Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
116
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 Batik Air 4 2026-05-29
BTK6526 Batik Air 4 2026-05-19
BTK7158 Batik Air 3 2026-04-22
BTK6807 Batik Air 3 2026-05-20
BTK6527 Batik Air 3 2026-05-18
BTK6509 Batik Air 3 2026-05-05
BTK6344 Batik Air 3 2026-05-20
BTK6170 Batik Air 3 2026-05-18
BTK7583 Batik Air 2 2026-05-29
BTK7368 Batik Air 2 2026-05-17
BTK7157 Batik Air 2 2026-04-22
BTK7155 Batik Air 2 2026-04-21
BTK6899 Batik Air 2 2026-05-06
BTK6898 Batik Air 2 2026-05-05
BTK6865 Batik Air 2 2026-05-03
BTK6857 Batik Air 2 2026-04-19
BTK6852 Batik Air 2 2026-04-19
BTK6825 Batik Air 2 2026-05-07
BTK6806 Batik Air 2 2026-05-20
BTK6576 Batik Air 2 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BTK7511 HLP → SUB May 29, 22:45 UTCMay 29, 23:25 UTC40m
2026-05-29 BTK7311 HLP → DPS May 29, 09:05 UTCMay 29, 09:35 UTC30m
2026-05-29 BTK7583 HLP → MLG May 29, 04:20 UTCMay 29, 07:45 UTC3h 25m
2026-05-28 BTK7311 HLP → DPS May 28, 09:05 UTCMay 28, 12:35 UTC3h 30m
2026-05-28 BTK7308 DPS → HLP May 28, 07:40 UTCMay 28, 08:05 UTC25m
2026-05-27 BTK6008 PER → DPS May 27, 06:34 UTCMay 27, 07:10 UTC35m
2026-05-27 BTK6007 DPS → PER May 27, 04:34 UTCMay 27, 05:14 UTC40m
2026-05-25 BTK7311 HLP → DPS May 25, 09:05 UTCMay 25, 09:40 UTC35m
2026-05-25 BTK7583 HLP → MLG May 25, 04:45 UTCMay 25, 07:25 UTC2h 40m
2026-05-25 BTK7580 MLG → HLP May 25, 03:10 UTCMay 25, 03:20 UTC10m
2026-05-24 BTK7311 HLP → DPS May 24, 09:20 UTCMay 24, 13:00 UTC3h 40m
2026-05-24 BTK7309 HLP → DPS May 24, 03:55 UTCMay 24, 04:35 UTC40m
2026-05-23 BTK7055 HLP → PLM May 23, 12:15 UTCMay 23, 12:40 UTC25m
2026-05-23 BTK7512 SUB → HLP May 23, 10:15 UTCMay 23, 10:25 UTC10m
2026-05-23 BTK6406 CGK → SUB May 23, 06:50 UTCMay 23, 07:30 UTC40m
2026-05-23 BTK6351 SRG → CGK May 23, 05:05 UTCMay 23, 05:40 UTC35m
2026-05-23 BTK6350 CGK → SRG May 23, 03:10 UTCMay 23, 03:40 UTC30m
2026-05-22 BTK6200 CGK → PKY May 22, 09:00 UTCMay 22, 09:10 UTC10m
2026-05-22 BTK6870 CGK → PLM May 22, 05:00 UTCMay 22, 05:15 UTC15m
2026-05-21 BTK6430 CGK → BEJ May 21, 21:50 UTCMay 21, 22:00 UTC10m
2026-05-21 BTK6205 PKN → CGK May 21, 10:10 UTCMay 21, 10:20 UTC10m
2026-05-21 BTK6566 CGK → MLG May 21, 01:35 UTCMay 21, 05:10 UTC3h 35m
2026-05-20 BTK6807 DJB → CGK May 20, 23:55 UTCMay 21, 00:05 UTC10m
2026-05-20 BTK6807 DJB → CGK May 20, 23:15 UTCMay 20, 23:25 UTC10m
2026-05-20 BTK6806 CGK → DJB May 20, 10:25 UTCMay 20, 11:10 UTC45m
2026-05-20 BTK6344 CGK → YIA May 20, 06:20 UTCMay 20, 08:50 UTC2h 30m
2026-05-20 BTK7540 YIA → CGK May 20, 03:15 UTCMay 20, 04:05 UTC50m
2026-05-20 BTK7533 CGK → YIA May 20, 01:20 UTCMay 20, 01:40 UTC20m
2026-05-20 BTK6807 DJB → CGK May 20, 00:05 UTCMay 20, 00:15 UTC10m
2026-05-19 BTK6806 CGK → DJB May 19, 10:30 UTCMay 19, 11:15 UTC45m
2026-05-19 BTK6526 CGK → LBJ May 19, 03:00 UTCMay 19, 08:05 UTC5h 5m
2026-05-19 BTK6171 AMQ → CGK May 19, 01:00 UTCMay 19, 01:15 UTC15m
2026-05-18 BTK6170 CGK → AMQ May 18, 17:45 UTCMay 18, 18:05 UTC20m
2026-05-18 BTK7058 PLM → HLP May 18, 12:30 UTCMay 18, 12:50 UTC20m
2026-05-18 BTK7059 HLP → PLM May 18, 10:05 UTCMay 18, 10:30 UTC25m
2026-05-18 BTK6527 LBJ → CGK May 18, 07:55 UTCMay 18, 08:05 UTC10m
2026-05-18 BTK6526 CGK → LBJ May 18, 03:10 UTCMay 18, 03:50 UTC40m
2026-05-18 BTK6375 SOC → CGK May 18, 00:20 UTCMay 18, 01:00 UTC40m
2026-05-17 BTK7368 CGK → SOC May 17, 10:45 UTCMay 17, 11:25 UTC40m
2026-05-17 BTK6564 CGK → MLG May 17, 06:15 UTCMay 17, 07:00 UTC45m
2026-05-17 BTK6805 DJB → CGK May 17, 04:20 UTCMay 17, 04:30 UTC10m
2026-05-17 BTK6804 CGK → DJB May 17, 02:15 UTCMay 17, 03:05 UTC50m
2026-05-16 BTK6362 CGK → SRG May 16, 12:50 UTCMay 16, 13:21 UTC30m
2026-05-16 BTK6564 CGK → MLG May 16, 06:10 UTCMay 16, 06:45 UTC35m
2026-05-15 BTK6362 CGK → SRG May 15, 12:35 UTCMay 15, 13:00 UTC25m
2026-05-15 BTK6143 UPG → CGK May 15, 10:40 UTCMay 15, 11:10 UTC30m
2026-05-08 BTK6288 CGK → UPG May 8, 17:25 UTCMay 8, 17:50 UTC25m
2026-05-08 BTK6575 SUB → CGK May 8, 13:05 UTCMay 8, 13:30 UTC25m
2026-05-08 BTK6576 CGK → SUB May 8, 10:25 UTCMay 8, 10:49 UTC25m
2026-05-08 BTK6576 CGK → SUB May 8, 10:09 UTCMay 8, 10:19 UTC10m

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, BTK6526, BTK7158, BTK6807, BTK6527.