Apparatus

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sensors Mode-S transponder

861FA4

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA61AN · BOEING 737-800

Hex
861FA4
Octal
41417644
Decimal
8,789,924
Country
JP
Tail
JA61AN
Type
B738
No current signal · last broadcast 18d ago
Flights observed
371
Distinct callsigns
20
Country
JP
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S 861FA4.

Country allocation

The ICAO 24-bit address 861FA4 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
ANA639 - 6 2026-06-27
ANA632 - 6 2026-06-27
ANA284 - 6 2026-06-23
ANA283 - 6 2026-06-23
ANA734 All Nippon Airways 5 2026-05-22
ANA731 All Nippon Airways 5 2026-05-21
ANA726 - 5 2026-06-23
ANA725 - 5 2026-06-23
ANA410 - 5 2026-06-28
ANA407 - 5 2026-06-28
ANA660 - 4 2026-06-23
ANA657 - 4 2026-06-23
ANA654 All Nippon Airways 4 2026-06-05
ANA638 All Nippon Airways 4 2026-06-12
ANA511 All Nippon Airways 4 2026-05-23
ANA505 All Nippon Airways 4 2026-05-22
ANA376 - 4 2026-06-14
ANA375 All Nippon Airways 4 2026-06-14
ANA321 - 4 2026-06-22
ANA312 - 4 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 AKX5661 - Jun 29, 18:05 UTCJun 29, 20:19 UTC2h 15m
2026-06-29 ANA650 - Jun 29, 11:39 UTCJun 29, 12:45 UTC1h 5m
2026-06-29 ANA647 - Jun 29, 08:54 UTCJun 29, 10:24 UTC1h 30m
2026-06-29 ANA378 - Jun 29, 06:09 UTCJun 29, 07:40 UTC1h 30m
2026-06-29 ANA377 - Jun 29, 03:44 UTCJun 29, 04:55 UTC1h 10m
2026-06-29 ANA454 - Jun 29, 01:10 UTCJun 29, 02:14 UTC1h 5m
2026-06-28 ANA451 - Jun 28, 22:39 UTCJun 28, 23:54 UTC1h 15m
2026-06-28 ANA410 - Jun 28, 11:39 UTCJun 28, 12:25 UTC45m
2026-06-28 ANA407 - Jun 28, 09:50 UTCJun 28, 10:19 UTC30m
2026-06-28 ANA568 - Jun 28, 07:44 UTCJun 28, 08:29 UTC45m
2026-06-28 ANA565 - Jun 28, 05:29 UTCJun 28, 06:20 UTC50m
2026-06-28 ANA406 - Jun 28, 03:29 UTCJun 28, 04:10 UTC40m
2026-06-28 ANA403 - Jun 28, 01:40 UTCJun 28, 02:05 UTC25m
2026-06-27 ANA632 - Jun 27, 23:00 UTCJun 28, 00:09 UTC1h 10m
2026-06-27 ANA639 - Jun 27, 12:04 UTCJun 27, 13:09 UTC1h 5m
2026-06-27 ANA300 - Jun 27, 09:40 UTCJun 27, 10:29 UTC50m
2026-06-27 ANA297 - Jun 27, 07:39 UTCJun 27, 08:20 UTC40m
2026-06-27 ANA636 - Jun 27, 05:10 UTCJun 27, 06:40 UTC1h 30m
2026-06-27 ANA635 - Jun 27, 02:55 UTCJun 27, 03:55 UTC1h 0m
2026-06-26 ANA658 - Jun 26, 09:24 UTCJun 26, 10:35 UTC1h 10m
2026-06-26 ANA380 - Jun 26, 06:29 UTCJun 26, 08:20 UTC1h 50m
2026-06-26 ANA379 - Jun 26, 03:34 UTCJun 26, 05:05 UTC1h 30m
2026-06-26 ANA653 HND → OKJ Jun 26, 01:34 UTCJun 26, 02:30 UTC55m
2026-06-25 ANA792 - Jun 25, 22:59 UTCJun 26, 00:15 UTC1h 15m
2026-06-25 ANA799 - Jun 25, 10:35 UTCJun 25, 11:44 UTC1h 10m
2026-06-25 ANA1896 - Jun 25, 08:40 UTCJun 25, 09:05 UTC25m
2026-06-25 ANA1895 - Jun 25, 07:09 UTCJun 25, 07:30 UTC20m
2026-06-25 ANA796 - Jun 25, 04:40 UTCJun 25, 05:35 UTC55m
2026-06-25 ANA793 - Jun 25, 02:19 UTCJun 25, 03:24 UTC1h 5m
2026-06-25 ANA294 - Jun 25, 00:09 UTCJun 25, 00:59 UTC50m
2026-06-24 ANA291 - Jun 24, 22:14 UTCJun 24, 23:00 UTC45m
2026-06-24 ANA98 KIX → HND Jun 24, 12:40 UTCJun 24, 13:30 UTC50m
2026-06-24 ANA95 HND → KIX Jun 24, 10:55 UTCJun 24, 11:45 UTC50m
2026-06-24 ANA1896 - Jun 24, 08:45 UTCJun 24, 09:24 UTC40m
2026-06-24 ANA1895 - Jun 24, 06:59 UTCJun 24, 07:20 UTC20m
2026-06-24 ANA796 - Jun 24, 04:34 UTCJun 24, 05:34 UTC1h 0m
2026-06-24 ANA793 - Jun 24, 02:20 UTCJun 24, 03:29 UTC1h 10m
2026-06-23 ANA294 - Jun 23, 23:59 UTCJun 24, 00:49 UTC50m
2026-06-23 ANA291 - Jun 23, 22:10 UTCJun 23, 22:55 UTC45m
2026-06-23 ANA660 - Jun 23, 10:55 UTCJun 23, 11:54 UTC1h 0m
2026-06-23 ANA657 - Jun 23, 09:09 UTCJun 23, 09:59 UTC50m
2026-06-23 ANA284 - Jun 23, 06:34 UTCJun 23, 07:35 UTC1h 0m
2026-06-23 ANA283 - Jun 23, 04:45 UTCJun 23, 05:39 UTC55m
2026-06-23 ANA726 - Jun 23, 02:29 UTCJun 23, 03:25 UTC55m
2026-06-23 ANA725 - Jun 23, 00:09 UTCJun 23, 01:10 UTC1h 0m
2026-06-22 ANA312 - Jun 22, 22:24 UTCJun 22, 23:10 UTC45m
2026-06-22 ANA321 - Jun 22, 11:04 UTCJun 22, 11:24 UTC20m
2026-06-22 ANA1104 - Jun 22, 07:19 UTCJun 22, 09:00 UTC1h 40m
2026-06-22 ANA4930 RIS → CTS Jun 22, 05:34 UTCJun 22, 06:00 UTC25m
2026-06-22 ANA4929 - Jun 22, 03:50 UTCJun 22, 04:09 UTC20m

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 JA61AN page for operator, model, and routing details .

Mode-S 861FA4 frequently asked

What is Mode-S code 861FA4?
861FA4 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA61AN.
Where is Mode-S 861FA4 registered?
Mode-S code 861FA4 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 861FA4 broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 861FA4, octal 41417644, decimal 8,789,924.
What flights does 861FA4 operate?
Mode-S 861FA4 has broadcast 20 distinct callsigns, including ANA639, ANA632, ANA284, ANA283, ANA734.