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 2h ago
Flights observed
267
Distinct callsigns
20
Country
US
Last broadcast
2h 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
ASA7 Alaska Airlines 6 2026-06-09
ASA1321 - 6 2026-06-30
ASA588 - 5 2026-07-04
ASA1629 - 5 2026-06-24
ASA1325 Alaska Airlines 5 2026-06-14
ASA88 Alaska Airlines 4 2026-06-07
ASA712 - 4 2026-07-04
ASA425 Alaska Airlines 4 2026-06-08
ASA400 - 4 2026-07-01
ASA225 Alaska Airlines 4 2026-05-12
ASA89 Alaska Airlines 3 2026-06-07
ASA8 Alaska Airlines 3 2026-06-09
ASA704 - 3 2026-06-24
ASA70 Alaska Airlines 3 2026-05-10
ASA699 Alaska Airlines 3 2026-05-30
ASA631 Alaska Airlines 3 2026-06-14
ASA469 - 3 2026-06-17
ASA36 Alaska Airlines 3 2026-06-12
ASA316 Alaska Airlines 3 2026-06-03
ASA23 Alaska Airlines 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-05 ASA1524 DTW → SEA Jul 5, 00:40 UTCJul 5, 01:30 UTC50m
2026-07-04 ASA712 - Jul 4, 21:05 UTCJul 4, 23:00 UTC1h 55m
2026-07-04 ASA588 - Jul 4, 17:50 UTCJul 4, 19:55 UTC2h 5m
2026-07-04 ASA1641 RNO → PDX Jul 4, 15:05 UTCJul 4, 16:15 UTC1h 10m
2026-07-04 ASA1616 PDX → RNO Jul 4, 01:05 UTCJul 4, 01:50 UTC45m
2026-07-02 ASA1434 SJC → SJD Jul 2, 23:30 UTCJul 3, 02:45 UTC3h 15m
2026-07-02 ASA509 SEA → MSP Jul 2, 19:25 UTCJul 2, 22:15 UTC2h 50m
2026-07-02 ASA1 DCA → SEA Jul 2, 12:20 UTCJul 2, 17:40 UTC5h 20m
2026-07-01 ASA2 SEA → DCA Jul 1, 21:15 UTCJul 2, 01:50 UTC4h 35m
2026-07-01 ASA1311 SJC → SEA Jul 1, 17:25 UTCJul 1, 19:10 UTC1h 45m
2026-07-01 ASA1448 SEA → SJC Jul 1, 14:10 UTCJul 1, 15:55 UTC1h 45m
2026-07-01 ASA400 SBA → SEA Jul 1, 02:40 UTCJul 1, 04:50 UTC2h 10m
2026-06-30 ASA400 SEA → SBA Jun 30, 23:45 UTCJul 1, 01:40 UTC1h 55m
2026-06-30 ASA1322 STS → SEA Jun 30, 20:15 UTCJun 30, 21:55 UTC1h 40m
2026-06-30 ASA1321 - Jun 30, 17:10 UTCJun 30, 18:35 UTC1h 25m
2026-06-30 ASA715 ORD → SEA Jun 30, 11:05 UTCJun 30, 15:00 UTC3h 55m
2026-06-30 ASA538 SEA → ORD Jun 30, 01:04 UTCJun 30, 04:35 UTC3h 31m
2026-06-29 ASA23 PHL → SEA Jun 29, 17:24 UTCJun 29, 22:39 UTC5h 15m
2026-06-29 ASA23 PHL → SEA Jun 29, 17:23 UTCJun 29, 22:31 UTC5h 8m
2026-06-28 ASA16 SEA → JFK Jun 28, 21:34 UTCJun 29, 02:35 UTC5h 0m
2026-06-28 ASA275 FAI → SEA Jun 28, 16:17 UTCJun 28, 19:21 UTC3h 4m
2026-06-28 ASA275 FAI → SEA Jun 28, 16:09 UTCJun 28, 19:25 UTC3h 15m
2026-06-28 ASA1521 PDX → FAI Jun 28, 05:15 UTCJun 28, 08:39 UTC3h 25m
2026-06-27 ASA1319 BOS → PDX Jun 27, 21:34 UTCJun 28, 03:50 UTC6h 15m
2026-06-27 ASA390 - Jun 27, 14:29 UTCJun 27, 19:55 UTC5h 25m
2026-06-27 ASA336 PDX → FLL Jun 27, 03:40 UTCJun 27, 05:44 UTC2h 5m
2026-06-26 ASA652 - Jun 26, 22:10 UTCJun 27, 00:14 UTC2h 5m
2026-06-26 ASA633 - Jun 26, 18:44 UTCJun 26, 20:24 UTC1h 40m
2026-06-26 ASA651 PHX → SEA Jun 26, 15:10 UTCJun 26, 17:00 UTC1h 50m
2026-06-26 ASA91 - Jun 26, 05:19 UTCJun 26, 06:54 UTC1h 35m
2026-06-26 ASA1508 - Jun 26, 00:05 UTCJun 26, 03:29 UTC3h 25m
2026-06-26 ASA1508 FAI → SEA Jun 26, 00:03 UTCJun 26, 03:15 UTC3h 12m
2026-06-25 ASA1507 SEA → FAI Jun 25, 19:44 UTCJun 25, 22:49 UTC3h 5m
2026-06-25 ASA215 AUS → SEA Jun 25, 13:55 UTCJun 25, 18:04 UTC4h 10m
2026-06-25 ASA1370 PDX → AUS Jun 25, 00:59 UTCJun 25, 04:29 UTC3h 30m
2026-06-24 ASA712 - Jun 24, 21:29 UTCJun 24, 23:34 UTC2h 5m
2026-06-24 ASA588 - Jun 24, 17:40 UTCJun 24, 19:49 UTC2h 10m
2026-06-24 ASA1629 LAS → PDX Jun 24, 14:15 UTCJun 24, 15:59 UTC1h 45m
2026-06-24 ASA704 - Jun 24, 03:50 UTCJun 24, 05:49 UTC2h 0m
2026-06-24 ASA698 LAS → SEA Jun 24, 00:15 UTCJun 24, 02:24 UTC2h 10m
2026-06-23 ASA738 LAS → SEA Jun 23, 19:24 UTCJun 23, 21:29 UTC2h 5m
2026-06-23 ASA427 PDX → SEA Jun 23, 17:09 UTCJun 23, 17:39 UTC30m
2026-06-23 ASA427 PDX → SEA Jun 23, 17:09 UTCJun 23, 17:25 UTC16m
2026-06-23 ASA525 - Jun 23, 02:24 UTCJun 23, 03:39 UTC1h 15m
2026-06-23 ASA1610 LAX → SFO Jun 23, 00:15 UTCJun 23, 01:15 UTC1h 0m
2026-06-23 ASA1610 LAX → SFO Jun 23, 00:09 UTCJun 23, 01:05 UTC56m
2026-06-22 ASA1604 SFO → LAX Jun 22, 21:35 UTCJun 22, 22:34 UTC1h 0m
2026-06-22 ASA227 JFK → SFO Jun 22, 14:29 UTCJun 22, 20:24 UTC5h 55m
2026-06-22 ASA22 - Jun 22, 06:35 UTCJun 22, 11:14 UTC4h 40m
2026-06-22 ASA22 SEA → JFK Jun 22, 06:31 UTCJun 22, 10:57 UTC4h 26m

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 2h 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 ASA7, ASA1321, ASA588, ASA1629, ASA1325.