Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

84CEFA

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA27MC · AIRBUS A-320

Hex
84CEFA
Octal
41147372
Decimal
8,703,738
Country
JP
Tail
JA27MC
Type
A320
Broadcasting now · callsign SFJ99 · 37,000 ft
Flights observed
561
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 14:15 UTC

Current position

84CEFA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 84CEFA 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
SFJ99 Star Flyer 18 2026-07-21
SFJ98 - 18 2026-07-21
SFJ97 Star Flyer 18 2026-07-22
SFJ15 Star Flyer 18 2026-07-24
SFJ96 Star Flyer 17 2026-07-23
SFJ93 - 17 2026-07-16
SFJ51 - 17 2026-07-16
SFJ16 Star Flyer 17 2026-07-24
SFJ77 - 16 2026-07-16
SFJ52 - 16 2026-07-16
SFJ14 Star Flyer 16 2026-07-24
SFJ13 Star Flyer 16 2026-07-24
SFJ76 - 15 2026-07-16
SFJ82 - 13 2026-07-16
SFJ11 Star Flyer 12 2026-07-23
SFJ54 - 11 2026-07-23
SFJ53 Star Flyer 11 2026-07-23
SFJ50 Star Flyer 11 2026-07-23
SFJ22 - 11 2026-06-28
SFJ12 Star Flyer 11 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SFJ91 HND → KKJ Jul 26, 13:10 UTCJul 26, 14:15 UTC1h 5m
2026-07-26 SFJ0028 KIX → HND Jul 26, 11:15 UTCJul 26, 12:10 UTC55m
2026-07-26 SFJ0027 HND → KIX Jul 26, 08:15 UTCJul 26, 09:15 UTC1h 0m
2026-07-26 SFJ0024 KIX → HND Jul 26, 06:25 UTCJul 26, 07:15 UTC51m
2026-07-26 SFJ23 HND → KIX Jul 26, 03:20 UTCJul 26, 04:15 UTC55m
2026-07-26 SFJ42 FUK → HND Jul 26, 00:35 UTCJul 26, 02:00 UTC1h 25m
2026-07-25 SFJ41 HND → FUK Jul 25, 21:50 UTCJul 25, 23:00 UTC1h 10m
2026-07-25 SFJ92 KKJ → HND Jul 25, 12:45 UTCJul 25, 13:55 UTC1h 10m
2026-07-25 SFJ87 HND → KKJ Jul 25, 10:35 UTCJul 25, 11:40 UTC1h 5m
2026-07-25 SFJ86 KKJ → HND Jul 25, 08:15 UTCJul 25, 09:30 UTC1h 15m
2026-07-25 SFJ81 HND → KKJ Jul 25, 05:25 UTCJul 25, 06:30 UTC1h 5m
2026-07-25 SFJ80 KKJ → HND Jul 25, 02:50 UTCJul 25, 04:15 UTC1h 25m
2026-07-25 SFJ75 HND → KKJ Jul 25, 00:30 UTCJul 25, 01:35 UTC1h 5m
2026-07-24 SFJ72 KKJ → HND Jul 24, 22:10 UTCJul 24, 23:20 UTC1h 10m
2026-07-24 SFJ95 HND → KKJ Jul 24, 14:50 UTCJul 24, 15:50 UTC1h 0m
2026-07-24 SFJ16 UBJ → HND Jul 24, 11:55 UTCJul 24, 13:10 UTC1h 15m
2026-07-24 SFJ15 HND → UBJ Jul 24, 09:40 UTCJul 24, 10:45 UTC1h 5m
2026-07-24 SFJ14 UBJ → HND Jul 24, 06:55 UTCJul 24, 08:10 UTC1h 15m
2026-07-24 SFJ13 HND → UBJ Jul 24, 04:25 UTCJul 24, 05:30 UTC1h 5m
2026-07-24 SFJ12 UBJ → HND Jul 24, 00:50 UTCJul 24, 02:10 UTC1h 20m
2026-07-23 SFJ11 HND → UBJ Jul 23, 22:45 UTCJul 23, 23:50 UTC1h 5m
2026-07-23 SFJ54 - Jul 23, 12:30 UTCJul 23, 13:50 UTC1h 20m
2026-07-23 SFJ53 HND → FUK Jul 23, 10:00 UTCJul 23, 11:05 UTC1h 5m
2026-07-23 SFJ50 FUK → HND Jul 23, 07:35 UTCJul 23, 09:10 UTC1h 35m
2026-07-23 SFJ96 SDJ → FUK Jul 23, 01:55 UTCJul 23, 03:40 UTC1h 45m
2026-07-22 SFJ97 FUK → SDJ Jul 22, 23:15 UTCJul 23, 00:30 UTC1h 15m
2026-07-22 SFJ96 SDJ → FUK Jul 22, 02:10 UTCJul 22, 03:40 UTC1h 30m
2026-07-21 SFJ97 FUK → SDJ Jul 21, 23:20 UTCJul 22, 00:35 UTC1h 15m
2026-07-21 SFJ98 - Jul 21, 10:15 UTCJul 21, 11:30 UTC1h 15m
2026-07-21 SFJ99 FUK → SDJ Jul 21, 07:15 UTCJul 21, 08:30 UTC1h 15m
2026-07-21 SFJ0096 SDJ → FUK Jul 21, 01:45 UTCJul 21, 03:00 UTC1h 15m
2026-07-20 SFJ97 FUK → SDJ Jul 20, 23:10 UTCJul 21, 00:30 UTC1h 20m
2026-07-20 SFJ98 - Jul 20, 10:25 UTCJul 20, 11:35 UTC1h 10m
2026-07-20 SFJ99 FUK → SDJ Jul 20, 07:25 UTCJul 20, 08:40 UTC1h 15m
2026-07-20 SFJ96 - Jul 20, 01:45 UTCJul 20, 02:55 UTC1h 10m
2026-07-19 SFJ97 - Jul 19, 23:15 UTCJul 20, 00:30 UTC1h 15m
2026-07-19 SFJ98 - Jul 19, 10:25 UTCJul 19, 11:50 UTC1h 25m
2026-07-19 SFJ99 - Jul 19, 07:30 UTCJul 19, 08:45 UTC1h 15m
2026-07-19 SFJ96 - Jul 19, 01:45 UTCJul 19, 02:55 UTC1h 10m
2026-07-18 SFJ97 - Jul 18, 23:10 UTCJul 19, 00:30 UTC1h 20m
2026-07-18 SFJ57 HND → FUK Jul 18, 09:15 UTCJul 18, 10:15 UTC1h 0m
2026-07-17 SFJ56 FUK → HND Jul 17, 12:04 UTCJul 17, 13:29 UTC1h 25m
2026-07-17 SFJ57 HND → FUK Jul 17, 09:15 UTCJul 17, 10:20 UTC1h 5m
2026-07-17 SFJ32 FUK → HND Jul 17, 01:25 UTCJul 17, 02:59 UTC1h 35m
2026-07-16 SFJ93 - Jul 16, 12:44 UTCJul 16, 13:49 UTC1h 5m
2026-07-16 SFJ52 - Jul 16, 10:25 UTCJul 16, 11:50 UTC1h 25m
2026-07-16 SFJ51 - Jul 16, 07:40 UTCJul 16, 08:55 UTC1h 15m
2026-07-16 SFJ82 - Jul 16, 05:10 UTCJul 16, 06:25 UTC1h 15m
2026-07-16 SFJ77 - Jul 16, 02:40 UTCJul 16, 03:45 UTC1h 5m
2026-07-16 SFJ76 - Jul 16, 00:20 UTCJul 16, 01:30 UTC1h 10m

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 JA27MC page for operator, model, and routing details .

Mode-S 84CEFA frequently asked

What is Mode-S code 84CEFA?
84CEFA is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA27MC.
Where is Mode-S 84CEFA registered?
Mode-S code 84CEFA is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 84CEFA broadcasting right now?
Yes. Mode-S 84CEFA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 84CEFA, octal 41147372, decimal 8,703,738.
What flights does 84CEFA operate?
Mode-S 84CEFA has broadcast 20 distinct callsigns, including SFJ99, SFJ98, SFJ97, SFJ15, SFJ96.