Apparatus

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sensors Mode-S transponder

8A0639

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-LUU · AIRBUS A-320

Hex
8A0639
Octal
42403071
Decimal
9,045,561
Country
ID
Tail
PK-LUU
Type
A320
No current signal · last broadcast 1h ago
Flights observed
236
Distinct callsigns
20
Country
ID
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 8A0639.

Country allocation

The ICAO 24-bit address 8A0639 falls within the block assigned to Indonesia (ID) by ICAO Annex 10, Volume III. Every aircraft registered in Indonesia 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
BTK7311 - 10 2026-07-13
BTK7583 - 7 2026-07-13
BTK7055 Batik Air 6 2026-07-07
BTK6526 - 6 2026-06-29
BTK7511 - 5 2026-07-08
BTK6170 - 5 2026-06-19
BTK7581 - 4 2026-07-13
BTK7308 - 4 2026-07-06
BTK6898 - 4 2026-06-20
BTK6527 - 4 2026-06-29
BTK6296 - 4 2026-06-29
BTK7517 - 3 2026-07-09
BTK7512 Batik Air 3 2026-06-06
BTK7309 - 3 2026-07-08
BTK7158 Batik Air 3 2026-04-22
BTK6818 - 3 2026-06-18
BTK6807 Batik Air 3 2026-05-20
BTK6566 - 3 2026-06-27
BTK6509 Batik Air 3 2026-05-05
BTK6430 Batik Air 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BTK7513 - Jul 14, 01:55 UTCJul 14, 02:15 UTC20m
2026-07-13 BTK7311 - Jul 13, 09:00 UTCJul 13, 13:05 UTC4h 5m
2026-07-13 BTK7582 - Jul 13, 07:30 UTCJul 13, 07:40 UTC10m
2026-07-13 BTK7583 - Jul 13, 04:30 UTCJul 13, 05:10 UTC40m
2026-07-13 BTK7581 - Jul 13, 00:05 UTCJul 13, 03:20 UTC3h 15m
2026-07-12 BTK7310 - Jul 12, 09:05 UTCJul 12, 12:45 UTC3h 40m
2026-07-12 BTK7583 - Jul 12, 04:20 UTCJul 12, 07:35 UTC3h 15m
2026-07-12 BTK7581 - Jul 12, 00:01 UTCJul 12, 03:01 UTC3h 0m
2026-07-11 BTK7311 - Jul 11, 09:10 UTCJul 11, 09:50 UTC40m
2026-07-11 BTK7583 - Jul 11, 04:25 UTCJul 11, 07:40 UTC3h 15m
2026-07-11 BTK7581 - Jul 11, 00:00 UTCJul 11, 00:40 UTC40m
2026-07-10 BTK7311 - Jul 10, 09:30 UTCJul 10, 10:10 UTC40m
2026-07-10 BTK7582 - Jul 10, 08:25 UTCJul 10, 08:35 UTC10m
2026-07-10 BTK7583 - Jul 10, 05:35 UTCJul 10, 06:10 UTC35m
2026-07-10 BTK7580 - Jul 10, 04:05 UTCJul 10, 04:15 UTC10m
2026-07-09 BTK7581 - Jul 9, 23:55 UTCJul 10, 00:40 UTC45m
2026-07-09 BTK7503 - Jul 9, 11:05 UTCJul 9, 11:30 UTC25m
2026-07-09 BTK7052 - Jul 9, 09:55 UTCJul 9, 10:05 UTC10m
2026-07-09 BTK7051 - Jul 9, 07:20 UTCJul 9, 07:35 UTC15m
2026-07-09 BTK7517 - Jul 9, 02:50 UTCJul 9, 05:40 UTC2h 50m
2026-07-08 BTK7511 - Jul 8, 22:30 UTCJul 9, 01:40 UTC3h 10m
2026-07-08 BTK7311 - Jul 8, 09:30 UTCJul 8, 10:10 UTC40m
2026-07-08 BTK7309 - Jul 8, 04:25 UTCJul 8, 08:15 UTC3h 50m
2026-07-07 BTK7055 HLP → PLM Jul 7, 12:30 UTCJul 7, 12:45 UTC15m
2026-07-07 BTK7501 - Jul 7, 06:45 UTCJul 7, 10:05 UTC3h 20m
2026-07-06 BTK7511 - Jul 6, 22:30 UTCJul 6, 23:10 UTC40m
2026-07-06 BTK7515 - Jul 6, 11:20 UTCJul 6, 11:45 UTC25m
2026-07-06 BTK7308 - Jul 6, 04:10 UTCJul 6, 08:10 UTC4h 0m
2026-07-06 BTK7053 - Jul 6, 00:50 UTCJul 6, 01:05 UTC15m
2026-07-01 BTK6140 CGK → TTE Jul 1, 19:30 UTCJul 1, 19:40 UTC10m
2026-07-01 BTK6293 UPG → CGK Jul 1, 12:05 UTCJul 1, 12:35 UTC30m
2026-06-29 BTK6296 - Jun 29, 10:34 UTCJun 29, 10:59 UTC25m
2026-06-29 BTK6527 - Jun 29, 09:00 UTCJun 29, 09:14 UTC15m
2026-06-29 BTK6526 - Jun 29, 04:14 UTCJun 29, 05:00 UTC45m
2026-06-29 BTK6431 - Jun 29, 02:50 UTCJun 29, 02:59 UTC10m
2026-06-28 BTK6430 CGK → BEJ Jun 28, 21:45 UTCJun 28, 21:55 UTC10m
2026-06-28 BTK7040 - Jun 28, 11:14 UTCJun 28, 11:35 UTC20m
2026-06-28 BTK7041 - Jun 28, 08:50 UTCJun 28, 09:39 UTC50m
2026-06-28 BTK7532 - Jun 28, 07:20 UTCJun 28, 07:29 UTC10m
2026-06-28 BTK7531 - Jun 28, 04:50 UTCJun 28, 05:34 UTC45m
2026-06-28 BTK6343 - Jun 28, 03:00 UTCJun 28, 03:14 UTC15m
2026-06-28 BTK6342 - Jun 28, 00:39 UTCJun 28, 01:10 UTC30m
2026-06-27 BTK6887 - Jun 27, 11:30 UTCJun 27, 13:15 UTC1h 45m
2026-06-27 BTK6886 - Jun 27, 08:25 UTCJun 27, 09:55 UTC1h 30m
2026-06-27 BTK6566 - Jun 27, 01:59 UTCJun 27, 05:10 UTC3h 10m
2026-06-26 BTK6885 - Jun 26, 23:00 UTCJun 27, 00:50 UTC1h 50m
2026-06-26 BTK6884 - Jun 26, 13:15 UTCJun 26, 14:15 UTC1h 0m
2026-06-26 BTK6143 - Jun 26, 10:44 UTCJun 26, 11:00 UTC15m
2026-06-25 BTK6236 CGK → UPG Jun 25, 23:24 UTCJun 25, 23:44 UTC20m
2026-06-25 BTK6353 SRG → CGK Jun 25, 11:50 UTCJun 25, 12:25 UTC35m

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 PK-LUU page for operator, model, and routing details .

Mode-S 8A0639 frequently asked

What is Mode-S code 8A0639?
8A0639 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-LUU.
Where is Mode-S 8A0639 registered?
Mode-S code 8A0639 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0639 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0639, octal 42403071, decimal 9,045,561.
What flights does 8A0639 operate?
Mode-S 8A0639 has broadcast 20 distinct callsigns, including BTK7311, BTK7583, BTK7055, BTK6526, BTK7511.