Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A81DBC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N622AS · BOEING 737-700 · operated by ALASKA AIRLINES INC

Hex
A81DBC
Octal
52016674
Decimal
11,017,660
Country
US
Tail
N622AS
Type
B737
No current signal · last broadcast Jul 26, 04:30 UTC
Flights observed
633
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 04:30 UTC

Last known position

Most recent position reported by Mode-S A81DBC.

Country allocation

The ICAO 24-bit address A81DBC 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 Alaska Airlines 54 2026-07-25
ASA66 - 38 2026-07-12
ASA61 - 34 2026-07-12
ASA70 Alaska Airlines 29 2026-07-20
ASA73 - 26 2026-07-20
ASA60 Alaska Airlines 25 2026-07-23
ASA69 Alaska Airlines 21 2026-07-23
ASA62 Alaska Airlines 20 2026-06-03
ASA697 Alaska Airlines 15 2026-07-22
ASA67 Alaska Airlines 15 2026-06-03
ASA64 - 12 2026-06-30
ASA43 - 12 2026-07-18
ASA155 Alaska Airlines 8 2026-04-20
ASA1528 Alaska Airlines 8 2026-07-17
ASA71 - 7 2026-07-10
ASA51 - 7 2026-07-17
ASA445 Alaska Airlines 7 2026-07-24
ASA435 Alaska Airlines 7 2026-07-21
ASA362 Alaska Airlines 7 2026-05-04
ASA350 - 7 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1613 JNU → ANC Jul 26, 03:05 UTCJul 26, 04:20 UTC1h 15m
2026-07-26 ASA1613 JNU → ANC Jul 26, 03:17 UTCJul 26, 04:17 UTC1h 0m
2026-07-26 ASA1537 SEA → MSO Jul 26, 00:25 UTCJul 26, 01:35 UTC1h 10m
2026-07-25 ASA65 SEA → KTN Jul 25, 21:15 UTCJul 25, 22:35 UTC1h 20m
2026-07-25 ASA65 SEA → KTN Jul 25, 21:20 UTCJul 25, 22:43 UTC1h 23m
2026-07-25 ASA65 SEA → KTN Jul 25, 19:30 UTCJul 25, 19:50 UTC20m
2026-07-25 ASA65 SEA → KTN Jul 25, 17:15 UTCJul 25, 17:35 UTC20m
2026-07-25 ASA65 SEA → KTN Jul 25, 14:15 UTCJul 25, 15:30 UTC1h 15m
2026-07-25 ASA665 PDX → ANC Jul 25, 01:05 UTCJul 25, 02:40 UTC1h 35m
2026-07-24 ASA368 SFO → MCO Jul 24, 22:00 UTCJul 24, 23:40 UTC1h 40m
2026-07-24 ASA796 SJC → LAX Jul 24, 17:45 UTCJul 24, 19:25 UTC1h 40m
2026-07-24 ASA292 SFO → EWR Jul 24, 14:30 UTCJul 24, 16:00 UTC1h 30m
2026-07-24 ASA445 SAN → AUS Jul 24, 04:50 UTCJul 24, 06:40 UTC1h 50m
2026-07-24 ASA690 SFO → LAS Jul 24, 00:35 UTCJul 24, 00:45 UTC10m
2026-07-23 ASA60 KTN → SEA Jul 23, 21:10 UTCJul 23, 23:10 UTC2h 0m
2026-07-23 ASA60 KTN → SEA Jul 23, 17:25 UTCJul 23, 18:55 UTC1h 30m
2026-07-23 ASA60 KTN → SEA Jul 23, 15:35 UTCJul 23, 16:05 UTC30m
2026-07-23 ASA60 KTN → SEA Jul 23, 15:31 UTCJul 23, 16:10 UTC39m
2026-07-23 ASA69 SEA → KTN Jul 23, 04:20 UTCJul 23, 04:55 UTC35m
2026-07-23 ASA69 SEA → KTN Jul 23, 01:55 UTCJul 23, 03:10 UTC1h 15m
2026-07-23 ASA69 SEA → KTN Jul 23, 01:55 UTCJul 23, 03:22 UTC1h 27m
2026-07-22 ASA697 MSO → SEA Jul 22, 23:35 UTCJul 23, 00:40 UTC1h 5m
2026-07-22 ASA697 MSO → SEA Jul 22, 21:00 UTCJul 22, 21:50 UTC50m
2026-07-22 ASA796 SJC → LAX Jul 22, 17:30 UTCJul 22, 19:05 UTC1h 35m
2026-07-22 ASA292 SFO → EWR Jul 22, 14:35 UTCJul 22, 16:10 UTC1h 35m
2026-07-22 ASA445 SAN → AUS Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-22 ASA766 SEA → SFO Jul 22, 02:20 UTCJul 22, 02:30 UTC10m
2026-07-22 ASA764 SMF → SEA Jul 22, 00:32 UTCJul 22, 00:49 UTC17m
2026-07-21 ASA435 SEA → SFO Jul 21, 21:05 UTCJul 21, 22:55 UTC1h 50m
2026-07-21 ASA60 KTN → SEA Jul 21, 17:35 UTCJul 21, 19:00 UTC1h 25m
2026-07-21 ASA60 KTN → SEA Jul 21, 17:33 UTCJul 21, 19:00 UTC1h 27m
2026-07-21 ASA60 KTN → SEA Jul 21, 15:50 UTCJul 21, 16:25 UTC35m
2026-07-21 ASA69 SEA → KTN Jul 21, 04:35 UTCJul 21, 05:05 UTC30m
2026-07-21 ASA69 SEA → KTN Jul 21, 02:20 UTCJul 21, 03:35 UTC1h 15m
2026-07-20 ASA1839 FAI → SEA Jul 20, 20:25 UTCJul 20, 23:50 UTC3h 25m
2026-07-20 ASA466 ANC → FAI Jul 20, 18:25 UTCJul 20, 19:05 UTC40m
2026-07-20 - - Jul 20, 15:45 UTCJul 20, 17:10 UTC1h 25m
2026-07-20 ASA73 - Jul 20, 14:00 UTCJul 20, 14:20 UTC20m
2026-07-20 ASA70 ANC → JNU Jul 20, 06:05 UTCJul 20, 06:20 UTC15m
2026-07-20 ASA1439 SJC → SJD Jul 20, 03:40 UTCJul 20, 05:05 UTC1h 25m
2026-07-20 ASA1439 SJC → SJD Jul 20, 01:31 UTCJul 20, 02:04 UTC33m
2026-07-20 ASA1439 SJC → SJD Jul 20, 01:20 UTCJul 20, 02:15 UTC55m
2026-07-19 ASA1440 SJC → GDL Jul 19, 23:25 UTCJul 20, 00:05 UTC40m
2026-07-19 ASA1527 ANC → OTZ Jul 19, 19:25 UTCJul 19, 20:45 UTC1h 20m
2026-07-19 ASA1527 ANC → OTZ Jul 19, 17:10 UTCJul 19, 18:20 UTC1h 10m
2026-07-19 ASA46 - Jul 19, 01:30 UTCJul 19, 02:20 UTC50m
2026-07-18 ASA43 - Jul 18, 23:25 UTCJul 19, 00:10 UTC45m
2026-07-18 ASA55 ANC → SCC Jul 18, 18:40 UTCJul 18, 22:05 UTC3h 25m
2026-07-18 ASA55 ANC → SCC Jul 18, 13:45 UTCJul 18, 17:20 UTC3h 35m
2026-07-18 ASA52 BRW → ANC Jul 18, 01:19 UTCJul 18, 02:31 UTC1h 12m

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 N622AS page for operator, model, and routing details .

Mode-S A81DBC frequently asked

What is Mode-S code A81DBC?
A81DBC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N622AS.
Where is Mode-S A81DBC registered?
Mode-S code A81DBC 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 A81DBC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 04:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A81DBC, octal 52016674, decimal 11,017,660.
What flights does A81DBC operate?
Mode-S A81DBC has broadcast 20 distinct callsigns, including ASA65, ASA66, ASA61, ASA70, ASA73.