Apparatus

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sensors Mode-S transponder

A6A6B7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N528AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A6A6B7
Octal
51523267
Decimal
10,921,655
Country
US
Tail
N528AS
Type
B738
No current signal · last broadcast 23d ago
Flights observed
356
Distinct callsigns
20
Country
US
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S A6A6B7.

Country allocation

The ICAO 24-bit address A6A6B7 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
ASA1325 - 7 2026-07-12
ASA89 Alaska Airlines 6 2026-07-24
ASA7 Alaska Airlines 6 2026-06-09
ASA1321 - 6 2026-06-30
ASA588 - 5 2026-07-04
ASA431 Alaska Airlines 5 2026-07-26
ASA1629 - 5 2026-06-24
ASA88 Alaska Airlines 4 2026-06-07
ASA712 - 4 2026-07-04
ASA631 - 4 2026-07-12
ASA425 Alaska Airlines 4 2026-06-08
ASA400 - 4 2026-07-01
ASA336 Alaska Airlines 4 2026-07-21
ASA313 - 4 2026-07-08
ASA275 - 4 2026-07-17
ASA264 Alaska Airlines 4 2026-07-16
ASA225 Alaska Airlines 4 2026-05-12
ASA8 Alaska Airlines 3 2026-06-09
ASA704 - 3 2026-06-24
ASA70 Alaska Airlines 3 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA315 AUS → SEA Jul 26, 17:15 UTCJul 26, 20:20 UTC3h 5m
2026-07-26 ASA224 ANC → PHX Jul 26, 15:00 UTCJul 26, 15:45 UTC45m
2026-07-26 ASA431 LAX → SEA Jul 26, 02:35 UTCJul 26, 03:15 UTC40m
2026-07-25 ASA660 PAE → PHX Jul 25, 22:00 UTCJul 26, 01:00 UTC3h 0m
2026-07-25 ASA315 AUS → SEA Jul 25, 17:30 UTCJul 25, 20:30 UTC3h 0m
2026-07-25 ASA224 ANC → PHX Jul 25, 15:15 UTCJul 25, 15:55 UTC40m
2026-07-25 ASA431 LAX → SEA Jul 25, 02:35 UTCJul 25, 03:15 UTC40m
2026-07-25 ASA431 LAX → SEA Jul 25, 02:35 UTCJul 25, 03:18 UTC43m
2026-07-24 ASA89 ANC → ADQ Jul 24, 23:35 UTCJul 24, 23:40 UTC5m
2026-07-24 ASA89 ANC → ADQ Jul 24, 22:15 UTCJul 24, 23:40 UTC1h 25m
2026-07-24 ASA89 ANC → ADQ Jul 24, 22:20 UTCJul 24, 23:19 UTC59m
2026-07-24 ASA1810 FAI → ANC Jul 24, 17:35 UTCJul 24, 20:45 UTC3h 10m
2026-07-23 ASA3 DCA → SEA Jul 23, 21:20 UTCJul 24, 02:45 UTC5h 25m
2026-07-23 ASA3 DCA → SEA Jul 23, 21:29 UTCJul 24, 02:34 UTC5h 5m
2026-07-23 ASA10 PDX → DCA Jul 23, 15:05 UTCJul 23, 19:30 UTC4h 25m
2026-07-23 ASA10 PDX → DCA Jul 23, 15:14 UTCJul 23, 19:18 UTC4h 4m
2026-07-22 ASA9236 SJD → SEA Jul 22, 19:50 UTCJul 23, 01:30 UTC5h 40m
2026-07-22 ASA9234 SNA → SEA Jul 22, 17:10 UTCJul 22, 18:20 UTC1h 10m
2026-07-21 ASA390 SAN → BOS Jul 21, 14:40 UTCJul 21, 19:50 UTC5h 10m
2026-07-21 ASA336 PDX → FLL Jul 21, 02:35 UTCJul 21, 05:00 UTC2h 25m
2026-07-21 ASA336 PDX → FLL Jul 21, 02:37 UTCJul 21, 04:58 UTC2h 21m
2026-07-20 ASA1340 SJC → GDL Jul 20, 23:25 UTCJul 21, 00:50 UTC1h 24m
2026-07-20 ASA1522 SAN → SEA Jul 20, 20:55 UTCJul 20, 21:50 UTC55m
2026-07-20 ASA5 - Jul 20, 15:05 UTCJul 20, 19:35 UTC4h 30m
2026-07-19 ASA6 - Jul 19, 19:40 UTCJul 20, 00:20 UTC4h 40m
2026-07-19 ASA1329 OAK → SEA Jul 19, 16:05 UTCJul 19, 17:00 UTC55m
2026-07-19 ASA1625 - Jul 19, 13:10 UTCJul 19, 14:00 UTC50m
2026-07-19 ASA1389 - Jul 19, 04:45 UTCJul 19, 06:50 UTC2h 5m
2026-07-18 ASA783 ATL → PDX Jul 18, 22:15 UTCJul 19, 02:45 UTC4h 30m
2026-07-18 ASA334 LAX → PDX Jul 18, 16:35 UTCJul 18, 20:55 UTC4h 20m
2026-07-18 ASA774 - Jul 18, 00:50 UTCJul 18, 02:55 UTC2h 6m
2026-07-17 ASA773 - Jul 17, 21:10 UTCJul 17, 23:35 UTC2h 25m
2026-07-17 ASA275 - Jul 17, 16:15 UTCJul 17, 19:35 UTC3h 20m
2026-07-17 ASA275 FAI → SEA Jul 17, 16:10 UTCJul 17, 19:18 UTC3h 8m
2026-07-17 ASA1521 - Jul 17, 06:50 UTCJul 17, 10:10 UTC3h 20m
2026-07-17 ASA1521 PDX → FAI Jul 17, 06:49 UTCJul 17, 10:08 UTC3h 19m
2026-07-17 ASA589 - Jul 17, 01:25 UTCJul 17, 03:20 UTC1h 55m
2026-07-16 ASA264 PDX → SJC Jul 16, 22:05 UTCJul 17, 00:20 UTC2h 15m
2026-07-16 ASA576 - Jul 16, 18:25 UTCJul 16, 20:19 UTC1h 55m
2026-07-16 ASA577 PDX → SAN Jul 16, 14:55 UTCJul 16, 17:05 UTC2h 10m
2026-07-16 ASA577 PDX → SAN Jul 16, 14:49 UTCJul 16, 17:02 UTC2h 13m
2026-07-16 ASA589 - Jul 16, 01:30 UTCJul 16, 03:25 UTC1h 55m
2026-07-15 ASA264 - Jul 15, 22:00 UTCJul 16, 00:15 UTC2h 15m
2026-07-15 ASA1567 - Jul 15, 17:25 UTCJul 15, 20:45 UTC3h 20m
2026-07-15 ASA224 - Jul 15, 14:55 UTCJul 15, 15:35 UTC40m
2026-07-15 ASA431 ANC → ADQ Jul 15, 02:46 UTCJul 15, 03:18 UTC32m
2026-07-15 ASA431 ANC → ADQ Jul 15, 02:30 UTCJul 15, 03:15 UTC45m
2026-07-14 ASA660 SEA → ANC Jul 14, 22:00 UTCJul 15, 01:10 UTC3h 9m
2026-07-14 ASA471 - Jul 14, 17:35 UTCJul 14, 19:40 UTC2h 5m
2026-07-14 ASA1404 PDX → SNA Jul 14, 14:15 UTCJul 14, 16:30 UTC2h 15m

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 N528AS page for operator, model, and routing details .

Mode-S A6A6B7 frequently asked

What is Mode-S code A6A6B7?
A6A6B7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N528AS.
Where is Mode-S A6A6B7 registered?
Mode-S code A6A6B7 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 A6A6B7 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6A6B7, octal 51523267, decimal 10,921,655.
What flights does A6A6B7 operate?
Mode-S A6A6B7 has broadcast 20 distinct callsigns, including ASA1325, ASA89, ASA7, ASA1321, ASA588.