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sensors Mode-S transponder

A1D07C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N216HA · AIRBUS A-321neo · operated by HAWAIIAN AIRLINES INC

Hex
A1D07C
Octal
50350174
Decimal
10,604,668
Country
US
Tail
N216HA
Type
A21N
No current signal · last broadcast Jul 26, 16:45 UTC
Flights observed
305
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 16:45 UTC

Last known position

Most recent position reported by Mode-S A1D07C.

Country allocation

The ICAO 24-bit address A1D07C 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 - 23 2026-07-14
ASA869 - 15 2026-07-15
ASA971 - 11 2026-07-03
ASA920 Alaska Airlines 10 2026-07-24
ASA967 Alaska Airlines 8 2026-06-10
ASA964 Alaska Airlines 8 2026-06-11
ASA924 - 8 2026-07-11
ASA879 - 8 2026-07-17
ASA825 Alaska Airlines 8 2026-07-25
ASA965 - 7 2026-07-06
ASA923 - 7 2026-07-11
ASA888 Alaska Airlines 7 2026-05-27
ASA847 Alaska Airlines 7 2026-05-12
ASA968 Alaska Airlines 6 2026-06-11
ASA963 Alaska Airlines 6 2026-06-11
ASA921 Alaska Airlines 6 2026-07-22
ASA880 Alaska Airlines 6 2026-07-17
ASA841 Alaska Airlines 6 2026-07-20
ASA839 - 6 2026-07-16
ASA932 - 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA959 SEA → GEG Jul 26, 15:50 UTCJul 26, 16:45 UTC55m
2026-07-26 ASA966 GEG → SEA Jul 26, 03:05 UTCJul 26, 04:05 UTC1h 0m
2026-07-25 ASA966 GEG → SEA Jul 25, 23:25 UTCJul 25, 23:40 UTC15m
2026-07-25 ASA825 SEA → OGG Jul 25, 21:35 UTCJul 25, 21:40 UTC5m
2026-07-25 ASA825 SEA → OGG Jul 25, 16:40 UTCJul 25, 17:10 UTC30m
2026-07-25 ASA845 SEA → GEG Jul 25, 04:45 UTCJul 25, 05:45 UTC1h 0m
2026-07-24 ASA844 LAX → PDX Jul 24, 23:10 UTCJul 24, 23:20 UTC10m
2026-07-24 ASA844 LAX → PDX Jul 24, 18:20 UTCJul 24, 18:50 UTC30m
2026-07-24 ASA853 - Jul 24, 11:35 UTCJul 24, 16:25 UTC4h 50m
2026-07-24 ASA854 SJC → SEA Jul 24, 04:15 UTCJul 24, 09:45 UTC5h 30m
2026-07-24 ASA920 RDU → SEA Jul 24, 01:35 UTCJul 24, 02:15 UTC40m
2026-07-23 ASA920 RDU → SEA Jul 23, 21:25 UTCJul 23, 21:35 UTC10m
2026-07-23 ASA922 SFO → SEA Jul 23, 19:40 UTCJul 23, 19:55 UTC15m
2026-07-23 ASA922 SFO → SEA Jul 23, 14:35 UTCJul 23, 15:20 UTC45m
2026-07-22 ASA956 PDX → SEA Jul 22, 21:15 UTCJul 23, 01:40 UTC4h 25m
2026-07-22 ASA955 - Jul 22, 14:05 UTCJul 22, 19:10 UTC5h 5m
2026-07-22 ASA921 PDX → FLL Jul 22, 02:50 UTCJul 22, 03:35 UTC45m
2026-07-21 ASA921 PDX → FLL Jul 21, 23:10 UTCJul 21, 23:25 UTC15m
2026-07-21 ASA825 SEA → OGG Jul 21, 21:40 UTCJul 21, 21:50 UTC10m
2026-07-21 ASA825 SEA → OGG Jul 21, 16:35 UTCJul 21, 17:00 UTC25m
2026-07-21 ASA845 SEA → GEG Jul 21, 04:15 UTCJul 21, 05:50 UTC1h 35m
2026-07-20 ASA844 LAX → PDX Jul 20, 17:35 UTCJul 20, 18:35 UTC1h 0m
2026-07-20 ASA853 - Jul 20, 13:40 UTCJul 20, 15:15 UTC1h 35m
2026-07-20 ASA841 SFO → LAX Jul 20, 06:10 UTCJul 20, 06:25 UTC15m
2026-07-20 ASA841 SFO → LAX Jul 20, 00:50 UTCJul 20, 01:40 UTC50m
2026-07-19 ASA840 BOS → SEA Jul 19, 22:15 UTCJul 19, 23:05 UTC50m
2026-07-19 ASA896 HNL → SEA Jul 19, 04:10 UTCJul 19, 04:35 UTC25m
2026-07-18 ASA895 SAN → HNL Jul 18, 03:05 UTCJul 18, 03:45 UTC40m
2026-07-17 ASA879 - Jul 17, 20:35 UTCJul 17, 21:00 UTC25m
2026-07-17 ASA879 - Jul 17, 15:35 UTCJul 17, 16:29 UTC55m
2026-07-17 ASA880 KOA → SEA Jul 17, 12:50 UTCJul 17, 13:35 UTC45m
2026-07-17 ASA880 KOA → SEA Jul 17, 08:35 UTCJul 17, 08:49 UTC15m
2026-07-17 ASA841 SFO → LAX Jul 17, 06:25 UTCJul 17, 06:40 UTC15m
2026-07-17 ASA841 SFO → LAX Jul 17, 01:15 UTCJul 17, 02:05 UTC50m
2026-07-16 ASA840 - Jul 16, 22:15 UTCJul 16, 22:59 UTC45m
2026-07-16 ASA840 - Jul 16, 18:00 UTCJul 16, 18:15 UTC15m
2026-07-16 ASA855 - Jul 16, 09:30 UTCJul 16, 09:45 UTC15m
2026-07-16 ASA855 - Jul 16, 04:20 UTCJul 16, 05:15 UTC55m
2026-07-16 ASA839 - Jul 16, 01:50 UTCJul 16, 02:40 UTC50m
2026-07-15 ASA839 - Jul 15, 21:25 UTCJul 15, 21:45 UTC20m
2026-07-15 ASA869 - Jul 15, 14:15 UTCJul 15, 19:45 UTC5h 30m
2026-07-14 ASA870 - Jul 14, 22:50 UTCJul 15, 03:35 UTC4h 45m
2026-07-14 ASA9285 - Jul 14, 09:55 UTCJul 14, 10:10 UTC15m
2026-07-14 ASA9285 - Jul 14, 04:45 UTCJul 14, 05:30 UTC45m
2026-07-13 ASA839 - Jul 13, 01:05 UTCJul 13, 02:10 UTC1h 5m
2026-07-12 ASA839 - Jul 12, 20:30 UTCJul 12, 20:50 UTC20m
2026-07-12 ASA843 SFO → HNL Jul 12, 02:55 UTCJul 12, 07:40 UTC4h 45m
2026-07-11 ASA923 OAK → SFO Jul 11, 14:10 UTCJul 12, 01:20 UTC11h 10m
2026-07-11 ASA924 - Jul 11, 03:15 UTCJul 11, 03:50 UTC35m
2026-07-10 ASA979 FAT → SEA Jul 10, 16:45 UTCJul 10, 17:20 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 N216HA page for operator, model, and routing details .

Mode-S A1D07C frequently asked

What is Mode-S code A1D07C?
A1D07C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N216HA.
Where is Mode-S A1D07C registered?
Mode-S code A1D07C 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 A1D07C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1D07C, octal 50350174, decimal 10,604,668.
What flights does A1D07C operate?
Mode-S A1D07C has broadcast 20 distinct callsigns, including ASA870, ASA869, ASA971, ASA920, ASA967.