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sensors Mode-S transponder

A1D433

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N217HA · AIRBUS A-321neo · operated by HAWAIIAN AIRLINES INC

Hex
A1D433
Octal
50352063
Decimal
10,605,619
Country
US
Tail
N217HA
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
261
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1D433.

Country allocation

The ICAO 24-bit address A1D433 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
ASA878 Alaska Airlines 10 2026-06-10
ASA868 Alaska Airlines 10 2026-06-09
ASA971 - 9 2026-07-04
ASA844 - 9 2026-07-11
ASA972 - 8 2026-07-04
ASA968 - 8 2026-06-17
ASA953 - 8 2026-07-05
ASA867 Alaska Airlines 8 2026-06-09
ASA959 - 7 2026-06-27
ASA870 - 7 2026-06-24
ASA825 - 7 2026-07-12
ASA965 - 6 2026-07-08
ASA932 - 6 2026-07-06
ASA931 - 6 2026-07-06
ASA920 Alaska Airlines 6 2026-07-09
ASA869 Alaska Airlines 6 2026-06-12
ASA848 Alaska Airlines 6 2026-05-31
ASA967 - 5 2026-06-18
ASA966 - 5 2026-07-07
ASA963 Alaska Airlines 5 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASA956 - Jul 13, 21:25 UTCJul 14, 02:10 UTC4h 45m
2026-07-13 ASA955 SJC → LAX Jul 13, 14:10 UTCJul 13, 19:05 UTC4h 55m
2026-07-13 ASA921 - Jul 13, 03:01 UTCJul 13, 03:55 UTC55m
2026-07-12 ASA921 - Jul 12, 23:00 UTCJul 12, 23:15 UTC15m
2026-07-12 ASA825 - Jul 12, 21:25 UTCJul 12, 21:30 UTC5m
2026-07-12 ASA825 - Jul 12, 16:35 UTCJul 12, 17:05 UTC30m
2026-07-12 ASA845 - Jul 12, 04:15 UTCJul 12, 04:55 UTC40m
2026-07-11 ASA844 - Jul 11, 17:25 UTCJul 11, 18:00 UTC35m
2026-07-11 ASA853 - Jul 11, 14:30 UTCJul 11, 15:05 UTC35m
2026-07-11 ASA853 - Jul 11, 10:15 UTCJul 11, 10:35 UTC20m
2026-07-10 ASA855 SEA → SJC Jul 10, 09:35 UTCJul 10, 09:50 UTC15m
2026-07-10 ASA855 SEA → SJC Jul 10, 04:10 UTCJul 10, 05:05 UTC55m
2026-07-10 ASA839 SEA → LIH Jul 10, 00:50 UTCJul 10, 01:55 UTC1h 5m
2026-07-09 ASA839 SEA → LIH Jul 9, 20:30 UTCJul 9, 20:45 UTC15m
2026-07-09 ASA854 - Jul 9, 04:15 UTCJul 9, 09:55 UTC5h 40m
2026-07-09 ASA920 RDU → SEA Jul 9, 01:40 UTCJul 9, 02:25 UTC45m
2026-07-08 ASA920 RDU → SEA Jul 8, 21:25 UTCJul 8, 21:40 UTC15m
2026-07-08 ASA965 - Jul 8, 19:35 UTCJul 8, 19:50 UTC15m
2026-07-08 ASA965 - Jul 8, 14:50 UTCJul 8, 15:35 UTC45m
2026-07-07 ASA966 - Jul 7, 21:05 UTCJul 8, 02:00 UTC4h 55m
2026-07-07 ASA965 - Jul 7, 14:10 UTCJul 7, 18:55 UTC4h 45m
2026-07-07 ASA960 - Jul 7, 01:40 UTCJul 7, 02:15 UTC35m
2026-07-06 ASA931 - Jul 6, 14:30 UTCJul 6, 15:40 UTC1h 10m
2026-07-06 ASA932 - Jul 6, 00:55 UTCJul 6, 01:55 UTC1h 0m
2026-07-05 ASA953 - Jul 5, 14:05 UTCJul 5, 14:40 UTC35m
2026-07-04 ASA971 LGB → SJC Jul 4, 15:20 UTCJul 5, 02:40 UTC11h 20m
2026-07-04 ASA972 - Jul 4, 03:00 UTCJul 4, 03:35 UTC35m
2026-07-03 ASA9918 - Jul 3, 20:50 UTCJul 3, 21:10 UTC20m
2026-07-03 ASA894 KOA → SAN Jul 3, 01:05 UTCJul 3, 06:40 UTC5h 35m
2026-07-02 ASA892 HNL → SAN Jul 2, 22:20 UTCJul 2, 23:00 UTC40m
2026-07-02 ASA892 HNL → SAN Jul 2, 18:05 UTCJul 2, 18:25 UTC20m
2026-07-02 ASA854 - Jul 2, 04:15 UTCJul 2, 09:40 UTC5h 25m
2026-07-02 ASA920 RDU → SEA Jul 2, 01:35 UTCJul 2, 02:10 UTC35m
2026-07-01 ASA920 RDU → SEA Jul 1, 21:20 UTCJul 1, 21:30 UTC10m
2026-07-01 ASA965 - Jul 1, 19:35 UTCJul 1, 19:50 UTC15m
2026-07-01 ASA965 - Jul 1, 14:55 UTCJul 1, 15:30 UTC35m
2026-06-30 ASA931 LAS → SMF Jun 30, 14:30 UTCJul 1, 02:20 UTC11h 50m
2026-06-30 ASA932 - Jun 30, 00:49 UTCJun 30, 01:50 UTC1h 1m
2026-06-29 ASA953 - Jun 29, 14:29 UTCJun 29, 15:09 UTC40m
2026-06-29 ASA954 - Jun 29, 02:14 UTCJun 29, 02:54 UTC40m
2026-06-28 ASA971 - Jun 28, 15:24 UTCJun 28, 15:55 UTC30m
2026-06-28 ASA972 - Jun 28, 02:39 UTCJun 28, 03:14 UTC35m
2026-06-27 ASA959 - Jun 27, 15:45 UTCJun 27, 16:30 UTC45m
2026-06-27 ASA960 - Jun 27, 01:59 UTCJun 27, 02:45 UTC45m
2026-06-26 ASA931 - Jun 26, 15:05 UTCJun 26, 16:09 UTC1h 5m
2026-06-26 ASA932 - Jun 26, 01:05 UTCJun 26, 02:05 UTC1h 0m
2026-06-25 ASA953 SJC → OGG Jun 25, 14:14 UTCJun 25, 14:50 UTC35m
2026-06-25 ASA954 - Jun 25, 03:10 UTCJun 25, 03:50 UTC40m
2026-06-24 ASA971 - Jun 24, 16:54 UTCJun 24, 17:29 UTC35m
2026-06-24 ASA870 - Jun 24, 03:24 UTCJun 24, 04:00 UTC35m

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 N217HA page for operator, model, and routing details .

Mode-S A1D433 frequently asked

What is Mode-S code A1D433?
A1D433 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N217HA.
Where is Mode-S A1D433 registered?
Mode-S code A1D433 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 A1D433 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 A1D433, octal 50352063, decimal 10,605,619.
What flights does A1D433 operate?
Mode-S A1D433 has broadcast 20 distinct callsigns, including ASA878, ASA868, ASA971, ASA844, ASA972.