND → SEA Jul 22, 21:50 UTCJul 23, 02:10 UTC4h 20m
2026-07-22 ASA500 IND → SEA Jul 22, 16:45 UTCJul 22, 20:10 UTC3h 25m
2026-07-22 ASA400 SEA → BNA Jul 22, 02:40 UTCJul 22, 04:35 UTC1h 55m
2026-07-21 ASA400 SEA → BNA Jul 21, 23:35 UTCJul 22, 01:45 UTC2h 10m
2026-07-21 ASA1476 STL → PVR Jul 21, 20:50 UTCJul 21, 22:10 UTC1h 20m
2026-07-21 ASA1380 PDX → CUN Jul 21, 18:20 UTCJul 21, 19:45 UTC1h 25m
2026-07-21 ASA283 EWR → PDX Jul 21, 11:20 UTCJul 21, 16:05 UTC4h 45m
2026-07-21 ASA280 EWR → SEA Jul 21, 05:40 UTCJul 21, 09:15 UTC3h 35m
2026-07-21 ASA280 EWR → SEA Jul 21, 05:36 UTCJul 21, 09:10 UTC3h 34m
2026-07-21 ASA1508 AUS → PDX Jul 21, 00:05 UTCJul 21, 03:15 UTC3h 10m
2026-07-21 ASA1508 AUS → PDX Jul 21, 00:10 UTCJul 21, 03:20 UTC3h 10m
2026-07-20 ASA1507 DFW → SEA Jul 20, 19:45 UTCJul 20, 22:45 UTC3h 0m
2026-07-20 ASA1533 PDX → SJC Jul 20, 15:30 UTCJul 20, 17:35 UTC2h 5m
2026-07-20 ASA1559 SEA → JNU Jul 20, 03:40 UTCJul 20, 05:35 UTC1h 55m
2026-07-19 ASA510 MSP → SEA Jul 19, 22:31 UTCJul 20, 01:35 UTC3h 4m
2026-07-19 ASA510 - Jul 19, 22:10 UTCJul 19, 22:15 UTC5m
2026-07-19 ASA1429 SJD → SFO Jul 19, 18:00 UTCJul 19, 21:00 UTC3h 0m
2026-07-19 ASA1629 LAS → PDX Jul 19, 14:35 UTCJul 19, 16:25 UTC1h 50m
2026-07-19 ASA636 SEA → LAS Jul 19, 04:40 UTCJul 19, 06:50 UTC2h 10m
2026-07-18 ASA419 SFO → LAS Jul 18, 21:40 UTCJul 19, 03:05 UTC5h 25m
2026-07-18 ASA300 - Jul 18, 14:40 UTCJul 18, 19:55 UTC5h 15m
2026-07-18 ASA779 LAS → PDX Jul 18, 02:35 UTCJul 18, 04:15 UTC1h 41m
2026-07-17 ASA776 SFO → LAS Jul 17, 23:50 UTCJul 18, 01:10 UTC1h 20m
2026-07-17 ASA41 JFK → SFO Jul 17, 16:19 UTCJul 17, 21:44 UTC5h 25m
2026-07-17 ASA211 - Jul 17, 05:25 UTCJul 17, 10:30 UTC5h 5m
2026-07-17 ASA791 SEA → SFO Jul 17, 01:24 UTCJul 17, 03:10 UTC1h 46m
2026-07-17 ASA791 SEA → SFO Jul 17, 01:25 UTCJul 17, 03:25 UTC2h 0m
2026-07-16 ASA790 - Jul 16, 22:05 UTCJul 16, 23:40 UTC1h 35m
2026-07-16 ASA790 SFO → SEA Jul 16, 22:02 UTCJul 16, 23:25 UTC1h 23m
2026-07-16 ASA570 LAS → SFO Jul 16, 17:50 UTCJul 16, 18:53 UTC1h 3m
2026-07-16 ASA718 - Jul 16, 14:40 UTCJul 16, 15:49 UTC1h 10m
2026-07-16 ASA718 SFO → LAS Jul 16, 14:39 UTCJul 16, 15:43 UTC1h 4m
2026-07-15 ASA561 - Jul 15, 21:55 UTCJul 15, 22:55 UTC1h 0m
2026-07-15 ASA560 - Jul 15, 18:45 UTCJul 15, 19:55 UTC1h 10m
2026-07-15 ASA687 - Jul 15, 16:30 UTCJul 15, 17:25 UTC55m

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 N548AS page for operator, model, and routing details .

Mode-S A6F5B5 frequently asked

What is Mode-S code A6F5B5?
A6F5B5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N548AS.
Where is Mode-S A6F5B5 registered?
Mode-S code A6F5B5 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 A6F5B5 broadcasting right now?
Yes. Mode-S A6F5B5 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6F5B5, octal 51572665, decimal 10,941,877.
What flights does A6F5B5 operate?
Mode-S A6F5B5 has broadcast 20 distinct callsigns, including ASA66, ASA658, ASA757, ASA89, ASA88.