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 Jul 26, 21:50 UTC
Flights observed
336
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

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
ASA870 Alaska Airlines 17 2026-07-20
ASA965 - 15 2026-07-04
ASA869 - 14 2026-06-27
ASA966 - 12 2026-07-04
ASA920 Alaska Airlines 10 2026-07-22
ASA868 Alaska Airlines 9 2026-06-09
ASA843 Alaska Airlines 9 2026-07-24
ASA971 Alaska Airlines 8 2026-07-20
ASA960 - 8 2026-07-03
ASA922 - 8 2026-07-21
ASA841 Alaska Airlines 8 2026-07-19
ASA968 Alaska Airlines 7 2026-07-23
ASA963 Alaska Airlines 7 2026-07-22
ASA954 - 7 2026-07-21
ASA880 Alaska Airlines 7 2026-07-19
ASA879 Alaska Airlines 7 2026-07-19
ASA840 Alaska Airlines 7 2026-07-18
ASA972 Alaska Airlines 6 2026-05-13
ASA959 Alaska Airlines 6 2026-05-12
ASA862 Alaska Airlines 6 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA825 SEA → OGG Jul 26, 21:40 UTCJul 26, 21:45 UTC5m
2026-07-26 ASA825 SEA → OGG Jul 26, 16:35 UTCJul 26, 17:05 UTC30m
2026-07-25 ASA964 GEG → SEA Jul 25, 21:55 UTCJul 26, 02:45 UTC4h 50m
2026-07-25 ASA967 OAK → LIH Jul 25, 14:55 UTCJul 25, 20:00 UTC5h 5m
2026-07-25 ASA924 RDM → SEA Jul 25, 02:45 UTCJul 25, 03:40 UTC55m
2026-07-24 ASA979 FAT → SEA Jul 24, 16:45 UTCJul 24, 17:25 UTC40m
2026-07-24 ASA842 HNL → SFO Jul 24, 10:15 UTCJul 24, 14:40 UTC4h 25m
2026-07-24 ASA843 SFO → LAX Jul 24, 08:10 UTCJul 24, 08:25 UTC15m
2026-07-24 ASA843 SFO → LAX Jul 24, 03:15 UTCJul 24, 03:50 UTC35m
2026-07-24 ASA978 SEA → FAT Jul 24, 00:35 UTCJul 24, 01:20 UTC45m
2026-07-23 ASA923 - Jul 23, 14:10 UTCJul 23, 14:55 UTC45m
2026-07-23 ASA968 LIH → OAK Jul 23, 03:20 UTCJul 23, 07:40 UTC4h 20m
2026-07-22 ASA963 GEG → SEA Jul 22, 20:10 UTCJul 23, 01:35 UTC5h 25m
2026-07-22 ASA920 RDU → SEA Jul 22, 01:45 UTCJul 22, 02:20 UTC35m
2026-07-21 ASA920 RDU → SEA Jul 21, 21:30 UTCJul 21, 21:45 UTC15m
2026-07-21 ASA922 SFO → SEA Jul 21, 19:45 UTCJul 21, 19:50 UTC5m
2026-07-21 ASA922 - Jul 21, 14:40 UTCJul 21, 15:30 UTC50m
2026-07-21 ASA954 - Jul 21, 02:00 UTCJul 21, 03:00 UTC1h 0m
2026-07-20 ASA971 SFO → SEA Jul 20, 15:30 UTCJul 20, 16:30 UTC1h 0m
2026-07-20 ASA870 LIH → PDX Jul 20, 02:25 UTCJul 20, 03:40 UTC1h 15m
2026-07-19 ASA870 LIH → PDX Jul 19, 22:50 UTCJul 19, 23:10 UTC20m
2026-07-19 ASA879 SFO → OGG Jul 19, 20:25 UTCJul 19, 20:40 UTC15m
2026-07-19 ASA879 SFO → OGG Jul 19, 15:15 UTCJul 19, 16:05 UTC50m
2026-07-19 ASA880 KOA → SEA Jul 19, 12:30 UTCJul 19, 13:20 UTC50m
2026-07-19 ASA880 KOA → SEA Jul 19, 08:15 UTCJul 19, 08:30 UTC15m
2026-07-19 ASA841 SFO → LAX Jul 19, 06:00 UTCJul 19, 06:20 UTC20m
2026-07-19 ASA841 SFO → LAX Jul 19, 00:50 UTCJul 19, 01:40 UTC50m
2026-07-18 ASA840 BOS → SEA Jul 18, 22:15 UTCJul 18, 23:05 UTC50m
2026-07-18 ASA840 BOS → SEA Jul 18, 18:00 UTCJul 18, 18:10 UTC10m
2026-07-18 ASA854 SJC → SEA Jul 18, 09:25 UTCJul 18, 09:40 UTC15m
2026-07-18 ASA854 SJC → SEA Jul 18, 04:15 UTCJul 18, 05:05 UTC50m
2026-07-18 ASA920 RDU → SEA Jul 18, 01:39 UTCJul 18, 02:19 UTC40m
2026-07-17 ASA920 RDU → SEA Jul 17, 21:30 UTCJul 17, 21:39 UTC10m
2026-07-17 ASA922 - Jul 17, 19:40 UTCJul 17, 19:55 UTC15m
2026-07-17 ASA922 - Jul 17, 14:50 UTCJul 17, 15:40 UTC50m
2026-07-17 ASA921 - Jul 17, 02:50 UTCJul 17, 03:45 UTC55m
2026-07-16 ASA921 - Jul 16, 23:05 UTCJul 16, 23:20 UTC15m
2026-07-16 ASA825 - Jul 16, 21:15 UTCJul 16, 21:25 UTC10m
2026-07-16 ASA825 - Jul 16, 16:15 UTCJul 16, 16:44 UTC30m
2026-07-16 ASA845 - Jul 16, 04:30 UTCJul 16, 05:10 UTC40m
2026-07-15 ASA844 - Jul 15, 17:55 UTCJul 15, 18:20 UTC25m
2026-07-14 ASA964 - Jul 14, 22:00 UTCJul 15, 02:55 UTC4h 54m
2026-07-14 ASA967 - Jul 14, 14:50 UTCJul 14, 19:45 UTC4h 55m
2026-07-13 ASA968 - Jul 13, 23:40 UTCJul 14, 04:30 UTC4h 50m
2026-07-13 ASA963 - Jul 13, 16:40 UTCJul 13, 21:50 UTC5h 10m
2026-07-12 ASA964 - Jul 12, 22:00 UTCJul 13, 03:15 UTC5h 15m
2026-07-12 ASA967 - Jul 12, 15:01 UTCJul 12, 19:45 UTC4h 45m
2026-07-12 ASA924 - Jul 12, 03:30 UTCJul 12, 04:10 UTC40m
2026-07-11 ASA979 - Jul 11, 21:20 UTCJul 11, 21:30 UTC10m
2026-07-11 ASA979 - Jul 11, 16:40 UTCJul 11, 17:10 UTC30m

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 Jul 26, 21:50 UTC.
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 ASA870, ASA965, ASA869, ASA966, ASA920.