Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1ECD6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N223HA · AIRBUS A-321neo · operated by HAWAIIAN AIRLINES INC

Hex
A1ECD6
Octal
50366326
Decimal
10,611,926
Country
US
Tail
N223HA
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
137
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1ECD6.

Country allocation

The ICAO 24-bit address A1ECD6 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
ASA965 Alaska Airlines 12 2026-05-29
ASA966 Alaska Airlines 10 2026-05-29
ASA959 Alaska Airlines 6 2026-05-05
ASA953 Alaska Airlines 6 2026-05-19
ASA960 Alaska Airlines 5 2026-05-26
ASA862 Alaska Airlines 5 2026-05-18
ASA861 Alaska Airlines 5 2026-05-20
ASA828 Alaska Airlines 5 2026-04-20
ASA972 Alaska Airlines 4 2026-05-06
ASA954 Alaska Airlines 4 2026-05-19
ASA941 Alaska Airlines 4 2026-05-18
ASA867 Alaska Airlines 4 2026-05-12
ASA971 Alaska Airlines 3 2026-05-04
ASA932 Alaska Airlines 3 2026-05-25
ASA892 Alaska Airlines 3 2026-05-13
ASA869 Alaska Airlines 3 2026-05-06
ASA848 Alaska Airlines 3 2026-05-24
ASA974 Alaska Airlines 2 2026-04-16
ASA967 Alaska Airlines 2 2026-05-07
ASA942 Alaska Airlines 2 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ASA965 SEA → SFO May 29, 14:15 UTCMay 30, 01:50 UTC11h 35m
2026-05-29 ASA966 GEG → SEA May 29, 01:05 UTCMay 29, 01:55 UTC50m
2026-05-28 ASA965 SEA → SFO May 28, 14:15 UTCMay 28, 19:05 UTC4h 50m
2026-05-28 ASA966 GEG → SEA May 28, 01:00 UTCMay 28, 01:45 UTC45m
2026-05-27 ASA966 GEG → SEA May 27, 20:40 UTCMay 27, 20:55 UTC15m
2026-05-27 ASA965 SEA → SFO May 27, 18:50 UTCMay 27, 19:05 UTC15m
2026-05-27 ASA965 SEA → SFO May 27, 14:10 UTCMay 27, 14:45 UTC35m
2026-05-26 ASA965 SEA → SFO May 26, 14:14 UTCMay 27, 02:04 UTC11h 50m
2026-05-26 ASA960 SEA → GEG May 26, 02:04 UTCMay 26, 02:49 UTC45m
2026-05-25 ASA931 RNO → SEA May 25, 14:55 UTCMay 25, 16:00 UTC1h 5m
2026-05-25 ASA932 SEA → ABQ May 25, 01:55 UTCMay 25, 02:15 UTC20m
2026-05-24 ASA923 OAK → OGG May 24, 14:30 UTCMay 24, 15:00 UTC30m
2026-05-24 ASA848 HNL → SEA May 24, 03:20 UTCMay 24, 03:50 UTC30m
2026-05-23 ASA848 HNL → SEA May 23, 22:50 UTCMay 23, 23:10 UTC20m
2026-05-23 ASA907 RDM → SEA May 23, 20:35 UTCMay 23, 21:00 UTC25m
2026-05-23 ASA907 RDM → SEA May 23, 15:40 UTCMay 23, 16:30 UTC50m
2026-05-23 ASA908 SEA → DFW May 23, 12:35 UTCMay 23, 13:25 UTC50m
2026-05-23 ASA908 SEA → DFW May 23, 08:20 UTCMay 23, 08:30 UTC10m
2026-05-23 ASA825 SEA → OGG May 23, 05:45 UTCMay 23, 06:05 UTC20m
2026-05-23 ASA825 SEA → OGG May 23, 01:05 UTCMay 23, 01:50 UTC45m
2026-05-22 ASA826 LIH → SAN May 22, 22:35 UTCMay 22, 23:30 UTC55m
2026-05-22 ASA826 LIH → SAN May 22, 18:05 UTCMay 22, 18:20 UTC15m
2026-05-22 ASA1154 AUS → SFO May 22, 07:05 UTCMay 22, 07:15 UTC10m
2026-05-22 ASA1143 PDX → LAX May 22, 05:35 UTCMay 22, 05:50 UTC15m
2026-05-22 ASA1114 SEA → SJC May 22, 04:20 UTCMay 22, 04:30 UTC10m
2026-05-22 ASA1093 LAX → SEA May 22, 02:30 UTCMay 22, 02:50 UTC20m
2026-05-22 ASA1077 AUS → SFO May 22, 00:20 UTCMay 22, 00:55 UTC35m
2026-05-21 ASA1088 PDX → SMF May 21, 22:50 UTCMay 21, 23:20 UTC30m
2026-05-21 ASA1085 SNA → PDX May 21, 21:15 UTCMay 21, 21:40 UTC25m
2026-05-21 ASA1039 SEA → PDX May 21, 19:55 UTCMay 21, 20:15 UTC20m
2026-05-21 ASA1038 ANC → SFO May 21, 18:15 UTCMay 21, 18:45 UTC30m
2026-05-21 ASA843 SFO → LAX May 21, 09:15 UTCMay 21, 09:30 UTC15m
2026-05-21 ASA843 SFO → LAX May 21, 04:10 UTCMay 21, 04:55 UTC45m
2026-05-21 ASA844 LAX → PDX May 21, 01:30 UTCMay 21, 02:30 UTC1h 0m
2026-05-20 ASA844 LAX → PDX May 20, 21:05 UTCMay 20, 21:20 UTC15m
2026-05-20 ASA861 SEA → OGG May 20, 03:15 UTCMay 20, 08:10 UTC4h 56m
2026-05-20 ASA942 ORD → SEA May 20, 00:45 UTCMay 20, 01:20 UTC35m
2026-05-19 ASA953 SJC → OGG May 19, 14:10 UTCMay 19, 14:40 UTC30m
2026-05-19 ASA954 SEA → PDX May 19, 03:55 UTCMay 19, 04:35 UTC40m
2026-05-18 ASA941 SEA → ORD May 18, 17:05 UTCMay 18, 17:30 UTC25m
2026-05-18 ASA862 OGG → SEA May 18, 10:15 UTCMay 18, 14:55 UTC4h 40m
2026-05-18 ASA861 SEA → OGG May 18, 03:10 UTCMay 18, 08:10 UTC5h 0m
2026-05-17 ASA953 SJC → OGG May 17, 14:10 UTCMay 18, 01:25 UTC11h 15m
2026-05-16 ASA954 SEA → PDX May 16, 16:50 UTCMay 17, 04:25 UTC11h 35m
2026-05-16 ASA862 OGG → SEA May 16, 14:20 UTCMay 16, 14:51 UTC30m
2026-05-16 ASA862 OGG → SEA May 16, 10:11 UTCMay 16, 10:20 UTC10m
2026-05-16 ASA861 SEA → OGG May 16, 08:05 UTCMay 16, 08:26 UTC20m
2026-05-16 ASA861 SEA → OGG May 16, 03:15 UTCMay 16, 03:40 UTC25m
2026-05-15 ASA953 SJC → OGG May 15, 14:25 UTCMay 16, 01:20 UTC10h 54m
2026-05-15 ASA954 SEA → PDX May 15, 03:40 UTCMay 15, 04:15 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 N223HA page for operator, model, and routing details .

Mode-S A1ECD6 frequently asked

What is Mode-S code A1ECD6?
A1ECD6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N223HA.
Where is Mode-S A1ECD6 registered?
Mode-S code A1ECD6 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 A1ECD6 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 A1ECD6, octal 50366326, decimal 10,611,926.
What flights does A1ECD6 operate?
Mode-S A1ECD6 has broadcast 20 distinct callsigns, including ASA965, ASA966, ASA959, ASA953, ASA960.