Apparatus

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sensors Mode-S transponder

A6C6C8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N536AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A6C6C8
Octal
51543310
Decimal
10,929,864
Country
US
Tail
N536AS
Type
B738
No current signal · last broadcast 5h ago
Flights observed
194
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A6C6C8.

Country allocation

The ICAO 24-bit address A6C6C8 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
ASA1321 Alaska Airlines 6 2026-05-26
ASA1489 Alaska Airlines 4 2026-05-03
ASA763 Alaska Airlines 3 2026-05-20
ASA660 Alaska Airlines 3 2026-05-11
ASA58 Alaska Airlines 3 2026-05-01
ASA314 Alaska Airlines 3 2026-04-27
ASA277 Alaska Airlines 3 2026-05-03
ASA213 Alaska Airlines 3 2026-05-16
ASA9669 Alaska Airlines 2 2026-04-30
ASA9430 Alaska Airlines 2 2026-04-14
ASA9410 Alaska Airlines 2 2026-04-20
ASA89 Alaska Airlines 2 2026-06-02
ASA765 Alaska Airlines 2 2026-04-24
ASA754 Alaska Airlines 2 2026-04-27
ASA740 Alaska Airlines 2 2026-05-28
ASA739 Alaska Airlines 2 2026-05-19
ASA733 Alaska Airlines 2 2026-04-23
ASA687 Alaska Airlines 2 2026-05-26
ASA686 Alaska Airlines 2 2026-05-25
ASA588 Alaska Airlines 2 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 ASA425 SFO → BOS Jun 5, 03:25 UTCJun 5, 04:45 UTC1h 20m
2026-06-05 ASA425 SFO → BOS Jun 5, 03:39 UTCJun 5, 04:44 UTC1h 5m
2026-06-05 ASA617 SEA → OAK Jun 5, 00:40 UTCJun 5, 01:55 UTC1h 15m
2026-06-04 ASA1412 SJD → SEA Jun 4, 22:35 UTCJun 4, 23:15 UTC40m
2026-06-04 ASA1485 BOS → SAN Jun 4, 20:40 UTCJun 4, 21:25 UTC45m
2026-06-04 ASA232 SEA → SJC Jun 4, 17:45 UTCJun 4, 18:25 UTC40m
2026-06-04 ASA231 LAS → SFO Jun 4, 16:25 UTCJun 4, 17:05 UTC40m
2026-06-03 ASA51 ANC → BRW Jun 3, 22:20 UTCJun 4, 02:35 UTC4h 15m
2026-06-03 ASA332 SJC → SEA Jun 3, 19:40 UTCJun 3, 21:00 UTC1h 20m
2026-06-03 ASA225 BUR → PDX Jun 3, 17:15 UTCJun 3, 18:30 UTC1h 15m
2026-06-03 ASA224 ANC → PHX Jun 3, 15:00 UTCJun 3, 15:45 UTC45m
2026-06-03 ASA224 ANC → PHX Jun 3, 14:57 UTCJun 3, 15:38 UTC41m
2026-06-03 ASA431 LAX → SEA Jun 3, 02:25 UTCJun 3, 03:05 UTC40m
2026-06-02 ASA88 ADQ → ANC Jun 2, 23:40 UTCJun 3, 00:20 UTC40m
2026-06-02 ASA89 ANC → ADQ Jun 2, 21:40 UTCJun 2, 22:25 UTC45m
2026-06-02 ASA89 ANC → ADQ Jun 2, 21:39 UTCJun 2, 22:23 UTC44m
2026-06-02 ASA743 SFO → OGG Jun 2, 13:25 UTCJun 2, 19:15 UTC5h 50m
2026-06-02 ASA1493 SAN → ORD Jun 2, 00:55 UTCJun 2, 04:25 UTC3h 30m
2026-06-01 ASA1447 PDX → SJC Jun 1, 19:25 UTCJun 1, 23:20 UTC3h 55m
2026-06-01 ASA1495 SAN → ORD Jun 1, 14:30 UTCJun 1, 17:32 UTC3h 2m
2026-06-01 ASA1495 SAN → ORD Jun 1, 14:10 UTCJun 1, 17:35 UTC3h 25m
2026-05-31 ASA389 SAN → SJC May 31, 23:30 UTCJun 1, 05:25 UTC5h 55m
2026-05-31 ASA358 PDX → BOS May 31, 15:50 UTCMay 31, 21:05 UTC5h 15m
2026-05-30 ASA646 PDX → PHX May 30, 23:20 UTCMay 31, 00:55 UTC1h 35m
2026-05-30 ASA392 PDX → DFW May 30, 18:00 UTCMay 30, 21:25 UTC3h 25m
2026-05-30 ASA750 SNA → PDX May 30, 14:15 UTCMay 30, 16:25 UTC2h 10m
2026-05-30 ASA1387 PVR → SFO May 30, 03:00 UTCMay 30, 05:20 UTC2h 20m
2026-05-29 ASA612 SEA → LAS May 29, 22:25 UTCMay 30, 01:40 UTC3h 15m
2026-05-29 ASA782 SFO → PVR May 29, 18:10 UTCMay 29, 21:20 UTC3h 10m
2026-05-29 ASA1341 SJD → LAX May 29, 15:05 UTCMay 29, 16:35 UTC1h 30m
2026-05-29 ASA1350 SEA → SFO May 29, 04:15 UTCMay 29, 05:35 UTC1h 20m
2026-05-28 ASA740 SFO → LAS May 28, 23:40 UTCMay 29, 03:10 UTC3h 30m
2026-05-28 ASA740 SFO → LAS May 28, 18:50 UTCMay 28, 22:15 UTC3h 25m
2026-05-28 ASA1341 SJD → LAX May 28, 15:00 UTCMay 28, 16:30 UTC1h 30m
2026-05-28 ASA761 SEA → SJC May 28, 04:35 UTCMay 28, 06:10 UTC1h 35m
2026-05-27 ASA494 SEA → SAT May 27, 23:25 UTCMay 28, 03:00 UTC3h 35m
2026-05-27 ASA494 SEA → SAT May 27, 18:20 UTCMay 27, 22:05 UTC3h 45m
2026-05-27 ASA515 BOS → PDX May 27, 13:00 UTCMay 27, 16:50 UTC3h 50m
2026-05-27 ASA328 SEA → ORD May 27, 07:15 UTCMay 27, 10:50 UTC3h 35m
2026-05-26 ASA553 IAD → SFO May 26, 23:49 UTCMay 27, 04:55 UTC5h 5m
2026-05-26 ASA1321 SEA → STS May 26, 20:20 UTCMay 26, 21:44 UTC1h 25m
2026-05-26 ASA1321 SEA → STS May 26, 17:20 UTCMay 26, 18:45 UTC1h 25m
2026-05-26 ASA687 LAS → PDX May 26, 02:35 UTCMay 26, 05:00 UTC2h 25m
2026-05-26 ASA687 LAS → PDX May 26, 02:35 UTCMay 26, 04:38 UTC2h 3m
2026-05-25 ASA686 SFO → LAS May 25, 23:35 UTCMay 26, 01:24 UTC1h 49m
2026-05-25 ASA686 SFO → LAS May 25, 23:19 UTCMay 26, 01:24 UTC2h 5m
2026-05-25 ASA1321 SEA → STS May 25, 20:15 UTCMay 25, 21:45 UTC1h 30m
2026-05-25 ASA1321 SEA → STS May 25, 17:20 UTCMay 25, 18:50 UTC1h 30m
2026-05-25 ASA607 TPA → SFO May 25, 13:05 UTCMay 25, 15:25 UTC2h 20m
2026-05-25 ASA271 SFO → PDX May 25, 04:20 UTCMay 25, 05:15 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 N536AS page for operator, model, and routing details .

Mode-S A6C6C8 frequently asked

What is Mode-S code A6C6C8?
A6C6C8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N536AS.
Where is Mode-S A6C6C8 registered?
Mode-S code A6C6C8 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 A6C6C8 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6C6C8, octal 51543310, decimal 10,929,864.
What flights does A6C6C8 operate?
Mode-S A6C6C8 has broadcast 20 distinct callsigns, including ASA1321, ASA1489, ASA763, ASA660, ASA58.