sensors Mode-S transponder

847C18

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA19JJ · AIRBUS A-320

Hex
847C18
Octal
41076030
Decimal
8,682,520
Country
JP
Tail
JA19JJ
Type
A320
Broadcasting now · callsign JJP127 · 1,300 ft
Flights observed
11
Distinct callsigns
6
Country
JP
Last broadcast
15h ago

Current position

847C18 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 847C18 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 6 distinct

Callsign Airline Flights Last seen
JJP18 Jetstar Japan 3 2026-04-14
JJP234 Jetstar Japan 2 2026-04-13
JJP156 - 2 2026-04-13
JJP125 Jetstar Japan 2 2026-04-13
JJP126 - 1 2026-04-13
JJP113 - 1 2026-04-13

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 JJP18 KHH → NRT Apr 14, 09:10 UTCApr 14, 09:25 UTC15m
2026-04-14 JJP18 KHH → NRT Apr 14, 08:35 UTCApr 14, 09:05 UTC30m
2026-04-14 JJP18 KHH → NRT Apr 14, 06:20 UTCApr 14, 07:00 UTC40m
2026-04-13 JJP234 KIX → NRT Apr 13, 11:55 UTCApr 13, 12:10 UTC15m
2026-04-13 JJP234 KIX → NRT Apr 13, 11:25 UTCApr 13, 12:10 UTC45m
2026-04-13 JJP156 - Apr 13, 08:20 UTCApr 13, 09:50 UTC1h 30m
2026-04-13 JJP156 - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m
2026-04-13 JJP113 NRT → CTS Apr 13, 05:30 UTCApr 13, 06:50 UTC1h 20m
2026-04-13 JJP126 - Apr 13, 02:40 UTCApr 13, 04:00 UTC1h 20m
2026-04-13 JJP125 NRT → CTS Apr 13, 00:20 UTCApr 13, 01:30 UTC1h 10m
2026-04-13 JJP125 NRT → CTS Apr 13, 00:05 UTCApr 13, 01:30 UTC1h 25m

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 JA19JJ page for operator, model, and routing details .

Mode-S 847C18 frequently asked

What is Mode-S code 847C18?
847C18 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA19JJ.
Where is Mode-S 847C18 registered?
Mode-S code 847C18 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 847C18 broadcasting right now?
Yes. Mode-S 847C18 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 847C18, octal 41076030, decimal 8,682,520.
What flights does 847C18 operate?
Mode-S 847C18 has broadcast 6 distinct callsigns, including JJP18, JJP234, JJP156, JJP125, JJP126.