Apparatus

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sensors Mode-S transponder

A7F63D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N612AS · BOEING 737-700 · operated by ALASKA AIRLINES INC

Hex
A7F63D
Octal
51773075
Decimal
11,007,549
Country
US
Tail
N612AS
Type
B737
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
667
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S A7F63D.

Country allocation

The ICAO 24-bit address A7F63D 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
ASA65 - 76 2026-07-13
ASA66 - 46 2026-07-20
ASA61 Alaska Airlines 34 2026-07-26
ASA64 - 30 2026-07-16
ASA67 Alaska Airlines 20 2026-05-30
ASA62 Alaska Airlines 18 2026-06-01
ASA70 Alaska Airlines 15 2026-07-25
ASA272 - 15 2026-07-09
ASA60 - 14 2026-07-17
ASA73 Alaska Airlines 13 2026-07-25
ASA310 Alaska Airlines 11 2026-06-06
ASA69 - 10 2026-07-17
ASA71 - 9 2026-07-07
ASA1554 Alaska Airlines 9 2026-07-11
ASA87 Alaska Airlines 7 2026-07-21
ASA86 - 7 2026-07-20
ASA697 - 7 2026-07-17
ASA254 Alaska Airlines 7 2026-06-08
ASA1544 Alaska Airlines 7 2026-07-23
ASA55 Alaska Airlines 6 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA61 SEA → JNU Jul 26, 20:25 UTCJul 26, 21:00 UTC35m
2026-07-26 ASA61 SEA → JNU Jul 26, 19:10 UTCJul 26, 19:50 UTC40m
2026-07-26 ASA61 SEA → JNU Jul 26, 16:35 UTCJul 26, 18:25 UTC1h 50m
2026-07-26 ASA364 BOS → SEA Jul 26, 14:35 UTCJul 26, 15:20 UTC45m
2026-07-26 ASA350 LAX → IAD Jul 26, 06:30 UTCJul 26, 07:10 UTC41m
2026-07-26 ASA371 FLL → SFO Jul 26, 02:55 UTCJul 26, 03:40 UTC45m
2026-07-26 ASA1433 SJD → SFO Jul 26, 01:19 UTCJul 26, 01:41 UTC22m
2026-07-26 ASA1433 SJD → SFO Jul 26, 01:10 UTCJul 26, 01:50 UTC40m
2026-07-25 ASA1839 FAI → SEA Jul 25, 20:25 UTCJul 25, 23:40 UTC3h 15m
2026-07-25 73 ANC → FAI Jul 25, 18:20 UTCJul 25, 19:00 UTC40m
2026-07-25 73 - Jul 25, 15:40 UTCJul 25, 17:00 UTC1h 20m
2026-07-25 ASA73 JNU → ANC Jul 25, 14:15 UTCJul 25, 14:30 UTC15m
2026-07-25 ASA70 ANC → JNU Jul 25, 06:10 UTCJul 25, 06:20 UTC10m
2026-07-25 ASA70 ANC → JNU Jul 25, 04:04 UTCJul 25, 05:11 UTC1h 7m
2026-07-25 ASA70 ANC → JNU Jul 25, 03:55 UTCJul 25, 05:05 UTC1h 10m
2026-07-25 ASA52 ANC → LAS Jul 25, 01:25 UTCJul 25, 02:30 UTC1h 5m
2026-07-25 ASA52 ANC → LAS Jul 25, 01:02 UTCJul 25, 02:31 UTC1h 29m
2026-07-24 ASA51 ANC → BRW Jul 24, 22:15 UTCJul 24, 23:25 UTC1h 10m
2026-07-24 ASA51 ANC → BRW Jul 24, 22:12 UTCJul 24, 23:57 UTC1h 45m
2026-07-24 ASA1528 SEA → BUR Jul 24, 19:46 UTCJul 24, 20:39 UTC53m
2026-07-24 ASA1528 SEA → BUR Jul 24, 19:30 UTCJul 24, 20:40 UTC1h 10m
2026-07-24 ASA1527 ANC → OTZ Jul 24, 17:05 UTCJul 24, 18:25 UTC1h 20m
2026-07-23 ASA51 ANC → BRW Jul 23, 22:55 UTCJul 24, 03:20 UTC4h 25m
2026-07-23 ASA1528 SEA → BUR Jul 23, 20:20 UTCJul 23, 21:35 UTC1h 15m
2026-07-23 ASA1527 ANC → OTZ Jul 23, 17:35 UTCJul 23, 18:55 UTC1h 20m
2026-07-23 ASA1339 CUN → LAX Jul 23, 14:50 UTCJul 23, 15:35 UTC45m
2026-07-23 ASA1612 ANC → FAI Jul 23, 04:50 UTCJul 23, 05:30 UTC40m
2026-07-23 ASA1544 ANC → OME Jul 23, 02:30 UTCJul 23, 03:40 UTC1h 10m
2026-07-22 ASA1544 ANC → OME Jul 22, 23:45 UTCJul 23, 00:50 UTC1h 5m
2026-07-22 ASA61 CDV → ANC Jul 22, 21:05 UTCJul 22, 21:40 UTC35m
2026-07-22 ASA61 SEA → JNU Jul 22, 21:01 UTCJul 22, 21:38 UTC37m
2026-07-22 ASA61 YAK → CDV Jul 22, 19:15 UTCJul 22, 19:50 UTC35m
2026-07-22 ASA61 - Jul 22, 17:35 UTCJul 22, 18:10 UTC35m
2026-07-22 ASA61 - Jul 22, 14:25 UTCJul 22, 16:20 UTC1h 55m
2026-07-22 ASA221 JFK → SEA Jul 22, 10:20 UTCJul 22, 11:55 UTC1h 35m
2026-07-22 ASA221 JFK → SEA Jul 22, 08:49 UTCJul 22, 11:41 UTC2h 52m
2026-07-22 ASA9671 ANC → RDB Jul 22, 01:30 UTCJul 22, 03:00 UTC1h 30m
2026-07-21 ASA9669 - Jul 21, 23:15 UTCJul 22, 00:30 UTC1h 15m
2026-07-21 ASA61 CDV → ANC Jul 21, 21:10 UTCJul 21, 21:50 UTC40m
2026-07-21 ASA61 YAK → CDV Jul 21, 19:15 UTCJul 21, 19:55 UTC40m
2026-07-21 ASA61 YAK → CDV Jul 21, 19:12 UTCJul 21, 19:51 UTC39m
2026-07-21 ASA61 - Jul 21, 17:50 UTCJul 21, 18:20 UTC30m
2026-07-21 ASA61 - Jul 21, 14:20 UTCJul 21, 16:15 UTC1h 55m
2026-07-21 ASA221 JFK → SEA Jul 21, 08:30 UTCJul 21, 11:45 UTC3h 15m
2026-07-21 ASA87 SEA → SJC Jul 21, 02:45 UTCJul 21, 03:50 UTC1h 5m
2026-07-20 ASA86 - Jul 20, 23:50 UTCJul 21, 03:15 UTC3h 25m
2026-07-20 ASA86 ANC → SCC Jul 20, 23:47 UTCJul 21, 01:10 UTC1h 23m
2026-07-20 ASA1415 LIR → LAX Jul 20, 21:50 UTCJul 20, 22:40 UTC50m
2026-07-20 ASA1415 LIR → LAX Jul 20, 21:46 UTCJul 20, 22:35 UTC49m
2026-07-20 ASA1552 SEA → FAI Jul 20, 17:45 UTCJul 20, 20:45 UTC3h 0m

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 N612AS page for operator, model, and routing details .

Mode-S A7F63D frequently asked

What is Mode-S code A7F63D?
A7F63D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N612AS.
Where is Mode-S A7F63D registered?
Mode-S code A7F63D 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 A7F63D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7F63D, octal 51773075, decimal 11,007,549.
What flights does A7F63D operate?
Mode-S A7F63D has broadcast 20 distinct callsigns, including ASA65, ASA66, ASA61, ASA64, ASA67.