Apparatus

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sensors Mode-S transponder

8681AE

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA73NG · BOEING 737-800

Hex
8681AE
Octal
41500656
Decimal
8,815,022
Country
JP
Tail
JA73NG
Type
B738
No current signal · last broadcast 7h ago
Flights observed
405
Distinct callsigns
20
Country
JP
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 8681AE.

Country allocation

The ICAO 24-bit address 8681AE falls within the block assigned to Japan (JP) by ICAO Annex 10, Volume III. Every aircraft registered in Japan 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
SKY730 Skymark Airlines 7 2026-06-01
SKY531 - 7 2026-06-17
SKY517 - 6 2026-06-15
SKY307 - 6 2026-07-12
SKY179 Skymark Airlines 6 2026-06-01
SKY148 - 6 2026-06-21
SKY145 - 6 2026-06-21
SKY117 Skymark Airlines 6 2026-07-09
SKY022 - 6 2026-07-13
SKY021 - 6 2026-07-13
SKY012 - 6 2026-07-13
SKY009 - 6 2026-07-13
SKY790 - 5 2026-06-17
SKY767 - 5 2026-06-17
SKY766 Skymark Airlines 5 2026-06-17
SKY703 - 5 2026-06-16
SKY552 - 5 2026-07-14
SKY520 - 5 2026-07-14
SKY514 - 5 2026-06-18
SKY513 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKY520 - Jul 14, 08:20 UTCJul 14, 10:35 UTC2h 15m
2026-07-14 SKY557 - Jul 14, 05:10 UTCJul 14, 06:50 UTC1h 40m
2026-07-14 SKY552 - Jul 14, 02:20 UTCJul 14, 04:00 UTC1h 40m
2026-07-14 SKY513 - Jul 14, 00:50 UTCJul 14, 01:10 UTC20m
2026-07-13 SKY513 - Jul 13, 23:05 UTCJul 13, 23:45 UTC40m
2026-07-13 SKY022 - Jul 13, 11:00 UTCJul 13, 12:20 UTC1h 20m
2026-07-13 SKY021 - Jul 13, 07:50 UTCJul 13, 08:50 UTC1h 0m
2026-07-13 SKY012 - Jul 13, 05:10 UTCJul 13, 06:35 UTC1h 25m
2026-07-13 SKY009 - Jul 13, 02:40 UTCJul 13, 03:40 UTC1h 0m
2026-07-13 SKY004 - Jul 13, 00:05 UTCJul 13, 01:25 UTC1h 20m
2026-07-12 SKY001 - Jul 12, 21:40 UTCJul 12, 22:40 UTC1h 0m
2026-07-12 SKY307 HND → HND Jul 12, 07:10 UTCJul 12, 12:55 UTC5h 45m
2026-07-12 SKY108 - Jul 12, 04:15 UTCJul 12, 05:10 UTC55m
2026-07-12 SKY142 - Jul 12, 02:25 UTCJul 12, 03:15 UTC50m
2026-07-12 SKY141 - Jul 12, 00:35 UTCJul 12, 01:30 UTC55m
2026-07-11 SKY183 - Jul 11, 22:45 UTCJul 11, 23:45 UTC1h 0m
2026-07-11 SKY836 - Jul 11, 09:45 UTCJul 11, 11:05 UTC1h 20m
2026-07-11 SKY831 - Jul 11, 01:10 UTCJul 11, 02:20 UTC1h 10m
2026-07-10 SKY182 - Jul 10, 23:25 UTCJul 11, 00:15 UTC50m
2026-07-09 SKY117 HND → UKB Jul 9, 11:25 UTCJul 9, 12:10 UTC45m
2026-07-09 SKY020 - Jul 9, 08:55 UTCJul 9, 10:25 UTC1h 30m
2026-07-09 SKY019 - Jul 9, 06:35 UTCJul 9, 07:40 UTC1h 5m
2026-07-09 SKY712 - Jul 9, 03:15 UTCJul 9, 04:30 UTC1h 15m
2026-07-09 SKY175 - Jul 9, 00:40 UTCJul 9, 02:20 UTC1h 40m
2026-07-08 SKY140 - Jul 8, 22:45 UTCJul 8, 23:35 UTC50m
2026-07-08 SKY147 - Jul 8, 11:05 UTCJul 8, 11:55 UTC50m
2026-07-08 SKY113 HND → UKB Jul 8, 09:20 UTCJul 8, 10:15 UTC55m
2026-07-08 SKY014 - Jul 8, 06:05 UTCJul 8, 07:40 UTC1h 35m
2026-07-08 SKY011 - Jul 8, 03:05 UTCJul 8, 04:10 UTC1h 5m
2026-07-08 SKY302 - Jul 8, 00:50 UTCJul 8, 01:55 UTC1h 5m
2026-07-07 SKY635 - Jul 7, 21:45 UTCJul 7, 22:25 UTC40m
2026-07-07 SKY638 KOJ → NGO Jul 7, 12:45 UTCJul 7, 13:25 UTC40m
2026-07-07 SKY309 - Jul 7, 10:15 UTCJul 7, 11:15 UTC1h 0m
2026-07-07 SKY018 - Jul 7, 07:25 UTCJul 7, 08:40 UTC1h 15m
2026-07-07 SKY015 - Jul 7, 05:10 UTCJul 7, 06:15 UTC1h 5m
2026-07-07 SKY303 - Jul 7, 00:30 UTCJul 7, 04:05 UTC3h 35m
2026-07-06 SKY308 KOJ → HND Jul 6, 11:35 UTCJul 6, 12:45 UTC1h 10m
2026-07-06 SKY307 - Jul 6, 06:50 UTCJul 6, 08:00 UTC1h 10m
2026-07-06 SKY102 - Jul 6, 00:30 UTCJul 6, 01:20 UTC50m
2026-07-05 SKY101 HND → UKB Jul 5, 22:35 UTCJul 5, 23:30 UTC55m
2026-07-05 SKY022 - Jul 5, 10:05 UTCJul 5, 11:25 UTC1h 20m
2026-07-05 SKY021 - Jul 5, 07:25 UTCJul 5, 08:35 UTC1h 10m
2026-07-05 SKY102 - Jul 5, 00:30 UTCJul 5, 01:15 UTC45m
2026-07-04 SKY101 HND → UKB Jul 4, 22:35 UTCJul 4, 23:25 UTC50m
2026-07-04 SKY106 - Jul 4, 02:25 UTCJul 4, 03:25 UTC1h 0m
2026-07-04 SKY103 HND → UKB Jul 4, 00:35 UTCJul 4, 01:25 UTC50m
2026-06-22 SKY7014 - Jun 22, 13:14 UTCJun 22, 14:10 UTC55m
2026-06-21 SKY148 - Jun 21, 07:59 UTCJun 21, 08:49 UTC50m
2026-06-21 SKY145 - Jun 21, 06:04 UTCJun 21, 06:55 UTC50m
2026-06-21 SKY105 - Jun 21, 04:24 UTCJun 21, 05:20 UTC55m

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 JA73NG page for operator, model, and routing details .

Mode-S 8681AE frequently asked

What is Mode-S code 8681AE?
8681AE is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA73NG.
Where is Mode-S 8681AE registered?
Mode-S code 8681AE is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8681AE broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8681AE, octal 41500656, decimal 8,815,022.
What flights does 8681AE operate?
Mode-S 8681AE has broadcast 20 distinct callsigns, including SKY730, SKY531, SKY517, SKY307, SKY179.