Apparatus

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sensors Mode-S transponder

851CCA

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA348J · BOEING 737-800

Hex
851CCA
Octal
41216312
Decimal
8,723,658
Country
JP
Tail
JA348J
Type
B738
No current signal · last broadcast Jul 26, 13:00 UTC
Flights observed
410
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 13:00 UTC

Last known position

Most recent position reported by Mode-S 851CCA.

Country allocation

The ICAO 24-bit address 851CCA 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
JTA63 - 15 2026-07-20
JTA5 - 14 2026-07-26
JTA9 - 12 2026-07-26
JTA53 - 11 2026-07-09
JTA1 - 11 2026-07-26
JTA58 - 10 2026-07-20
JTA57 Japan Transocean Air 10 2026-05-20
JTA52 - 10 2026-06-28
JTA45 Japan Transocean Air 10 2026-07-25
JTA44 - 10 2026-07-05
JTA16 - 10 2026-07-09
JTA50 Japan Transocean Air 9 2026-07-08
JAL971 - 9 2026-06-29
JTA83 Japan Transocean Air 8 2026-07-20
JTA49 - 8 2026-07-05
JTA46 Japan Transocean Air 8 2026-07-20
JTA42 - 8 2026-07-04
JTA37 - 8 2026-07-14
JTA36 - 8 2026-07-14
JTA128 - 8 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JTA9 - Jul 26, 12:45 UTCJul 26, 13:00 UTC15m
2026-07-26 JTA9 - Jul 26, 11:30 UTCJul 26, 12:05 UTC35m
2026-07-26 JTA8 - Jul 26, 08:30 UTCJul 26, 10:00 UTC1h 30m
2026-07-26 JTA5 - Jul 26, 05:20 UTCJul 26, 06:55 UTC1h 36m
2026-07-26 JTA004 - Jul 26, 02:30 UTCJul 26, 04:10 UTC1h 40m
2026-07-26 JTA1 - Jul 26, 00:55 UTCJul 26, 01:05 UTC10m
2026-07-25 JTA1 - Jul 25, 23:35 UTCJul 26, 00:10 UTC35m
2026-07-25 JTA86 - Jul 25, 11:40 UTCJul 25, 13:15 UTC1h 35m
2026-07-25 JTA45 NGO → OKA Jul 25, 01:15 UTCJul 25, 01:40 UTC25m
2026-07-24 JTA45 NGO → OKA Jul 24, 23:55 UTCJul 25, 00:15 UTC20m
2026-07-24 JTA48 OKA → NGO Jul 24, 11:45 UTCJul 24, 13:10 UTC1h 25m
2026-07-24 JTA572 MMY → OKA Jul 24, 10:25 UTCJul 24, 10:40 UTC15m
2026-07-24 JTA562 MMY → OKA Jul 24, 07:05 UTCJul 24, 07:20 UTC15m
2026-07-24 JTA600 ISG → OKA Jul 24, 00:40 UTCJul 24, 00:55 UTC15m
2026-07-23 JTA65 FUK → OKA Jul 23, 13:05 UTCJul 23, 13:20 UTC15m
2026-07-23 JTA65 FUK → OKA Jul 23, 12:10 UTCJul 23, 12:20 UTC10m
2026-07-23 JTA60 OKA → FUK Jul 23, 09:55 UTCJul 23, 11:00 UTC1h 5m
2026-07-23 JTA61 FUK → OKA Jul 23, 08:20 UTCJul 23, 08:40 UTC20m
2026-07-23 JTA54 OKA → FUK Jul 23, 05:40 UTCJul 23, 06:00 UTC20m
2026-07-23 JTA54 OKA → FUK Jul 23, 04:50 UTCJul 23, 05:05 UTC15m
2026-07-22 JTA43 NGO → OKA Jul 22, 22:45 UTCJul 23, 00:20 UTC1h 35m
2026-07-22 JTA48 - Jul 22, 11:40 UTCJul 22, 13:15 UTC1h 35m
2026-07-22 JTA4 - Jul 22, 02:20 UTCJul 22, 03:55 UTC1h 35m
2026-07-21 JTA1 - Jul 21, 23:30 UTCJul 22, 01:10 UTC1h 40m
2026-07-21 JTA86 - Jul 21, 11:25 UTCJul 21, 13:10 UTC1h 45m
2026-07-21 JTA622 ISG → OKA Jul 21, 08:10 UTCJul 21, 08:20 UTC10m
2026-07-21 - - Jul 21, 04:15 UTCJul 21, 04:25 UTC10m
2026-07-20 JTA45 NGO → OKA Jul 20, 23:50 UTCJul 21, 01:30 UTC1h 40m
2026-07-20 JTA46 OKA → NGO Jul 20, 11:10 UTCJul 20, 12:40 UTC1h 30m
2026-07-20 JTA63 - Jul 20, 09:45 UTCJul 20, 10:00 UTC15m
2026-07-20 JTA63 - Jul 20, 08:50 UTCJul 20, 09:00 UTC10m
2026-07-20 JTA58 - Jul 20, 06:15 UTCJul 20, 07:20 UTC1h 5m
2026-07-20 JTA612 ISG → OKA Jul 20, 04:50 UTCJul 20, 05:00 UTC10m
2026-07-20 JTA83 KIX → ISG Jul 20, 01:15 UTCJul 20, 02:50 UTC1h 35m
2026-07-19 JTA2 - Jul 19, 22:25 UTCJul 20, 00:00 UTC1h 35m
2026-07-19 JTA5 - Jul 19, 06:45 UTCJul 19, 07:00 UTC15m
2026-07-19 JTA5 - Jul 19, 05:20 UTCJul 19, 06:00 UTC40m
2026-07-19 JTA4 - Jul 19, 02:25 UTCJul 19, 04:05 UTC1h 40m
2026-07-18 JTA1 - Jul 18, 23:35 UTCJul 19, 01:10 UTC1h 35m
2026-07-18 JTA86 - Jul 18, 11:30 UTCJul 18, 13:05 UTC1h 35m
2026-07-18 JTA622 - Jul 18, 08:05 UTCJul 18, 08:15 UTC10m
2026-07-18 JTA212 - Jul 18, 04:30 UTCJul 18, 04:40 UTC10m
2026-07-18 JTA45 - Jul 18, 00:00 UTCJul 18, 01:50 UTC1h 50m
2026-07-17 JTA46 - Jul 17, 10:55 UTCJul 17, 12:35 UTC1h 40m
2026-07-17 JTA63 - Jul 17, 09:30 UTCJul 17, 09:50 UTC20m
2026-07-17 JTA63 - Jul 17, 08:40 UTCJul 17, 08:49 UTC10m
2026-07-17 JTA58 - Jul 17, 07:14 UTCJul 17, 07:30 UTC15m
2026-07-17 JTA58 - Jul 17, 06:20 UTCJul 17, 06:35 UTC15m
2026-07-17 JTA83 - Jul 17, 01:09 UTCJul 17, 02:39 UTC1h 30m
2026-07-16 JTA2 - Jul 16, 22:25 UTCJul 16, 23:59 UTC1h 35m

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 JA348J page for operator, model, and routing details .

Mode-S 851CCA frequently asked

What is Mode-S code 851CCA?
851CCA is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA348J.
Where is Mode-S 851CCA registered?
Mode-S code 851CCA is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851CCA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851CCA, octal 41216312, decimal 8,723,658.
What flights does 851CCA operate?
Mode-S 851CCA has broadcast 20 distinct callsigns, including JTA63, JTA5, JTA9, JTA53, JTA1.