Apparatus

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sensors Mode-S transponder

A1B422

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N209HA · AIRBUS A-321neo · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A1B422
Octal
50332042
Decimal
10,597,410
Country
US
Tail
N209HA
Type
A21N
No current signal · last broadcast 7h ago
Flights observed
94
Distinct callsigns
20
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A1B422.

Country allocation

The ICAO 24-bit address A1B422 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
ASA959 Alaska Airlines 5 2026-05-28
ASA931 Alaska Airlines 5 2026-05-27
ASA924 Alaska Airlines 5 2026-05-26
ASA923 Alaska Airlines 5 2026-05-26
ASA870 Alaska Airlines 5 2026-05-25
ASA869 Alaska Airlines 5 2026-05-29
ASA972 Alaska Airlines 4 2026-05-29
ASA960 Alaska Airlines 4 2026-05-28
ASA941 Alaska Airlines 4 2026-05-11
ASA932 Alaska Airlines 4 2026-05-27
ASA888 Alaska Airlines 4 2026-05-24
ASA971 Alaska Airlines 3 2026-05-25
ASA964 Alaska Airlines 3 2026-05-24
ASA822 Alaska Airlines 3 2026-05-11
ASA967 Alaska Airlines 2 2026-05-23
ASA966 Alaska Airlines 2 2026-04-17
ASA965 - 2 2026-04-16
ASA954 Alaska Airlines 2 2026-05-13
ASA9480 - 2 2026-05-10
ASA891 Alaska Airlines 2 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 ASA868 KOA → PDX May 30, 03:05 UTCMay 30, 04:40 UTC1h 35m
2026-05-29 ASA868 KOA → PDX May 29, 23:00 UTCMay 29, 23:15 UTC15m
2026-05-29 ASA869 SJC → KOA May 29, 15:30 UTCMay 29, 21:05 UTC5h 35m
2026-05-29 ASA972 SEA → YYZ May 29, 02:45 UTCMay 29, 03:20 UTC35m
2026-05-28 ASA959 SEA → GEG May 28, 15:45 UTCMay 28, 16:20 UTC35m
2026-05-28 ASA960 SEA → GEG May 28, 02:10 UTCMay 28, 02:55 UTC45m
2026-05-27 ASA931 RNO → SEA May 27, 15:05 UTCMay 27, 16:25 UTC1h 20m
2026-05-27 ASA932 SEA → ABQ May 27, 01:34 UTCMay 27, 02:29 UTC55m
2026-05-26 ASA923 OAK → OGG May 26, 14:30 UTCMay 26, 15:00 UTC30m
2026-05-26 ASA924 RDM → SEA May 26, 03:40 UTCMay 26, 04:15 UTC35m
2026-05-25 ASA971 SFO → SEA May 25, 16:25 UTCMay 25, 17:00 UTC35m
2026-05-25 ASA870 LIH → PDX May 25, 03:20 UTCMay 25, 03:55 UTC35m
2026-05-24 ASA870 LIH → PDX May 24, 23:00 UTCMay 24, 23:10 UTC10m
2026-05-24 ASA888 HNL → SEA May 24, 16:05 UTCMay 24, 21:00 UTC4h 55m
2026-05-24 ASA964 GEG → SEA May 24, 04:20 UTCMay 24, 05:05 UTC45m
2026-05-23 ASA967 OAK → LIH May 23, 17:20 UTCMay 23, 21:55 UTC4h 35m
2026-05-22 ASA848 HNL → SEA May 22, 23:00 UTCMay 23, 04:00 UTC4h 59m
2026-05-22 ASA869 SJC → KOA May 22, 15:20 UTCMay 22, 20:30 UTC5h 10m
2026-05-22 ASA972 SEA → YYZ May 22, 02:45 UTCMay 22, 03:20 UTC35m
2026-05-21 ASA959 SEA → GEG May 21, 15:50 UTCMay 21, 16:30 UTC40m
2026-05-21 ASA960 SEA → GEG May 21, 02:05 UTCMay 21, 02:55 UTC50m
2026-05-20 ASA931 RNO → SEA May 20, 14:45 UTCMay 20, 16:05 UTC1h 20m
2026-05-20 ASA932 SEA → ABQ May 20, 01:05 UTCMay 20, 02:05 UTC1h 0m
2026-05-19 ASA923 OAK → OGG May 19, 14:35 UTCMay 19, 15:00 UTC25m
2026-05-18 ASA924 RDM → SEA May 18, 16:15 UTCMay 19, 04:10 UTC11h 54m
2026-05-18 ASA972 SEA → YYZ May 18, 02:15 UTCMay 18, 03:01 UTC45m
2026-05-17 ASA959 SEA → GEG May 17, 15:55 UTCMay 17, 16:25 UTC30m
2026-05-17 ASA960 SEA → GEG May 17, 02:10 UTCMay 17, 02:45 UTC35m
2026-05-16 ASA931 RNO → SEA May 16, 14:35 UTCMay 16, 15:55 UTC1h 20m
2026-05-16 ASA932 SEA → ABQ May 16, 01:00 UTCMay 16, 02:00 UTC1h 0m
2026-05-15 ASA923 OAK → OGG May 15, 14:35 UTCMay 15, 15:05 UTC29m
2026-05-15 ASA924 RDM → SEA May 15, 04:55 UTCMay 15, 05:30 UTC35m
2026-05-14 ASA971 SFO → SEA May 14, 18:30 UTCMay 14, 19:00 UTC30m
2026-05-14 ASA870 LIH → PDX May 14, 01:25 UTCMay 14, 06:30 UTC5h 5m
2026-05-13 ASA827 ANC → HNL May 13, 16:00 UTCMay 13, 20:55 UTC4h 55m
2026-05-13 ASA954 SEA → PDX May 13, 02:05 UTCMay 13, 02:40 UTC35m
2026-05-12 ASA931 RNO → SEA May 12, 14:55 UTCMay 12, 15:55 UTC1h 0m
2026-05-11 ASA941 SEA → ORD May 11, 19:30 UTCMay 11, 19:40 UTC10m
2026-05-11 ASA941 SEA → ORD May 11, 15:00 UTCMay 11, 15:25 UTC25m
2026-05-11 ASA822 KOA → SEA May 11, 08:00 UTCMay 11, 12:45 UTC4h 45m
2026-05-10 ASA9480 - May 10, 21:49 UTCMay 10, 22:05 UTC15m
2026-05-10 ASA9480 - May 10, 19:54 UTCMay 10, 21:00 UTC1h 5m
2026-04-30 ASA888 HNL → SEA Apr 30, 21:35 UTCApr 30, 21:55 UTC20m
2026-04-30 ASA888 HNL → SEA Apr 30, 16:45 UTCApr 30, 17:30 UTC45m
2026-04-29 ASA964 GEG → SEA Apr 29, 22:40 UTCApr 30, 03:50 UTC5h 9m
2026-04-29 ASA967 OAK → LIH Apr 29, 16:05 UTCApr 29, 20:45 UTC4h 40m
2026-04-29 ASA924 RDM → SEA Apr 29, 01:30 UTCApr 29, 02:09 UTC40m
2026-04-28 ASA941 SEA → ORD Apr 28, 14:50 UTCApr 28, 15:15 UTC25m
2026-04-28 ASA822 KOA → SEA Apr 28, 12:35 UTCApr 28, 13:10 UTC35m
2026-04-28 ASA822 KOA → SEA Apr 28, 08:00 UTCApr 28, 08:20 UTC20m

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 N209HA page for operator, model, and routing details .

Mode-S A1B422 frequently asked

What is Mode-S code A1B422?
A1B422 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N209HA.
Where is Mode-S A1B422 registered?
Mode-S code A1B422 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 A1B422 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1B422, octal 50332042, decimal 10,597,410.
What flights does A1B422 operate?
Mode-S A1B422 has broadcast 20 distinct callsigns, including ASA959, ASA931, ASA924, ASA923, ASA870.