Apparatus

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sensors Mode-S transponder

A1D7EA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N218HA · AIRBUS A-321neo · operated by HAWAIIAN AIRLINES INC

Hex
A1D7EA
Octal
50353752
Decimal
10,606,570
Country
US
Tail
N218HA
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
145
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1D7EA.

Country allocation

The ICAO 24-bit address A1D7EA 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 2026-05-11
ASA869 Alaska Airlines 12 2026-05-21
ASA966 Alaska Airlines 11 2026-05-12
ASA870 Alaska Airlines 8 2026-05-21
ASA960 Alaska Airlines 7 2026-05-09
ASA972 Alaska Airlines 6 2026-05-13
ASA959 Alaska Airlines 6 2026-05-12
ASA868 Alaska Airlines 6 2026-05-22
ASA971 Alaska Airlines 5 2026-05-08
ASA992 Alaska Airlines 4 2026-05-10
ASA991 Alaska Airlines 4 2026-05-11
ASA954 Alaska Airlines 4 2026-05-30
ASA878 Alaska Airlines 4 2026-05-18
ASA862 Alaska Airlines 4 2026-05-29
ASA844 Alaska Airlines 4 2026-05-28
ASA843 Alaska Airlines 4 2026-05-28
ASA828 Alaska Airlines 4 2026-04-21
ASA941 Alaska Airlines 3 2026-05-29
ASA867 Alaska Airlines 3 2026-05-22
ASA953 Alaska Airlines 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 ASA954 SEA → PDX May 30, 03:30 UTCMay 30, 04:05 UTC35m
2026-05-29 ASA941 SEA → ORD May 29, 16:55 UTCMay 29, 17:20 UTC25m
2026-05-29 ASA862 OGG → SEA May 29, 14:20 UTCMay 29, 14:50 UTC30m
2026-05-29 ASA862 OGG → SEA May 29, 10:25 UTCMay 29, 10:40 UTC15m
2026-05-29 ASA903 PVR → SEA May 29, 01:00 UTCMay 29, 06:40 UTC5h 40m
2026-05-28 ASA904 SEA → BZN May 28, 22:15 UTCMay 28, 23:00 UTC45m
2026-05-28 ASA904 SEA → BZN May 28, 17:50 UTCMay 28, 18:05 UTC15m
2026-05-28 ASA843 SFO → LAX May 28, 09:40 UTCMay 28, 09:50 UTC10m
2026-05-28 ASA843 SFO → LAX May 28, 04:15 UTCMay 28, 05:05 UTC50m
2026-05-28 ASA844 LAX → PDX May 28, 01:30 UTCMay 28, 02:25 UTC55m
2026-05-27 ASA844 LAX → PDX May 27, 21:00 UTCMay 27, 21:20 UTC20m
2026-05-27 ASA843 SFO → LAX May 27, 09:10 UTCMay 27, 09:30 UTC20m
2026-05-27 ASA843 SFO → LAX May 27, 04:09 UTCMay 27, 04:55 UTC45m
2026-05-27 ASA844 LAX → PDX May 27, 01:29 UTCMay 27, 02:29 UTC1h 0m
2026-05-26 ASA844 LAX → PDX May 26, 21:00 UTCMay 26, 21:14 UTC15m
2026-05-26 ASA847 OAK → HNL May 26, 14:05 UTCMay 26, 18:55 UTC4h 50m
2026-05-26 ASA968 LIH → OAK May 26, 00:19 UTCMay 26, 05:20 UTC5h 0m
2026-05-25 ASA963 GEG → SEA May 25, 17:00 UTCMay 25, 21:49 UTC4h 50m
2026-05-25 ASA897 SAN → KOA May 25, 14:30 UTCMay 25, 15:05 UTC35m
2026-05-25 ASA897 SAN → KOA May 25, 09:55 UTCMay 25, 10:10 UTC15m
2026-05-25 ASA861 SEA → OGG May 25, 07:25 UTCMay 25, 07:45 UTC20m
2026-05-25 ASA861 SEA → OGG May 25, 03:10 UTCMay 25, 03:40 UTC30m
2026-05-24 ASA953 SJC → OGG May 24, 14:15 UTCMay 24, 14:50 UTC35m
2026-05-24 ASA954 SEA → PDX May 24, 03:50 UTCMay 24, 04:25 UTC35m
2026-05-23 ASA941 SEA → ORD May 23, 17:00 UTCMay 23, 17:35 UTC35m
2026-05-23 ASA862 OGG → SEA May 23, 14:15 UTCMay 23, 15:00 UTC45m
2026-05-23 ASA862 OGG → SEA May 23, 10:15 UTCMay 23, 10:35 UTC20m
2026-05-23 ASA1155 SNA → SEA May 23, 06:15 UTCMay 23, 06:40 UTC25m
2026-05-23 ASA1136 SJC → PDX May 23, 04:25 UTCMay 23, 04:45 UTC20m
2026-05-23 ASA1087 ONT → SEA May 23, 02:40 UTCMay 23, 03:10 UTC30m
2026-05-23 ASA1030 SEA → BZN May 23, 01:15 UTCMay 23, 01:30 UTC15m
2026-05-22 ASA1086 SEA → ONT May 22, 23:40 UTCMay 23, 00:00 UTC20m
2026-05-22 ASA867 PDX → KOA May 22, 13:25 UTCMay 22, 19:30 UTC6h 5m
2026-05-22 ASA868 KOA → PDX May 22, 03:10 UTCMay 22, 04:55 UTC1h 45m
2026-05-21 ASA868 KOA → PDX May 21, 23:00 UTCMay 21, 23:25 UTC25m
2026-05-21 ASA869 SJC → KOA May 21, 20:20 UTCMay 21, 20:40 UTC20m
2026-05-21 ASA869 SJC → KOA May 21, 15:20 UTCMay 21, 15:55 UTC35m
2026-05-21 ASA870 LIH → PDX May 21, 03:30 UTCMay 21, 04:00 UTC30m
2026-05-20 ASA870 LIH → PDX May 20, 22:55 UTCMay 20, 23:10 UTC15m
2026-05-20 ASA867 PDX → KOA May 20, 13:20 UTCMay 20, 19:25 UTC6h 5m
2026-05-20 ASA868 KOA → PDX May 20, 03:10 UTCMay 20, 04:55 UTC1h 46m
2026-05-19 ASA868 KOA → PDX May 19, 23:05 UTCMay 19, 23:25 UTC20m
2026-05-19 ASA869 SJC → KOA May 19, 20:35 UTCMay 19, 21:05 UTC30m
2026-05-19 ASA869 SJC → KOA May 19, 15:30 UTCMay 19, 16:05 UTC35m
2026-05-19 ASA870 LIH → PDX May 19, 03:30 UTCMay 19, 04:05 UTC35m
2026-05-18 ASA870 LIH → PDX May 18, 23:05 UTCMay 18, 23:25 UTC20m
2026-05-18 ASA898 OGG → PDX May 18, 04:40 UTCMay 18, 10:00 UTC5h 20m
2026-05-18 ASA878 OGG → SFO May 18, 01:55 UTCMay 18, 02:35 UTC40m
2026-05-17 ASA878 OGG → SFO May 17, 21:30 UTCMay 17, 21:50 UTC20m
2026-05-16 ASA1164 SJC → SEA May 16, 09:25 UTCMay 16, 09:40 UTC15m

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 N218HA page for operator, model, and routing details .

Mode-S A1D7EA frequently asked

What is Mode-S code A1D7EA?
A1D7EA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N218HA.
Where is Mode-S A1D7EA registered?
Mode-S code A1D7EA 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 A1D7EA broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1D7EA, octal 50353752, decimal 10,606,570.
What flights does A1D7EA operate?
Mode-S A1D7EA has broadcast 20 distinct callsigns, including ASA965, ASA869, ASA966, ASA870, ASA960.