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
Broadcasting now · callsign SKY712 · 8,050 ft
Flights observed
475
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 12:25 UTC

Current position

8681AE is currently broadcasting. Map zoomed to live position.

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
SKY593 Skymark Airlines 5 2026-07-23
SKY552 - 5 2026-07-14
SKY523 Skymark Airlines 5 2026-07-19
SKY520 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKY138 KOJ → UKB Jul 26, 11:45 UTCJul 26, 12:20 UTC35m
2026-07-26 SKY135 UKB → KOJ Jul 26, 06:35 UTCJul 26, 07:05 UTC30m
2026-07-26 SKY136 KOJ → UKB Jul 26, 05:15 UTCJul 26, 05:50 UTC35m
2026-07-26 SKY637 NGO → KOJ Jul 26, 03:10 UTCJul 26, 03:50 UTC40m
2026-07-26 SKY762 CTS → NGO Jul 26, 00:40 UTCJul 26, 02:00 UTC1h 20m
2026-07-25 SKY761 NGO → CTS Jul 25, 22:20 UTCJul 25, 23:45 UTC1h 25m
2026-07-25 SKY768 - Jul 25, 11:50 UTCJul 25, 13:10 UTC1h 20m
2026-07-25 SKY727 HND → CTS Jul 25, 09:40 UTCJul 25, 11:00 UTC1h 20m
2026-07-25 SKY954 CTS → HND Jul 25, 05:15 UTCJul 25, 07:15 UTC2h 0m
2026-07-24 SKY955 HND → CTS Jul 24, 23:55 UTCJul 25, 02:10 UTC2h 15m
2026-07-24 SKY726 - Jul 24, 11:00 UTCJul 24, 12:15 UTC1h 15m
2026-07-24 SKY723 HND → CTS Jul 24, 08:20 UTCJul 24, 09:40 UTC1h 20m
2026-07-24 SKY518 OKA → HND Jul 24, 05:00 UTCJul 24, 07:10 UTC2h 10m
2026-07-24 SKY542 SHI → OKA Jul 24, 03:35 UTCJul 24, 03:50 UTC15m
2026-07-24 SKY501 FUK → OKA Jul 24, 00:35 UTCJul 24, 00:55 UTC20m
2026-07-23 SKY501 FUK → OKA Jul 23, 23:40 UTCJul 23, 23:50 UTC10m
2026-07-23 SKY508 OKA → FUK Jul 23, 10:50 UTCJul 23, 11:55 UTC1h 5m
2026-07-23 SKY509 - Jul 23, 09:30 UTCJul 23, 09:45 UTC15m
2026-07-23 SKY509 - Jul 23, 08:35 UTCJul 23, 08:45 UTC10m
2026-07-23 SKY506 - Jul 23, 06:10 UTCJul 23, 07:20 UTC1h 10m
2026-07-23 SKY593 UKB → OKA Jul 23, 04:50 UTCJul 23, 05:05 UTC15m
2026-07-23 SKY593 UKB → OKA Jul 23, 03:30 UTCJul 23, 04:10 UTC40m
2026-07-23 SKY153 SDJ → UKB Jul 23, 01:00 UTCJul 23, 02:00 UTC1h 0m
2026-07-22 SKY152 - Jul 22, 22:55 UTCJul 22, 23:50 UTC55m
2026-07-22 SKY714 CTS → HND Jul 22, 04:40 UTCJul 22, 11:50 UTC7h 10m
2026-07-22 SKY711 HND → CTS Jul 22, 02:30 UTCJul 22, 03:45 UTC1h 15m
2026-07-22 SKY102 UKB → HND Jul 22, 00:35 UTCJul 22, 01:30 UTC55m
2026-07-21 SKY101 - Jul 21, 22:45 UTCJul 21, 23:35 UTC50m
2026-07-21 SKY618 - Jul 21, 08:45 UTCJul 21, 10:55 UTC2h 10m
2026-07-21 SKY503 - Jul 21, 05:25 UTCJul 21, 05:40 UTC15m
2026-07-21 SKY503 - Jul 21, 04:25 UTCJul 21, 04:40 UTC15m
2026-07-21 SKY502 OKA → FUK Jul 21, 01:35 UTCJul 21, 02:40 UTC1h 5m
2026-07-21 SKY591 - Jul 21, 00:05 UTCJul 21, 00:20 UTC15m
2026-07-20 SKY591 - Jul 20, 22:40 UTCJul 20, 23:20 UTC40m
2026-07-20 SKY187 - Jul 20, 10:55 UTCJul 20, 12:00 UTC1h 5m
2026-07-20 SKY794 CTS → IBR Jul 20, 09:05 UTCJul 20, 10:10 UTC1h 5m
2026-07-20 SKY765 - Jul 20, 06:45 UTCJul 20, 08:10 UTC1h 25m
2026-07-20 SKY636 KOJ → NGO Jul 20, 04:50 UTCJul 20, 05:30 UTC40m
2026-07-20 SKY131 UKB → KOJ Jul 20, 00:05 UTCJul 20, 00:35 UTC30m
2026-07-19 SKY590 OKA → UKB Jul 19, 21:35 UTCJul 19, 23:10 UTC1h 35m
2026-07-19 SKY523 HND → OKA Jul 19, 09:45 UTCJul 19, 11:55 UTC2h 10m
2026-07-19 SKY112 UKB → HND Jul 19, 07:25 UTCJul 19, 08:35 UTC1h 10m
2026-07-19 SKY185 - Jul 19, 05:25 UTCJul 19, 06:20 UTC55m
2026-07-19 SKY184 - Jul 19, 03:30 UTCJul 19, 04:30 UTC1h 0m
2026-07-19 SKY170 - Jul 19, 01:00 UTCJul 19, 02:40 UTC1h 40m
2026-07-18 SKY171 - Jul 18, 22:35 UTCJul 19, 00:10 UTC1h 35m
2026-07-18 SKY187 - Jul 18, 11:25 UTCJul 18, 12:25 UTC1h 0m
2026-07-18 SKY794 - Jul 18, 09:30 UTCJul 18, 10:30 UTC1h 0m
2026-07-18 SKY765 - Jul 18, 06:50 UTCJul 18, 08:20 UTC1h 30m
2026-07-18 SKY131 - Jul 18, 00:00 UTCJul 18, 05:35 UTC5h 36m

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?
Yes. Mode-S 8681AE is currently airborne.
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.